FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person *
Endweiss Charles
(Last) (First) (Middle)
C/O SEER, INC.
3800 BRIDGE PARKWAY, SUITE 102
(Street)
REDWOOD CITY CA 94065
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
10/01/2026 		3. Issuer Name and Ticker or Trading Symbol
Seer, Inc. [ SEER ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
VP Financial Planning Analysis
 5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock 107,641 (1)
D
 
Common Stock 141
I
See footnote (2)
Common Stock 175
I
See footnote (3)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy)   (4) 01/06/2031 Common Stock 46,730 2 D  
Employee Stock Option (right to buy)   (4) 09/01/2031 Common Stock 10,578 2 D  
Employee Stock Option (right to buy)   (4) 02/08/2032 Common Stock 15,000 2 D  
Employee Stock Option (right to buy)   (5) 02/15/2033 Common Stock 21,250 2 D  
Employee Stock Option (right to buy)   (6) 02/06/2034 Common Stock 21,250 1.77 D  
Employee Stock Option (right to buy)   (7) 02/06/2035 Common Stock 21,250 2.33 D  
Employee Stock Option (right to buy)   (8) 02/03/2036 Common Stock 14,000 1.79 D  
Explanation of Responses:
1. Includes 43,149 shares represented by restricted stock units, or RSUs, which vest as follows: 2,656 RSUs vest in two equal quarterly installments beginning on November 15, 2026; 6,995 RSUs vest in six equal quarterly installments beginning on November 15, 2026; 7,968 RSUs vest in seven equal quarterly installments beginning on November 15, 2026; 13,280 RSUs vest in 10 equal quarterly installments beginning on November 15, 2026; and 12,250 RSUs vest in 14 equal installments beginning on November 15, 2026.
2. The shares are held in a custodial account for the reporting person's elder son.
3. The shares are held in a custodial account for the reporting person's younger son.
4. The shares underlying the option are fully vested are immediately exercisable.
5. One-fourth of the shares underlying the option vested on February 7, 2024 and the remaining shares vest in 36 equal monthly installments thereafter.
6. One-fourth of the shares underlying the option vested on February 6, 2025 and the remaining shares vest in 36 equal monthly installments thereafter.
7. One-fourth of the shares underlying the option vested on February 6, 2026 and the remaining shares vest in 36 equal monthly installments thereafter.
8. One-fourth of the shares underlying the option vest on February 3, 2027 and the remaining shares vest in 36 equal monthly installments thereafter.
Remarks:
Exhibit 24.1 - Power of Attorney
/s/ Charles Endweiss 10/08/2026
** Signature of Reporting Person Date
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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ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

ex24-10082026_091034.htm