Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| Caribou Biosciences, Inc.CRBU · Entity 6445 | Director | February 20, 2026 | February 20, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
Caribou Biosciences, Inc.
Report date February 20, 2026 · Filed February 20, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Option to purchase Common StockSEC Table II · derivative / convertible security · Conversion / exercise price $1.80 · Expires 2036-02-19 | Direct | 45,000 |
Reported balance
After 2026-02-20 transaction · row 1
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 1 · 2026-02-20 · Grant · Acquired 45,000 · Balance 45,000 F1: One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2027, subject to the reporting person continuing to provide service to the Issuer through each such vesting date. |
Filing footnotes · ownership attribution and instrument terms
F1: One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2027, subject to the reporting person continuing to provide service to the Issuer through each such vesting date.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| February 20, 2026 Filed Feb 20, 2026 17:28 UTC | Caribou Biosciences, Inc. CRBU · Entity 6445 | GrantOption to purchase Common Stock · Derivative | 45,000 | $0.00 Strike: $1.80 | $0.00 |
DisclosureSEC source: 0001885914-26-000002 · wk-form4_1771626495.xml · derivative · entry 1 Zheng Ran · CIK 0001885914 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 45,000 Underlying: Common Stock · 45,000 shares Expires 2036-02-19 F1 · derivative.exercise_date: One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2027, subject to the reporting person continuing to provide service to the Issuer through each such vesting date. Read SEC document |
| February 20, 2025 Filed Feb 21, 2025 20:17 UTC | Caribou Biosciences, Inc. CRBU · Entity 6445 | GrantOption to purchase Common Stock · Derivative | 40,500 | $0.00 Strike: $1.41 | $0.00 |
DisclosureSEC source: 0001885914-25-000003 · wk-form4_1740187054.xml · derivative · entry 1 Zheng Ran · CIK 0001885914 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 40,500 Underlying: Common Stock · 40,500 shares Expires 2035-02-19 F1 · derivative.exercise_date: One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2026, subject to the reporting person continuing to provide service to the Issuer through each such vesting date. Read SEC document |
| February 20, 2024 Filed Feb 22, 2024 17:12 UTC | Caribou Biosciences, Inc. CRBU · Entity 6445 | GrantOption to purchase Common Stock · Derivative | 39,500 | $0.00 Strike: $6.81 | $0.00 |
DisclosureSEC source: 0001628280-24-006416 · wk-form4_1708639949.xml · derivative · entry 1 Zheng Ran · CIK 0001885914 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 39,500 Underlying: Common Stock · 39,500 shares Expires 2034-02-19 F1 · derivative.exercise_date: One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2025, subject to the reporting person continuing to provide service to the Issuer through each such vesting date. Read SEC document |
| February 21, 2023 Filed Feb 23, 2023 17:09 UTC | Caribou Biosciences, Inc. CRBU · Entity 6445 | GrantOption to purchase Common Stock · Derivative | 21,500 | $0.00 Strike: $6.12 | $0.00 |
DisclosureSEC source: 0001619856-23-000019 · wf-form4_167719010634615.xml · derivative · entry 1 Zheng Ran · CIK 0001885914 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 21,500 Underlying: Common Stock · 21,500 shares Expires 2033-02-20 F1 · derivative.exercise_date: One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 21, 2024, subject to the reporting person continuing to provide service to the Issuer through each such vesting date. Read SEC document |
| December 20, 2021 Filed Dec 21, 2021 17:43 UTC | Caribou Biosciences, Inc. CRBU · Entity 6445 | GrantOption to purchase Common Stock · Derivative | 13,750 | $0.00 Strike: $15.16 | $0.00 |
DisclosureSEC source: 0001209191-21-070829 · doc4.xml · derivative · entry 1 Zheng Ran · CIK 0001885914 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 13,750 Underlying: Common Stock · 13,750 shares Expires 2031-12-19 F1 · derivative.exercise_date: One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on December 20, 2022, subject to the reporting person continuing to provide service to the Issuer through each such vesting date. Read SEC document |
| October 01, 2021 Filed Oct 4, 2021 16:10 UTC | Caribou Biosciences, Inc. CRBU · Entity 6445 | GrantStock Option (right to buy) · Derivative | 44,000 | $0.00 Strike: $22.31 | $0.00 |
DisclosureSEC source: 0001209191-21-058926 · doc4.xml · derivative · entry 1 Zheng Ran · CIK 0001885914 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 44,000 Underlying: Common Stock · 44,000 shares Expires 2031-09-30 F1 · derivative.exercise_date: The option becomes exercisable in three equal annual installments beginning October 1, 2022. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.