| 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*
(Street)
| 2. Date of Event Requiring Statement
(Month/Day/Year) 10/01/2026 | 3. Issuer Name and Ticker or Trading Symbol
Seer, Inc. [ SEER ] Foreign Trading Symbol | |||||||||||||
| 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
| 5. If Amendment, Date of Original Filed
(Month/Day/Year) | ||||||||||||||
6. Individual or Joint/Group Filing (Check Applicable Line)
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| 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 5 (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. | ||
| Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number. | ||
POWER OF ATTORNEY
The undersigned, as a Section 16 reporting person of Seer, Inc. (the “Company”), hereby constitutes and appoints Omid Farokhzad, M.D. and Marissa Dixon, and each of them, as the undersigned’s true and lawful attorney-in-fact to:
1.
complete and execute Forms 3, 4 and 5 and other forms and all amendments thereto as such attorney-in-fact shall in his discretion determine to be required or advisable pursuant to Section 16 of the Securities Exchange Act of 1934 (as amended) and the rules and regulations promulgated thereunder, or any successor laws and regulations, as a consequence of the undersigned’s ownership, acquisition or disposition of securities of the Company; and
2.
do all acts necessary in order to file such forms with the SEC, any securities exchange or national association, the Company and such other person or agency as the attorneys-in-fact shall deem appropriate.
The undersigned hereby ratifies and confirms all that said attorneys-in-fact and agents shall do or cause to be done by virtue hereof. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned’s responsibilities to comply with Section 16 of the Securities Exchange Act of 1934 (as amended).
This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the Company and the foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 30 day of September, 2026.
Signature: /s/ Charles Endweiss______
Print Name: Charles Endweiss