[Form 4] Seer, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Seer, Inc. (SEER) officer David R. Horn, who serves as President & CFO, reported a tax-related sale of company stock. On 11/19/2025, he sold 6,797 shares of Class A common stock at a price of $1.9714 per share. The filing notes that these shares were sold to satisfy his tax obligations arising from the vesting of restricted stock units. After this transaction, he beneficially owned 436,802 shares of Seer Class A common stock, held directly.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Horn David R.

(Last) (First) (Middle)

C/O SEER, INC.

3800 BRIDGE PARKWAY, SUITE 102

(Street)

REDWOOD CITY CA 94065

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Seer, Inc. [ SEER ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	PRESIDENT & CFO

3. Date of Earliest Transaction (Month/Day/Year)
11/19/2025

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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
Class A Common Stock	11/19/2025		S(1)		6,797	D	$1.9714	436,802	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

	/s/ David R. Horn	11/21/2025
	** 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.
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.

FAQ

What did Seer (SEER) report in this Form 4 filing?

The filing reports that President & CFO David R. Horn sold 6,797 shares of Seer, Inc. Class A common stock on 11/19/2025.

At what price were the Seer (SEER) shares sold by the CFO?

The 6,797 Seer Class A common shares were sold at a price of $1.9714 per share.

Why did Seer executive David R. Horn sell 6,797 shares?

The filing explains that the shares were sold to satisfy tax obligations related to the vesting of restricted stock units (RSUs).

How many Seer (SEER) shares does the CFO own after this transaction?

Following the reported sale, David R. Horn beneficially owned 436,802 shares of Seer Class A common stock, held directly.

What is the role of the reporting person in Seer, Inc. (SEER)?

The reporting person, David R. Horn, is an officer of Seer, Inc., serving as President & Chief Financial Officer.

Is this Seer (SEER) Form 4 filed by more than one reporting person?

No. The Form 4 indicates it is filed by one reporting person, David R. Horn.