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Seer awards Charles Endweiss options on 65,000 shares

The RSUs vest in four equal annual installments beginning November 15, 2027, while one-fourth of the option shares vest November 1, 2027, followed by 36 equal monthly installments.

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Form Type
4

Rhea-AI Filing Summary

Seer, Inc. VP Financial Planning Analysis Charles Endweiss received 35,000 restricted stock units (RSUs) and an option to acquire 65,000 Class A common shares on November 2, 2026. The option has a $1.73 exercise price and expires November 2, 2036. His reported direct Class A common stock holdings following the RSU award were 142,641 shares.

Insider Endweiss Charles
Role VP Financial Planning Analysis
Type Security Shares Price Value
Grant/Award Employee Stock Option (right to buy) F4 65,000 $0.00 $0.00
Grant/Award Class A Common Stock F1 35,000 $0.00 $0.00
Holding Class A Common Stock F2 -- -- --
Holding Class A Common Stock F3 -- -- --
Holdings After Transaction: Employee Stock Option (right to buy) — 65,000 contracts (Direct); Class A Common Stock — 142,641 shares (Direct); Class A Common Stock — 316 shares (Indirect, See footnote)
Holdings Before and After: Employee Stock Option (right to buy), 0 to 65,000 contracts (Direct); Class A Common Stock, 107,641 to 142,641 shares (Direct)
Footnotes (4)
  1. F1. The reported shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on November 15, 2027.
  2. F2. The shares are held in a custodial account for the reporting person's elder son.
  3. F3. The shares are held in a custodial account for the reporting person's younger son.
  4. F4. One-fourth of the shares underlying the option vest on November 1, 2027 and the remaining shares vest in 36 equal monthly installments thereafter.
RSUs awarded 35,000 RSUs Award reported November 2, 2026
Shares underlying option 65,000 shares Option award reported November 2, 2026
Option exercise price $1.73 per share Option award reported November 2, 2026
Direct Class A common stock holdings 142,641 shares Reported following the RSU award
RSU vesting schedule Four equal annual installments beginning November 15, 2027 RSUs awarded November 2, 2026
Option vesting schedule One-fourth on November 1, 2027; remaining shares in 36 equal monthly installments thereafter Option award reported November 2, 2026
Option expiration date November 2, 2036 Option award reported November 2, 2026
restricted stock units financial
"represented by restricted stock units, or RSUs"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
Employee Stock Option financial
"Employee Stock Option (right to buy)"
An employee stock option is a promise that lets a worker buy company shares later at a predetermined price, often after they stay for a certain period or meet performance goals — think of it like a coupon that locks in today's price for a future purchase. It matters to investors because options align employees’ incentives with company performance, can increase the number of shares outstanding (dilution) when exercised, and represent a compensation cost that affects reported profits and shareholder value.
exercise price financial
"65,000 shares underlying the option at a $1.73 exercise price"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
vesting financial
"vest in four equal annual installments beginning on November 15, 2027"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
custodial account financial
"held in a custodial account for the reporting person's elder son"
A custodial account is an investment or bank account opened and managed by an adult (the custodian) for the benefit of someone who cannot legally control assets, typically a minor. Think of it as a wallet held by a trusted guardian until the beneficiary reaches a legal age: it lets you save and invest on someone’s behalf, affects who makes decisions and who pays taxes, and determines when control of the assets transfers to the beneficiary—details investors watch for tax consequences, ownership rules, and timing of control.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

When do Charles Endweiss’s SEER RSUs and option shares vest?

The 35,000 RSUs vest in four equal annual installments beginning November 15, 2027. One-fourth of the 65,000 shares underlying the option vest on November 1, 2027, and the remaining shares vest in 36 equal monthly installments thereafter.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4
FORM 4UNITED 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
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
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*
Endweiss Charles

(Last)(First)(Middle)
C/O SEER, INC.
3800 BRIDGE PARKWAY, SUITE 102

(Street)
REDWOOD CITY CALIFORNIA 94065

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Seer, Inc. [ SEER ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
VP Financial Planning Analysis
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
11/02/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Class A Common Stock11/02/2026A35,000(1)A$0142,641D
Class A Common Stock141ISee footnote(2)
Class A Common Stock175ISee footnote(3)
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Employee Stock Option (right to buy)$1.7311/02/2026A65,000 (4)11/02/2036Class A Common Stock65,000$065,000D
Explanation of Responses:
1. The reported shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on November 15, 2027.
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. One-fourth of the shares underlying the option vest on November 1, 2027 and the remaining shares vest in 36 equal monthly installments thereafter.
/s/ Charles Endweiss11/04/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)

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