UNIONBANCAL CORP
DEF 14A, 1998-04-29
NATIONAL COMMERCIAL BANKS
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<PAGE>
                                     [LOGO]
 
                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS
                                  MAY 27, 1998
 
                            ------------------------
 
    The Annual Meeting of the Shareholders of UNIONBANCAL CORPORATION (the
"Company") will be held on Wednesday, May 27, 1998, at 10:30 a.m. at the
Mandarin Oriental Hotel, Embassy Room, 222 Sansome Street, San Francisco,
California, for the following purposes:
 
    1.  To elect twenty directors to hold office until the next Annual Meeting
       of Shareholders or until their successors are elected;
 
    2.  To approve the amendment and restatement of the Articles of
       Incorporation of UnionBanCal Corporation to eliminate cumulative voting
       for the election of directors and to eliminate provisions relating to
       preferred stock that is no longer outstanding;
 
    3.  To ratify the selection of Deloitte & Touche LLP as independent auditors
       for the Company for the year ending December 31, 1998; and
 
    4.  To transact such other business as may properly come before the meeting
       or any adjournment thereof.
 
    The Board of Directors has fixed the close of business on April 10, 1998, as
the record date for determining shareholders entitled to notice of and to vote
in person or by proxy at the Annual Meeting or any adjournment thereof.
 
    Whether or not you presently plan to attend the meeting in person, the Board
of Directors urges you to date, sign, and promptly return the enclosed proxy.
Your giving of such proxy does not preclude your right to vote in person if you
attend the meeting. A postage-prepaid return envelope is enclosed for your
convenience in returning the signed proxy.
 
    Your early attention to the proxy will be appreciated.
 
                                          By Order of the Board of Directors,
 
                                                          [SIG]
 
                                          JEAN C. NOMURA
                                          CORPORATE SECRETARY
 
San Francisco, California
Dated: April 29, 1998
 
    This notice was accompanied by a mailing of the Company's 1997 Annual Report
to Shareholders. Additional copies of the Annual Report may be obtained from the
Investor Relations Department, UnionBanCal Corporation, 400 California Street,
Mail Code 1-001-8B San Francisco, California 94104, (415) 765-2969.
<PAGE>
                            UNIONBANCAL CORPORATION
                             400 CALIFORNIA STREET
                        SAN FRANCISCO, CALIFORNIA 94104
                                 (415) 765-2969
 
                            ------------------------
 
                                PROXY STATEMENT
                             ---------------------
 
    This Proxy Statement is furnished in connection with the solicitation of
proxies by the Board of Directors of UNIONBANCAL CORPORATION (the "Company") to
be used in voting at the Company's Annual Meeting of Shareholders to be held on
Wednesday, May 27, 1998, at 10:30 a.m. at the Mandarin Oriental Hotel, Embassy
Room, 222 Sansome Street, San Francisco, California, and at any adjournment
thereof (the "Annual Meeting").
 
    This Proxy Statement and the accompanying form of proxy were first sent or
given to shareholders on or about April 29, 1998.
 
    All expenses incident to the preparation and mailing of, or otherwise making
available to all shareholders, the notice, proxy statement, and proxy will be
paid by the Company. In addition to solicitation of proxies by the use of the
mails, some of the officers and employees of the Company, who will receive no
additional compensation for such services, may solicit proxies personally or by
telephone. The Company will request brokers and nominees who hold Company stock
in their name to furnish proxy material to beneficial owners of the stock and
will reimburse such brokers and nominees for their reasonable expenses incurred
in forwarding solicitation material to such beneficial owners.
 
    On April 10, 1998, the date for determining shareholders entitled to vote at
the meeting, there were 54,945,321 shares outstanding of Common Stock ("Common
Stock") of the Company. To the knowledge of the Company, the only shareholders
owning of record or beneficially on such date more than 5% of the outstanding
voting securities are shown in the following table:
 
<TABLE>
<CAPTION>
                                                                                  AMOUNT AND NATURE OF     PERCENT
            TITLE OF CLASS               NAME AND ADDRESS OF BENEFICIAL OWNER     BENEFICIAL OWNERSHIP    OF CLASS
- --------------------------------------  ---------------------------------------  ----------------------  -----------
<S>                                     <C>                                      <C>                     <C>
Common Stock..........................  The Bank of Tokyo-Mitsubishi, Ltd.               44,251,991          80.54%
                                          ("BTM") 7-1, Marunouchi 2-chome,
                                          Chiyoda-ku, Tokyo, 100, Japan
</TABLE>
 
    BTM, WHICH HOLDS AN AGGREGATE OF APPROXIMATELY 80.54% OF THE SHARES OF THE
COMPANY'S COMMON STOCK OUTSTANDING ON THE RECORD DATE, INTENDS TO VOTE ITS
SHARES IN FAVOR OF: THE ELECTION OF THE PERSONS NAMED AS NOMINEES FOR DIRECTOR
IN THIS PROXY STATEMENT, THE APPROVAL OF THE AMENDMENT AND RESTATEMENT OF THE
ARTICLES OF INCORPORATION OF UNIONBANCAL CORPORATION TO ELIMINATE CUMULATIVE
VOTING FOR THE ELECTION OF DIRECTORS AND TO ELIMINATE PROVISIONS RELATING TO
PREFERRED STOCK THAT IS NO LONGER OUTSTANDING, AND THE RATIFICATION OF THE
SELECTION OF DELOITTE & TOUCHE LLP AS INDEPENDENT AUDITORS FOR THE COMPANY FOR
THE YEAR ENDING DECEMBER 31, 1998.  APPROVAL OF THESE PROPOSALS BY THE
SHAREHOLDERS IS THEREFORE ASSURED.
 
    Each outstanding share of Common Stock is entitled to one vote on all
matters coming before the meeting, except with respect to the election of
directors wherein votes may be cumulated. In cumulating votes for the election
of directors, each shareholder is entitled to as many votes as shall equal the
number of directors to be elected, multiplied by the number of shares held by
such shareholder, and all such votes may be cast for a single director or be
distributed among the number of directors to be voted on as the
 
                                       1
<PAGE>
shareholder may see fit. No shareholder is entitled to cumulate votes for any
candidate unless such candidate's or candidates' name(s) have been placed in
nomination prior to commencement of the voting and a shareholder has given
notice at the meeting prior to the commencement of the voting of the
shareholder's intention to cumulate votes. In connection with the proxies,
discretionary authority to cumulate votes is also solicited by the Board of
Directors.
 
    When proxies in the accompanying form are returned, properly dated and
executed, the shares they represent will be voted at the Annual Meeting in
accordance with the shareholder's directions. If no contrary instructions are
given, the persons named in the proxy intend to vote the shares represented by
the proxies (1) in favor of the election of the persons named as nominees for
director in this Proxy Statement, (2) for approval of the amendment and
restatement of the Articles of Incorporation of UnionBanCal Corporation to
eliminate cumulative voting for the election of directors and to eliminate
provisions relating to preferred stock that is no longer outstanding, (3) for
ratification of the selection of Deloitte & Touche LLP as independent auditors
for the Company for the year ending December 31, 1998, and (4) in accordance
with their best judgment on any other matter which may come before the meeting.
If any proxy is marked "withhold authority" with regard to the election of
directors, the shares which such proxy represents will not be voted either for
or against the election of such directors.
 
    The giving of the proxy does not affect any shareholder's right to vote in
person at the Annual Meeting, and a proxy may be revoked by appropriate notice
in writing to the Corporate Secretary of the Company at 400 California Street,
Mail Code 1-001-18, San Francisco, CA, 94104, at any time before it is voted.
Abstentions and "broker non-votes" (shares held by brokers or nominees which are
present in person or represented by proxy at the Annual Meeting but as to which
voting instructions have not been received from the beneficial owners or persons
entitled to vote such shares and the broker or nominee does not have
discretionary voting power under rules applicable to brokers) are treated as
shares that are present for purposes of determining the presence of a quorum.
 
                              CORPORATE GOVERNANCE
 
    The Company is a bank holding company registered under the Bank Holding
Company Act of 1956, as amended, and is incorporated in the State of California.
The Company's principal subsidiary is Union Bank of California, N.A. (the
"Bank"), a national banking association organized under the laws of the United
States. The Company's 1997 Annual Report provides a review of the Company's
operations during the past year.
 
    The Board of Directors met 11 times in 1997. All incumbent directors
attended at least 75% of the Company's Board of Directors and committee meetings
held in 1997, except for J. Fernando Niebla, 68%, Tsuneo Wakai, 18%, and Kenji
Yoshizawa, 27%. Directors who are not full-time officers of the Company or BTM
or its affiliates received an annual combined retainer for service on the
Company and Bank boards and meeting fees for Board meetings attended and for
Board committee meetings attended. The annual combined retainer for service on
the Company and Bank boards is $20,000 which is prorated and payable quarterly
in advance. Directors who are not full-time officers of the Company or BTM or
its affiliates were paid the following: a fee of $1,000 for each Board of
Directors meeting attended except that when Board meetings of the Company and
the Bank were held on the same day, the total fee was limited to $1,000; and, a
fee of $1,000 for each Board committee meeting attended except that when the
same committees of the Company and the Bank had a combined meeting, the total
fee was limited to $1,000. In addition, the annual combined retainer for service
on the Company and Bank Boards for each non-officer committee chairman is $5,000
pro-rated and payable quarterly in advance.
 
    The Company and the Bank have each established the Board committees
described below. The membership of each committee is the same for the Company
and the Bank, and the corresponding committees of both institutions usually hold
combined meetings.
 
                                       2
<PAGE>
    The Audit and Examining Committee oversees the Company's financial reporting
and control environment. It meets regularly with the Company's general auditor
and its independent auditors to review the scope and results of their work as
well as to review the Company's quarterly and annual financial statements and
regulatory disclosures with the officers in charge of the Company's financial
reporting, control and disclosure functions. The Committee also makes an annual
recommendation to the Board of Directors of the Company's independent auditors
(see Section III., Ratification of the Selection of Independent Auditors). In
addition, the Committee reviews reports of examination conducted by bank and
bank holding company regulatory agencies and follows up with appropriate
management, so that recommendations and corrective actions are implemented.
Directors who served on the Committee at December 31, 1997, were: Sidney R.
Petersen, Chairman; Mary S. Metz; Charles R. Scott; and Henry T. Swigert. The
Committee met eight (8) times in 1997.
 
