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OMB APPROVAL
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OMB Number 3235-0104
Expires: September 30, 1998
Estimated average burden
hours per response ....... 0.5
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U.S. SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 3
INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934,
Section 17(a) of the Public Utility Holding Company Act of 1935 or
Section 30(f) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
Chasen, Steven
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(Last) (First) (Middle)
76 Country Club Circle
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(Street)
Pembroke, Massachusetts 02359
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(City) (State) (Zip)
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2. Date of Event Requiring Statement (Month/Day/Year)
7/99
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3. IRS or Social Security Number of Reporting Person (Voluntary)
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4. Issuer Name and Ticker or Trading Symbol
Mercury Computer Systems, Inc.
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5 Relationship of Reporting Person to Issuer
(Check all applicable)
[ ] Director [ ] 10% Owner
[ X ] Officer (give title below) [ ] Other (specify below)
Senior Vice President and General Manager, Operations
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6. If Amendment, Date of Original (Month/Year)
N/A
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7. Individual or joint/Group Filing (Check Applicable Line)
__X__ Form filed by One Reporting Person
_____ Form filed by More than One Reporting Person
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Table I -- Non-Derivative Securities Beneficially Owned
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3. Ownership Form:
2. Amount of Securities Direct (D) or
1. Title of Security Beneficially Owned Indirect (I) 4. Nature of Indirect Beneficial Ownership
(Instr. 4) (Instr. 4) (Instr. 5) (Instr.5)
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Common Stock 39,340 D
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Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly.
*If the form is filed by more than one reporting person, see Instruction 5(b)(v)
FORM 3 (continued)
Table II -- Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
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5. Owner-
3. Title and Amount of Securities ship
Underlying Derivative Security Form of
2. Date Exercisable (Instr. 4) Derivative
and Expiration Date --------------------------------- 4. Conver- Security:
(Month/Day/Year) Amount sion or Direct 7. Nature of
---------------------- or Exercise (D) or Indirect
Date Expira- Number Price of Indirect Beneficial
1. Title of Security Exer- tion of Derivative (I) Ownership
(Instr. 4) cisable Date Title Shares Security (Instr.5) (Instr. 5)
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Stock Option
(right to buy) (1) 7/30/06 Common 2,160 2.00 D
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Stock Option
(right to buy) (2) 9/19/06 Common 37,500 4.00 D
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Stock Option
(right to buy) (3) 9/28/08 Common 2,000 7.625 D
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Explanation of Responses:
(1) The option became exercisable as to 720 shares on July 30, 1999, and
becomes exercisable as to an additional 720 shares on each of July 30,
2001 and July 30, 2002.
(2) The option became exercisable as to 12,500 shares on October 20, 1999
and becomes exercisable as to an additional 12,500 shares on each of
October 20, 2000 and October 20, 2001.
(3) The option became exercisable as to 400 shares on September 28, 1999
and becomes exercisable as to an additional 400 shares on each of
September 28, 2000, September 28, 2001, September 28, 2002 and
September 20, 2003.
/s/Steven Chasen 11/10/00
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**Signature of Reporting Person Date
** Intentional misstatements or omissions of facts constitute Federal Criminal
Violations.
See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed.
If space provided is insufficient. See Instruction 6 for procedure.
