Form 4 for CRBU Caribou Biosciences, Inc.
Accepted 2025-02-21 00:00:00 ET · period of report 2025-02-20 · accession 0001231321-25-000003 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-02-21 | 2025-02-21 | CRBU | MCCLUNG BARBARA G | CLO | S - Sale | $1.35 | -3,564 | 443.5K | -0.8% | -$4,811 |
| D | 2025-02-21 | 2025-02-20 | CRBU | MCCLUNG BARBARA G | CLO | A - Grant | $0.00 | +37.5K | 447.1K | +9% | $0 |
| D | 2025-02-21 | 2025-02-20 | CRBU | MCCLUNG BARBARA G | CLO | A - Grant | $0.00 | +170.0K | 170.0K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-02-21 | S | D | 3,564 | $1.35 | 443,502 | D | — | — | (F2) Reflects the number of shares of common stock that were sold in a "sell to cover" transaction for the sole purpose of satisfying tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person and does not represent a discretionary trade by the reporting person. This transaction was made pursuant to a Rule 10b5-1 trading plan in the form of a durable sell-to-cover instruction adopted prior to the 2023 amendments to Rule 10b5-1. The trading plan provides for the automatic sale of shares of common stock necessary to satisfy the reporting person's tax withholding obligations incurred in connection with the vesting of RSUs. (F3) This transaction was executed in multiple trades on 2/21/2025 at prices ranging from $1.32 to $1.35. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price within the specified range. |
| 2 | Common | Common Stock | 2025-02-20 | A | A | 37,500 | $0.00 | 447,066 | D | — | — | (F1) This reflects restricted stock units ("RSUs") that vest in four equal annual installments beginning on February 20, 2026, subject to the reporting person's continued services to the Issuer through the applicable vesting dates. The RSUs will be settled in stock within 30 days after each vesting date. |
| 3 | Derivative | Option to purchase Common Stock | 2025-02-20 | A | A | 170,000 | $0.00 | 170,000 | D | $1.41 · — to 2035-02-19 | 170,000 Common Stock | (F4) 25% of the options will vest upon the one-year anniversary of the grant date, February 20, 2026, and 1/48th will vest monthly thereafter over the 36-month period following the one-year cliff, subject to the reporting person's continued service to the Issuer through the applicable vesting dates. |