    The Credit Policy and Review Committee oversees the credit functions of the
Company including the overall loan portfolio, composite credit policies, loan
review and examination policies, and the methodology and adequacy of the
allowance for loan losses. It also reviews a compliance program for credit
functions and the establishment and delegation of credit authority. The
Committee considers reports of bank and bank holding company regulatory agency
examinations and management's responses. Directors who served on the Committee
at December 31, 1997, were: Stanley F. Farrar, Chairman; Richard D. Farman;
Harry W. Low; and Raymond E. Miles. The Committee met eight (8) times in 1997.
 
    The Executive Compensation and Benefits Committee reviews and approves
executive officer compensation criteria and levels and oversees the Company's
and the Bank's employee benefit plans. The Committee approves the compensation
of the Chief Executive Officer and other executive officers. In addition, it
approves restricted stock awards and stock option grants under the Company's
Management Stock Plan. The Executive Compensation and Benefits Committee Report
on Executive Compensation appears on page 18. Directors who served on the
Committee at December 31, 1997, were: Richard D. Farman, Chairman; Jack L.
Hancock; Carl W. Robertson; and Henry T. Swigert. The Committee met nine (9)
times in 1997.
 
    The Nominating Committee is responsible for screening, interviewing, and
proposing qualified candidates to fill vacancies on the Board of the Company
and/or the Bank as they occur and recommending to the respective Board the
director nominees to be elected by the shareholders at the annual meeting. In
carrying out its responsibilities, the Committee will consider candidates
recommended by shareholders. Directors who served on the Committee at December
31, 1997, were: Takahiro Moriguchi, Chairman; Richard D. Farman; Jack L.
Hancock; J. Fernando Niebla; Minoru Noda; and Carl W. Robertson. The Committee
met one (1) time since May 1997.
 
    Section 16 of the Bylaws of the Company can be summarized as follows:
Nominations for election of members of the Board of Directors may be made by the
Board of Directors or by any shareholder of any outstanding capital stock of the
Company entitled to vote for the election of directors at the Annual Meeting of
Shareholders. Notice of intention to make any nominations by a shareholder shall
be made in writing and shall be delivered or mailed to the Secretary at 400
California Street, Mail Code 1-001-18, San Francisco, CA 94104, not less than
ten (10) days nor more than sixty (60) days prior to any meeting of shareholders
called for the election of directors. Such notification shall contain the
following information to the extent known to the notifying shareholder: (a) the
name and address of each proposed nominee; (b) the principal occupation of each
proposed nominee; (c) the number of shares of capital stock of the corporation
owned by each proposed nominee; (d) the name and residence address of the
notifying shareholder; (e) the number of shares of capital stock of the Company
owned by the notifying shareholder. Nominations not made in accordance herewith
may, in the discretion of the chairman of the meeting, be disregarded and upon
the chairman's instructions, the inspectors of election can disregard all votes
cast for each such nominee.
 
                                       3
<PAGE>
    The Public Policy Committee is responsible for identifying relevant
political, social and environmental trends. The Committee monitors the Bank's
programs which carry out the purposes of the Community Reinvestment Act, fair
lending laws, equal employment opportunity laws and other related federal, state
and local programs. Directors who served on the Committee at December 31, 1997,
were: Herman E. Gallegos, Chairman; Raymond E. Miles; J. Fernando Niebla; and
Blenda J. Wilson. The Committee met five (5) times in 1997.
 
    The Risk Review committee is responsible for review, oversight and
monitoring of the Company's and the Bank's risk management program in
coordination with other committees of the Board. The committee considers both
bank and bank holding company regulatory agency guidance in connection with its
responsibilities. The committee, through reviews and monitoring of risk
assessments, various management reports, and oversight of the corporate risk
management function, ensures that management has appropriate programs in place
for the effective identification, measurement, control and monitoring of risk.
Directors who served on the Committee at December 31, 1997, were: Henry T.
Swigert, Chairman; Herman E. Gallegos; Mary S. Metz; and Carl W. Robertson. The
Committee met three (3) times in 1997.
 
    Other Company Board committees are a Common and Preferred Stock Committee,
which met three (3) times in 1997, and an Executive Committee, which did not
meet in 1997.
 
    The Trust Committee, a committee of the Bank board only, supervises the
administration of the fiduciary powers of the Bank and the Bank's non-fiduciary
investment management activities. The Committee reviews reports of bank
regulatory agencies, the Company's general auditor and its independent auditors;
and follows up on their findings and recommendations with management to ensure
that corrective actions are taken. Directors who served on the Committee at
December 31, 1997, are: Carl W. Robertson, Chairman; Herman E. Gallegos; Jack L.
Hancock; and J. Fernando Niebla. The Committee met nine (9) times in 1997.
 
    Other Bank Board committees are a National Bank Act Committee (9 meetings),
a Securities Activities and Derivatives Committee (4 meetings, abolished in
October 1997), and an Executive Committee (no meetings).
 
    It is anticipated that the composition of the foregoing committees will
change after the Annual Meeting.
 
    The Board of Directors has adopted a retirement policy which provides that
any director who is employed full time by the Company or the Bank shall retire
from the Board at age 65 and any director who is not employed full time by the
Company or the Bank shall not stand for reelection at the Annual Meeting of
Shareholders following the director's seventieth birthday. The Board has
provided an exception to this policy for directors Tsuneo Wakai and Tamotsu
Yamaguchi, who are over age 70 and 65 respectively, and may stand for reelection
as a director of the Company and the Bank until their successors are elected.
 
                            I. ELECTION OF DIRECTORS
 
    Twenty directors of the Company are to be elected at the Annual Meeting to
serve until the next Annual Meeting of Shareholders or until earlier retirement,
resignation or their successors are elected. The nominees as set forth below are
all presently directors of the Company. A resolution of the Company's Board
pursuant to the Bylaws of the Company sets the exact number of directors at
twenty. All nominees are also directors of the Bank, except Messrs. Wakai and
Yoshizawa, and if reelected as directors of the Company, are expected to be
reelected as directors of the Bank by the shareholders of the Bank except for
the aforenamed nominees. Mr. Scott is not standing for reelection. It is
anticipated that Mr. Noda will return to Japan for reassignment later this year.
Mr. Yoshihiko Someya is expected to assume Mr. Noda's responsibilities as an
officer of the Company and the Bank. The exact timing of this transition has not
yet been decided.
 
                                       4
<PAGE>
    Unless authority to vote for directors is withheld as to any or all of them,
it is intended that shares represented by proxies in the accompanying form will
be voted FOR the election of the persons listed below or, if one or more of such
persons shall become unable or unwilling to accept nomination or election, FOR
the election of such other persons as the President or Board of Directors of the
Company may recommend in their place. The Board of Directors has no reason to
believe that any such nominee will be unable or unwilling to serve.
 
    The following information is furnished with respect to the nominees for
director: name, age, the number of shares of the Company's and BTM's Common
Stock beneficially owned by the nominee as of March 31, 1998, the nominee's
business experience during the past five years, directorships in other
corporations, and periods of service as a director of the Company.
 
<TABLE>
<CAPTION>
                                                                                                      SHARES OF
                                                                              SHARES OF COMMON   COMMON STOCK OF THE
                                                                                  STOCK OF             BANK OF
                                                                                 UNIONBANCAL      TOKYO-MITSUBISHI,
                                                                              CORPORATION OWNED          LTD.
                NAME AND PRINCIPAL OCCUPATIONS                                 BENEFICIALLY AS    OWNED BENEFICIALLY
                  DURING THE LAST FIVE YEARS                                         OF                 AS OF
                   OF NOMINEES FOR DIRECTOR                          AGE       MARCH 31, 1998+     MARCH 31, 1998++
- ---------------------------------------------------------------  -----------  -----------------  --------------------
<S>                                                              <C>          <C>                <C>
Richard D. Farman..............................................          62             500                  -0-
  Mr. Farman has served as President and Chief Operating
    Officer of Pacific Enterprises since September 1993. Mr.
    Farman also served as Chief Executive Officer of Southern
    California Gas Company, a subsidiary of Pacific Enterprises
    from January 1989, through December 1994. Mr. Farman has
    been a director of the Company since November 1988.
 
Stanley F. Farrar..............................................          55             -0-                1,250
  Mr. Farrar has been a partner of Sullivan & Cromwell since
    October 1984. He served as a director of the former BanCal
    Tri-State Corporation and the former Bank of California,
    N.A. from June 1984 until March 1996. Mr. Farrar has been a
    director of the Company since April 1996.
 
Herman E. Gallegos.............................................          67             154                  -0-
  Mr. Gallegos has been an independent management consultant
    since January 1982. He has served as a director of SBC
    Communications Inc. since April 1997 and The California
    Endowment since May 1996. Mr. Gallegos has been a director
    of the Company since November 1988.
 
Jack L. Hancock................................................          67             500(3)               -0-
  Mr. Hancock was Executive Vice President of Pacific Bell from
    February 1988 until December 1993. He has been a director
    of Whittaker Corporation since February 1994 and MGC
    Communications and Bankserv, LLP, since July 1996. Mr.
    Hancock has been a director of the Company since July 1994.
</TABLE>
 
                                       5
<PAGE>
<TABLE>
<CAPTION>
                                                                                                      SHARES OF
                                                                              SHARES OF COMMON   COMMON STOCK OF THE
                                                                                  STOCK OF             BANK OF
                                                                                 UNIONBANCAL      TOKYO-MITSUBISHI,
                                                                              CORPORATION OWNED          LTD.
                NAME AND PRINCIPAL OCCUPATIONS                                 BENEFICIALLY AS    OWNED BENEFICIALLY
                  DURING THE LAST FIVE YEARS                                         OF                 AS OF
                   OF NOMINEES FOR DIRECTOR                          AGE       MARCH 31, 1998+     MARCH 31, 1998++
- ---------------------------------------------------------------  -----------  -----------------  --------------------
<S>                                                              <C>          <C>                <C>
Richard C. Hartnack............................................          52          45,071(5)(6)             -0-
  Mr. Hartnack has served as Vice Chairman and head of the
    Community Banking Group of the Company and the Bank since
    April 1996. He served as Vice Chairman of the former Union
    Bank from June 1991 until March 1996. Mr. Hartnack has
    served as a director of the Company since June 1991.
 
