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Sec Form 4 Filing - BAKER BROS. ADVISORS LP @ IGM Biosciences Inc. - 2021-02-19

  1. About Form 4 Filing: Every director, officer or owner of more than ten percent of a class of equity securities registered under Section 12 of the '34 Act must file with the U.S. Securities and Exchange Commission (SEC) a statement of ownership regarding such security. The initial filing is on Form 3 and changes are reported on Form 4. The Annual Statement of beneficial ownership of securities is on Form 5. The forms contain information on the reporting person's relationship to the company and on purchases and sales of such equity securities.
  2. Form 4 is stored in SEC's EDGAR database. EDGAR is Electronic Data Gathering, Analysis and Retrieval System. It is a registered trademark of the SEC.

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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 *
BAKER BROS. ADVISORS LP
2. Issuer Name and Ticker or Trading Symbol
IGM Biosciences, Inc. [ IGMS]
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)
860 WASHINGTON STREET, 3RD FLOOR
3. Date of Earliest Transaction (MM/DD/YY)
02/19/2021
(Street)
NEW YORK, NY10014
4. If Amendment, Date Original Filed (MM/DD/YY)
6. Individual or Joint/Group Filing (Check Applicable Line)
_____ Form filed by One Reporting Person
__ X __ 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
Non-Qualified Stock Option (right to buy) $ 91.5 02/19/2021 A 6,423 ( 1 ) 02/19/2031( 2 ) Common Stock 6,423 $ 0 6,423 I See Footnotes ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 )
Reporting Owners
Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
BAKER BROS. ADVISORS LP
860 WASHINGTON STREET
3RD FLOOR
NEW YORK, NY10014
X X
667, L.P.
860 WASHINGTON STREET, 3RD FLOOR
NEW YORK, NY10014
X X
Baker Bros. Advisors (GP) LLC
860 WASHINGTON STREET
3RD FLOOR
NEW YORK, NY10014
X X
Baker Brothers Life Sciences LP
860 WASHINGTON STREET
3RD FLOOR
NEW YORK, NY10014
X X
BAKER FELIX
860 WASHINGTON STREET
3RD FLOOR
NEW YORK, NY10014
X X
BAKER JULIAN
860 WASHINGTON STREET, 3RD FLOOR
NEW YORK, NY10014
X X
Signatures
By: Baker Bros. Advisors LP, Name: Scott L. Lessing, Title: President /s/ Scott L. Lessing 02/23/2021
** Signature of Reporting Person Date
Baker Bros. Advisors LP, Mgmt. Co. and Inv. Adviser to 667, L.P., pursuant to authority granted by Baker Biotech Capital, L.P., GP to 667, L.P. Name: Scott L. Lessing, Title: President /s/ Scott L. Lessing 02/23/2021
** Signature of Reporting Person Date
By: Baker Bros. Advisors (GP) LLC, Name: Scott L. Lessing, Title: President /s/ Scott L. Lessing 02/23/2021
** Signature of Reporting Person Date
Baker Bros. Advisors LP, Mgmt. Co. and Inv. Adviser to BAKER BROTHERS LIFE SCIENCES, L.P., pursuant to authority granted by Baker Brothers Life Sciences Capital, L.P., GP to Baker Brothers Life Sciences, L.P., Name: Scott L. Lessing, Title: President /s/ 02/23/2021
** Signature of Reporting Person Date
/s/ Felix J. Baker 02/23/2021
** Signature of Reporting Person Date
/s/ Julian C. Baker 02/23/2021
** Signature of Reporting Person Date
Explanation of Responses:
( 1 )6,423 non-qualified stock options ("Stock Options") exercisable solely into common stock ("Common Stock") of IGM Biosciences, Inc. (the "Issuer") were granted under the Issuer's Amended and Restated 2018 Omnibus Incentive Plan to Felix J. Baker, a managing member of Baker Bros. Advisors (GP) LLC (the "Adviser GP") in his capacity as a director of the Issuer. The Stock Options have a strike price of $91.50 per share, and 1/12 of such stock options vest each month following the Issuer's 2021 Annual Meeting of Stockholders ("2021 Annual Meeting"), subject to Felix J. Baker's continued service on the board of directors of the Issuer (the "Board"). However, if the Issuer's 2022 Annual Meeting of Stockholders is prior to the one-year anniversary of the 2021 Annual Meeting, the Stock Options will be fully vested as of such date.
( 2 )The Stock Options expire on February 19, 2031. Felix J. Baker serves on the Board as a representative of Baker Brothers Life Sciences, L.P. ("Life Sciences") and 667, L.P. ("667", and together with Life Sciences, the "Funds").
( 3 )Pursuant to the policies of Baker Bros. Advisors LP (the "Adviser"), Felix J. Baker does not have any right to any of the Issuer's securities issued as part of his service on the Board and the Funds are entitled to receive all the pecuniary interest in the securities issued. The Funds each own an indirect proportionate pecuniary interest in the Stock Options. Solely as a result of Felix J. Baker's and Julian C. Baker's ownership interests in (i) the general partners of the Funds and (ii) the Funds, Felix J. Baker and Julian C. Baker may be deemed to have an indirect pecuniary interest in the Stock Options (i.e. no direct pecuniary interest).
( 4 )The Adviser serves as the investment adviser to the Funds. In connection with the services provided by the Adviser, the Adviserreceives an asset-based management fee that does not confer any pecuniary interest in the securities held by the Funds. The Adviser GP is the Adviser's sole general partner. Julian C. Baker and Felix J. Baker are managing members of the Adviser GP. The Adviser has complete and unlimited discretion and authority with respect to the investment and voting power of the securities held by the Funds. The general partners of the Funds relinquished to the Adviser all discretion and authority with respect to the investment and voting power of the securities held by the Funds.
( 5 )Julian C. Baker, Felix J. Baker, the Adviser GP and the Adviser disclaim beneficial ownership of the securities held directly by the Funds except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that any of Julian C. Baker, Felix J. Baker, the Adviser GP or the Adviser is a beneficial owner of such securities for purposes of Section 16 or any other purpose.

Remarks:
Felix J. Baker, a managing member of Baker Bros. Advisors (GP) LLC (the "Adviser GP"), is a director of IGM Biosciences, Inc. (the "Issuer"). By virtue of their representation on the Board of Directors of the Issuer, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the reporting persons are deemed directors by deputization of the Issuer.

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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