Key facts
- This page summarizes Charles Endweiss's Form 3 filing for Seer, Inc. (SEER).
- 0 reported transactions and 7 derivative rows are listed below.
- Accepted by SEC: 08 Oct 2026, 17:39.
Charles Endweiss - 01 Oct 2026 Form 3 Insider Report for Seer, Inc. (SEER)
- Reporting relationship
- VP Financial Planning Analysis
- Issuer ticker
- SEER
- Reported as of
- 01 Oct 2026
- Net transaction value
- $0
- Reporting owner signature
- /s/ Charles Endweiss
Source evidence
Original filing metadata and source links for verification.
3 source fields
Reporting owner
1 detail
Key filing fact
Charles Endweiss filed Form 3 for Seer, Inc. (SEER) on 08 Oct 2026.
Change
- No earlier filing in this sequence is available for direct comparison.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Official SEC source
View source filing
Ownership activity is grounded in SEC Form 3 disclosures.
Reporting Owners (1)
CIK 0002157949
Primary reporting owner
Endweiss Charles
- Relationship
- VP Financial Planning Analysis
- Address
- C/O SEER, INC., 3800 BRIDGE PARKWAY, SUITE 102, REDWOOD CITY
- Signature
- /s/ Charles Endweiss
- Signature date
- 08 Oct 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
SEER
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 107,641
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1
SEER
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 141
- Date
- 01 Oct 2026
- Ownership
- See footnote
- Footnotes
- F2
SEER
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 175
- Date
- 01 Oct 2026
- Ownership
- See footnote
- Footnotes
- F3
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
SEER
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 46,730
- Exercise price
- $2.00
- Footnotes
- F4
SEER
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 10,578
- Exercise price
- $2.00
- Footnotes
- F4
SEER
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 15,000
- Exercise price
- $2.00
- Footnotes
- F4
SEER
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 21,250
- Exercise price
- $2.00
- Footnotes
- F5
SEER
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 21,250
- Exercise price
- $1.77
- Footnotes
- F6
SEER
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 21,250
- Exercise price
- $2.33
- Footnotes
- F7
SEER
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 14,000
- Exercise price
- $1.79
- Footnotes
- F8
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 8 footnotes
Footnote F1
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.
Footnote F2
The shares are held in a custodial account for the reporting person's elder son.
Footnote F3
The shares are held in a custodial account for the reporting person's younger son.
Footnote F4
The shares underlying the option are fully vested are immediately exercisable.
Footnote F5
One-fourth of the shares underlying the option vested on February 7, 2024 and the remaining shares vest in 36 equal monthly installments thereafter.
Footnote F6
One-fourth of the shares underlying the option vested on February 6, 2025 and the remaining shares vest in 36 equal monthly installments thereafter.
Footnote F7
One-fourth of the shares underlying the option vested on February 6, 2026 and the remaining shares vest in 36 equal monthly installments thereafter.
Footnote F8
One-fourth of the shares underlying the option vest on February 3, 2027 and the remaining shares vest in 36 equal monthly installments thereafter.
SEC remarks
Exhibit 24.1 - Power of Attorney