Harry W. Low...................................................          67           1,487(3)               -0-
  Judge Low has been a mediator and arbitrator with Judicial
    Arbitration & Mediation Services/ Endispute, Inc.
    (JAMS/Endispute) since March 1992. He was the Presiding
    Justice for the State of California Court of Appeal, 1st
    District until his retirement in January 1992. Judge Low
    has been a director of the Company since January 1993.
 
Mary S. Metz...................................................          60             400(3)               -0-
  Dr. Metz has been the Dean of University Extension,
    University of California, Berkeley, since July 1991. She
    has been President Emerita of Mills College since June
    1990. Dr. Metz has served as a director of SBC
    Communications, Inc. and its predecessors since July 1986,
    Pacific Gas & Electric Co. since March 1986, and Longs
    Drugs Stores since February 1991. Dr. Metz has been a
    director of the Company since November 1988.
 
Raymond E. Miles...............................................          65             -0-                1,214
  Professor Miles has been a Professor at the Haas School of
    Business at the University of California in Berkeley since
    July 1963. He served as a director of the former BanCal
    Tri-State Corporation and the former Bank of California,
    N.A. from January 1987 to March 1996. He has served as a
    director of Granite Construction Co., Inc., since May 1988.
    Professor Miles has been a director of the Company since
    April 1996.
</TABLE>
 
                                       6
<PAGE>
<TABLE>
<CAPTION>
                                                                                                      SHARES OF
                                                                              SHARES OF COMMON   COMMON STOCK OF THE
                                                                                  STOCK OF             BANK OF
                                                                                 UNIONBANCAL      TOKYO-MITSUBISHI,
                                                                              CORPORATION OWNED          LTD.
                NAME AND PRINCIPAL OCCUPATIONS                                 BENEFICIALLY AS    OWNED BENEFICIALLY
                  DURING THE LAST FIVE YEARS                                         OF                 AS OF
                   OF NOMINEES FOR DIRECTOR                          AGE       MARCH 31, 1998+     MARCH 31, 1998++
- ---------------------------------------------------------------  -----------  -----------------  --------------------
<S>                                                              <C>          <C>                <C>
Takahiro Moriguchi.............................................          53           2,000(1)             6,400
  Mr. Moriguchi has served as President and Chief Executive
    Officer of the Company and the Bank since May 1997. He
    served as Vice Chairman and Chief Financial Officer of the
    Company and the Bank from April 1996 to May 1997. He served
    as Vice Chairman and Chief Financial Officer of the former
    Union Bank from June 1993 until March 1996. He served as
    General Manager of the former Bank of Tokyo, Ltd.'s Capital
    Markets Division 2 from May 1992 to May 1993. He has served
    as a director of The Bank of Tokyo-Mitsubishi, Ltd. since
    April 1996 and as a director of the former Bank of Tokyo,
    Ltd. prior thereto. Mr. Moriguchi has served as a director
    of the Company since June 1993.
 
J. Fernando Niebla.............................................          58              50                  105(7)
  Mr. Niebla has served as Chairman and Chief Executive Officer
    of Infotec Commercial Systems since December 1995. From
    September 1979 to June 1996, he served as Chairman and
    Chief Executive Officer of Infotec Development, Inc. He
    served as a director of the former BanCal Tri-State
    Corporation and the former Bank of California, N.A. from
    July 1994 through March 1996. Mr. Niebla has been a
    director of the Company since April 1996.
 
Minoru Noda....................................................          51             -0-                5,334
  Mr. Noda has served as Deputy Chairman, Chief Financial
    Officer and Chief Credit Officer of the Company since May
    1997. He served as Vice Chairman and Chief Credit Officer
    of the Company from April 1996 to May 1997. He served as
    Vice Chairman, Credit and Finance, and Director of the
    former BanCal Tri-State Corporation and the former Bank of
    California, N.A. from August 1993 until March 1996. He
    served as Executive Vice President for Regional Banking of
    the former Bank of California, N.A. from July 1992 through
    June 1993. Mr. Noda has served as a director of the Company
    since April 1996.
</TABLE>
 
                                       7
<PAGE>
<TABLE>
<CAPTION>
                                                                                                      SHARES OF
                                                                              SHARES OF COMMON   COMMON STOCK OF THE
                                                                                  STOCK OF             BANK OF
                                                                                 UNIONBANCAL      TOKYO-MITSUBISHI,
                                                                              CORPORATION OWNED          LTD.
                NAME AND PRINCIPAL OCCUPATIONS                                 BENEFICIALLY AS    OWNED BENEFICIALLY
                  DURING THE LAST FIVE YEARS                                         OF                 AS OF
                   OF NOMINEES FOR DIRECTOR                          AGE       MARCH 31, 1998+     MARCH 31, 1998++
- ---------------------------------------------------------------  -----------  -----------------  --------------------
<S>                                                              <C>          <C>                <C>
Sidney R. Petersen.............................................          67             732(3)               -0-
  Mr. Petersen has been a consultant and private investor since
    August 1984. He served as Chairman and Chief Executive
    Officer of Getty Oil Company until his retirement in July
    1984. He has been a director of Avery Dennison Corporation
    since December 1981; NICOR, Inc. since May 1987; Group
    Technologies Corporation since June 1994; and, Seagull
    Energy Corporation since October 1996. Mr. Petersen has
    been a director of the Company since November 1988.
 
Carl W. Robertson..............................................          61             -0-                1,250
  Mr. Robertson has been the Managing Director of Warland
    Investments Company since January 1985. He served as a
    director of the former BanCal Tri-State Corporation and the
    former Bank of California, N.A. from April 1975 to March
    1996. Mr. Robertson has been a director of the Company
    since April 1996.
 
Tetsuo Shimura.................................................          59             -0-               18,630
  Mr. Shimura has been Chairman of the Board of the Bank of
    Tokyo-Mitsubishi Trust Company and Chief Executive Officer
    of The Bank of Tokyo-Mitsubishi, Ltd. North American
    Headquarters since June 1997 and a Managing Director of The
    Bank of Tokyo-Mitsubishi since April 1996. He served as
    Managing Director of the former Bank of Tokyo from June
    1993 to April 1996 and as Director and General Manager of
    the former Bank of Tokyo Funds and Foreign Exchange
    Division from June 1991 to June 1993. Mr. Shimura has been
    a director of the Company since June 1997.
 
Henry T. Swigert...............................................          67             -0-                5,250(7)(8)
  Mr. Swigert has served as Chairman of ESCO Corporation since
    January 1979. From April 1989 until April 1996, he served
    as a director of the former BanCal Tri-State Corporation
    and the former Bank of California, N.A. Mr. Swigert has
    been a director of the Company since April 1996.
</TABLE>
 
                                       8
<PAGE>
<TABLE>
<CAPTION>
                                                                                                      SHARES OF
                                                                              SHARES OF COMMON   COMMON STOCK OF THE
                                                                                  STOCK OF             BANK OF
                                                                                 UNIONBANCAL      TOKYO-MITSUBISHI,
                                                                              CORPORATION OWNED          LTD.
                NAME AND PRINCIPAL OCCUPATIONS                                 BENEFICIALLY AS    OWNED BENEFICIALLY
                  DURING THE LAST FIVE YEARS                                         OF                 AS OF
                   OF NOMINEES FOR DIRECTOR                          AGE       MARCH 31, 1998+     MARCH 31, 1998++
- ---------------------------------------------------------------  -----------  -----------------  --------------------
<S>                                                              <C>          <C>                <C>
Tsuneo Wakai...................................................          72             -0-               69,559
  Mr. Wakai has been the Senior Advisor of The Bank of
    Tokyo-Mitsubishi, Ltd. since January 1998. Prior thereto,
    he was Chairman of the Board of The Bank of
    Tokyo-Mitsubishi, Ltd. from April 1996 through December
    1997, and the President of the former Mitsubishi Bank, Ltd.
    from June 1990 through March 1996. Mr. Wakai has been a
    director of the Company since April 1996.
 
Robert M. Walker...............................................          56          56,400(5)(6)             -0-
  Mr. Walker has served as Vice Chairman of the Commercial
    Financial Services Group for the Company and the Bank since
    April 1996 and head of the Corporate and Real Estate
    Banking Group for the Company and the Bank since July 1996.
    He served as Vice Chairman in the same position with the
    former Union Bank from July 1992 until March 1996. He has
    served as a director of the Company since July 1992.
 
Blenda J. Wilson...............................................          57             200                  -0-
  Dr. Wilson has served as the President of California State
    University, Northridge since September 1992. She is the
    former Chancellor of the University of Michigan-Dearborn.
    Dr. Wilson has been a director of the Company since July
    1993.
 
Tamotsu Yamaguchi..............................................          67           5,837(4)             5,795
  Mr. Yamaguchi has served as Chairman of the Company and the
    Bank since April 1996. He served as Chairman of the former
    Union Bank from September 1992 until March 1996. Mr.
    Yamaguchi has served as a director of the Company since
    September 1992.
</TABLE>
 
                                       9
<PAGE>
<TABLE>
<CAPTION>
                                                                                                      SHARES OF
                                                                              SHARES OF COMMON   COMMON STOCK OF THE
                                                                                  STOCK OF             BANK OF
                                                                                 UNIONBANCAL      TOKYO-MITSUBISHI,
                                                                              CORPORATION OWNED          LTD.
                NAME AND PRINCIPAL OCCUPATIONS                                 BENEFICIALLY AS    OWNED BENEFICIALLY
                  DURING THE LAST FIVE YEARS                                         OF                 AS OF
                   OF NOMINEES FOR DIRECTOR                          AGE       MARCH 31, 1998+     MARCH 31, 1998++
- ---------------------------------------------------------------  -----------  -----------------  --------------------
<S>                                                              <C>          <C>                <C>
Kenji Yoshizawa................................................          66             221(1)            43,858
  Mr. Yoshizawa has served as the Deputy President and director
    of The Bank of Tokyo-Mitsubishi, Ltd. since April 1996. He
    served as Deputy President and director of the former Bank
    of Tokyo, Ltd. from June 1990 through March 1996. He served
    as Chairman and Chief Executive Officer of The Bank of
    Tokyo Trust Company from September 1989 to September 1990.
    He also served as a Senior Managing Director and Managing
    Director of the former Bank of Tokyo, Ltd. from April 1986
    to June 1990. Mr. Yoshizawa has been a director of the
    Company since September 1989.
 
All directors and executive officers as a group (28
  persons):(1)(2)(4)(5)(6)                                                          182,459              161,223
</TABLE>
 
- ------------------------
 
+   All mention of UnionBanCal Corporation stock refers to shares of Common
    Stock.
 
