UNITED STATES SEC USE ONLY
SECURITIES AND EXCHANGE COMMISSION DOCUMENT SEQUENCE NO.
Washington, D.C. 20549
FORM 144
NOTICE OF PROPOSED SALE OF SECURITIES
PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
ATTENTION: Transmit for filing 3 copies of this form concurrently with
either placing an order with a broker to execute sale or
executing a sale directly with a market maker
1(a) NAME OF ISSUER (Please type or print) (b) IRS IDENT. NO.(c) S.E.C. FILE NO.
Mercury Computer Systems, Inc. 04-2741391
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1(d) ADDRESS OF ISSUER STREET CITY STATE ZIP CODE (e) TELEPHONE NO.
199 Riverneck Road, Chelmsford, MA 01824 (978) 256-1300
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2(a)NAME OF PERSON FOR WHOSE (b)SOCIAL SECURITY (c)RELATIONSHIP (d) ADDRESS STREET CITY STATE ZIP CODE
ACCOUNT THE SECURITIES NO. OR IRS IDENT. TO ISSUER
ARE TO BE SOLD NO.
James R. Bertelli President 34 Powers Road Hollis NH 03049
Chief
Executive
Officer
INSTRUCTION: The person filing this notice should contact the issuer to obtain
the I.R.S. Identification Number and the S.E.C. File Number.
3(a) (b) SEC USE ONLY (c) (d) (e) (f) (g)
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Title of the Name and Address Broker-Dealer Number of Aggregate Number of Shares Approximate Name of Each
Class of of Each Broker File Number Shares or Market or Other Units Date of Sale Securities
Securities Through Whom the Other Units Value Outstanding (See instr. 3(f)) Exchange
to be Sold Securities are to be Sold See instr. (See instr. 3(e)) (MO. DAY YR.) (See instr. 3(g))
to Offered or (See instr. 3(d))
Each Market Maker 3(c))
who is Aquiring
the Securities
Common Morgan Stanley Dean 10,000 $517,500 21.48mm NASDAQ
Stock Witter
3 Copley Place, Suite 100
Boston, MA 02116
Francis J. Dietrich
INSTRUCTIONS
1. (a) Name of Issuer 3. (a) Title of the class of securities to be sold
(b) Issuer's I.R.S. Identification Number (b) Name and address of each broker through whom the securities are
(c) Issuer's S.E.C. number, if any intended to be sold
(d) Issuer's address, including zip code (c) Number of shares or other units to be sold (if debt
(e) Issuer's telephone number, including area code including securities, give the aggregate face amount)
(d) Aggregate market value of the securities to be sold as
2. (a) Name of person for whose account the securities of a specified date within 10 days prior to the filing of this
are to be sold notice
(b) Such persons Social Security or I.R.S.Identification (e) Number of shares or other units of the class outstanding, or
number if debt securities the face amount thereof outstanding, as
(c) Such person's relationship to the issuer (e.g., shown by the most recent report or statement published by the
officer, director, 10% stockholder, or member issuer
of immediate family of any of the foregoing) (f) Approximate date on which the securities are to be sold
(d) Such person's address, including zip code (g) Name of each securities exchange, if any, on which the
securities are intended to be sold number
SEC 1147 (9-93)
TABLE I - SECURITIES TO BE SOLD
Furnish the following information with respect to the acquisition of the
securities to be sold and with respect to the payment of all or any part of
the purchase price or other consideration therefor:
Name of Person
Title of Date You Nature of from Whom Acquired Amount of Date of
the Class Acquired Acquisition Transaction (If gift, also give date Securities Acquired Payment Nature of Payment
donor acquired)
Common 1/1/83 Founders stock Mercury Computer 800,000 N/A N/A
Stock Systems, Inc.
INSTRUCTIONS: 1. If the securities were purchased and full payment therefore was
not made in cash at the time of purchase, explain in the table or in a note
thereto the nature of the consideration given. If the consideration consisted of
any note or other obligation, or if payment was made in installments describe
the arrangement and state when the note or other obligation was discharged in
full or the last installment paid.
2. If within two years after the acquisition of the securities the person for
whose account they are to be sold had any short positions, put or other option
to dispose of securities referred to in paragraph (d)(3) of Rule 144, furnish
full information with respect thereto.
TABLE II - SECURITIES SOLD DURING THE PAST 3 MONTHS TABLE II
Furnish the following information as to all securities of the issuer sold during
the past 3 months by the person for whose account the securities are to be sold.
Amount of Gross
Name and Address of Seller Title of Securities Sold Date of Sale Securities Proceeds
James R. Bertelli
34 Powers Road
Hollis, NH 03049
REMARKS:
INSTRUCTIONS: ATTENTION:
See the definition of "person" in paragraph (a) of Rule 144. Information The person for whose account the securities
is to be given not only as to the person for whose account the securities to which this notice relates are to be sold
are to be sold but also as to all other peresons included in the definition. hereby represents by signing this notice that he
In addition, information shall be given as to sales by all persons whose does not know any material adverse information
sales are required by paragraph (e) of Rule 144 to be aggregated with sales in regard to the current and prospective
for the account of the person filing this notice. operations of the Issuer of the securities to be
sole which has not been publicly disclosed.
01/30/01 /s/ James R. Bertelli by
(DATE OF NOTICE) Anthony J. Medaglia, Jr., atty
(SIGNATURE)
The notice shall be signed by the person for whose account the securities are to
be sold. At least one copy of the notice shall be manually signed. Any copies
not manually signed shall bear typed or printed signatures.
ATTENTION: Intentional misstatements or omission of facts constitute
Federal Criminal Violations (See 18 U.S.C. 1001).
