HALIS JEFFREY S
SC 13D/A, 1999-05-27
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D. C. 20549

                                  SCHEDULE l3D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 5 )*

                            PRIMEX TECHNOLOGIES, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, par value $1.00 per share
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    741597108
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                                                    with a copy to:
                                                    Robert G. Minion, Esq.
Jeffrey S. Halis                                    Lowenstein Sandler PC
10 East 50th Street                                 65 Livingston Avenue
New York, New York  10022                           Roseland, New Jersey  07068
(212) 588-9697                                      (973) 597-2500

- --------------------------------------------------------------------------------
                       (Name, Address and Telephone Number
                         of Person Authorized to Receive
                           Notices and Communications)

                                  May 20, 1999
- --------------------------------------------------------------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement on Schedule l3G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), (f) or (g), check the following box [ ].

Note:  Six  copies of this  statement,  including all exhibits,  should be filed
with the  Commission.  See Rule l3d-7(b) for other parties to whom copies are to
be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).




                                       1
<PAGE>



                               CUSIP NO. 741597108
- --------------------------------------------------------------------------------
1)   Names of Reporting Persons I.R.S. Identification Nos. of Above Persons
     (entities only):

                  Jeffrey S. Halis

- --------------------------------------------------------------------------------
2)   Check the Appropriate Box if a Member of a Group (See Instructions):  N/A
                      (a) ___             (b) ___

- --------------------------------------------------------------------------------
3)    SEC Use Only

- --------------------------------------------------------------------------------
4)    Source of Funds (See Instructions):WC

- --------------------------------------------------------------------------------
5)    Check if Disclosure of Legal Proceedings is Required Pursuant to Items
      2(d) or 2(e):
                                  Not Applicable

- --------------------------------------------------------------------------------
6)    Citizenship or Place of Organization:  United States

- --------------------------------------------------------------------------------
       Number of             7)  Sole Voting Power:                     811,908*
                                 -----------------------------------------------
       Shares Beneficially   8)  Shared Voting Power:                         0
                                 -----------------------------------------------
       Owned by
       Each Reporting        9)  Sole Dispositive Power:                811,908*
                                 -----------------------------------------------
         Person   With:     10)  Shared Dispositive Power:                    0
                                 -----------------------------------------------

- --------------------------------------------------------------------------------
11)  Aggregate Amount Beneficially Owned by Each Reporting Person:

                811,908*

- --------------------------------------------------------------------------------
12)  Check if the  Aggregate  Amount in Row (11)  Excludes  Certain  Shares (See
     Instructions): Not Applicable

- --------------------------------------------------------------------------------
13)  Percent of Class Represented by Amount in Row (11):

                8.1%*
- --------------------------------------------------------------------------------
14)  Type of Reporting Person (See Instructions):  IA


- --------------------------------------------------------------------------------
*    500,288 shares (5.0%) of Primex  Technologies,  Inc. common stock are owned
     by Tyndall  Partners,  L.P., a Delaware  limited  partnership  ("Tyndall").
     161,460 shares (1.6%) of Primex  Technologies,  Inc. common stock are owned
     by Tyndall  Institutional  Partners,  L.P., a Delaware limited  partnership
     ("Tyndall  Institutional").  65,440 shares  (0.7%) of Primex  Technologies,
     Inc.  common stock are owned by Madison Avenue  Partners,  L.P., a Delaware
     limited   partnership   ("Madison").   84,720   shares   (0.8%)  of  Primex
     Technologies,  Inc. common stock are owned by Halo  International,  Ltd., a
     company organized under the laws of the Cayman Islands  ("Halo").  Pursuant
     to the  Agreement  of  Limited  Partnership  of  each of  Tyndall,  Tyndall
     Institutional, and Madison and the Investment Management Agreement of Halo,
     Jeffrey S. Halis  possesses  sole voting and  investment  control  over all
     securities owned by each of Tyndall,  Tyndall  Institutional,  Madison, and
     Halo,  respectively.  Jeffrey S.  Halis'  interest  in the shares set forth
     herein is limited  to the  extent of his  pecuniary  interest,  if any,  in
     Tyndall, Tyndall Institutional,  Madison and Halo, respectively. See Item 5
     for further information on the computation of percentages set forth herein.