++  As of March 31, 1998, there were 4,675,455,546 shares outstanding of Common
    Stock of the Bank of Tokyo-Mitsubishi, Ltd.
1   The 44,251,991 shares of Company Common Stock owned by BTM as of March 31,
    1998, do not include the shares of Company Common Stock owned by Takahiro
    Moriguchi, Kenji Yoshizawa and executive officers of the Company who are
    associated as officers or directors of BTM.
2   All shares of Common Stock of the Company and BTM are held directly by the
    directors and executive officers of the Company and BTM, unless otherwise
    indicated. No director or executive officer of the Company or BTM,
    individually or as a group, owns beneficially more than 1% of the
    outstanding shares of Common Stock of the Company or BTM.
 
3   Of the 500 shares, 200 shares are owned by the Hancock Family Trust of which
    Jack L. Hancock and Patricia B. Hancock are trustees. Of the 1,487 shares,
    1,287 shares are owned by the Harry W. Low and Mayling J. Low Trust of which
    Harry W. Low and Mayling J. Low are trustees. Of the 400 shares, 50 shares
    are owned by the Mary S. Metz Trust of which Mary S. Metz is a trustee. The
    732 shares are owned by the Petersen Family Trust of which Sidney R.
    Petersen and Nancy M. Petersen are trustees.
4   The shares indicated under the Company column include the following shares
    held by the Trustee of the Union Bank of California 401(k) Plan as of March
    31, 1998, in the accounts for any named individual and the group as a whole:
 
<TABLE>
<CAPTION>
<S>                                                                                    <C>
Tamotsu Yamaguchi....................................................................        887
Executive Officers as a group........................................................      7,192
</TABLE>
 
5   The shares indicated under the Company column includes the following shares
    of restricted stock granted from the inception of the Management Stock Plan
    in 1990 through March 31, 1998, to and held by the named individuals and the
    group as a whole:
 
<TABLE>
<CAPTION>
<S>                                                                                   <C>
Richard C. Hartnack.................................................................     23,900
Robert M. Walker....................................................................     13,400
Executive Officers as a group.......................................................     48,885
</TABLE>
 
                                       10
<PAGE>
6   The shares indicated under the Company column include the following shares
    of stock options granted from the inception of the Management Stock Plan in
    1990 through March 31, 1998, to and exercisable by the named individuals and
    the group as a whole:
 
<TABLE>
<CAPTION>
<S>                                                                                    <C>
Richard C. Hartnack..................................................................     10,667
Robert M. Walker.....................................................................     30,666
Executive Officers as a group........................................................     69,031
</TABLE>
 
7   The shares indicated are held as American Depositary Shares, each of which
    represents one share of BTM Common Stock.
8   The shares indicated include 5,250 American Depositary Shares held by the
    Henry T. Swigert Trust, each of which represents one share of BTM Common
    Stock.
 
                                       11
<PAGE>
 II. APPROVAL OF AMENDMENT AND RESTATEMENT OF THE ARTICLES OF INCORPORATION OF
                            UNIONBANCAL CORPORATION
 
    The Board of Directors recommends a vote FOR approval of the amended and
restated Articles of Incorporation of the Company to eliminate cumulative voting
for the election of directors and to eliminate provisions relating to preferred
stock that is no longer outstanding. The text of the proposed Amended and
Restated Articles of Incorporation is attached as Exhibit A to this Proxy
Statement.
 
ELIMINATION OF CUMULATIVE VOTING
 
    The California General Corporation Law (the "CGCL") provides for the
availability of cumulative voting for the election of directors unless a
qualifying corporation eliminates cumulative voting in its articles of
incorporation. In cumulating votes for directors, each shareholder is entitled
to as many votes as is equal to the number of directors to be elected,
multiplied by the number of shares held by the shareholder, and all such votes
may be cast for a single director or be distributed among the number of
directors to be elected as the shareholder may see fit. No shareholder is
entitled to cumulate votes for any candidate unless such candidate's name has
been placed in nomination prior to commencement of the voting and any
shareholder has given notice at the meeting prior to the commencement of the
voting of the shareholder's intention to cumulative votes.
 
    Subject to shareholder approval, Section 301.5 of the CGCL specifically
allows "listed corporations" to eliminate cumulative voting. The Company is a
"listed corporation" for these purposes because its Common Stock is qualified
for trading on the Nasdaq National Market and there were over 800 shareholders
of record of the Company's Common Stock as of the record date of the Company's
most recent annual meeting of shareholders.
 
    By permitting shareholders of "listed corporations" to eliminate cumulative
voting and to provide for majority rule in electing directors, the CGCL
substantially conforms California law with the corporate laws of a majority of
other states (including Delaware, Illinois, Michigan, New Jersey, New York,
Ohio, Pennsylvania and Texas), which either provide that cumulative voting is
optional or make no provision for cumulative voting at all.
 
    The Board of Directors of the Company believes that cumulative voting is not
an appropriate method of corporate governance for the Company.
 
    Under cumulative voting, shareholders representing a relatively small number
of voting shares have the power to nominate and elect one or more directors. For
example, if twenty directors are to be elected at an annual meeting,
shareholders holding approximately 5% of the voting shares could nominate and
elect one director by casting all of their shares, multiplied by the number of
directors to be elected, for a single candidate. This would result even if
shareholders holding approximately 95% of the voting shares were opposed to the
election of that candidate and cast their votes to elect twenty other directors.
 
    With majority rule voting, a nominee could not be elected without relatively
wide support. Under majority rule voting, shareholders are entitled to vote only
one vote per share in connection with the election of directors and each
director is voted on separately. Consequently, the only director candidates who
could be elected are those who receive support from a majority of shares voting,
and the shareholders holding in excess of 50% of the voting shares would be able
to elect all of the directors. Because BTM holds 80.54% of the Common Stock, BTM
would have the power to elect all of the directors of the Company. Approval of
the proposed amendment may therefore render more difficult any attempt by
minority shareholders to monitor, change or influence the management policies of
the Company.
 
    The Board of Directors of the Company believes that directors elected by a
minority shareholder or minority shareholder group through cumulative voting are
likely to be partisans of the particular shareholder or group who elected them.
Such partisanship could disrupt the management of the Company and prevent it
from operating in the most effective manner. The election of directors who view
themselves as representative of, or answerable to, a minority constituency could
introduce an element of discord to the
 
                                       12
<PAGE>
Board of Directors, impair the ability of the Directors to work together
effectively, and discourage qualified individuals from serving as Directors of
the Company.
 
    The Board of Directors of the Company believes that the advantages of the
proposed amendment greatly outweigh the disadvantages and that the amendment is
in the best interests of the Company.
 
OTHER PROPOSED AMENDMENTS
 
    The Articles of Incorporation of the Company contain lengthy provisions
related to the rights, preferences and privileges of Auction Preferred Stock and
Money Market Cumulative Preferred Stock. The Company no longer has any such
preferred stock outstanding, and the Board of Directors does not currently
anticipate the issuance of any such preferred stock.
 
    In 1996, the Articles of Incorporation of the Company were amended in
various ways, including changing the name of the Company, increasing the number
of directors, changing the Company's purpose from banking to that of a general
corporation that acts as the holding company of the Bank, and deleting
provisions that were no longer necessary because the Company is no longer a
bank.
 
    The proposed amendment and restatement of the Articles of Incorporation
deletes the unused preferred stock language and restates the amended Articles of
Incorporation in a single, concise document.
 
    Approval of the proposed amendment and restatement of the Articles of
Incorporation of the Company requires the favorable vote of the holders of a
majority of the Company's Common Stock entitled to vote at the Annual Meeting.
 
           III. RATIFICATION OF THE SELECTION OF INDEPENDENT AUDITORS
 
    The Board of Directors recommends a vote FOR ratifying the selection of
Deloitte & Touche LLP as independent auditors for the Company.
 
    The Board has appointed Deloitte & Touche LLP as the Company's independent
auditors for the year ending December 31, 1998. The appointment was recommended
by the Audit and Examining Committee. Shareholders are being asked to ratify
this selection at the Annual Meeting. The firm of Deloitte & Touche LLP has
audited the accounts of the Company since 1996 and is considered well qualified.
Audit services include the annual audit examination, limited reviews of
unaudited quarterly financial data, assistance in filings with various
regulatory authorities and with the Annual Report to Shareholders, and
discussions regarding accounting principles and practices followed by the
Company in preparing its financial statements.
 
    Representatives of Deloitte & Touche LLP are expected to be present at the
Annual Meeting with the opportunity to make a statement if they desire to do so,
and are also expected to be available to answer questions.
 
                                       13
<PAGE>
       IV. COMPENSATION AND OTHER TRANSACTIONS WITH MANAGEMENT AND OTHERS
 
SUMMARY COMPENSATION TABLE
 
    The following table sets forth the compensation for the last three fiscal
years of the Chief Executive Officer of the Company, the former Chief Executive
Officer of the Company, and the four next most highly compensated executive
officers of the Company (other than the Chief Executive Officer) who served as
executive officers on December 31, 1997 ("named executive officers").
 
