PRIME RETAIL INC
S-3, 1998-12-07
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 7, 1998
                                                      REGISTRATION NO. 333-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                         ------------------------------
 
                                    FORM S-3
 
                             REGISTRATION STATEMENT
 
                                     UNDER
 
                           THE SECURITIES ACT OF 1933
                         ------------------------------
 
                               PRIME RETAIL, INC.
 
             (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                             <C>
           MARYLAND                      38-2559212
 (State or other jurisdiction         (I.R.S. Employer
     of incorporation or            Identification No.)
        organization)
</TABLE>
 
       100 EAST PRATT STREET, NINETEENTH FLOOR, BALTIMORE, MARYLAND 21202
                                 (410) 234-0782
 
    (Address, including zip code, and telephone number, including area code,
                        of principal executive offices)
 
                               C. ALAN SCHROEDER
                               PRIME RETAIL, INC.
                             100 EAST PRATT STREET
                                NINETEENTH FLOOR
                           BALTIMORE, MARYLAND 21202
                                 (410) 234-0782
 
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                         ------------------------------
 
                                   COPIES TO:
 
                             WAYNE D. BOBERG, ESQ.
                             STEVEN J. GAVIN, ESQ.
                                WINSTON & STRAWN
                              35 WEST WACKER DRIVE
                            CHICAGO, ILLINOIS 60601
                         ------------------------------
 
    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO PUBLIC: From time to
time after the effective date of this Registration Statement.
 
    If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. / /
 
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. /X/
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / /
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. / /
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. / /
                         ------------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
           TITLE OF EACH CLASS OF              AMOUNT TO BE REGISTERED          AGGREGATE                 AMOUNT OF
         SECURITIES TO REGISTERED(1)               PROPOSED MAXIMUM        OFFERING PRICE(2)(3)        REGISTRATION FEE
<S>                                            <C>                       <C>                       <C>
Preferred Stock, $.01 par value per
  share(5)...................................
Depository Shares(6).........................
Preferred Stock Warrants.....................            (4)
Common Stock, $.01 par value per share(7)....
Common Stock Warrants(4).....................
        Total................................                                $400,000,000(8)             $111,200 (8)
</TABLE>
 
                                                        (FOOTNOTES ON NEXT PAGE)
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING
PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
(FOOTNOTES CONTINUED FROM PREVIOUS PAGE)
 
(1) This Registration Statement also covers contracts which may be issued by the
    Registrant under which the counterparty may be required to purchase
    securities covered hereby. Such contracts would be issued with the
    applicable securities covered hereby. In addition, securities registered
    hereunder may be sold separately, together or as units with other securities
    registered hereunder.
 
(2) In U.S. Dollars or the equivalent thereof denominated in one or more foreign
    currencies or units of two or more foreign currencies or composite
    currencies (such as European Currency Units).
 
(3) Estimated solely for purposes of calculating the registration fee. No
    separate consideration will be received for Common Stock that is issued upon
    conversion of Preferred Stock or Depository Shares registered hereunder or
    upon exercise of the Common Stock Warrants registered hereunder, as the case
    may be. The aggregate maximum offering price of all securities issued
    pursuant to this Registration Statement will not exceed $400,000,000.
 
(4) Omitted pursuant to General Instruction II.D of Form S-3 under the
    Securities Act of 1933, as amended.
 
(5) Such indeterminate number of shares of Preferred Stock as may from time to
    time be issued at indeterminate prices or issuable upon conversion of
    Preferred Stock Warrants registered hereunder and which may be issued in one
    or more series.
 
(6) To be evidenced by Depository Receipts representing an interest in a
    specified portion of a share of Preferred Stock.
 
(7) Such indeterminate number of shares of Common Stock as may from time to time
    be issued at indeterminate prices or issuable upon conversion of Preferred
    Stock or Depository Shares registered hereunder or upon the exercise of
    Common Stock Warrants registered hereunder, as the case may be.
 
(8) Calculated pursuant to Rule 457(o) of the rules and regulations under the
    Securities Act of 1933, as amended.
<PAGE>
THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. THESE
SECURITIES MAY NOT BE SOLD UNTIL THE REGISTRATION STATEMENT FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN OFFER TO BUY THESE
SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.
<PAGE>
               SUBJECT TO COMPLETION, DATED DECEMBER       , 1998
 
PROSPECTUS
 
                                  $400,000,000
 
                               PRIME RETAIL, INC.
                                PREFERRED STOCK
                               DEPOSITORY SHARES
                            PREFERRED STOCK WARRANTS
                                  COMMON STOCK
                             COMMON STOCK WARRANTS
 
                            CORPORATE HEADQUARTERS:
                             100 East Pratt Street
                                Nineteenth Floor
                           Baltimore, Maryland 21202
                                 (410) 234-0782
 
                                    -------
                            ------------------------
                                    -------
 
               We will provide specific terms of these securities
                       in supplements to this prospectus.
 
               You should read this prospectus and any supplement
                          carefully before you invest.
 
                                    -------
                            ------------------------
                                    -------
 
    Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.
 
                                    -------
                            ------------------------
                                    -------
 
                     THE DATE OF THIS PROSPECTUS IS
<PAGE>
                             ABOUT THIS PROSPECTUS
 
    This prospectus is part of a registration statement that we filed with the
SEC utilizing a "shelf" registration process. Under this process, Prime Retail,
Inc. may offer and sell any combination of the securities described in this
prospectus in one or more offerings up to a total dollar amount of $400,000,000.
This prospectus provides you with a general description of the securities we may
offer. Each time we offer securities, we will provide a prospectus supplement
and attach it to this prospectus. The prospectus supplement will contain
specific information about the terms of the securities being offered at that
time. The prospectus supplement may also add, update or change information
contained in this prospectus. You should read both this prospectus and any
prospectus supplement, together with any additional information you may need to
make your investment decision.
 
                      WHERE YOU CAN FIND MORE INFORMATION
 
    We file annual, quarterly and current reports, proxy statements and other
information with the SEC. You may read and copy the reports, statements or other
information we file at the SEC's public reference rooms in Washington, D.C. You
can request copies of these documents, upon payment of photocopying fees, by
writing to the SEC. Please call the SEC at 1-800-SEC-0330 for further
information on the operation of the public reference rooms. Our SEC filings are
also available to the public on the SEC's internet site (http://www.sec.gov).
These documents are also available for viewing at the offices of the New York
Stock Exchange, 20 Broad Street, New York, New York 10005.
 
    We have filed certain documents with the SEC and are incorporating by
reference the documents listed below and any future filings made with the SEC
under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934,
as amended, until all of the securities under this registration statement are
sold. Incorporating them by reference means that we are making the documents
listed below a part of this prospectus by referring to these documents and
declaring that you should consider them to be part of this prospectus as if they
were fully copied in this prospectus.
 
 1. The annual report of Prime Retail, Inc., one of our predecessors ("Former
    Prime"), on Form 10-K and Form 10-K/A for the year ended December 31, 1997.
 
 2. Former Prime's quarterly report on Form 10-Q for the quarter ended March 31,
    1998.
 
 3. Former Prime's current report on Form 8-K dated February 1, 1998.
 
 4. The information prescribed by Items 12, 13, 14, 15 and 16 of Form S-11
    contained in Former Prime's Registration Statement on Form S-11 dated June
    28, 1996, as amended (Registration No. 333-01666).
 
 5. The annual report of Horizon Group, Inc., one of our predecessors, on Form
    10-K and Amendment No. 1 on Form 10-K/A for the year ended December 31,
    1997.
 
 6. Horizon Group, Inc.'s current report on Form 8-K dated February 1, 1998.
 
 7. Horizon Group, Inc.'s current report on Form 8-K dated April 1, 1998.
 
 8. The Joint Proxy Statement of Former Prime and Horizon Group, Inc.,
    Prospectus of Prime Retail, Inc. and Information Statement of Horizon Group
    Properties, Inc. on Form S-4 dated May 14, 1998.
 
 9. Prime Retail, Inc.'s current report on Form 8-K dated June 15, 1998.
 
 10. Prime Retail, Inc.'s current report on Form 8-K/A dated June 15, 1998.
 
 11. Prime Retail, Inc.'s quarterly report on Form 10-Q for the quarter ended
     June 30, 1998.
 
 12. Prime Retail, Inc.'s quarterly report on Form 10-Q for the quarter ended
     September 30, 1998.
 
                                       1
<PAGE>
    You may request a copy of these filings, at no cost, by writing or
telephoning us at the following address:
 
    Prime Retail, Inc.
    100 East Pratt Street
    Baltimore, Maryland 21202
    Attention: Corporate Secretary
    (410) 234-0782
 
    You should rely only on the information incorporated by reference or
provided in this prospectus or any prospectus supplement. We have not authorized
anyone else to provide you with different information. We are not making an
offer of these securities in any state where the offer is permitted. You should
not assume that the information in this prospectus or any prospectus supplement
is accurate as of any date other than the date on the front of those documents.
 
          PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 SAFE HARBOR
                              CAUTIONARY STATEMENT
 
    THIS PROSPECTUS AND THE DOCUMENTS INCORPORATED BY REFERENCE HEREIN CONTAIN
"FORWARD-LOOKING" STATEMENTS, AS DEFINED IN THE PRIVATE SECURITIES LITIGATION
REFORM ACT OF 1995, THAT ARE BASED ON CURRENT EXPECTATIONS, ESTIMATES AND
PROJECTIONS. STATEMENTS THAT ARE NOT HISTORICAL FACTS, INCLUDING STATEMENTS
ABOUT PRIME RETAIL, INC.'S BELIEFS AND EXPECTATIONS, ARE FORWARD-LOOKING
STATEMENTS. THESE STATEMENTS ARE NOT GUARANTEES OF FUTURE PERFORMANCE, EVENTS OR
RESULTS AND INVOLVE POTENTIAL RISKS AND UNCERTAINTIES. ACCORDINGLY, ACTUAL
RESULTS MAY DIFFER MATERIALLY. PRIME RETAIL, INC. UNDERTAKES NO OBLIGATION TO
UPDATE PUBLICLY ANY FORWARD-LOOKING STATEMENTS, WHETHER AS A RESULT OF NEW
INFORMATION, FUTURE EVENTS OR OTHERWISE.
 
    IMPORTANT FACTS THAT MAY AFFECT THESE PROJECTIONS OR EXPECTATIONS INCLUDE,
BUT ARE NOT LIMITED TO: GENERAL ECONOMIC AND BUSINESS CONDITIONS, WHICH WILL,
AMONG OTHER THINGS, AFFECT DEMAND FOR OUTLET CENTER PROPERTIES, AVAILABILITY AND
CREDITWORTHINESS OF PROSPECTIVE TENANTS, LEASE RENTS AND THE AVAILABILITY OF
FINANCING; ADVERSE CHANGES IN THE REAL ESTATE MARKETS INCLUDING, AMONG OTHER
THINGS, COMPETITION WITH OTHER COMPANIES, RISKS OF REAL ESTATE ACQUISITION AND
DEVELOPMENT; GOVERNMENTAL ACTIONS AND INITIATIVES; AND ENVIRONMENTAL
REQUIREMENTS, AND THE OTHER FACTORS DESCRIBED IN THIS PROSPECTUS UNDER THE
HEADING "RISK FACTORS."
 
                            ABOUT PRIME RETAIL, INC.
 
    Prime Retail, Inc. is a self-administered and self-managed real estate
investment trust ("REIT") engaged in the ownership, development, and management
of factory outlet centers. We believe that we are the largest owner and operator
of factory outlet centers in the United States. As of September 30, 1998, our
portfolio consisted of 50 factory outlet centers in 26 states totaling
approximately 14.0 million square feet of gross leasable area. As a
fully-integrated real estate firm, we provide development, construction,
finance, leasing, marketing and management services for all of the properties in
our portfolio. Our properties are held and all of our business and operations
are conducted through Prime Retail, L.P. (the "Operating Partnership"), which
owns equity interests in various subsidiary partnerships. Prime Retail, Inc.
controls the Operating Partnership as its sole general partner and is dependent
upon the distributions or other payments from the Operating Partnership in order
to meet its financial obligations.
 
    Prime Retail, Inc. is a Maryland corporation that was incorporated on
November 12, 1997. Formerly known as Sky Merger Corp., we are the surviving
company of the mergers of Former Prime and Horizon Group, Inc. into Sky Merger
Corp. At the effective time of these mergers on June 15, 1998, the separate
legal existence of each of Former Prime and Horizon Group, Inc. ceased, and Sky
Merger Corp. was renamed "Prime Retail, Inc." Although, from a legal point of
view, Sky Merger Corp. was the surviving company of the mergers, our business is
largely conducted in the same manner as, and under the senior management of,
Former Prime.
 
