Sec Form 4 Filing - SINGER DAVID B @ Seer, Inc. - 2020-12-03

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person SINGER DAVID B 2. Issuer Name and Ticker or Trading Symbol Seer, Inc. [ SEER] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) ONE LETTERMAN DRIVE, BUILDING D,, SUITE DM100 3. Date of Earliest Transaction (MM/DD/YY) 12/03/2020 (Street) SAN FRANCISCO, CA94129 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option (right to buy) $ 19 12/03/2020 A 37,383 ( 1 ) 12/03/2020 Class A Common Stock 37,383 $ 0 37,383 D ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other SINGER DAVID B ONE LETTERMAN DRIVE, BUILDING D, SUITE DM100 SAN FRANCISCO, CA94129 X X Signatures /s/ David Singer 12/11/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares subject to the option vest in 36 equal monthly installments beginning on January 3, 2021. ( 2 )The reporting person is a Managing Partner of Maverick Capital Ventures, LLC (Maverick Ventures), the general partner of Maverick Ventures Investment Fund, L.P. and Maverick Advisors Fund, L.P. The reporting person is deemed to hold the reported stock option for the benefit of the Maverick Ventures, which entity is entitled to the shares of Class A Common Stock issued upon exercise. Maverick Ventures may be deemed the indirect beneficial owner of this stock option, and the reporting person may be deemed the indirect beneficial owner of the option through his indirect interest in Maverick Ventures. The reporting person disclaims beneficial ownership of the stock option except to the extent of his pecuniary interest therein.

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 4(b)(v).

** 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 is insufficient, see Instruction 6 for procedure.
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