Ryan Fischesser - Jan 11, 2022 Form 4 Insider Report for Caribou Biosciences, Inc. (CRBU)

Role
VP of Finance and Controller
Signature
/s/ Barbara G. McClung, as attorney-in-fact
Stock symbol
CRBU
Transactions as of
Jan 11, 2022
Transactions value $
$29,553
Form type
4
Date filed
1/12/2022, 03:35 PM
Previous filing
Dec 21, 2021
Next filing
Mar 17, 2022

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CRBU Common Stock Purchase $1.53K +569 +0.56% $2.69 102K Jan 11, 2022 Direct F1
transaction CRBU Common Stock Purchase $28K +6.82K +6.67% $4.11 109K Jan 11, 2022 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CRBU Option to purchase Common Stock Exercise of in-the-money or at-the-money derivative security $0 -569 -7.71% $0.00 6.82K Jan 11, 2022 Common Stock 569 $2.69 Direct F2, F3
transaction CRBU Option to purchase Common Stock Exercise of in-the-money or at-the-money derivative security $0 -6.82K -25% $0.00 20.5K Jan 11, 2022 Common Stock 6.82K $4.11 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 These shares were acquired pursuant to the exercise of a stock option, as reported in Table II below.
F2 The exercise price for this stock option was incorrectly reported as $2.68 per share on the reporting person's Form 3 filed on July 23, 2021.
F3 The shares subject to this option have vested or will vest in equal monthly installments until the option is fully vested on January 1, 2023, subject to the reporting person's continued service to the Issuer through the applicable vesting dates.
F4 1/4th of the shares subject to this option vested on January 1, 2022 and an additional 1/48th of the aggregate number of shares subject to the option have vested or will vest on the corresponding day of each month thereafter, subject to the reporting person's continued services to the Issuer through the applicable vesting dates.