    Our executive offices are located at 100 East Pratt Street, Nineteenth
Floor, Baltimore, Maryland 21202, and our telephone number is (410) 234-0782.
 
                                       2
<PAGE>
                                  RISK FACTORS
 
    Set forth below are the risks that we believe are material to investors who
purchase or own our securities.
 
ADVERSE CONSEQUENCES OF DEBT FINANCING
 
    Our business is subject to the risks normally associated with debt or
preferred equity financing. For example:
 
    - Our cash flow may not be sufficient to make required payments of
      principal, interest and distributions.
 
    - Our existing indebtedness may not be refinanced or refinanced on terms as
      favorable as existing terms.
 
    - We may be unable to finance necessary capital expenditures.
 
    If we are unable to refinance our indebtedness on acceptable terms, or at
all, we might be forced to sell one or more of our properties on disadvantageous
terms. These sales could result in losses and significantly reduce our cash
available for distribution to shareholders. If economic conditions or other
factors result in higher interest rates upon any refinancing, our interest
expense would increase and adversely affect our ability to make shareholder
distributions. Finally, if a property is mortgaged and we are unable to meet
mortgage payments, the mortgagee could foreclose upon the property or pursue
other remedies that result in a loss to our income and asset value.
 
DEPENDENCE ON EXTERNAL SOURCES OF CAPITAL
 
    To qualify as a REIT, we must distribute to our shareholders each year at
least 95% of our REIT taxable income (excluding any net capital gain). Because
of these distribution requirements and the amount of distributions we currently
pay to our shareholders, we will not be able to fund all future capital needs,
including capital for acquisitions, with income from operations. We therefore
have to rely on third-party sources of capital, which may or may not be
available on favorable terms or at all. Our access to third-party sources of
capital depends on a number of things, including the market's perception of our
growth potential and our current and potential future earnings and cash flow.
Moreover, additional equity offerings may result in substantial dilution of
shareholders' interests, and additional debt financing may substantially
increase our leverage and adversely affect our debt service coverage ratios.
 
ADVERSE IMPACT OF OUR FAILURE TO CONTINUE TO QUALIFY AS A REIT
 
    We intend to qualify as a REIT for federal income tax purposes. A REIT
generally is not subject to federal income tax at the corporate level on income
which it currently distributes to its shareholders so long as it distributes at
least 95% of its taxable income (excluding any net capital gain) each year.
 
    Many of the REIT requirements are highly technical and complex. The
determination that we qualify as a REIT requires an analysis of various factual
matters and circumstances which are not entirely within our control. The fact
that we hold our assets in partnership form further complicates the application
of the REIT requirements. Furthermore, Congress and the Internal Revenue Service
might make changes to the tax laws and regulations, and the courts might issue
new rulings, that might make it more difficult, or impossible, for us to remain
qualified as a REIT.
 
    If we fail to qualify as a REIT, we would be subject to federal income tax
at regular corporate rates. Also, unless entitled to relief under certain
statutory provisions, we would be ineligible for qualification as a REIT for
four years following the year in which we failed to qualify. Such
disqualification would lower our net earnings available for investment or
distribution to shareholders due to the additional tax liability. This likely
would have a significant adverse affect on the value of our securities.
 
                                       3
<PAGE>
OWNERSHIP LIMITS NECESSARY TO MAINTAIN REIT QUALIFICATION
 
    For us to continue to qualify as a REIT, not more than 50% of the value of
our outstanding capital stock may be owned, directly or indirectly, by five or
fewer individuals during the last half of a taxable year. Our charter contains
certain restrictions on the ownership and transfer of our capital stock which
are intended to prevent concentration of stock ownership. These restrictions,
however, do not ensure that we will be able to satisfy the above requirement
primarily, though not exclusively, as a result of fluctuations in values among
the different classes of our capital stock. If we fail to satisfy such
requirement, our status as a REIT will terminate, and we will not be able to
prevent such termination.
 
    Our charter prohibits ownership of capital stock that, if effective, would
result in:
 
    - Prime Retail, Inc. being "closely held" within the meaning of the Internal
      Revenue Code,
 
    - the outstanding shares of our capital stock being beneficially owned by
      fewer than 100 persons, or
 
    - Prime Retail, Inc. otherwise failing to qualify as a REIT.
 
    Our Board of Directors may exempt a person from this ownership limit under
specified conditions. Absent an exemption or a waiver, any attempted transfer of
shares to a person who, as a result of such transfer, would violate the
ownership limitations set forth in our charter will be deemed void and the
shares purportedly transferred would be converted into shares of a separate
class of capital stock with no voting rights and no rights to distributions.
 
    The ownership limits may:
 
    - discourage a change of control of Prime Retail, Inc.,
 
    - deter tender offers for such shares, which offers may be attractive to our
      shareholders, or
 
    - limit the opportunity for stockholders to receive a premium over the
      then-prevailing market price for their shares.
 
ADVERSE EFFECT OF INABILITY TO PURSUE DEVELOPMENT ACTIVITIES; DEVELOPMENTS MAY
  NOT BE PROFITABLE
 
    We intend to continue to pursue development opportunities in the United
States, Puerto Rico and Western Europe. In connection with these activities, we
will incur risks in addition to those applicable to the ownership and operation
of real estate. For example:
 
    - Development opportunities explored by us may be abandoned or delayed.
 
    - Construction costs of a project may exceed original estimates.
 
    - Occupancy rates and rents at a completed project will not be sufficient to
      make the project profitable.
 
    - We may be unable to obtain any required governmental approvals or permits.
 
    Problems encountered in our development activities may adversely affect our
business, financial condition and results of operations as well as our ability
to pay expected distributions to shareholders.
 
RISKS OF ACQUISITION ACTIVITIES
 
    We intend to continue to pursue acquisitions of factory outlet centers in
the United States and abroad. Acquisitions of factory outlet centers, like that
of commercial real estate, entail risks that the investment will fail to meet
expectations. The success of our acquisition plans will depend on several
factors, including
 
    - our ability to identify suitable acquisition opportunities,
 
    - our ability to successfully integrate acquired operations,
 
    - competition for acquisitions on acceptable terms, and
 
    - the financial performance of properties following acquisition.
 
                                       4
<PAGE>
    If we fail to achieve our acquisition plans or to integrate or operate
acquired properties effectively, such failure could have a material adverse
effect on our business, financial condition and results of operations as well as
our ability to pay expected distributions to shareholders.
 
NO LIMITATION IN ORGANIZATIONAL DOCUMENTS ON INCURRENCE OF DEBT
 
    Our organizational documents do not contain any limitation on the amount of
indebtedness we might incur. If we were to become more highly leveraged, the
resulting increase in our debt service obligations could adversely affect our
available cash flow and ability to make expected distributions to shareholders.
This would also increase the risk of default on our obligations, including
financial covenants contained in our debt and Preferred Stock instruments.
 
DECLINE IN DEVELOPMENT OF NEW CENTERS; COMPETITION; GENERAL RETAIL INDUSTRY
  RISKS
 
    DECLINE IN DEVELOPMENT OF NEW CENTERS.  In recent years, the rate of growth
in the development of new factory outlet centers has declined significantly.
There can be no assurance that this trend in declining development will not
continue, or that the development of newer factory outlet centers will increase
in the future.
 
    COMPETITION FROM OTHER OUTLET CENTERS.  There are numerous developers and
real estate companies that are engaged in the development or ownership of outlet
centers and are expected to compete with Prime Retail, Inc. in seeking merchants
for outlet centers. This results in competition for attractive locations and for
merchants who operate outlet center stores, particularly for those manufacturers
featuring quality and designer brand name merchandise with proven customer
drawing power.
 
    In addition, the development of an outlet center with a more convenient
location or lower rents may attract our merchants or cause them to seek more
favorable lease terms at or prior to renewal of their leases and, accordingly,
may affect adversely the business, revenues and sales volume of our outlet
centers.
 
    COMPETITION FROM TRADITIONAL FULL PRICE RETAILERS AND OTHERS.  Most of the
merchandise produced by manufacturers is sold through traditional full price
retail channels, such as large department stores and other mass merchandisers.
Manufacturers generally do not wish to jeopardize retail relationships by
locating their outlet stores in locations that directly compete with traditional
retailers. As a result, our outlet centers are typically constructed at least 20
miles from the nearest regional mall. These locations are generally less
attractive to consumers because they tend to require more travel time. A
reduction of pricing discounts by manufacturers, increased competition by
traditional retailers or a perception by consumers that such pricing
differentials are not significant would reduce the competitive advantage offered
by outlet stores to consumers and, consequently, adversely affect the business,
revenues and/or sales volume of our outlet centers. There can be no assurance
that the outlet center business will not be adversely affected by other changes
in the distribution and sale of retail goods, such as "off-price" retailers,
direct mail and telemarketing and the emergence of direct sales through the
internet.
 
    GENERAL RETAIL INDUSTRY RISKS.  The outlet center market is a component of
the retail industry. The retail industry is subject to external factors such as
inflation, consumer confidence, unemployment rates and consumer tastes and
preferences. In the event that the retail industry experiences down cycles,
manufacturers and merchants of retail merchandise may experience economic
difficulties and/or may be less likely to renew existing leases at outlet
centers or to expand distribution channels into new outlet centers.
 
                                       5
<PAGE>
GENERAL REAL ESTATE INVESTMENT RISKS
 
    GENERAL.  Investments in Prime Retail, Inc. will be subject to the risks
incident to the ownership and operation of commercial retail real estate. These
risks include:
 
    - changes in national and international economic or local market conditions,
 
    - competition for merchants from other retail properties, including other
      outlet centers,
 
    - changes in market rental rates,
 
    - the need to periodically renovate, repair and relet space and to pay the
      costs thereof, and
 
    - competition for shoppers from other retail venues, including the internet.
 
    Equity real estate investments are relatively illiquid compared to most
financial assets and, therefore, tend to limit our ability to vary our portfolio
promptly in response to changes in economic or other conditions. Substantially
all of our owned properties are outlet centers. In addition, certain significant
expenditures associated with each equity investment (such as debt service, real
estate taxes and operating and maintenance costs) are generally not reduced when
circumstances cause a reduction in income from the investment. If any of our
outlet centers fails to succeed, either because the concept of the outlet center
has lost favor or because of poor results at an individual center, our ability
to convert the center to an attractive alternative use or to sell the center to
recoup our investment may be limited. Should such an event occur, our income and
available cash flow would be adversely affected.
 
    BANKRUPTCY OF MERCHANTS.  Because rental income will be a principal source
of our operating revenue, our financial condition and results of operations
would be adversely affected if a significant number of our merchants were unable
to meet their lease obligations and if, following such defaults, we were unable
to relet the space to new merchants on economically favorable terms. Moreover,
the bankruptcy or insolvency of a single major merchant may have an adverse
effect on the income produced by certain of our properties. In the event of
default by a lessee, we may experience delays in enforcing our rights as
landlord and may incur substantial costs in protecting our investment and
reletting such space in our properties.
 
    RENEWAL OF LEASES AND RELETTING OF SPACE.  We will be subject to certain
risks upon expiration of leases for space located in our properties. For
example:
 
    - The leases may not be renewed.
 
    - The space may not be relet.
 
    - The terms of renewal or reletting (including the cost of required
      renovations or concessions to merchants) may be less favorable than
      current lease terms.
 
In general, the leases relating to our outlet centers have a term of five to
seven years with an option to renew for a period equal to the length of the
initial term. If we are unable to promptly relet or renew our leases for all or
a substantial portion of the space currently leased, or if the rental rates upon
such renewal or reletting are significantly lower than expected rates, or if our
reserves for renovations and concessions prove inadequate, then our cash flow
and, consequently, our ability to make expected distributions to shareholders
may be adversely affected.
 
    UNINSURED LOSS.  We intend to carry comprehensive liability, fire, flood,
extended coverage and rental loss insurance with respect to our properties with
policy specifications and insured limits customarily carried for similar
properties. There are, however, types of losses from wars or, in certain
locations, earthquakes that may be either uninsurable or not insurable on
economically viable terms. Should an uninsured loss occur, we could lose our
capital investment and/or the anticipated profits and cash flow from one or more
properties.
 
                                       6
<PAGE>
LIMITS ON CHANGES IN CONTROL
 
    OWNERSHIP LIMITS.  The ownership limits discussed above, as well as our
ability to issue additional shares of common stock or other shares which may
have rights and preferences senior to our common stock, may:
 
    - discourage a change of control of Prime Retail, Inc.,
 
    - deter tender offers for such shares, which offers may be attractive to our
      shareholders, or
 
    - limit the opportunity for stockholders to receive a premium over the
      then-prevailing market price for their shares that might otherwise exist
      if an investor were attempting to assemble a block of our capital stock in
      excess of the ownership limit or otherwise effect a change of control.
 