                                       2
<PAGE>


Item 5.   Interest in Securities of the Issuer

          Based  upon  information  set  forth in  Primex  Technologies,  Inc.'s
quarterly report filed May 12, 1999, as of April 30, 1999, there were issued and
outstanding 10,051,918 shares of common stock of Primex Technologies, Inc. As of
May 26, 1999,  Tyndall  Partners,  L.P. owned 500,288 of such shares, or 5.0% of
those outstanding,  Tyndall Institutional  Partners,  L.P. owned 161,460 of such
shares, or 1.6% of those outstanding, Madison Avenue Partners, L.P. owned 65,440
of such shares, or 0.7% of those outstanding, and Halo International, Ltd. owned
84,720 of such shares,  or 0.8% of those  outstanding.  Jeffrey Halis  possesses
sole power to vote and direct the  disposition  of all shares of common stock of
Primex  Technologies,  Inc.  owned by each of Tyndall  Partners,  L.P.,  Tyndall
Institutional   Partners,   L.P.,   Madison  Avenue  Partners,   L.P.  and  Halo
International,  Ltd. The  following  table details the  transactions  by each of
Tyndall Partners,  L.P., Tyndall  Institutional  Partners,  L.P., Madison Avenue
Partners, L.P. and Halo International, Ltd., in shares of common stock of Primex
Technologies,  Inc. since the most recent filing of Schedule 13D Amendment No. 4
(each of which were effected in ordinary brokers transactions):

                            A. Tyndall Partners, L.P.

         Date                        Quantity                         Price

                                   (Purchases)

                                      NONE

                                     (Sales)

    April 20, 1999                    3,800                            $ 21.08
    April 23, 1999                   25,000                            $ 20.69
    April 26, 1999                      100                            $ 21.72
    April 27, 1999                    7,500                            $ 21.90
    April 29, 1999                      600                            $ 21.32
    April 29, 1999                    8,100                            $ 21.32
    May 6, 1999                      60,000                            $ 20.75
    May 6, 1999                       2,000                            $ 20.75
    May 18, 1999                     12,000                            $ 18.15
    May 19, 1999                     14,400                            $ 18.10


                                       3
<PAGE>

    May 20, 1999                     20,000                            $ 18.41
    May 20, 1999                     25,560                            $ 18.41
    May 20, 199                       3,040                            $ 18.41
    May 20, 1999                      5,560                            $ 18.41
    May 20, 1999                      4,440                            $ 18.41
    May 21, 1999                     10,300                            $ 19.00
    May 24, 1999                      4,200                            $ 18.87
    May 25, 1999                      2,000                            $ 19.00
    May 26, 1999                     10,000                            $ 18.87


                     B. Tyndall Institutional Partners, L.P.

         Date                        Quantity                           Price

                                   (Purchases)

                                      NONE

                                     (Sales)

    April 23, 1999                    6,000                            $ 20.69
    April 23, 1999                    4,400                            $ 20.69
    April 23, 1999                    6,600                            $ 20.69
    April 23, 1999                    6,000                            $ 20.69
    April 23, 1999                    2,000                            $ 20.69
    April 27, 1999                    2,000                            $ 21.90
    April 27, 1999                    5,600                            $ 21.90
    April 28, 1999                    1,100                            $ 21.67
    May 24, 1999                      1,500                            $ 18.87
    May 26, 1999                      3,500                            $ 18.87


                        C. Madison Avenue Partners, L.P.

         Date                       Quantity                             Price

                                   (Purchases)

                                      NONE

                                     (Sales)

    May 6, 1999                       8,200                            $ 20.75
    May 19, 1999                        400                            $ 18.10


                                       4
<PAGE>

    May 19, 1999                      2,600                            $ 18.10
    May 20, 1999                      1,400                            $ 18.41
    May 20, 1999                      4,400                            $ 18.41
    May 20, 1999                      5,200                            $ 18.41
    May 24, 1999                      1,500                            $ 18.87
    May 26, 1999                      3,000                            $ 18.87

                           D. Halo International, Ltd.

         Date                       Quantity                             Price

                                   (Purchases)

                                      NONE

                                     (Sales)

                                      NONE

                                    Signature

         After reasonable inquiry and to the best of the undersigned's knowledge
and belief,  the  undersigned  hereby certify that the  information set forth in
this statement is true, complete and correct.

                                         May 27, 1999


                                     /s/ Jeffrey S. Halis
                                         __________________
                                         Jeffrey S. Halis, as  a general partner
                                         partner of Halo Capital Partners, L.P.,
                                         the  general partner of each of Tyndall
                                         Partners, L.P., Tyndall Institutional
                                         Partners,  L.P., and Madison Avenue
                                         Partners, L.P.


                                    /s/  Jeffrey S. Halis
                                         __________________
                                         Jeffrey  S.  Halis, as a member of Jemi
                                         Management, L.L.C.,    the   Investment
                                         Manager for Halo International, Ltd.

            ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT
          CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).




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