                         SUMMARY COMPENSATION TABLE(1)
<TABLE>
<CAPTION>
                                                               ANNUAL COMPENSATION
                                                 ------------------------------------------------
                                                                                      OTHER
                                                          ACTUAL                      ANNUAL
          NAME & PRINCIPAL POSITION              YEAR     SALARY      BONUS      COMPENSATION(2)
- ---------------------------------------------    ----    --------    --------    ----------------
<S>                                              <C>     <C>         <C>         <C>
Takahiro Moriguchi ..........................    1997(1) $378,785    $      0
  President and Chief                            1996    $433,258    $      0        $77,834
  Executive Officer                              1995    $434,903    $      0
 
Kanetaka Yoshida ............................    1997(1) $221,200    $      0        $59,902
  Former President and Chief Executive           1996    $480,083    $      0
  Officer                                        1995    $466,436    $      0
 
Tamotsu Yamaguchi ...........................    1997(1) $405,079    $      0
  Chairman of the Board                          1996    $418,912    $      0
                                                 1995    $453,452    $      0
 
Minoru Noda .................................    1997(1) $428,784    $      0
  Deputy Chairman of the Board, Chief            1996    $448,012    $      0
  Financial Officer, and Chief Credit Officer    1995    $431,051    $      0
 
Richard Hartnack ............................    1997(1) $353,842    $240,000
  Vice Chairman of the Board                     1996    $340,962    $138,000
                                                 1995    $326,538    $230,000
 
Robert Walker ...............................    1997(1) $353,842    $240,000
  Vice Chairman of the Board                     1996    $340,962    $138,000
                                                 1995    $325,269    $230,000
 
<CAPTION>
                                                            LONG-TERM COMPENSATION
                                                 --------------------------------------------
 
                                                             AWARDS
                                                 ------------------------------      PAYOUTS
                                                   RESTRICTED        SECURITIES     ---------
                                                  STOCK AWARDS       UNDERLYING     LONG-TERM        ALL OTHER
          NAME & PRINCIPAL POSITION               IN DOLLARS(3)       OPTIONS       INCENTIVES    COMPENSATION(4)
- ---------------------------------------------    ---------------     ----------     ---------     ----------------
<S>                                              <C>                 <C>            <C>           <C>
Takahiro Moriguchi ..........................       $      0              -0-            -0-           $    0
  President and Chief                               $      0              -0-            -0-           $    0
  Executive Officer                                 $      0              -0-            -0-           $    0
Kanetaka Yoshida ............................       $      0              -0-            -0-           $    0
  Former President and Chief Executive              $      0              -0-            -0-           $    0
  Officer                                           $      0              -0-            -0-           $    0
Tamotsu Yamaguchi ...........................       $      0              -0-            -0-           $5,106
  Chairman of the Board                             $      0              -0-            -0-           $4,838
                                                    $      0              -0-            -0-           $4,865
Minoru Noda .................................       $      0              -0-            -0-           $    0
  Deputy Chairman of the Board, Chief               $      0              -0-            -0-           $    0
  Financial Officer, and Chief Credit Officer       $      0              -0-            -0-           $    0
Richard Hartnack ............................       $ 53,100            5,000            -0-           $4,750
  Vice Chairman of the Board                        $ 32,925            6,000       $100,000           $4,500
                                                    $455,000           10,000            -0-           $1,500
Robert Walker ...............................       $ 53,100            5,000            -0-           $6,263
  Vice Chairman of the Board                        $ 32,925            6,000       $100,000           $6,193
                                                    $ 33,750           10,000            -0-           $4,385
</TABLE>
 
- ------------------------------
 
(1) Messrs. Moriguchi, Yoshida, Yamaguchi, and Noda are not eligible to receive
    restricted stock awards, stock option grants, performance share awards or
    the annual bonus paid in 1998 for 1997 performance. Their compensation takes
    into consideration the BTM Expatriate Pay Program; see "Executive
    Compensation and Benefits Committee Report on Executive
    Compensation--Overview, Policy Making Expatriate Officer Compensation, and
    Chief Executive Compensation."
 
    Mr. Yoshida was President and Chief Executive Officer until his resignation
    in May 1997. In May 1997, Mr. Moriguchi was elected President and Chief
    Executive Officer, and Mr. Noda was elected Deputy Chairman, Chief Financial
    Officer, and Chief Credit Officer.
 
    The data set forth in this table for the above six (6) officers includes all
    compensation awarded to, earned by or paid to them from any source for
    services rendered to the Company and its subsidiaries. Effective January 1,
    1998, the salaries of Messrs. Hartnack and Walker were each increased to
    $415,000.
 
(2) Perquisites or personal benefits provided to named executive officers in
    each of the years indicated did not exceed the lesser of $50,000 or 10% of
    annual salary and bonus except as indicated. The value of unused vacation
    benefits paid to Mr. Yoshida upon his retirement as President and Chief
    Executive Officer in 1997 was $47,224. The value of an initiation fee for a
    club membership paid for in the name of Mr. Moriguchi in 1996 was $46,476.
 
(3) The value listed for restricted stock awards was based on the market price
    of the Company's Common Stock at grant date. Mr. Hartnack was granted 800
    shares in 1997, 600 shares in 1996, and 11,000 shares in 1995, of restricted
    stock. Mr. Walker was granted 800 shares in 1997, 600 shares in 1996, and
    1,000 shares in 1995, of restricted stock.
 
    The aggregate value of restricted stock awards as of December 31, 1997, held
    by Mr. Hartnack was $752,500 and by Mr. Walker was $215,000 based on the
    market price on December 31, 1997. Each award granted to Messrs. Hartnack
    and Walker vests ratably over four years on the anniversary of the grant
    date for each award, except for the 1997 award which vests 100% on January
    1, 2000. As of December 31, 1997, the number of unvested shares of
    restricted stock awards held by Mr. Hartnack was 7,000 and by Mr. Walker,
    2,000. Program participants have the right to vote their restricted shares
    and receive dividends.
 
(4) Includes dollar value of match and stock discount contributions to the Union
    Bank of California 401(k) Plan.
 
                                       14
<PAGE>
STOCK OPTIONS
 
    The following tables summarize grants and exercises of options to purchase
Common Stock during 1997 to or by the named executive officers, and the grant
date present value of options held by such persons at the end of 1997. The
Company did not reprice any options during 1997 or any prior year, and did not
provide executives Stock Appreciation Rights (SARs). Officers who are
expatriates, including the Chairman; the President and Chief Executive Officer;
the former President and Chief Executive Officer; and the Deputy Chairman, Chief
Financial Officer and Chief Credit Officer, are not eligible to receive stock
options; please refer to the Executive Compensation and Benefits Committee
Report on Executive Compensation: Overview.
 
                  OPTION GRANTS IN LAST FISCAL YEAR (1997)(1)
 
<TABLE>
<CAPTION>
                                                            PERCENT OF TOTAL
                                    NUMBER OF SECURITIES   OPTIONS GRANTED TO
                                     UNDERLYING OPTIONS    EMPLOYEES IN FISCAL  EXERCISE   EXPIRATION      GRANT DATE
                                           GRANTED                YEAR            PRICE       DATE      PRESENT VALUE(2)
                                    ---------------------  -------------------  ---------  -----------  ----------------
<S>                                 <C>                    <C>                  <C>        <C>          <C>
Richard C. Hartnack...............            5,000                  3.4%       $  66.375      6/1/07     $    104,100
Robert M. Walker..................            5,000                  3.4%       $  66.375      6/1/07     $    104,100
</TABLE>
 
- ------------------------
 
(1) All options are nonqualified stock options to purchase shares of the
    Company's Common Stock. The exercise price of the options is 100% of the
    fair market value on the date the option was granted. Options are granted
    for a term of no more than ten (10) years. The options become exercisable
    PRO RATA over three (3) years from the grant date, subject to continuous
    employment or earlier forfeiture if the employment terminates.
 
(2) Estimated present value at grant date, based on the Black-Scholes option
    pricing model with assumptions applicable to the Company. The assumptions
    used in the model were projected volatility of 26%, risk free rate of return
    of 6.56%, annual dividend yield of 2.11%, and average time to exercise of 6
    years. The actual value, if any, an executive may realize will depend on the
    excess of the actual stock price over the exercise price on the date the
    option is exercised.
 
              AGGREGATED OPTION EXERCISES IN THE LAST FISCAL YEAR
                       AND FISCAL YEAR-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                                NUMBER OF SECURITIES
                                                                     UNDERLYING             VALUE OF UNEXERCISED
                                                               UNEXERCISED OPTIONS AT       IN-THE-MONEY OPTIONS
                                      SHARES                      FISCAL YEAR-END         AT FISCAL YEAR-END(1)(2)
                                    ACQUIRED ON    VALUE     --------------------------  ---------------------------
                                     EXERCISE     REALIZED   EXERCISABLE  UNEXERCISABLE  EXERCISABLE   UNEXERCISABLE
                                    -----------  ----------  -----------  -------------  ------------  -------------
<S>                                 <C>          <C>         <C>          <C>            <C>           <C>
Richard C. Hartnack...............      10,000   $  436,040       8,667        12,334    $    566,940   $   662,008
Robert M. Walker..................         -0-   $        0      28,666        12,334    $  2,096,868   $   662,008
</TABLE>
 
- ------------------------
 
(1) The exercise price of outstanding options for these officers ranges from
    $33.75 to $66.375.
 
(2) The value of options is calculated based on the amount by which the closing
    price of the stock ($107.50) as of the end of the last fiscal year, ended
    December 31, 1997, exceeds the exercise price.
 
                                       15
<PAGE>
LONG-TERM INCENTIVE PLAN
 
    The following table summarizes awards made during 1997 under the 1997
UnionBanCal Corporation Performance Share Plan to the named executive officers,
with estimated future payouts. Messrs. Hartnack and Walker each were awarded the
target number of 400 performance shares in 1997. Officers who are expatriates,
including the Chairman; the President and Chief Executive Officer; the former
President and Chief Executive Officer; and the Deputy Chairman, Chief Financial
Officer and Chief Credit Officer, are not eligible to receive Performance Share
Plan Awards; please refer to the Executive Compensation and Benefits Committee
Report on Executive Compensation: Overview.
 
            LONG-TERM INCENTIVE PLANS--AWARDS IN LAST FISCAL YEAR(1)
 
<TABLE>
<CAPTION>
                                                PERFORMANCE OR
                                                 OTHER PERIOD           ESTIMATED NUMBER OF SHARES
                                                    UNTIL              UNDER PERFORMANCE SHARE PLAN
                                                MATURATION OR   -------------------------------------------
                                                    PAYOUT       THRESHOLD (#)   TARGET (#)    MAXIMUM (#)
                                                --------------  ---------------  -----------  -------------
<S>                                             <C>             <C>              <C>          <C>
Richard C. Hartnack...........................     3 years             0                400           800
Robert M. Walker..............................     3 years             0                400           800
</TABLE>
 
- ------------------------
 
(1) Performance share awards shown in this table were granted in accordance with
    the 1997 UnionBanCal Corporation Performance Share Plan approved by the
    shareholders at the Annual Meeting, May 28, 1997. Under this plan,
    performance shares may be earned based on the Company's financial
    performance relative to its Peer Group. The value of a performance share
    will be equal to the average price of the Company's common stock during the
    final six (6) months of the performance period.
 