    STAGGERED BOARD.  Our Board of Directors is divided into three classes of
directors. The terms of the classes expire in 1999, 2000 and 2001, respectively.
As the term of each class expires, directors for that class will be elected for
a three-year term and the directors in the other two classes will continue in
office. The staggered terms for directors may impede the shareholders' ability
to change control of Prime Retail, Inc. even if a change in control were in the
shareholders' interest.
 
    PREFERRED STOCK.  Our charter authorizes the Board of Directors to issue up
to 24,315,000 shares of preferred stock and to establish the preferences and
rights, including the right to vote and the right to convert into shares of
common stock, of any preferred stock issued. The power to issue preferred stock
could have the effect of delaying or preventing a change in control of Prime
Retail, Inc. even if a change in control were in the shareholders' interest.
 
    MARYLAND BUSINESS COMBINATION LAW.  Provisions of Maryland law applicable to
us prohibit business combinations (i) with any person who beneficially owns 10%
or more of the voting power of outstanding shares, (ii) with an affiliate of us
who, at any time within the two-year period prior to the date in question, was
the beneficial owner of 10% or more of the voting power of our outstanding
voting shares (an "interested stockholder"), or (iii) with an affiliate of an
interested stockholder. These prohibitions last for five years after the most
recent date on which the interested stockholder became an interested
stockholder. Thereafter, any such business combination must be recommended by
our Board of Directors and approved by the affirmative vote of at least (a) 80%
of the votes entitled to be cast by holders of our outstanding voting shares and
(b) two-thirds of the votes entitled to be cast by holders of our voting shares
other than shares held by the interested stockholder. Such provisions could have
the effect of inhibiting a change in control even if a change in control were in
our shareholders' interest. These provisions of Maryland law do not apply,
however, to business combinations that are approved or exempted by our Board of
Directors prior to the time that the interested stockholder becomes an
interested stockholder.
 
POSSIBLE LIABILITY RELATING TO ENVIRONMENTAL MATTERS
 
    Under various federal, state and local laws, an owner or operator of real
property may become liable for the costs of removal or remediation of certain
hazardous or toxic substances released on or under its property. These laws
often impose such liability without regard to whether the owner or operator knew
of, or was responsible for, the release of such hazardous or toxic substances.
The cost of any required remediation and the owner's liability therefor as to
any property is generally not limited under such enactments and could exceed the
value of the property and/or the aggregate assets of the owner. The presence of
environmentally hazardous substances, or the failure to properly remediate such
substances, may adversely affect the owner's ability to sell or rent such
property or to obtain debt financing using such property as collateral.
Moreover, such laws are subject to change and any such change may result in
significant unanticipated expenditures, which could adversely affect our ability
to pay distributions to shareholders.
 
                                       7
<PAGE>
INFLUENCE OF MR. MICHAEL W. RESCHKE
 
    Michael W. Reschke, the Chairman of the Board of Directors and one of our
principal owners, is in a position to exercise significant influence over our
affairs. Mr. Reschke, through various affiliates, also owns substantial
interests in income producing properties unrelated to our operations. Mr.
Reschke is a director and substantial owner of Horizon Group Properties, Inc.
which owns and operates outlet centers. Under the terms of his employment
agreement, Mr. Reschke is permitted to devote a considerable portion of his time
to the management of such interests provided he is able to perform duties
customary to his position as Chairman of the Board of Directors.
 
                                       8
<PAGE>
                                USE OF PROCEEDS
 
    Unless otherwise specified in a supplement to this prospectus used to offer
specific securities, we intend to use the net proceeds from the sale of
securities under this prospectus for general corporate purposes, including the
development or acquisition of additional properties, the expansion and
improvement of certain properties in our portfolio, and the repayment of certain
indebtedness.
 
                RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND
                  PREFERRED STOCK DISTRIBUTIONS AND DIVIDENDS
 
    The following table sets forth the ratio of earnings to combined fixed
charges and preferred stock distributions and dividends for Prime Retail, Inc.
for the periods indicated.
 
<TABLE>
<CAPTION>
                             PRIME RETAIL, INC.
- ----------------------------------------------------------------------------
                                                                                        THE PREDECESSOR(1)
     NINE MONTHS                                                              --------------------------------------
 ENDED SEPTEMBER 30,
                              YEAR ENDED DECEMBER 31,        PERIOD MARCH 22     PERIOD JAN. 1        YEAR ENDED
- ----------------------  -----------------------------------   TO DEC. 31,        TO MARCH 21,       DECEMBER 31,
  1998        1997        1997        1996         1995           1994               1994                1993
- ---------     -----     ---------     -----        -----     ---------------  -------------------  -----------------
<S>        <C>          <C>        <C>          <C>          <C>              <C>                  <C>
    1.05x          (2)      1.04x          (2)          (2)            (2)                (2)                 (2)
</TABLE>
 
- ------------------------
 
(1) Reflects results of operations of eleven predecessor partnerships, the 40%
    interest in predecessor partnerships that previously owned two of the
    properties in our portfolio and the management and development operations
    acquired by us in connection with our initial public offering in March 1994.
 
(2) Earnings did not cover combined fixed charges and preferred stock
    distributions and dividends by $1,140,000 for the nine months ended
    September 30, 1997 and by $10,629,000, $11,312,000, and $4,423,000 for the
    years ended December 31, 1996, 1995, and 1993, respectively. For the period
    March 22, 1994 to December 31, 1994, earnings did not cover combined fixed
    charges and preferred stock distributions and dividends by $8,185,000. For
    the period January 1 to March 21, 1994, earnings did not cover combined
    fixed charges and preferred stock distributions and dividends by $2,366,000.
 
    For purposes of the foregoing computations, earnings consist of income
(loss) before minority interests less income from unconsolidated investment
partnerships, plus fixed charges (excluding capitalized interest). Combined
fixed charges and preferred stock dividends consist of interest costs whether
expensed or capitalized and amortization of debt issuance costs and preferred
stock dividends or distributions.
 
                 GENERAL DESCRIPTION OF THE OFFERED SECURITIES
 
    We may offer under this prospectus preferred stock, depository shares,
preferred stock warrants, common stock, common stock warrants, or any
combination of the foregoing, either individually or as units consisting of two
or more such securities. The aggregate offering price of securities offered by
this prospectus will not exceed $400,000,000. If securities offered by this
prospectus are offered as units, the terms of the units will be set forth in a
supplement to this prospectus.
 
                          DESCRIPTION OF COMMON STOCK
 
    As of December 1, 1998, we had issued and outstanding 42,736,742 shares of
common stock, $0.01 par value per share (the "Common Stock"). Our board of
directors (the "Board of Directors") has the authority to issue 107,263,258
additional shares of Common Stock.
 
    The outstanding shares of Common Stock are fully paid and nonassessable.
Subject to the preferential rights of any other shares or series of shares and
to the provisions of our Amended and Restated Articles of Incorporation (as
amended, the "Charter") regarding preferred stock, including shares of 10.5%
Series A Senior Cumulative Preferred Stock, $0.01 par value per share ("Series A
Preferred Stock"), 8.5%
 
                                       9
<PAGE>
Series B Cumulative Participating Convertible Preferred Stock, $0.01 par value
per share ("Series B Preferred Stock"), and Series C Cumulative Convertible
Redeemable Preferred Stock, $0.01 par value per share ("Series C Preferred
Stock"), and shares of Excess Stock, $0.01 par value per share ("Excess Stock"),
holders of shares of Common Stock are entitled to receive distributions on such
shares only when authorized and declared by the Board of Directors out of assets
legally available for such purpose and to share ratably in the assets legally
available for distribution to such holders in the event of the liquidation,
dissolution or winding-up of Prime Retail, Inc. after payment of, or adequate
provision for, all of its known debts and liabilities.
 
    We will not terminate our status as a REIT without the affirmative vote or
consent of the holders of at least a majority of the shares of Series A
Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Common
Stock outstanding at the time, voting together as a single class, given in
person or by proxy, either in writing or at a meeting.
 
    In general, each outstanding share of Common Stock entitles the holder to
one vote on all matters submitted to a vote of shareholders, including the
election of directors and, except as otherwise required by law or except as
provided with respect to any other class or series of shares, the holders of
such shares will possess exclusive voting power. There is no cumulative voting
in the election of directors, which means that the holders of a majority of the
outstanding shares of Common Stock can elect all of the directors then standing
for election and the holders of the remaining shares will not be able to elect
any directors.
 
    Holders of shares of Common Stock have no conversion, sinking fund,
redemption rights or preemptive rights to subscribe for any of our securities.
 
    In general, shares of a particular class of issued Common Stock have equal
dividend, distribution, liquidation and other rights, and have no preference,
appraisal or exchange rights.
 
    The Common Stock is listed on the NYSE under the trading symbol "PRT."
 
                         DESCRIPTION OF PREFERRED STOCK
 
    As of December 1, 1998, we had issued and outstanding 14,491,761 shares of
preferred stock, $0.01 par value per share ("Preferred Stock"), consisting of
2,300,000 shares of Series A Preferred Stock, 7,828,125 shares of Series B
Preferred Stock, and 4,363,636 shares of Series C Preferred Stock. The Board of
Directors has the authority to issue 9,823,239 additional shares of Preferred
Stock in one or more series and to fix the rights, preferences, privileges and
restrictions thereof.
 
PREFERRED STOCK GENERALLY
 
    The Board of Directors has the authority to issue additional shares of
Preferred Stock in one or more series and to fix the rights, preferences,
privileges and restrictions thereof, including dividend rights, dividend rates,
conversion rights, voting rights, terms of redemption, redemption prices,
liquidation preferences and the number of shares constituting any series or the
designation of such series without further vote or action by the stockholders,
subject to the rights of the holders of shares of Series A Preferred Stock,
Series B Preferred Stock and Series C Preferred Stock. The Board of Directors
could authorize the issuance of shares of Preferred Stock with terms and
conditions which could have the effect of discouraging a takeover or other
transaction which holders of some, or a majority, of shares of Common Stock
might believe to be in their interests or in which holders of some, or a
majority, of shares of Common Stock might receive a premium for their shares
over the then market price of such shares.
 
OUTSTANDING PREFERRED STOCK
 
    SERIES A PREFERRED STOCK.  The Series A Preferred Stock ranks senior to the
Series B Preferred Stock, Series C Preferred Stock and Common Stock with respect
to dividend rights and distributions upon liquidation, dissolution or
winding-up. Holders of shares of Series A Preferred Stock are entitled to
 
                                       10
<PAGE>
receive, when and as declared by the Board of Directors, out of funds legally
available for the payment of distributions, cumulative preferential cash
distributions in an amount per share of Series A Preferred Stock equal to $2.625
per annum. Such distributions are cumulative from the date of original issuance
and are payable quarterly in arrears on the fifteenth day of each March, June,
September and December, or, if such day is not a business day, on the next
succeeding business day. The shares of Series A Preferred Stock are not
convertible or entitled to the benefit of any sinking fund. On and after March
31, 1999, we, at our option, may redeem the shares of Series A Preferred Stock
for cash, in whole or in part, initially at a redemption price of $26.75 per
share and thereafter at prices declining ratably to $25.00 per share on and
after March 31, 2004, plus in each case accrued and unpaid distributions, if
any, to the redemption date. Upon any voluntary or involuntary liquidation,
dissolution or winding up of Prime Retail, Inc., the shares of Series A
Preferred Stock are entitled to a liquidation preference of $25.00 per share,
plus accrued and unpaid distributions to the date of payment, before any
distribution of assets is made to holders of shares of Series B Preferred Stock,
Series C Preferred Stock, Common Stock and any other class or series of our
shares ranking junior to the Series A Preferred Stock as to liquidation rights.
The Series A Preferred Stock is listed on the NYSE under the trading symbol
"PRT.pra."
 
