Key facts
- This page summarizes Stephen W. Webster's Form 4 filing for Gritstone bio, Inc..
- 3 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 08 Apr 2025, 20:54.
Stephen W. Webster - 04 Apr 2025 Form 4 Insider Report for Gritstone bio, Inc.
- Reporting relationship
- Director
- Issuer ticker
- N/A
- Reported as of
- 04 Apr 2025
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 08 Apr 2025, 20:54:21 UTC
- Prior SEC filing
- 27 Jun 2024
- Next SEC filing
- 16 Jun 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Vassiliki Economides, Attorney-in-Fact for Stephen W. Webster
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Stephen W. Webster filed Form 4 for Gritstone bio, Inc. on 08 Apr 2025.
Change
- Previous filing in this sequence was filed on 27 Jun 2024.
- 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
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
GRTS
transaction
Common Stock
Other
- Transaction value
- $0
- Shares
- -25,000
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 04 Apr 2025
- Ownership
- Direct
- Footnotes
- F1
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
GRTS
transaction
Derivative
Stock Option (Right to Buy)
Other
- Transaction value
- $0
- Shares
- -103,600
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 04 Apr 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 103,600
- Exercise price
- $0.8100
- Footnotes
- F1, F2
GRTS
transaction
Derivative
Stock Option (Right to Buy)
Other
- Transaction value
- $0
- Shares
- -7,379
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 04 Apr 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 7,379
- Exercise price
- $0.7600
- Footnotes
- F1, F3
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Section 16 status
Stephen W. Webster is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.
Explanation of responses 3 footnotes
Footnote F1
Pursuant to the Issuer's Second Modified Plan of Reorganization pursuant to Chapter 11 of the Bankruptcy Code, which was confirmed by the United States Bankruptcy Court for the District of Delaware on April 3, 2025 and became effective on April 4, 2025, each share of the Issuer's common stock and options to purchase the Issuer's common stock outstanding prior to the Issuer's emergence from bankruptcy were cancelled for no value.
Footnote F2
The option vests as to 1/36th of the total grant monthly beginning May 26, 2024 until such time as the option is 100% vested, subject to the continued service of the Reporting Person on each vesting date.
Footnote F3
The option will vest and become exercisable on the earlier of (i) the first anniversary of the date of grant or (ii) the date of the next annual stockholder's meeting to the extent unvested as of such date, subject to continued service through the applicable vesting date.