PENSION PLANS
 
    Prior to the merger, Union Bank maintained a defined benefit retirement
plan. Effective January 1, 1997, the Union Bank Retirement Plan was amended and
renamed the Union Bank of California Retirement Plan. Employees of the former
Bank of California N.A. entered the Union Bank of California Retirement Plan on
January 1, 1997. Their Bank of California N.A. service was used to determine
eligibility, vesting and early retirement entitlements. The definition of
earnings was expanded to include compensation received by a participant under
all incentive compensation programs, except long-term incentive compensation and
the Threshold Incentive Program, the Cash & Save Incentive Plan and similar
sales or referral awards programs which are not an integral or substantial part
of a participant's remuneration. Shift differentials were also included in the
earnings definition.
 
    Prior to the merger, The Bank of California, N.A. maintained a defined
contribution money purchase plan. Effective January 1, 1997, The Bank of
California, N.A. Personal Retirement Options Plan was terminated. The final
contribution was made for December 31, 1996, and all account balances became
fully vested.
 
    The following table indicates the estimated annual benefit payable to a
covered participant in the Union Bank of California Retirement Plan, retiring at
age 65, based on compensation and years of service to the Company, its
participating subsidiaries and certain affiliates. Employees covered by the
retirement plans of BTM, including Messrs. Moriguchi, Yoshida, and Noda are
excluded from participation. The amounts shown in the table reflect straight
life annuity amounts and do not reflect any Social Security offsets and have
been calculated without reference to the maximum limitations imposed by the
Internal Revenue Code of 1986, as amended (the "Code").
 
                                       16
<PAGE>
                               PENSION PLAN TABLE
 
<TABLE>
<CAPTION>
                                                                                           ANNUAL BENEFIT
                                                                                   -------------------------------
                                                                                         YEARS OF SERVICE(2)
                                                                                   -------------------------------
COMPENSATION(1)                                                                       10         20         30
- ---------------------------------------------------------------------------------  ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
100,000..........................................................................     20,000     40,000     60,000
200,000..........................................................................     40,000     80,000    120,000
300,000..........................................................................     60,000    120,000    180,000
400,000..........................................................................     80,000    160,000    240,000
500,000..........................................................................    100,000    200,000    300,000
600,000..........................................................................    120,000    240,000    360,000
</TABLE>
 
- ------------------------
 
(1) Compensation includes base salary only as of December 31, 1997, which was
    $357,000 for Mr. Hartnack, and $357,000 for Mr. Walker.
 
(2) As of December 31, 1997, Mr. Hartnack and Mr. Walker had 7 and 6 years of
    service, respectively.
 
    Benefits in excess of limitations imposed by the Code may be paid by the
Company through individual supplemental retirement contracts, or to certain
officers of the Company pursuant to its Supplemental Executive Retirement Plan.
The Union Bank Supplemental Executive Retirement Plan benefits were extended to
senior vice presidents and other senior executives of the former Union Bank,
including named executive officers of the Company, except Messsrs. Moriguchi,
Yoshida, and Noda, on November 17, 1995. The Supplemental Executive Retirement
Plan was amended on December 10, 1997, extending benefits to senior vice
presidents and other senior executives of Union Bank of California, N.A. Certain
officers of the pre-1988 Union Bank are participants in the Executive
Supplemental Benefit Plan which provides a benefit equal to 20% or 30% of the
officer's compensation, fixed at 1990 levels, payable for ten years. The
Executive Supplemental Benefit Plan has not been amended since the merger. The
Bank of California, N.A. Executive Supplemental Benefits Plan, which paid
benefits in excess of Code limits to a select group of executives, was
terminated January 1, 1997.
 
EMPLOYMENT AGREEMENTS
 
    Richard C. Hartnack entered into an Employment Agreement with the Company
when he began employment with the Company in 1991. Mr. Hartnack is entitled,
under certain circumstances, to severance benefits including continuation of his
salary for two years, and vesting in full of any prior restricted stock
award(s). Additionally, Mr. Hartnack will receive two pension supplements. The
first supplement will provide the actuarial equivalent of the extra amount Mr.
Hartnack would receive under the Union Bank of California Retirement Plan if the
limitations on benefits set forth in Sections 415 and 401(a)(17) of the Code did
not apply. The second supplement will provide the actuarial equivalent of the
extra amount Mr. Hartnack would receive if the Union Bank of California
Retirement Plan had taken into account Mr. Hartnack's nine previous years of
service with the First National Bank of Chicago. Both supplements will be
reduced by the actuarial equivalent of the lump sum distributions Mr. Hartnack
has received from the qualified and non-qualified plans of First National Bank
of Chicago. The Company is considering entering into a new employment agreement
with Mr. Hartnack effective January 1, 1998.
 
    Robert M. Walker entered into an Employment Agreement with the Company when
he began employment with the Bank in 1992. Mr. Walker is entitled, under certain
circumstances, to severance benefits consisting of continuation of his salary
for two years. Additionally, Mr. Walker will receive a supplemental pension
which will provide the actuarial equivalent of the extra amount Mr. Walker would
receive under the Retirement Plan if the limitations on benefits set forth in
Sections 415 and 401(a)(17) of the Code did not apply. This supplement also
credits Mr. Walker with a minimum of ten years of credited service upon vesting
in the Union Bank of California Retirement Plan. The Company is considering
entering into a new employment agreement with Mr. Walker effective January 1,
1998.
 
                                       17
<PAGE>
EXECUTIVE COMPENSATION AND BENEFITS COMMITTEE REPORT ON EXECUTIVE COMPENSATION
 
OVERVIEW
 
    The Company's Executive Compensation and Benefits Committee (the
"Committee") reviews and approves executive officer compensation criteria and
levels, as well as overseeing the Company's employee benefit plans. In response
to the merger between Union Bank and The Bank of California, N.A. in 1996, the
Company implemented refinements to its executive compensation programs in 1997.
These changes focus executives on the sustained creation of shareholder value of
the combined organization. In developing and monitoring these programs the
Committee and the Company employ the services of a nationally known executive
compensation consulting firm.
 
    For compensation purposes, the Company's executive officers are divided into
three groups: 1) executive officers of the Company named in the Summary
Compensation Table ("named executive officers"), including the Company's
Chairman, its President and Chief Executive Officer, its former President and
Chief Executive Officer, its Deputy Chairman, Chief Financial Officer and Chief
Credit Officer, and its two Vice Chairmen, 2) other policy making officers, who
are the eight Executive Vice Presidents who serve on the Executive Management
Committee, and 3) other Executive Vice Presidents and certain Senior Vice
Presidents with responsibility for matters that impact overall Company
performance.
 
    The Committee approves all elements of the Company's primary executive
compensation and benefits program specifically for the named executive officers
and the other policy making officers, and broadly oversees the design and
implementation of all executive incentive plans, subject to shareholder approval
where required and/or appropriate. The Committee receives reports from the
Company's management on all elements of the primary compensation and benefits
program for executives below the policy making level.
 
    Four of the named executive officers, Messrs. Moriguchi, Yoshida, Yamaguchi,
and Noda, plus two additional policy making officers, serve as executive
officers of the Company on a rotational assignment from BTM ("policy making
expatriate officers"). Accordingly, and as described below, during their tenure
at the Company their compensation and benefits are approved by the Committee,
taking into account the applicable compensation policies of BTM. None of the
policy making expatriate officers are eligible to receive annual bonuses,
restricted stock awards, stock option grants, or performance share awards. Some
compensation for services rendered to the Company is paid to the expatriate
named executive officers from BTM and reimbursed by the Company to BTM under a
Services Agreement. Such compensation is included in the Summary Compensation
Table above.
 
EXECUTIVE COMPENSATION PHILOSOPHY
 
    It is the Company's philosophy to compensate executives in a manner that
promotes the recruitment, motivation and retention of exceptional employees who
will help the Company achieve its strategic business objectives and who can
influence shareholder value.
 
    The Company's executive compensation philosophy is implemented through
compensation programs based upon the following principles:
 
    - In general, an executive's total compensation and benefits package should
      be positioned at median competitive levels, taking into account the
      relative responsibilities of the executives involved and reflecting the
      Company's performance against both its business plans and the performance
      of its peers. In particular, base salaries should be at the median level
      of competitive salaries, and incentives should relate to the Company's
      performance in comparison with the Company's business objectives and with
      peer group performance levels (see "Peer Group" below).
 
                                       18
<PAGE>
    - The total compensation and benefits package is designed to provide an
      appropriate mix of fixed and variable compensation to support a strong
      pay-for-performance relationship, subject to the special circumstances
      applicable to policy making expatriate officers.
 
    - Compensation and benefits programs are intended to promote teamwork and
      mutual support among the Company's executives.
 
    - Performance-based compensation is tied to performance measures that
      heavily influence shareholder value and which can be influenced by the
      Company's executives. These measures include both growth and returns.
 
    - Annual bonuses are based on the achievement of the Company's annual
      Financial Plan.
 
    - A long-term incentive program, including stock options granted at market
      value, restricted stock awards and long-term performance share awards is
      designed to encourage executive retention and link executive compensation
      directly to long term shareholder interests; the performance share awards
      component is based on the Company's performance compared to the
      performance of the specified peer group.
 
    - Compensation plans should be easy to understand and communicate.
 
PEER GROUP
 
    The Company uses a peer group of banks to compare all of the primary
elements of the executive officer compensation and benefits program. The
Company's current peer group includes 21 banks drawn from the 50 included in the
KBW 50 Index, published by Keefe, Bruyette & Woods, Inc. Of these, 18 are
compared on a variety of financial ratios and are used for the competitive
compensation analysis. Three additional banks, chosen on the basis of
geographic, market and direct competition criteria are also used for comparison
of compensation program design. The peer group was developed in part in
consultation with the consulting firm retained by the Company.
 
BASE SALARY
 
    Executive base salaries are established relative to comparable positions in
other banks, taking into account the relative responsibilities of the executives
involved. In general, the Company targets base salaries at the median
competitive levels to attract and retain highly experienced and qualified
executives. Where the responsibilities of executive positions in the Company
exceed those typically found among other banks or play a particularly critical
role at the Company, base salaries may be targeted above median competitive
levels. In determining salaries, the Committee also takes into account
individual leadership and vision, experience and performance, as well as
internal equity relative to other positions within the Company, and specific
issues particular to the Company and the position involved.
 
ANNUAL BONUSES
 
    The purpose of the annual bonus plan is to provide a median competitive
annual incentive opportunity at target performance levels. Target awards under
the plan represent the median of the competitive market for comparable executive
positions at banks of similar size and focus. Actual awards are determined based
on the performance of the Company and the individual participant.
 