    SERIES B PREFERRED STOCK.  The Series B Preferred Stock ranks senior to the
Series C Preferred Stock and Common Stock with respect to dividend rights and
distributions upon liquidation, dissolution or winding up. Subject to the
preferential rights of Series A Preferred Stock, holders of shares of Series B
Preferred Stock are entitled to receive, when and as declared by the Board of
Directors, out of funds legally available for the payment of distributions,
cumulative preferential cash distributions in an amount per share of Series B
Preferred Stock equal to the greater of (i) $2.125 per annum or (ii) the
distributions on the number of shares of Common Stock, or fraction thereof, into
which shares of Series B Preferred Stock are convertible. The amount referred to
in clause (ii) above shall equal the number of shares of Common Stock, or
fraction thereof, into which shares of Series B Preferred Stock are convertible,
multiplied by the quarterly distributions declared or paid with respect to a
share of Common Stock on or most recently prior to the applicable Series B
Preferred Stock distribution payment date. Distributions on the Series B
Preferred Stock are cumulative from the date of original issuance and are
payable quarterly in arrears on the fifteenth day of each May, August, November
and February, or, if such day is not a business day, on the next succeeding
business day. The shares of Series B Preferred Stock are not entitled to the
benefit of any sinking fund. On and after March 31, 1999, we, at our option, may
redeem the shares of Series B Preferred Stock for cash, in whole or in part,
initially at a redemption price of $27.125 per share and thereafter at prices
declining ratably to $25.00 per share on and after March 31, 2004, plus in each
case accrued and unpaid distributions, if any, to the redemption date. Upon any
voluntary or involuntary liquidation, dissolution or winding up of Prime Retail,
Inc., subject to the prior rights of any series of capital stock ranking senior
to Series B Preferred Stock, the holders of shares of Series B Preferred Stock
are entitled to a liquidation preference of $25.00 per share, plus accrued and
unpaid distributions to the date of payment, before any distribution of assets
is made to holders of shares of Series C Preferred Stock or Common Stock and any
other class or series of our shares ranking junior to the Series B Preferred
Stock as to liquidation rights. The Series B Preferred Stock is listed on the
NYSE under the trading symbol "PRT.prb."
 
    Shares of Series B Preferred Stock are convertible at any time, at the
option of the holder, unless previously redeemed, into shares of Common Stock at
a conversion price of $20.90 per share of Common Stock, subject to adjustment.
Shares of Series B Preferred Stock will be deemed to have been converted
immediately prior to the close of business on the date such shares are
surrendered for conversion and notice of election to convert the same is
received by us. Upon conversion, no adjustment or prepayment will be made for
distributions or dividends. No fractional shares of Common Stock will be issued
upon conversion and, if the conversion results in a fractional interest, an
amount will be paid in cash equal to the value of such fractional interest based
on the market price of Common Stock on the last trading day prior to the date of
conversion.
 
                                       11
<PAGE>
    SERIES C PREFERRED STOCK.  The Series C Preferred Stock ranks senior to
Common Stock with respect to dividend rights and distributions upon liquidation,
dissolution or winding up. Subject to the preferential rights of Series A
Preferred Stock and Series B Preferred Stock, holders of the shares of Series C
Preferred Stock are entitled to receive, when and as declared by the Board of
Directors, out of funds legally available for the payment of distributions,
cumulative preferential cash distributions in an amount per share of Series C
Preferred Stock equal to the greater of (i) $1.18 per annum or (ii) the regular
cash distributions on the number of shares of Common Stock, or fraction thereof,
into which shares of Series C Preferred Stock are convertible. The amount
referred to in clause (ii) above shall equal the number of shares of Common
Stock, or fraction thereof, into which shares of Series C Preferred Stock are
convertible, multiplied by the most current quarterly distributions on a share
of Common Stock on or before the applicable Series C Preferred Stock
distribution payment date. Distributions on the Series C Preferred Stock are
cumulative from the date of original issuance and are payable quarterly, when,
and as declared by the Board of Directors, in arrears on the distribution
payment date. The shares of Series C Preferred Stock are not entitled to the
benefit of any sinking fund. On and after August 8, 2007, we, at our option, may
redeem the shares of Series C Preferred Stock for cash, in whole at any time or
from time to time in part out of funds legally available therefor at a
redemption price of $13.75 per share, plus in each case accrued and unpaid
distributions, if any, to the redemption date. Upon any voluntary or involuntary
liquidation, dissolution or winding up of Prime Retail, Inc., subject to the
prior rights of any series of capital stock ranking senior to Series C Preferred
Stock, the holders of shares of Series C Preferred Stock are entitled to a
liquidation preference of $13.75 per share, plus accrued and unpaid
distributions to the date of payment, before any distribution of assets is made
to holders of shares of Common Stock and any other class or series of our shares
ranking junior to the Series C Preferred Stock as to liquidation rights.
 
    The shares of Series C Preferred Stock are convertible at any time, at the
option of the holder, unless previously redeemed, into shares of Common Stock at
a conversion price of $13.75 per share of Common Stock, subject to adjustment.
Shares of Series C Preferred Stock will be deemed to have been converted
immediately prior to the close of business on the date such shares are
surrendered for conversion and notice of election to convert the same is
received by us. Upon conversion, no adjustment or prepayment will be made for
distributions or dividends. No fractional shares of Common Stock will be issued
upon conversion and, if the conversion results in a fractional interest, an
amount will be paid in cash equal to the value of such fractional interest based
on the market price of Common Stock on the last trading day prior to the date of
conversion.
 
    The preceding summary of the terms of the Series A Preferred Stock, Series B
Preferred Stock and Series C Preferred Stock is not complete and is qualified in
its entirety by reference to the pertinent sections of our Charter.
 
ISSUANCE OF ADDITIONAL PREFERRED STOCK
 
    The following description of the Preferred Stock sets forth certain general
terms and provisions of the Preferred Stock to which any prospectus supplement
may relate. The statements below describing the Preferred Stock are in all
respects subject to and qualified in their entirety by reference to the
applicable provisions of our Charter and our Amended and Restated Bylaws (the
"Bylaws") and any applicable amendment to our Charter designating terms of a
series of Preferred Stock (a "Designating Amendment").
 
    The rights, preferences, privileges and restrictions of the Preferred Stock
of each series will be fixed by the Designating Amendment relating to such
series. A prospectus supplement, relating to each series, will specify the terms
of the Preferred Stock as follows:
 
    (1) The title and stated value of such Preferred Stock;
 
    (2) The number of shares of such Preferred Stock offered, the liquidation
        preference per share and the offering price of such Preferred Stock;
 
                                       12
<PAGE>
    (3) The dividend rate(s), period(s) and/or payment date(s) or method(s) of
        calculation thereof applicable to such Preferred Stock;
 
    (4) The date from which dividends on such Preferred Stock shall accumulate,
        if applicable;
 
    (5) The procedures for any auction and remarketing, if any, for such
        Preferred Stock;
 
    (6) The provision for a sinking fund, if any, for such Preferred Stock;
 
    (7) The provision for redemption, if applicable, of such Preferred Stock;
 
    (8) Any listing of such Preferred Stock on any securities exchange;
 
    (9) The terms and conditions, if applicable, upon which such Preferred Stock
        will be convertible into Common Stock, including the conversion price
        (or manner of calculation thereof) and conversion period;
 
   (10) Whether interests in such Preferred Stock will be represented by
        Depository Shares;
 
   (11) Any other specific terms, preferences, rights, limitations or
        restrictions of such Preferred Stock;
 
   (12) A discussion of certain material federal income tax considerations
        applicable to such Preferred Stock;
 
   (13) The relative ranking and preferences of such Preferred Stock as to
        dividend rights and rights upon liquidation, dissolution or winding up
        of our affairs;
 
   (14) Any limitation on issuance of any series of Preferred Stock ranking
        senior to or on a parity with such series of Preferred Stock as to
        dividend rights and rights upon liquidation, dissolution or winding up
        of our affairs; and
 
   (15) Any limitations on direct or beneficial ownership and restrictions on
        transfer of such Preferred Stock, in each case as may be appropriate to
        preserve our status as a REIT.
 
                        DESCRIPTION OF DEPOSITORY SHARES
 
GENERAL
 
    We may issue receipts ("Depository Receipts") for shares of Preferred Stock
represented by depository shares ("Depository Shares") each of which will
represent a fractional interest of a share of a particular series of Preferred
Stock, as specified in a supplement to this prospectus. Shares of Preferred
Stock of each series represented by Depository Shares will be deposited under a
separate deposit agreement (each, a "Deposit Agreement") among Prime Retail,
Inc., the depository named therein (a "Preferred Stock Depository") and the
holders from time to time of the Depository Receipts. Subject to the terms of
the applicable Deposit Agreement, each owner of a Depository Receipt will be
entitled, in proportion to the fractional interest of a share of a particular
series of Preferred Stock represented by the Depository Shares evidenced by such
Depository Receipt, to all the rights and preferences of the Preferred Stock
represented by such Depository Shares (including dividend, voting, conversion,
redemption and liquidation rights).
 
    The Depository Shares will be evidenced by Depository Receipts issued
pursuant to the applicable Deposit Agreement. Immediately following our issuance
and delivery of the Preferred Stock to a Preferred Stock Depository, we will
cause such Preferred Stock Depository to issue, on our behalf, the Depository
Receipts. Copies of the applicable form of Deposit Agreement and Depository
Receipt may be obtained from us upon request, and the statements made hereunder
relating to Deposit Agreements and the Depository Receipts to be issued
thereunder are summaries of certain anticipated provisions thereof and do not
purport to be complete and are subject to, and qualified in their entirety by
reference to, all of the provisions of the applicable Deposit Agreement and
related Depository Receipts.
 
                                       13
<PAGE>
DIVIDENDS AND OTHER DISTRIBUTIONS
 
    A Preferred Stock Depository will be required to distribute all cash
dividends or other cash distributions received in respect of the applicable
Preferred Stock to the record holders of Depository Receipts evidencing the
related Depository Shares in proportion to the number of such Depository
Receipts owned by such holders, subject to certain obligations of holders to
file proofs, certificates and other information and to pay certain charges and
expenses to such Preferred Stock Depository.
 
    In the event of a distribution other than in cash, a Preferred Stock
Depository will be required to distribute property received by it to the record
holders of Depository Receipts entitled thereto, subject to certain obligations
of holders to file proofs, certificates and other information and to pay certain
charges and expenses to such Preferred Stock Depository, unless such Preferred
Stock Depository determines that it is not feasible to make such distribution,
in which case such Preferred Stock Depository may, with our approval, sell such
property and distribute the net proceeds from such sale to such holders.
 
    No distribution will be made in respect of any Depository Share to the
extent that it represents any Preferred Stock which has been converted or
exchanged.
 
WITHDRAWAL OF SHARES
 
    Upon surrender of the Depository Receipts at the corporate trust office of
the applicable Preferred Stock Depository (unless the related Depository Shares
have previously been called for redemption or converted), the holders thereof
will be entitled to delivery at such office, to or upon each such holder's
order, of the number of whole or fractional shares of the applicable Preferred
Stock and any money or other property represented by the Depository Shares
evidenced by such Depository Receipts. Holders of Depository Receipts will be
entitled to receive whole or fractional shares of the related Preferred Stock on
the basis of the proportion of Preferred Stock represented by each Depository
Share as specified in a supplement to this prospectus, but holders of such
shares of Preferred Stock will not thereafter be entitled to receive Depository
Shares therefor. If the Depository Receipts delivered by the holder evidence a
number of Depository Shares in excess of the number of Depository Shares
representing the number of shares of Preferred Stock to be withdrawn, the
applicable Preferred Stock Depository will be required to deliver to such holder
at the same time a new Depository Receipt evidencing such excess number of
Depository Shares.
 
REDEMPTION OF DEPOSITORY SHARES
 
    Whenever we redeem shares of Preferred Stock held by a Preferred Stock
Depository, such Preferred Stock Depository will be required to redeem as of the
same redemption date the number of Depository Shares representing shares of the
Preferred Stock so redeemed, provided we shall have paid in full to such
Preferred Stock Depository the redemption price of the Preferred Stock to be
redeemed plus an amount equal to any accrued and unpaid dividends thereon to the
date fixed for redemption. The redemption price per Depository Share will be
equal to the redemption price and any other amounts per share payable with
respect to the Preferred Stock. If fewer than all the Depository Shares are to
be redeemed, the Depository Shares to be redeemed will be selected pro rata (as
nearly as may be practicable without creating fractional Depository Shares) or
by any other equitable method determined by us that preserves our REIT status.
 
VOTING OF THE UNDERLYING PREFERRED STOCK
 
    Upon receipt of notice of any meeting at which the holders of the applicable
Preferred Stock are entitled to vote, a Preferred Stock Depository will be
required to mail the information contained in such notice of meeting to the
record holders of the Depository Receipts evidencing the Depository Shares which
represent such Preferred Stock. Each record holder of Depository Receipts
evidencing Depository Shares on the record date (which will be the same date as
the record date for the Preferred Stock) will be entitled to instruct such
Preferred Stock Depository as to the exercise of the voting rights pertaining to
the amount
 
                                       14
<PAGE>
of Preferred Stock represented by such holder's Depository Shares. Such
Preferred Stock Depository will be required to vote the amount of Preferred
Stock represented by such Depository Shares in accordance with such
instructions, and we will agree to take all reasonable action which may be
deemed necessary by such Preferred Stock Depository in order to enable such
Preferred Stock Depository to do so. Such Preferred Stock Depository will be
required to abstain from voting the amount of Preferred Stock represented by
such Depository Shares to the extent it does not receive specific instructions
from the holders of Depository Receipts evidencing such Depository Shares. A
Preferred Stock Depository will not be responsible for any failure to carry out
any instruction to vote, or for the manner or effect of any such vote made, as
long as any such action or non-action is in good faith and does not result from
negligence or willful misconduct of such Preferred Stock Depository.
 
