4//SEC Filing
Kanner Steven 4
Accession 0001871131-25-000003
CIK 0001619856other
Filed
Feb 20, 7:00 PM ET
Accepted
Feb 21, 8:18 PM ET
Size
10.2 KB
Accession
0001871131-25-000003
Insider Transaction Report
Form 4
Kanner Steven
Chief Scientific Officer
Transactions
- Award
Option to purchase Common Stock
2025-02-20+170,000→ 170,000 totalExercise: $1.41Exp: 2035-02-19→ Common Stock (170,000 underlying) - Award
Common Stock
2025-02-20+37,500→ 435,120 total - Sale
Common Stock
2025-02-21$1.35/sh−3,564$4,811→ 431,556 total
Footnotes (5)
- [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.
- [F2]Includes 10,583 shares purchased pursuant to the Issuer's 2021 Employee Stock Purchase Plan on February 15, 2025.
- [F3]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.
- [F4]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.
- [F5]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.
Documents
Issuer
Caribou Biosciences, Inc.
CIK 0001619856
Entity typeother
Related Parties
1- filerCIK 0001871131
Filing Metadata
- Form type
- 4
- Filed
- Feb 20, 7:00 PM ET
- Accepted
- Feb 21, 8:18 PM ET
- Size
- 10.2 KB