    For 1997, participating executives were eligible to earn annual bonuses
under the Company's Senior Management Bonus Plan based on the Company's
achievement of predetermined return on assets and net income performance
objectives, as well as individual performance and contributions.
 
    For 1998, participants under the Senior Management Bonus Plan include all
Senior Vice Presidents and above with responsibility for matters that impact
overall Company performance (including the named executive officers other than
the four expatriate officers). Participants are assigned target bonuses
 
                                       19
<PAGE>
comparable to median competitive levels. The size of the bonus fund will be
based on the Company's performance on two measures: (1) return on assets, and
(2) net income, relative to the Company's 1998 Financial Plan. The bonus fund
size may vary up to two times aggregate target bonuses based on the Company's
performance on these two measures. In addition, the Committee may modify (i.e.,
increase or decrease) the bonus fund within certain limits based on the
Company's performance in other areas, including strategic and organizational
achievements, other financial measures, and relative performance against its
peers. Individual bonus awards will be based on individual performance and
contributions.
 
LONG TERM INCENTIVE PROGRAM
 
    The Company provides long-term incentive awards to individuals who can
directly impact the Company's long-term performance and value. Target awards are
comparable to median competitive levels. Eligible participants may receive
grants consisting of one or more types of long-term incentives, including stock
options, restricted stock, and performance shares. Grants are based on an
individual's scope and level of responsibilities within the Company and reflect
competitive practices for similar positions in peer companies. The performance
share awards are based on the Company's performance compared to the performance
of its peers.
 
STOCK OPTIONS AND RESTRICTED STOCK
 
    The Company believes in tying rewards for eligible executives directly to
the Company's long-term success and increases in shareholder value through stock
option grants and restricted stock awards. These also enable executives to
develop and maintain a stock ownership position of the Company's Common Stock.
The amounts of long-term incentives are targeted at median competitive levels
(taking into account the responsibilities of the officers involved). It is the
Company's intention to place greater emphasis on the use of stock options rather
than restricted stock in future incentive awards.
 
    The UnionBanCal Corporation Management Stock Plan ("Management Stock Plan")
authorizes the issuance of up to 2,200,000 shares of the Company's Common Stock
to certain employees of the Company and its subsidiaries as grants of stock
options and awards of restricted stock. The 2,200,000 share maximum represented
approximately four percent of the Company's Common Stock outstanding as of
December 31, 1997. Canceled or forfeited options and restricted stock become
available for future grants. Expatriate officers are not eligible to participate
in the Management Stock Plan.
 
    The Committee determines the term of each stock option grant, up to a
maximum of ten years from the date of grant. The exercise price must not be less
than the fair market value on the grant date. Options vest in thirds over three
years, provided that the employee has completed the specified continuous service
requirement, or earlier if the employee dies or is permanently and totally
disabled or retires under certain grant, age and service conditions.
 
    In general, awards of restricted stock vest in fourths over four years from
grant date, provided that the employee has completed the specified continuous
service requirement, or earlier if the employee dies or is permanently and
totally disabled or retires under certain grant, age and service conditions.
Restricted stockholders have the right to vote their restricted shares and to
receive dividends.
 
1997 UNIONBANCAL CORPORATION PERFORMANCE SHARE PLAN
 
    In 1997, the Company adopted the 1997 UnionBanCal Corporation Performance
Share Plan. Eligible participants may earn performance share awards to be
redeemed in cash three years after the date of grant. Performance shares are
linked to shareholder value in two ways: (1) the market price of the Company's
Common Stock, and (2) performance as measured on return on assets, a performance
measure closely linked to value creation.
 
                                       20
<PAGE>
    Eligible participants generally receive grants of performance shares
annually. The value of a performance share is equal to the market price of the
Company's Common Stock. The number of performance shares actually earned at the
end of the performance period will be based on the Company's percentile ranking
among its peer group in performance on return on assets. The Committee will set
performance goals and participants will only earn and be paid for performance
shares upon the attainment of such performance goals. A participant must be an
employee in good standing throughout the three year performance period, except
in the case of death, permanent disability, or retirement, in order to be
eligible for an award. Policy making expatriate officers do not participate in
this plan.
 
OTHER BENEFITS
 
    Certain executives are eligible to defer base salary and incentives and
outside directors are eligible to defer directors' fees for payment at a future
date designated by the executive under the Union Bank of California Deferred
Compensation Plan. The average Treasury Constant Maturities Rate, calculated
quarterly based on a rolling average for the previous 12 months, is credited on
deferred funds at the end of each calendar quarter.
 
    Selected executives, excluding policy making expatriate officers, are also
eligible for retirement benefits under supplemental plans designed to continue
coverage amounts otherwise limited under the qualified plan. Executives may also
be eligible for other benefits and perquisites.
 
POLICY MAKING EXPATRIATE OFFICER COMPENSATION
 
    Policy making expatriate officer compensation is approved by the Committee,
taking into account the BTM Expatriate Pay Program. The BTM Expatriate Pay
Program incorporates a number of different elements, including overseas base
salary, certain allowances, and tax gross up payments. The BTM Expatriate Pay
Program is a Japanese Yen based system and, as a result, exchange rate
fluctuations may yield significantly differing dollar denominated compensation
levels from year to year.
 
CHIEF EXECUTIVE OFFICER COMPENSATION
 
    The Chief Executive Officer's base salary is approved by the Committee,
taking into account the BTM Expatriate Pay Program, which the Committee reviews
in comparison with competitive bank chief executive officer compensation. His
compensation is therefore only indirectly related to the performance of the
Company from year to year. The Chief Executive Officer is also ineligible for
annual bonuses, stock option grants, restricted stock grants, and performance
share awards generally available to peer group chief executive officers and to
non-expatriate Company officers. However, the Committee believes that the Chief
Executive Officer's past performance and his long-term relationship with BTM
manifest ample motivation, notwithstanding his ineligibility for these
compensation programs.
 
DEDUCTIBILITY OF COMPENSATION
 
    Section 162(m) of the Internal Revenue Code of 1986, as amended (the
"Code"), limits the tax deductibility by a company of certain compensation in
excess of $1 million paid to the chief executive officer of the company or the
four most highly compensated officers. However, performance based compensation
is excluded from the $1 million limit.
 
    Compensation attributable to stock options under the Management Stock Plan
is treated as performance-based under Code Section 162(m) if (1) the grant is
made by the Committee, (2) the Management Stock Plan restricts the number of
shares for which options may be awarded to an executive during a specified
period, and (3) the compensation that the executive may receive is based solely
on an increase in the value of the stock after the date of grant. The 1997 Union
BanCal Corporation Performance Share Plan also is designed to provide
compensation which is treated as performance-based under Code Section 162(m).
Grants of
 
                                       21
<PAGE>
restricted stock under the Management Stock Plan are not considered
performance-based compensation under Code Section 162(m) of the Code and
Treasury Regulations promulgated thereunder.
 
    While the tax impact of any compensation arrangement is one factor to be
considered, such impact is evaluated in light of the Committee's overall
compensation philosophy. The Committee intends to establish executive officer
compensation programs which will maximize the Company's tax deductions, if the
Committee determines that such actions are consistent with its philosophy and in
the best interests of the Company and its shareholders. From time to time, the
Committee may award compensation which is not fully tax deductible if the
Committee determines that such award is consistent with its philosophy and in
the best interests of the Company and its shareholders.
 
                                          EXECUTIVE COMPENSATION AND
                                            BENEFITS COMMITTEE
 
                                          Richard D. Farman--Chairman
                                          Jack L. Hancock
                                          Carl W. Robertson
                                          Henry T. Swigert
 
                                       22
<PAGE>
                         COMMON STOCK PERFORMANCE GRAPH
 
    The following Common Stock Performance Graph compares the yearly percentage
change, on a dividend reinvested basis, in the cumulative total stockholder
return on the Common Stock with the cumulative total return of the Standard &
Poor's 500 Stock Index and the KBW 50 Index, published by Keefe, Bruyette &
Woods, Inc., for the five-year period commencing January 1, 1993. The stock
price performance depicted in the Performance Graph is not necessarily
indicative of future price performance.
 
                            UNIONBANCAL CORPORATION
                            COMPARISON OF FIVE YEAR
                           CUMULATIVE TOTAL RETURN(1)
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
             UNBC      KBW 50     S&P 500
<S>        <C>        <C>        <C>
1/1/93       $100.00    $100.00    $100.00
93Q1         $131.29    $107.48    $104.47
93Q2          $92.70    $107.28    $104.97
93Q3          $94.80    $110.42    $107.69
12/31/93      $90.75    $105.54    $110.18
94Q1          $98.40    $103.66    $106.00
94Q2         $108.90    $111.45    $106.45
94Q3         $113.95    $109.07    $111.65
12/31/94     $100.33    $100.16    $111.21
95Q1         $131.15    $113.57    $122.51
95Q2         $162.34    $129.81    $134.20
95Q3         $205.44    $150.70    $144.87
12/31/95     $211.84    $160.41    $153.59
96Q1         $215.75    $177.45    $161.83
96Q2         $209.27    $178.24    $169.09
96Q3         $197.28    $200.13    $174.32
12/31/96     $212.79    $226.91    $188.85
97Q1         $223.35    $237.44    $193.91
97Q2         $292.48    $272.81    $227.77
97Q3         $353.75    $313.45    $244.83
12/31/97     $441.85    $331.73    $251.86
</TABLE>
 
- ------------------------
 
(1) Assumes $100 invested on January 1, 1993, in Company Common Stock, S&P500
    Index and KBW50 Index and assumes quarterly dividend reinvestment.
 
TRANSACTIONS WITH MANAGEMENT AND OTHERS
 
    The Company and the Bank have had, and expect to have in the future, banking
and other transactions in the ordinary course of business with BTM and with its
affiliates and associates. During the year ending December 31, 1997, such
transactions included, but were not limited to, origination, participation,
servicing and remarketing of loans and leases, purchase and sale of acceptances
and interest rate derivatives, foreign exchange transactions, funds transfers,
custodianships, electronic data processing, investment advice and management,
deposits and trust services. In the opinion of management, such transactions
were made at prevailing rates, terms and conditions and do not involve more than
the normal risk of collectibility or present other unfavorable features.
 