LIQUIDATION PREFERENCE
 
    In the event of the liquidation, dissolution or winding up of Prime Retail,
Inc., whether voluntary or involuntary, the holders of each Depository Receipt
will be entitled to the fraction of the liquidation preference accorded each
share of Preferred Stock represented by the Depository Share evidenced by such
Depository Receipt, as set forth in a supplement to this prospectus.
 
CONVERSION OF PREFERRED STOCK
 
    The Depository Shares, as such, will not be convertible into shares of
Common Stock or any other of our securities or property, except in connection
with certain conversions in connection with the preservation of our status as a
REIT. See "Restrictions on Ownership and Transfer of Capital Stock."
Nevertheless, if so specified in a supplement to this prospectus relating to an
offering of Depository Shares, the Depository Receipts may be surrendered by
holders thereof to the applicable Preferred Stock Depository with written
instructions to such Preferred Stock Depository to instruct us to cause
conversion of the Preferred Stock represented by the Depository Shares evidenced
by such Depository Receipts into whole shares of Common Stock, other shares of
our Preferred Stock or other shares of stock, and we will agree that upon
receipt of such instructions and any amounts payable in respect thereof, it will
cause the conversion thereof utilizing the same procedures as those provided for
delivery of Preferred Stock to effect such conversion. If the Depository Shares
evidenced by a Depository Receipt are to be converted in part only, a new
Depository Receipt or Receipts will be issued for any Depository Shares not to
be converted. No fractional shares of Common Stock will be issued upon
conversion, and if such conversion will result in a fractional share being
issued, an amount will be paid in cash by the Company equal to the value of the
fractional interest based upon the closing price of the Common Stock on the last
business day prior to the conversion.
 
AMENDMENT AND TERMINATION OF THE DEPOSIT AGREEMENT
 
    Any form of Depository Receipt evidencing Depository Shares which will
represent Preferred Stock and any provision of a Deposit Agreement will be
permitted at any time to be amended by agreement between Prime Retail, Inc. and
the applicable Preferred Stock Depository. However, any amendment that
materially and adversely alters the rights of the holders of Depository Receipts
or that would be materially and adversely inconsistent with the rights granted
to the holders of the related Preferred Stock will not be effective unless such
amendment has been approved by the existing holders of at least two-thirds of
the applicable Depository Shares evidenced by the applicable Depository Receipts
then outstanding. No amendment shall impair the right, subject to certain
anticipated exceptions in the Deposit Agreements, of any holder of Depository
Receipts to surrender any Depository Receipt with instructions to deliver to the
holder the related Preferred Stock and all money and other property, if any,
represented thereby, except in order to comply with law. Every holder of an
outstanding Depository Receipt at the time any such amendment becomes effective
shall be deemed, by continuing to hold such Depository Receipt, to consent and
agree to such amendment and to be bound by the applicable Deposit Agreement as
amended thereby.
 
                                       15
<PAGE>
    A Deposit Agreement will be permitted to be terminated by us upon not less
than 30 days' prior written notice to the applicable Preferred Stock Depository
if (i) such termination is necessary to preserve our status as a REIT or (ii) a
majority of each series of Preferred Stock affected by such termination consents
to such termination, whereupon such Preferred Stock Depository will be required
to deliver or make available to each holder of Depository Receipts, upon
surrender of the Depository Receipts held by such holder, such number of whole
or fractional shares of Preferred Stock as are represented by the Depository
Shares evidenced by such Depository Receipts together with any other property
held by such Preferred Stock Depository with respect to such Depository
Receipts. We will agree that if a Deposit Agreement is terminated to preserve
our status as a REIT, then we will use our best efforts to list the Preferred
Stock issued upon surrender of the related Depository Shares on a national
securities exchange. In addition, a Deposit Agreement will automatically
terminate if (i) all outstanding Depository Shares thereunder shall have been
redeemed, (ii) there shall have been a final distribution in respect of the
related Preferred Stock in connection with any liquidation, dissolution or
winding up of Prime Retail, Inc. and such distribution shall have been
distributed to the holders of Depository Receipts evidencing the Depository
Shares representing such Preferred Stock or (iii) each share of the related
Preferred Stock shall have been converted into our stock not so represented by
Depository Shares.
 
CHARGES OF PREFERRED STOCK DEPOSITORY
 
    We will pay all transfer and other taxes and governmental charges arising
solely from the existence of a Deposit Agreement. In addition, we will pay the
fees and expenses of a Preferred Stock Depository in connection with the
performance of its duties under a Deposit Agreement. However, holders of
Depository Receipts will pay the fees and expenses of a Preferred Stock
Depository for any duties requested by such holders to be performed which are
outside of those expressly provided for in the applicable Deposit Agreement.
 
RESIGNATION AND REMOVAL OF PREFERRED STOCK DEPOSITORY
 
    A Preferred Stock Depository will be permitted to resign at any time by
delivering to us notice of its election to do so, and we will be permitted at
any time to remove a Preferred Stock Depository, any such resignation or removal
to take effect upon the appointment of a successor Preferred Stock Depository. A
successor Preferred Stock Depository will be required to be appointed within 60
days after delivery of the notice of resignation or removal and will be required
to be a bank or trust company having its principal office in the United States
and having a combined capital and surplus of at least $50,000,000.
 
                                       16
<PAGE>
MISCELLANEOUS
 
    A Preferred Stock Depository will be required to forward to holders of
Depository Receipts any reports and communications from us which are received by
such Preferred Stock Depository with respect to the related Preferred Stock.
 
    Neither a Preferred Stock Depository nor we will be liable if it is
prevented from or delayed in, by law or any circumstances beyond its control,
performing its obligations under a Deposit Agreement. Our obligations and a
Preferred Stock Depository under a Deposit Agreement will be limited to
performing their duties thereunder in good faith and without negligence (in the
case of any action or inaction in the voting of Preferred Stock represented by
the applicable Depository Shares), gross negligence or willful misconduct, and
neither we nor any applicable Preferred Stock Depository will be obligated to
prosecute or defend any legal proceeding in respect of any Depository Receipts,
Depository Shares or shares of Preferred Stock represented thereby unless
satisfactory indemnity is furnished. We and any Preferred Stock Depository will
be permitted to rely on written advice of counsel or accountants, or information
provided by persons presenting shares of Preferred Stock represented thereby for
deposit, holders of Depository Receipts or other persons believed in good faith
to be competent to give such information, and on documents believed in good
faith to be genuine and signed by a proper party.
 
    In the event a Preferred Stock Depository shall receive conflicting claims,
requests or instructions from any holders of Depository Receipts, on the one
hand, and us, on the other hand, such Preferred Stock Depository shall be
entitled to act on such claims, requests or instructions received from us.
 
                    DESCRIPTION OF THE WARRANTS TO PURCHASE
                        COMMON STOCK OR PREFERRED STOCK
 
    We have no warrants to purchase shares of Common Stock ("Common Stock
Warrants") and warrants to purchase shares of Preferred Stock ("Preferred Stock
Warrants" and together with Common Stock Warrants, the "Warrants") outstanding.
We may issue Warrants for the purchase of Preferred Stock or Common Stock.
Warrants may be issued independently or together with any other securities
offered by any supplement to this prospectus and may be attached to or separate
from such offered securities. Each series of Warrants will be issued under a
separate warrant agreement (each, a "Warrant Agreement") to be entered into
between Prime Retail, Inc. and a warrant agent specified in a supplement to this
prospectus (the "Warrant Agent"). The Warrant Agent will act solely as our agent
in connection with the Warrants of such series and will not assume any
obligation or relationship of agency or trust for or with any provisions of the
Warrants offered hereby. Further terms of the Warrants and the applicable
Warrant Agreements will be set forth in the a supplement to this prospectus
relating to the issuance of any Warrants.
 
    A supplement to this prospectus will describe the terms of the Warrants in
respect of which this prospectus is being delivered including, where applicable,
the following:
 
    (1) The title of such Warrants;
 
    (2) The aggregate number of such Warrants;
 
    (3) The price or prices at which such Warrants will be issued;
 
    (4) The designation, terms and number of shares of Preferred Stock or Common
       Stock purchasable upon exercise of such Warrants;
 
    (5) The designation and terms of the offered securities, if any, with which
       such Warrants are issued and the number of such Warrants issued with each
       such offered security;
 
    (6) The date, if any, on and after which such Warrants and the related
       Preferred Stock or Common Stock will be separately transferable;
 
                                       17
<PAGE>
    (7) The price at which each share of Preferred Stock or Common Stock
       purchasable upon exercise of such Warrants may be purchased;
 
    (8) The date on which the right to exercise such Warrants shall commence and
       the date on which such right shall expire;
 
    (9) The minimum or maximum amount of such Warrants which may be exercised at
       any one time;
 
    (10) Information with respect to book-entry procedures, if any;
 
    (11) A discussion of certain Federal income tax considerations; and
 
    (12) Any other terms of such Warrants, including terms, procedures and
       limitations relating to the exchange and exercise of such Warrants. The
       exercise of any such Warrants will be subject to and limited by the
       transfer and ownership restrictions in our Charter. See "Restrictions on
       Ownership and Transfer of Capital Stock."
 
            RESTRICTIONS ON OWNERSHIP AND TRANSFER OF CAPITAL STOCK
 
    Our Charter contains restrictions on the number of shares of our capital
stock that shareholders may own. For us to continue to qualify as a REIT under
the Internal Revenue Code of 1986, as amended (the "Code"), not more than 50% in
value of our outstanding capital stock may be owned, directly or constructively
under the applicable attribution rules of the Code, by five or fewer individuals
at any time during the last half of a taxable year other than the first taxable
year for which the election to be taxed as a REIT has been made. Our capital
stock also must be beneficially owned by 100 or more persons during at least 335
days of a taxable year of 12 months or during a proportionate part of a shorter
taxable year. Our Board of Directors may, subject to the receipt of
representations as required by our Charter and a ruling from the IRS or an
opinion of counsel satisfactory to the Board of Directors, waive the ownership
restrictions with respect to a holder if such waiver will not jeopardize our
status as a REIT.
 
    In general, no holder may own, either directly or constructively under the
applicable attribution rules of the Code, more than 9.9% of the outstanding
shares of our Common Stock (the "Common Ownership Limit"). The Common Ownership
Limit will not apply, however, to holders who acquire shares of Common Stock in
excess of the Common Ownership Limit as a result of the conversion of shares of
Series B Preferred Stock; provided, however, that no such holder may own an
interest in any of our tenants, which exceeds, in the case of a tenant that is a
corporation, 9.9% of the total voting stock of such tenant or 9.9% of the total
number of shares of all classes of stock of such tenant, or, in the case of a
tenant that is not a corporation, a 9.9% interest in the assets or net profits
of such tenant.
 
    In general, no holder may acquire, either directly or constructively under
the applicable attribution rules of the Code, or beneficially own shares of
Series B Preferred Stock if, as a result of such acquisition or beneficial
ownership, such holder beneficially owns shares of our capital stock in excess
of 9.9% of the value of our outstanding capital stock in excess of 9.9% of the
value of our outstanding capital stock (the "Series B Preferred Ownership
Limit"). There are no restrictions on the ability of a holder of shares of
Series B Preferred Stock to convert such shares into Common Stock even if, as a
result of such conversion, the holder will own shares of Common Stock in excess
of the Common Ownership Limit. However, no person may acquire or own shares of
Series B Preferred Stock or Common Stock to the extent that the aggregate of the
shares of Common Stock owned by such holder and issuable to such holder upon
conversion of all of the shares of Series B Preferred Stock then owned by such
holder, assuming that all of the outstanding shares of Series B Preferred Stock
were converted into shares of Common Stock at such time, exceeds 9.9% of the
total shares of Common Stock on a fully diluted basis. In making such
calculation, we take into account shares of Common Stock outstanding and
issuable upon conversion of all of the outstanding shares of Series B Preferred
Stock but excluding shares of Common Stock issuable in exchange for common units
of Prime Retail, L.P.
 
                                       18
<PAGE>
    In addition, no holder may own or acquire, either directly or constructively
under the applicable attribution rules of the Code, any shares of any class of
our capital stock if such ownership or acquisition (i) would cause more than 50%
in value of our outstanding stock to be owned, either directly or constructively
under the applicable attribution rules of the Code, by five or fewer
individuals, (ii) would result in our shares being beneficially owned by less
than 100 persons, or (iii) would otherwise result in our failing to qualify as a
REIT.
 
    If any shareholder attempts to transfer our capital stock to a person and
either the transfer would result in our failing to qualify as a REIT, or such
transfer would cause the transferee to hold capital stock in excess of an
applicable ownership limit, such transfer will be voided. In addition, the
shareholder attempting to make such a transfer will be deemed to have
transferred such capital stock to us in exchange for shares of Excess Stock of
the same class or classes. In addition, if any person owns, either directly or
under the applicable attribution rules of the Code, shares of our capital stock
in excess of an applicable ownership limit, such person will be deemed to have
exchanged the shares of capital stock that cause the applicable ownership limit
to be exceeded for an equal number of shares of Excess Stock of the appropriate
class. A person who holds shares of Excess Stock will not be entitled to vote
such shares and will not be entitled to receive any dividends or distributions
with respect to such shares. Any dividend or distribution paid on shares of
capital stock prior to our discovery that such shares have been exchanged for
shares of Excess Stock shall be repaid us upon our demand, and any dividend or
distribution declared but unpaid shall be rescinded.
 
    Any person who holds shares of Excess Stock shall have the right to
designate a transferee of such shares so long as consideration received for
designating such transferee does not exceed a price (the "Limitation Price")
that is equal to the lesser of (i) in the case of a deemed exchange for shares
of Excess Stock resulting from proposed transfer, the price paid for the shares
in such transfer or, in the case of a deemed exchange for shares of Excess Stock
resulting from some other event, the fair market value, on the date of the
deemed exchange, of the shares deemed exchanged, or (ii) the fair market value
of the shares for which such shares of Excess Stock will be deemed to be
exchanged on the date of the designation of the transferee. Shares of Excess
Stock so transferred will automatically be deemed reexchanged for the
appropriate shares of capital stock. In addition, we will have the right to
purchase shares of Excess Stock for a period of 90 days at a price equal to the
Limitation Price.
 
    An automatic redemption will occur to prevent any violation of the Series B
Preferred Ownership Limit that would otherwise result from a conversion of
shares of Series B Preferred Stock, or our redemption or open market purchase of
shares of Series B Preferred Stock (each a "Company Induced Event"). If the
Company Induced Event involves a proposed acquisition of shares of Series B
Preferred Stock, the redemption price of each share of Series B Preferred Stock
redeemed will equal the price per share paid for the shares of Series B
Preferred Stock. If the Company Induced Event does not involve an acquisition in
which the full value was paid for such shares of Series B Preferred Stock, the
redemption price will equal the fair market value of the Series B Preferred
Stock. Our Board of Directors shall have authority to waive the requirements
that shares of Excess Stock be issued or that we redeem shares of Series B
Preferred Stock as a result of a Company Induced Event if such issuance or
redemption would in the opinion of nationally recognized tax counsel jeopardize
our status as a REIT for federal income tax purposes.
 
    If the foregoing transfer restrictions are determined to be void or invalid
by virtue of any legal decisions, statute, rule or regulation, then the intended
transferee of any shares of Excess Stock may be deemed, at our option, to have
acted as an agent on our behalf in acquiring such shares of Excess Stock and to
hold such shares of Excess Stock on our behalf.
 
    All certificates representing shares of capital stock will bear a legend
referring to the restrictions described above.
 
                                       19
<PAGE>
    Every owner of more than 5%, or such lower percentage as required by the
Code or regulations thereunder, of the issued and outstanding shares of Series A
Preferred Stock, Series B Preferred Stock or Common Stock must file a written
notice with us containing the information specified in our Charter no later than
January 30 of each year. Furthermore, each shareholder shall upon demand be
required to disclose to us in writing such information as we may request in
order to determine the effect of such shareholder's direct, indirect and
constructive ownership of such capital stock on our status as a REIT.
 
    The foregoing ownership limitations may have the effect of precluding
acquisition of our control without the consent of our Board of Directors, and
consequently, shareholders may be unable to realize a premium for their shares
over the then prevailing market price which is customarily associated with such
acquisitions.
 
                              PLAN OF DISTRIBUTION
 
    We may sell securities offered by means of this prospectus to one or more
underwriters for public offering and sale by them or may sell such securities to
investors directly or through agents. Any such underwriter or agent involved in
the offer and sale of such securities will be named in the prospectus supplement
relating to the securities.
 
    The distribution of securities offered by means of this prospectus may be
effected from time to time in one or more transactions at a fixed price or
prices, which may be changed, or at market prices prevailing at the time of
sale, at prices related to such prevailing market prices or at negotiated
prices.
 
    In connection with the sale of securities offered by means of this
prospectus, underwriters may receive compensation from us or from purchasers of
such securities, for whom they may act as agents, in the form of discounts,
concessions, or commissions. Underwriters may sell securities offered by means
of this prospectus to or through dealers, and such dealers may receive
compensation in the form of discounts, concessions, or commissions from the
underwriters and/or commissions from the purchasers for whom they may act as
agents. Underwriters, dealers, and agents that participate in the distribution
of offered securities may be deemed to be underwriters, and any discounts or
commissions they receive from us, and any profit on the resale of offered
securities they realize may be deemed to be underwriting discounts and
commissions, under the Securities Act of 1933, as amended. Any such underwriter
or agent will be identified, and any such compensation received from us will be
described in a supplement to this prospectus.
 
    If so indicated in a prospectus supplement, each series of securities
offered by this prospectus will be a new issue with no established trading
market, other than the Common Stock, the Series A Preferred Stock or the Series
B Preferred Stock which are listed on the New York Stock Exchange under the
trading symbols "PRT", "PRT.pra" and "PRT.pb", respectively, subject to official
notice of issuance. We may elect to list any series of Preferred Stock,
Depository Shares or Warrants on an exchange, but we are not obligated to do so.
It is possible that one or more underwriters may make a market in a series of
offered securities, but will not be obligated to do so and may discontinue any
market making at any time without notice. Therefore, no assurance can be given
as to the liquidity of the trading market for any securities offered by this
prospectus.
 
    Under agreements we may enter into, underwriters, dealers, and agents who
participate in the distribution of securities offered by this prospectus may be
entitled to indemnification by us against certain liabilities, including
liabilities under the Securities Act of 1933, as amended.
 
    Underwriters, dealers and agents may engage in transactions with, or perform
services for, or be customers of, us in the ordinary course of business.
 
    If so indicated in a supplement to this prospectus, we will authorize
underwriters or other persons acting as our agents to solicit offers by
institutions to purchase securities offered by this prospectus from us pursuant
to contracts providing for payment and delivery on a future date. Institutions
with which such
 
                                       20
<PAGE>
contracts may be made include commercial and savings banks, insurance companies,
pension funds, investment companies, educational and charitable institutions and
others, but in all cases such institutions must be approved by us. The
obligations of any purchaser under any such contract will be subject to the
condition that the purchase of securities offered by this prospectus shall not
at the time of delivery be prohibited under the laws of the jurisdiction to
which such purchaser is subject. The underwriters and such other agents will not
have any responsibility in respect of the validity or performance of such
contracts.
 
                                 LEGAL OPINIONS
 
    The legality of securities offered by means of this prospectus will be
passed upon for us by Winston & Strawn, Chicago, Illinois. The Honorable James
R. Thompson, a partner in Winston & Strawn, is one of our directors.
 
                                    EXPERTS
 
    Ernst & Young LLP, independent auditors, have audited the consolidated
financial statements of Prime Retail, Inc. and Horizon Group, Inc., the combined
financial statements of Horizon Group Properties, Inc. and the statements of
revenue and certain expenses of Prime Transferred Properties for the year ended
December 31, 1997, as set forth in their reports, which are incorporated in this
prospectus by reference. Such consolidated and combined financial statements and
statements of revenue and certain expenses are incorporated by reference in
reliance on their reports, given on their authority as experts in accounting and
auditing.
 
                                       21
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
<TABLE>
<S>                                                                              <C>
Registration Fee...............................................................  $111,200.00
Printing and Engraving Expenses................................................   50,000.00
Legal Fees and Expenses........................................................   75,000.00
Accounting Fees and Expenses...................................................   20,000.00
Blue Sky Fees and Expenses.....................................................   15,000.00
Miscellaneous..................................................................   28,800.00
                                                                                 ----------
  Total........................................................................  $300,000.00
                                                                                 ----------
                                                                                 ----------
</TABLE>
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
    The undersigned Registrant is a Maryland corporation. The Registrant's
officers and directors are and will be indemnified under Maryland law, its
Charter, and the partnership agreement of Prime Retail, L.P. against certain
liabilities. The Registrant's Charter provides that the Registrant shall
indemnify, to the fullest extent permitted by Maryland law, as applicable from
time to time, all persons who at any time were or are directors or officers of
the Registrant for any threatened, pending or completed action, suit or
proceeding (whether civil, criminal, administrative or investigative) relating
to any action alleged to have been taken or omitted in such capacity as a
director or an officer. The Registrant shall pay or reimburse all reasonable
expenses incurred by a present or former director or officer of the Registrant
in connection with any threatened, pending or completed action, suit or
proceeding (whether civil, criminal, administrative or investigative) in which
the present or former director or officer is a party, in advance of the final
disposition of the proceeding, to the fullest extent permitted by, and in
accordance with the applicable requirements of, Maryland law, as applicable from
time to time. The Registrant may indemnify any other persons permitted but not
required to be indemnified by Maryland law, as applicable from time to time, if
and to the extent indemnification is authorized and determined to be
appropriate, in each case in accordance with applicable law, by the Board of
Directors, the majority of the shareholders of the Registrant entitled to vote
thereon or special legal counsel appointed by the Board of Directors. The
Registrant's Charter also provides that no amendment of such Charter or repeal
of any of its provisions shall limit or eliminate any of the above benefits
provided to directors or officers in respect of any act or omission that
occurred prior to such amendment or repeal.
 
    The Bylaws of the Registrant also provide for indemnification of the
Registrant's officers and directors to the same extent that indemnification is
provided to officers and directors of the Registrant in its Charter.
 
    The MGCL permits a corporation to indemnify its present and former directors
and officers, among others, against judgments, penalties, fines, settlements and
reasonable expenses actually incurred by them in connection with any proceeding
to which they may be made a party by reason of their service in those or other
capacities unless it is established that (a) the act or omission of the director
or officer was material to the matter giving rise to the proceeding and (i) was
committed in bad faith or (ii) was the result of active and deliberate
dishonesty, (b) the director or officer actually received an improper personal
benefit in money, property or services or (c) in the case of any criminal
proceeding, the director or officer had reasonable cause to believe that the act
or omission was unlawful. The foregoing limits on indemnification are expressly
set forth in the Registrant's Bylaws. However, under the MGCL, a Maryland
corporation may not indemnify for an adverse judgment in a suit by or in the
right of the corporation or for a judgment of liability on the basis that a
personal benefit was improperly received, unless, in either case, a court orders
indemnification and then only for expenses. In addition, the MGCL permits a
corporation to advance
 
                                      II-1
<PAGE>
reasonable expenses to a director or officer upon the corporation's receipt of
(a) a written affirmation by the director or officer of his good faith belief
that he has met the standard of conduct necessary for indemnification by the
corporation and (b) written statement by or on his behalf to repay the amount
paid or reimbursed by the corporation if it shall ultimately be determined that
the standard of conduct was not met.
 
    The Registrant has entered into indemnification agreements with each of its
directors and executive officers. The indemnification agreements require, among
other things, that the Registrant indemnify its directors and executive officers
to the fullest extent permitted by law and advance to the directors and
executive officers all related expenses, subject tor reimbursement if it is
subsequently determined that indemnification is not permitted. Under these
agreements, the Registrant must also indemnify and advance all expenses incurred
by directors and executive officers seeking to enforce their rights under the
indemnification agreements and may cover directors and executive officers under
the Registrant's directors and officers' liability insurance. Although the form
of indemnification agreement offers substantially the same scope of coverage
afforded by law, as a traditional form of contract it may provide greater
assurance to directors and officers that indemnification will be available.
 
ITEM 16. EXHIBITS.
 