    In addition, the Bank has had and expects in the future to have banking
transactions in the ordinary course of its business with many of the Company's
directors and executive officers and their associates, including transactions
with corporations and other entities of which such persons are directors,
officers or controlling shareholders, on substantially the same terms (including
interest rates and collateral) as those prevailing at the time for comparable
transactions with others. The loans included among such transactions do not
involve more than the normal risk of collectibility or present other unfavorable
features.
 
    Loans by the Bank to directors and executive officers of the Company and to
entities controlled by them are subject to limitations as to amount and purpose
as prescribed by the Federal Reserve Act. For
 
                                       23
<PAGE>
example, extensions of credit by the Bank in excess of $500,000 to directors and
executive officers of the Company and their related interests require the prior
approval of a majority of disinterested directors of the Bank. All extensions of
credit to such persons must be made on nonpreferential terms. In addition, the
Bank may not extend credit in excess of $100,000 to any executive officer of the
Bank, unless the purpose is to finance the education of the officer's children
or the purchase, construction, maintenance or improvement of the officer's
residence.
 
    Stanley F. Farrar, a director of the Company, has been a partner of Sullivan
& Cromwell since 1984. Sullivan & Cromwell provided services to the Company in
1997 in connection with various legal matters.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The following persons served as members of the Executive Compensation and
Benefits Committee during 1997: Richard D. Farman, Chairman; Jack L. Hancock;
Carl W. Robertson; and Henry T. Swigert. In the case of each such director
(except Jack L. Hancock), either the individual director, or an entity
controlled by the director had loans or other extensions of credit outstanding
from the Bank during 1997. These loans were made in the ordinary course of
business and on substantially the same terms, including interest rates and
collateral, as those prevailing at the time of comparable transactions with
other persons. Such loans did not involve more than the normal risk of
collectibility or present unfavorable features.
 
COMPLIANCE WITH SECTION 16(A) OF THE 1934 ACT
 
    Section 16(a) of the Securities Exchange Act of 1934, as amended, requires
the Company's directors, executive officers and holders of more than 10% of a
registered class of the Company's equity securities to file with the Securities
and Exchange Commission ("SEC") and Nasdaq reports of ownership and changes in
ownership of any equity securities of the Company. Officers, directors and
greater than ten percent (10%) shareholders are required by SEC regulation to
furnish the Company with copies of all Section 16(a) forms they file. Based
solely on its review of the copies of such forms received by it, or written
representations from certain reporting persons that all required forms were
filed, the Company believes that, during 1997, with the exception of Richard C.
Hartnack, who inadvertantly made a late filing, all Section 16 filing
requirements applicable to its officers and directors were complied with.
 
               V.  SHAREHOLDER PROPOSALS FOR 1999 PROXY STATEMENT
 
    Shareholders who expect to present a proposal at the 1999 Annual Meeting of
Shareholders for publication in the Company's proxy statement and action on the
proxy form for such meeting must submit their proposal by February 26, 1999. The
proposal must be mailed to the Corporate Secretary of the Company at 400
California Street, Mail Code 1-001-18, San Francisco, CA 94104.
 
                               VI.  OTHER MATTERS
 
    The Board of Directors does not know of any business to be presented for
action at the Annual Meeting other than that set forth in the Notice of Annual
Meeting of Shareholders. However, if other business properly comes before the
meeting, the persons named in the accompanying form of proxy intend to vote on
such matters in accordance with their best judgment.
 
                                          By Order of the Board of Directors,
 
                                                          [SIG]
 
                                          JEAN C. NOMURA
                                          CORPORATE SECRETARY
 
Dated: April 29, 1998
 
                                       24
<PAGE>
                                                                       EXHIBIT A
 
               AMENDED AND RESTATED ARTICLES OF INCORPORATION OF
                            UNIONBANCAL CORPORATION
 
                                   ARTICLE I
                                      NAME
 
    The name of the corporation is: UnionBanCal Corporation.
 
                                   ARTICLE II
                                    PURPOSE
 
    The purpose of the corporation is to engage in any lawful act or activity
for which a corporation may be organized under the General Corporation Law of
California other than the banking business, the trust company business or the
practice of a profession permitted to be incorporated by the California
Corporations Code.
 
                                  ARTICLE III
                                AUTHORIZED STOCK
 
    A. This corporation is authorized to issue two classes of stock designated
"Preferred Stock" and "Common Stock". The number of shares of Preferred Stock
authorized to be issued is 5,000,000 and the number of shares of Common Stock
authorized to be issued is 100,000,000.
 
    B.  The Preferred Stock may be divided into such number of series as the
Board of Directors may determine. The Board of Directors is authorized to
determine and alter the rights, preferences, privileges and restrictions granted
to or imposed upon any wholly unissued series of Preferred Stock and to fix the
number of shares of any series of Preferred Stock and the designation of any
such series of Preferred Stock. The Board of Directors, within the limits and
restrictions stated in any resolution or resolutions of the Board of Directors
originally fixing the number of shares constituting any series, may increase or
decrease (but not below the number of shares of such series then outstanding)
the number of shares of any series subsequent to the issue of shares of that
series. In case the number of shares of any series shall be so decreased, the
shares constituting such decrease shall resume the status which they had prior
to the adoption of the resolution originally fixing the number of shares of such
series.
 
                                   ARTICLE IV
                               CUMULATIVE VOTING
 
    No shareholder of this corporation shall be entitled to cumulate votes at
any election of directors of this corporation.
 
                                   ARTICLE V
                                   DIRECTORS
 
    The number of directors of this corporation shall not be less than sixteen
(16) nor more than thirty (30) until changed by an amendment of the Articles of
Incorporation. The exact number of directors within these limits shall be fixed
from time to time by a resolution duly adopted by the shareholders or by the
Board of Directors of this corporation. Said Directors shall have the right and
duty to conduct the affairs of this corporation and to otherwise regulate the
business and affairs of this corporation and the powers of the Directors and
shareholders in a manner not in conflict with law.
 
                                      A-1
<PAGE>
                                   ARTICLE VI
                                    ELECTION
 
    This corporation elects to be governed by all of the provisions of the
California General Corporation Law of 1977 not otherwise applicable to it under
Chapter 23 thereof.
 
                                  ARTICLE VII
                              DIRECTORS LIABILITY
 
    The liability of the directors of this corporation for monetary damages
shall be eliminated to the fullest extent permissible under California law. Any
repeal or modification of this Article VII, or the adoption of any provision of
the Articles of Incorporation inconsistent with this Article VII shall only be
prospective and shall not adversely affect the rights under this Article VII in
effect at the time of the alleged occurrence of any action or omission to act
giving rise to liability.
 
                                  ARTICLE VIII
                                INDEMNIFICATION
 
    This corporation is authorized to indemnify its agents (as defined in
Section 317 of the California Corporations Code) through Bylaw provisions,
agreements with agents, vote of shareholders or disinterested directors, or
otherwise, in excess of the indemnification otherwise permitted by Section 317
of the California Corporations Code, subject only to the applicable limits on
indemnification of directors and agents of the corporation set forth in Section
204 of the California Corporations Code with respect to actions for breach of a
duty to the corporation and its shareholders. Any repeal or modification of this
Article VIII, or the adoption of any provision of the Articles of Incorporation
inconsistent with this Article VIII, shall only be prospective and shall not
adversely affect the rights under this Article VIII in effect at the time of the
alleged occurrence of any action or omission to act giving rise to
indemnification.
 
                                      A-2
<PAGE>

                        UNIONBANCAL CORPORATION
              PROXY SOLICITED BY THE BOARD OF DIRECTORS
                     ANNUAL MEETING OF SHAREHOLDERS
                           MAY 27, 1998

Minoru Noda and Yasuhiro Koyama, or either of them, each with the power of
substitution, is hereby authorized to represent and to vote the Common Stock of
the undersigned at the Annual Meeting of Shareholders of UnionBanCal
Corporation, to be held at 10:30 A.M. on Wednesday, May 27, 1998, at the
Mandarin Oriental Hotel, Embassy Room, 222 Sansome Street, San Francisco,
California, or any adjournment thereof as follows:

THIS PROXY WILL BE VOTED IN ACCORDANCE WITH THE SPECIFICATIONS MADE ON THE 
REVERSE SIDE, BUT IF NO CHOICES ARE INDICATED, THIS PROXY WILL BE VOTED FOR 
ALL NOMINEES LISTED ON THE REVERSE SIDE, FOR PROPOSALS 2 AND 3, AND, WITH 
RESPECT TO ANY OTHER BUSINESS AS MAY PROPERLY COME BEFORE THE MEETING OR ANY 
ADJOURNMENT THEREOF, IN ACCORDANCE WITH THE DISCRETION OF THE PROXIES.

<PAGE>

                          UNIONBANCAL CORPORATION
  PLEASE MARK VOTE IN OVAL IN THE FOLLOWING MANNER USING DARK INK ONLY /X/

1.   ELECTION OF DIRECTORS:

R. Farman, S. Farrar, H. Gallegos, J. Hancock,
R. Hartnack, H. Low, M. Metz, R. Miles, T. Moriguchi,
J. Niebla, M. Noda, S. Petersen, C. Robertson,
T. Shimura, H. Swigert, T. Wakai, R. Walker,
B. Wilson, T. Yamaguchi, and K. Yoshizawa.

(INSTRUCTIONS: to withhold authority to vote for any individual nominee,
write such names or name in the space provided below.)

- --------------------------------------------------------------------------


FOR all nominees listed below (except as listed to the contrary) / /

WITHHOLD AUTHORITY to vote FOR all nominees listed below  / /

2.   Proposal to approve the amendment and restatement of the Articles of
Incorporation of UnionBanCal Corporation to eliminate cumulative voting for the
election of directors and to eliminate provisions relating to preferred stock
that is no longer outstanding.

For  / /    Against  / /    Abstain  / /

3.   Proposal to ratify the selection of Deloitte & Touche LLP as independent
auditors for UnionBanCal Corporation for the year ending December 31, 1998.

For  / /    Against  / /    Abstain  / /

This proxy will be voted as specified, or if no choice is specified, will be
voted FOR proposals 1, 2, and 3.

Dated___________________________, 1998

- --------------------------------------
             Signature

- --------------------------------------
    Signature, if held jointly


(Please sign EXACTLY as your name appears on your stock certificate and this 
proxy. Executors, administrators, trustees, guardians, attorneys, etc., 
should give their full title. If signer is a corporation, please give full 
corporate name and sign by a duly authorized officer, stating the officer's 
title. If a partnership, please sign in partnership name by authorized 
person.)



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