<TABLE>
<C>        <S>
  1.1  --  Form of Underwriting Agreement for Equity Securities(1)
 
  4.1  --  Form of Common Stock Warrant Agreement(1)
 
  4.2  --  Form of Preferred Stock Warrant Agreement(1)
 
  4.3  --  Form of Articles of Restatement for the Preferred Stock(1)
 
  4.4  --  Form of Preferred Stock Certificate(1)
 
  4.5  --  Form of Deposit Agreement(1)
 
  5.1  --  Opinion of Winston & Strawn(2)
 
 12.1  --  Computation of Ratios of Earnings to Combined Fixed Charges and Preferred Stock
             Distributions and Dividends(2)
 
 23.1  --  Consent of Ernst & Young LLP--Baltimore(2)
 
 23.2  --  Consent of Ernst & Young LLP--Chicago(2)
 
 23.3  --  Consent of Winston & Strawn (included in Exhibit 5.1)
 
 24.1  --  Powers of Attorney (included on the signature page hereof)
</TABLE>
 
- ------------------------
 
(1) To be filed by amendment or incorporated by reference in connection with the
    offering of securities offered by this prospectus.
 
(2) Filed herewith.
 
ITEM 17. UNDERTAKINGS.
 
    The undersigned Registrant hereby undertakes that insofar as indemnification
for liabilities arising under the Securities Act of 1933 may be permitted to
directors, officers and controlling persons of the registrant pursuant to the
provisions described in Item 15 above, or otherwise, the Registrant has been
advised that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the Registrant of expenses incurred
or paid by a director, officer or controlling person of the Registrant in the
successful defense of any action,
 
                                      II-2
<PAGE>
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.
 
    The undersigned Registrant hereby further undertakes:
 
    (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:
 
        (i) To include any prospectus required by section 10(a)(3) of the
    Securities Act of 1933;
 
        (ii) To reflect in the prospectus any facts or events arising after the
    effective date of the registration statement (or the most recent
    post-effective amendment thereof) which, individually or in the aggregate,
    represent a fundamental change in the information set forth in the
    registration statement; notwithstanding the foregoing, any increase or
    decrease in volume of securities offered (if the total dollar value of
    securities offered would not exceed that which was registered) and any
    deviation from the low or high end of the estimated maximum offering range
    may be reflected in the form of prospectus filed with the SEC pursuant to
    Rule 424(b) (Section 230.424(b) of 17 C.F.R.) if, in the aggregate, the
    changes in volume and price represent no more than a 20% change in the
    maximum aggregate offering price set forth in the "Calculation of
    Registration Fee" table in the effective registration statement; and
 
        (iii) To include any material information with respect to the plan of
    distribution not previously disclosed in the registration statement or any
    material change to such information in the registration statement;
 
PROVIDED, HOWEVER, that paragraphs (1)(i) and (1)(ii) do not apply if the
registration statement is on Form S-3 or Form S-8, and the information required
to be included in a post-effective amendment by those paragraphs is contained in
periodic reports filed by the Registrant pursuant to section 13 or section 15(d)
of the Securities Exchange Act of 1934 that are incorporated by reference in the
registration statement.
 
    (2) That, for the purpose of determining any liability under the Securities
Act of 1933, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.
 
    (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.
 
    The undersigned Registrant hereby further undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's annual reports pursuant to section 13(a) or section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-3
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable ground to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Baltimore, State of Maryland, on this 7th day of
December, 1998.
 
<TABLE>
<S>                             <C>  <C>
                                PRIME RETAIL, INC.
 
                                By:            /s/ C. ALAN SCHROEDER
                                     -----------------------------------------
                                                 C. Alan Schroeder
                                     EXECUTIVE VICE PRESIDENT--GENERAL COUNSEL
                                                   AND SECRETARY
</TABLE>
 
    KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below, hereby constitutes and appoints each of Abraham Rosenthal, William H.
Carpenter, Jr., Robert P. Mulreaney and C. Alan Schroeder as his or her true and
lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution for him or her or in his or her name, place and stead, in any and
all capacities, to sign any and all amendments (including post-effective
amendments) to this Registration Statement, and to file the same, with all
exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto each said attorney-in-fact and
agent full power and authority to do and perform each and every act and thing
requisite and necessary in connection with such matters as fully to all intents
and purposes as he or she might or could do in person, hereby ratifying and
confirming all that each said attorney-in-fact and agent or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.
 
    Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated as of the 7th day of December, 1998.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                                   TITLE
- ------------------------------------------------------  ---------------------------------------------------------
 
<C>                                                     <S>
                /s/ MICHAEL W. RESCHKE
     -------------------------------------------        Chairman of the Board of Directors
                  Michael W. Reschke
 
                /s/ ABRAHAM ROSENTHAL
     -------------------------------------------        Chief Executive Officer (Principal Executive Officer) and
                  Abraham Rosenthal                       Director
 
            /s/ WILLIAM H. CARPENTER, JR.
     -------------------------------------------        President, Chief Operating Officer and Director
              William H. Carpenter, Jr.
</TABLE>
 
                                      II-4
<PAGE>
<TABLE>
<CAPTION>
                      SIGNATURE                                                   TITLE
- ------------------------------------------------------  ---------------------------------------------------------
 
<C>                                                     <S>
                 /s/ GLENN D. RESCHKE
     -------------------------------------------        Executive Vice President--Development and Acquisitions
                   Glenn D. Reschke                       and Director
 
               /s/ ROBERT P. MULREANEY                  Executive Vice President--Chief Financial Officer and
     -------------------------------------------          Treasurer (Principal Financial Officer and Principal
                 Robert P. Mulreaney                      Accounting Officer)
 
                /s/ WILLIAM P. DICKEY
     -------------------------------------------        Director
                  William P. Dickey
 
                /s/ TERENCE C. GOLDEN
     -------------------------------------------        Director
                  Terence C. Golden
 
                /s/ NORMAN PERLMUTTER
     -------------------------------------------        Director
                  Norman Perlmutter
 
     -------------------------------------------        Director
                 Robert D. Perlmutter
 
                /s/ KENNETH A. RANDALL
     -------------------------------------------        Director
                  Kenneth A. Randall
 
                   /s/ SHARON SHARP
     -------------------------------------------        Director
                     Sharon Sharp
 
                /s/ JAMES R. THOMPSON
     -------------------------------------------        Director
                  James R. Thompson
 
     -------------------------------------------        Director
                   Marvin S. Traub
</TABLE>
 
                                      II-5

<PAGE>
                                     EXHIBIT 5.1


                                   Winston & Strawn
                                 35 West Wacker Drive
                               Chicago, Illinois 60601

                                   December 7, 1998

Prime Retail, Inc.
100 East Pratt Street
Nineteenth Floor
Baltimore, Maryland 21202

Ladies and Gentlemen:

          We have acted as special counsel to Prime Retail, Inc., a Maryland
corporation (the "Company"), in connection with the preparation of the
Registration Statement on Form S-3 (the "Registration Statement") to be filed
with the Securities and Exchange Commission (the "Commission").  The
Registration Statement relates to the issuance and sale from time to time,
pursuant to Rule 415 of the General Rules and Regulations promulgated under the
Securities Act of 1933, as amended (the "Act"), of the following securities with
an aggregate initial offering price of up to $400,000,000 (or the equivalent
thereof, based on the applicable exchange rate at the time of sale, in one or
more foreign currencies, currency units or composite currencies as shall be
designated by the Company):  (i) shares of preferred stock, $.01 par value per
share ("Preferred Stock"), of the Company, (ii) shares of Preferred Stock
represented by depository shares (the  "Depository Shares"), (iii) warrants to
purchase shares of Preferred Stock (the "Preferred Stock Warrants"), with an
aggregate public offering price of up to $400,000,000 (or its equivalent in
another currency based on the exchange rate at the time of sale) in amounts, at
prices  and on terms to be determined at the time of offering, (iv) shares of
Common Stock, $.01 par value per share ("Common Stock"), of the Company, or (v)
warrants to purchase shares of Common Stock (the "Common Stock Warrants").  The
Preferred Stock, Depositary Shares, Preferred Stock Warrants, Common Stock and
Common Stock Warrants are collectively referred to herein as the "Offered
Securities."  This opinion is furnished in accordance with the requirements of
Item 601(b)(5) of Regulation S-K under the Act.  Except as otherwise specified,
capitalized terms used herein shall have the same meanings as are ascribed to
such terms in the Registration Statement.

          In connection with this opinion, we have examined originals or copies,
certified or otherwise identified to our satisfaction, of: (i) the Registration
Statement filed with the Commission on December 7, 1998 under the Act; (ii) the
Amended and Restated Articles of Incorporation of the Company as in effect on
the date hereof (the "Charter"); (iii) the Amended and Restated By-laws of the
Company as in effect on the date hereof; and (iv) resolutions adopted by the
Board of Directors of the Company authorizing, among other things, the issuance
and sale of the Offered Securities and the proper officers and committee of the
Board of Directors of the Company designated to determine the final form and
terms of the Offered Securities (the "Board Resolutions").  We have also


<PAGE>

Prime Retail, Inc.
December 7, 1998
Page 2


examined originals or copies, certified or otherwise identified to our
satisfaction, of such records of the Company and such agreements, certificates
of public officials, certificates of officers or other representatives of the
Company and others, and such other documents, certificates and records as we
have deemed necessary or appropriate as a basis for the opinions set forth
herein.

          In our examination, we have assumed the legal capacity of all natural
persons, the genuineness of all signatures, the authenticity of all documents
submitted to us as originals, the conformity to original documents of all
documents submitted to us as certified, conformed or photostatic copies and the
authenticity of the originals of such latter documents.  In making our
examination of documents executed or to be executed by parties other than the
Company, we have assumed that such parties have the power, corporate or other,
to enter into and perform all obligations thereunder and have also assumed the
due authorization by all requisite action, corporate or other, and execution and
delivery by such parties of such documents and the validity and binding effect
thereof.  As to any facts material to the opinions expressed herein that were
not independently established or verified, we have relied upon statements and
representations of officers and other representatives of the Company and others.

          Members of our firm are admitted to the bar in the States of Illinois
and New York, and we do not express any opinion as to the laws of any other
jurisdiction other than the General Corporation Law of the State of Maryland. 
The Offered Securities may be issued from time to time on a delayed or
continuous basis, and this opinion is limited to the laws, including the rules
and regulations, as in effect on the date hereof.

          Based upon and subject to the foregoing, we are of the opinion that: 

          1.   When (i) the Registration Statement shall have become effective
under the Act, (ii) the Blue Sky or securities laws of certain states shall have
been complied with, (iii) if the Preferred Stock is to be sold pursuant to a
firm commitment underwritten offering, an underwriting agreement (the
"Underwriting Agreement") to be entered into by the Company and one or more
underwriters with respect to such Preferred Stock in the form to be filed as an
exhibit to the Registration Statement, any amendment thereto or any document
incorporated by reference therein has been duly authorized, executed and
delivered by the Company and the other parties thereto, (iv) the Board of
Directors, including any appropriate committee appointed thereby, and
appropriate officers of the Company have taken all necessary corporate action to
approve the issuance and terms of the shares of the Preferred Stock and related
matters, including the adoption of any Articles Supplementary to the Charter of
the Company designating terms of a series of Preferred Stock (other than the
Series A Preferred Stock, the Series B Preferred Stock or the Series C Preferred
Stock) (a "Designating Amendment"), (v) the filing of a Designating Amendment,
if applicable, with the Secretary of State of the State of Maryland has duly
occurred, (vi) the terms of the Preferred Stock 


<PAGE>

Prime Retail, Inc.
December 7, 1998
Page 3


and of their issuance and sale have been duly established in conformity with 
the Company's Charter, including a Designating Amendment relating to the 
Preferred Stock, if applicable, and the By-laws of the Company so as not to 
violate any applicable law or the Company's Charter or By-laws or result in a 
default under or breach of any agreement or instrument binding upon the 
Company and so as to comply with any requirement or restriction imposed by 
any court or governmental body having jurisdiction over the Company, (vii) 
certificates representing the shares of the Preferred Sock are duly executed, 
countersigned, registered and delivered upon payment of the agreed-upon 
consideration therefor, (viii) the Preferred Stock shall have been (A) 
authorized, issued and sold in accordance with the related underwriting 
agreements or any other applicable duly authorized, executed and delivered 
purchase agreement and the Company shall have received consideration therefor 
or (B) issued upon conversion or exchange of Preferred Stock which, by their 
respective terms, are convertible into or exchangeable for shares of 
Preferred Stock or upon exercise of Preferred Stock Warrants and the Company 
shall have received any additional consideration which is payable upon such 
conversion, exchange or exercise, the Preferred Stock will be validly issued, 
fully paid and nonassessable, and (ix) the shareholders of the Company shall, 
to the extent reserved by the Charter and the General Corporation Law of the 
State of Maryland, have approved the authorization and issuance of any shares 
of Preferred Stock.

          2.   When (i) the Registration Statement shall have become effective,
(ii) the Blue Sky or securities laws of certain states shall have been complied
with, (iii) if the Depositary Shares are to be sold pursuant to a firm
commitment underwritten offering, the Underwriting Agreement with respect to the
Depositary Shares in the form to be filed as an exhibit to the Registration
Statement, any amendment thereto or any document incorporated by reference
therein has been duly authorized, executed and delivered by the Company and the
other parties thereto, (iv) the Board of Directors, including any appropriate
committee appointed thereby, and appropriate officers of the Company have taken
all necessary corporate action to approve the issuance and terms of the
Depositary Shares and related matters, including the adoption of a Designating
Amendment, if applicable, for the related Preferred Stock, (v) the filing of a
Designating Amendment, if applicable, with the Secretary of State of the State
of Delaware has duly occurred, (vi) a deposit agreement relating to the
Depositary Shares (the "Deposit Agreement") in the form to be filed as an
exhibit to the Registration Statement, any amendment thereto or any document
incorporated by reference therein has been duly executed and delivered by the
Company and a depository, (vii) the terms of the Depositary Shares and of their
issuance and sale have been duly established in conformity with the Deposit
Agreement so as not to violate any applicable law or the Charter or By-laws of
the Company or result in a default under or breach of any agreement or
instrument binding upon the Company and so as to comply with any requirement or
restriction imposed by any court or governmental body having jurisdiction over
the Company, (viii) the related Preferred Stock which is represented by the
Depositary Shares has been duly authorized, validly issued and delivered, if
applicable, to the depository for deposit in accordance with the laws of the
State of Maryland and 


<PAGE>

Prime Retail, Inc.
December 7, 1998
Page 4


any other applicable jurisdiction, and (ix) the receipts evidencing the 
Depositary Shares (the "Depositary Receipts") are duly issued against the 
deposit of the Preferred Stock in accordance with the Deposit Agreement, such 
Receipts will be validly issued and will entitle the holders thereof to the 
rights specified therein and in the Deposit Agreement.

          3.   When (i) the Registration Statement shall have become effective
under the Act, (ii) the Blue Sky or securities laws of certain states shall have
been complied with, (iii) if the Common Stock is to be sold pursuant to a firm
commitment underwritten offering, an Underwriting Agreement with respect to such
Common Stock in the form to be filed as an exhibit to the Registration
Statement, any amendment thereto or any document incorporated by reference
therein has been duly authorized, executed and delivered by the Company and the
other parties thereto, (iv) certificates representing the shares of the Common
Stock are duly executed, countersigned, registered and delivered upon payment of
the agreed upon consideration therefor, (v) the Board of Directors of the
Company, including any appropriate committee appointed thereby, and appropriate
officers of the Company have taken all necessary corporate action to approve the
issuance of the Common Stock and related matters, (vi) the terms of the issuance
of the Common Stock have been duly established as contemplated by the Board
Resolutions in conformity with the Company's Charter and By-laws so as not to
violate any applicable law or the Charter or By-laws of the Company or results
in a default under or breach of any agreement or instrument binding upon the
Company and so as to comply with any requirement or restriction imposed by any
court or governmental body having jurisdiction over the Company, and (vii) the
Common Stock shall have been (A) authorized, issued and sold in accordance with
the related Underwriting Agreement or any other applicable duly authorized,
executed and delivered purchase agreement and the Company shall have received
consideration therefor, provided that the amount of such consideration shall not
be less than the par value thereof, or (B) issued upon conversion or exchange of
Preferred Stock which, by their respective terms, are convertible into or
exchangeable for shares of Common Stock or upon exercise of Common Stock
Warrants, and the Company shall have received any additional consideration which
is payable upon such conversion or exchange, the Common Stock shall be validly
issued, fully paid and nonassessable.

          4.   When (i) the Registration Statement has become effective under
the Act, (ii) the Blue Sky or securities laws of certain states shall have been
complied with, (iii) if the Preferred Stock Warrants and Common Stock Warrants
(collectively, the "Warrants") are to be sold pursuant to a firm commitment
underwritten offering, the Underwriting Agreement with respect to such Warrants
in the form to be filed as an exhibit to the Registration Statement, any
amendment thereto or any document incorporated by reference therein has been
duly authorized, executed and delivered by the Company and the other parties
thereto, (iv) the warrant agreement relating to the Warrants (the "Warrant
Agreement") in the form to be filed as an exhibit to the Registration Statement,
any amendment thereto or any document incorporated by reference therein has been
duly authorized, 


<PAGE>

Prime Retail, Inc.
December 7, 1998
Page 5


executed and delivered by the Company and the other parties thereto, (v) the 
terms of the Warrants and of their issuance and sale have been duly 
established in conformity with the Warrant Agreement relating to such 
Warrants so as not to violate any applicable law, the Charter or By-laws of 
the Company or result in a default under or breach of any agreement or 
instrument binding upon the Company and so as to comply with any requirement 
or restriction imposed by any court or governmental body having jurisdiction 
over the Company, and (vi) the Warrants have been duly executed, delivered 
and countersigned, in accordance with the Warrant Agreement relating to such 
Warrants, and duly issued and sold in the applicable form to be filed as an 
exhibit to the Registration Statement or any amendment thereto and in the 
manner contemplated by the related Underwriting Agreement or any other duly 
authorized, executed and delivered purchase agreement and the Company shall 
have received consideration therefor, any  such Warrants will constitute 
valid and binding obligations of the Company enforceable against the Company 
in accordance with their terms, except to the extent that enforcement thereof 
may be limited by (a) bankruptcy, insolvency, reorganization, moratorium, 
fraudulent conveyance or other similar laws now or hereafter in effect 
relating to or affecting creditors' rights generally and (b) general 
principles of equity (regardless of whether enforcement is considered in a 
proceeding of law or in equity).

          To the extent that the obligations of the Company under a Deposit
Agreement relating to the Depositary Shares may be dependent upon such matters,
we have assumed for purposes of this opinion (i) that the applicable depository
is duly organized, validly existing and in good standing under the laws of its
jurisdiction of organization and is duly qualified to engage in the activities
contemplated by the Deposit Agreement, (ii) that such Deposit Agreement has been
duly authorized, executed and delivered by and constitutes the legal, valid and
binding obligation of such depository enforceable in accordance with its terms,
(iii) that such depository is in compliance, generally and with respect to
acting as a depository under the Deposit Agreement with all applicable laws and
regulations, and (iv) that such depository has the requisite organizational and
legal power and authority to perform its obligations under the Deposit
Agreement.

          We hereby consent to the filing of this opinion with the Commission as
an exhibit to the Registration Statement.  We also consent to the reference to
our firm under the caption "Legal Opinion" in the Registration Statement.  In
giving this consent, we do not thereby admit that we are included in the
category of persons whose consent is required under Section 7 of the Act or the
rules and regulations of the Commission.

                              Very truly yours,

                              /s/ Winston & Strawn



<PAGE>

                                  EXHIBIT 12.1

                        COMPUTATION OF RATIO OF EARNINGS
    TO COMBINED FIXED CHARGES AND PREFERRED STOCK DISTRIBUTIONS AND DIVIDENDS
               (Amounts in thousands, except for ratio information)

<TABLE>
<CAPTION>
                                                            Nine Months                                            
                                                         Ended September 30,              Year Ended December 31,      
                                                         -------------------              -----------------------
                                                         1998         1997           1997           1996         1995
                                                         ----         ----           ----           ----         ----
<S>                                                    <C>          <C>            <C>           <C>           <C>
Income (loss) before minority interests........         $ 9,721      $11,167        $18,547        $6,986       $12,806 
Loss on sale of real estate....................          15,461            -              -             -             - 
Interest incurred..............................          42,984       30,155         39,078        26,806        22,394 
Amortization of capitalized interest...........             341          235            343           284           222 
Amortization of debt issuance costs............           1,193        1,818          2,330         2,407         3,309 
Amortization of interest rate protection
   contracts...................................           1,006        1,043          1,390         1,383         1,276 
Less interest earned on interest rate
   protection contracts........................             (23)         (86)          (115)         (201)         (721) 
Less capitalized interest......................          (4,511)      (3,176)        (3,818)       (3,462)       (2,675)
                                                       --------     --------       --------      --------      -------- 
   Earnings....................................          66,172       41,156         57,755        34,203        36,611
                                                       --------     --------       --------      --------      -------- 
Interest incurred..............................          42,984       30,155         39,078        26,806        22,394 
Amortization of debt issuance costs............           1,193        1,818          2,330         2,407         3,309 
Amortization of interest rate protection
   contracts...................................           1,006        1,043          1,390         1,383         1,276 
Preferred stock distributions and
   dividends...................................          17,648        9,280         12,726        14,236        20,944
                                                       --------     --------       --------      --------      -------- 
   Combined Fixed Charges and
      Preferred Stock Distributions and
      Dividends................................          62,831       42,296         55,524        44,832        47,923
                                                       --------     --------       --------      --------      -------- 
Excess of Combined Fixed Charges and
   Preferred Stock Distributions and
   Dividends over Earnings.....................         $     -      $(1,140)       $     -      $(10,629)     $(11,312)
                                                       --------     --------       --------      --------      --------
                                                       --------     --------       --------      --------      -------- 
Ratio of Earnings to Combined Fixed
   Charges and Preferred Stock
   Distributions and Dividends.................           1.05x            -          1.04x             -             - 
                                                       --------     --------       --------      --------      --------
                                                       --------     --------       --------      --------      --------

<CAPTION>

                                                  Period from    Period from
                                                  March 22 to    January 1 to    Year Ended
                                                  December 31,     March 21,    December 31,
                                                      1994           1994           1993
                                                      ----           ----           ----
<S>                                               <C>            <C>            <C>
Income (loss) before minority interests........         $9,454       $(2,408)        $(3,873)
Loss on sale of real estate....................              -             -               -
Interest incurred..............................          8,491         2,585           9,277
Amortization of capitalized interest...........            152            42             161
Amortization of debt issuance costs............          2,160           695             362
Amortization of interest rate protection
   contracts...................................            797             -               -
Less interest earned on interest rate
   protection contracts........................           (224)            -               -
Less capitalized interest......................         (1,277)            -            (711)
                                                      --------      --------        --------
   Earnings....................................         19,553           914           5,216
                                                      --------      --------        --------
Interest incurred..............................          8,491         2,585           9,277
Amortization of debt issuance costs............          2,160           695             362
Amortization of interest rate protection
   contracts...................................            797             -               -
Preferred stock distributions and
   dividends...................................         16,290             -               -
                                                      --------      --------        --------
   Combined Fixed Charges and
      Preferred Stock Distributions and
      Dividends................................         27,738         3,280           9,639
                                                      --------      --------        --------
Excess of Combined Fixed Charges and
   Preferred Stock Distributions and
   Dividends over Earnings.....................        $(8,185)      $(2,366)        $(4,423)
                                                      --------      --------        --------
                                                      --------      --------        --------
Ratio of Earnings to Combined Fixed
   Charges and Preferred Stock
   Distributions and Dividends.................              -             -               -
                                                      --------      --------        --------
                                                      --------      --------        --------
</TABLE>


<PAGE>

                                    EXHIBIT 23.1
                                          
                          CONSENT OF INDEPENDENT AUDITORS


We consent to reference to our firm under the caption "Experts" and to the
incorporation by reference in the Registration Statement (Form S-3) pertaining
to Prime Retail, Inc. of our reports (a) dated January 23, 1998, with respect to
the statements of revenue and certain expenses of Prime Transferred Properties
included in the Registration Statement (Form S-4 No. 333-51285) of Sky Merger
Corp. and related Joint Proxy Statement/Prospectus/Information Statement, and
(b) dated January 23, 1998 (except for Note 15, as to which the date is February
1, 1998), with respect to the consolidated financial statements and schedule of
Prime Retail, Inc., included in its Annual Report (Form 10-K), both for the year
ended December 31, 1997, filed with the Securities and Exchange Commission.



Baltimore, Maryland
December 4, 1998



<PAGE>

                                                                 Exhibit 23.2
                          CONSENT OF INDEPENDENT AUDITORS



We consent to the reference to our firm under the caption "Experts" and to the
incorporation by reference in this Registration Statement (Form S-3) and related
Prospectus of Prime Retail, Inc. of our report dated March 13, 1998 (except for
the second paragraph of Note 3 and the fourth and fifth  paragraphs of Note 4,
as to which the date is April 1, 1998), with respect to the consolidated
financial statements and schedule of Horizon Group, Inc., included in its Annual
Report (Form 10-K/A) for the year ended December 31, 1997, and our report dated
April 3, 1998 with respect to the combined financial statements and schedule of
Horizon Group Properties, Inc., included in the Registration Statement (Form S-4
No. 333-51285) of Sky Merger Corp. and the related Joint Proxy
Statement/Prospectus/Information Statement, filed with the Securities and
Exchange Commission.





Chicago, Illinois
December 4, 1998



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