Form 4 for CRBU Caribou Biosciences, Inc.

Accepted 2022-01-12 00:00:00 ET · period of report 2022-01-11 · accession 0001209191-22-003062 · 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
DM	2022-01-12	2022-01-11	CRBU	Fischesser Ryan	VP of Fin, Ctrl	P - Purchase	$4.00	+7,387	102.3K	+8%	+$29.6K
DM	2022-01-12	2022-01-11	CRBU	Fischesser Ryan	VP of Fin, Ctrl	X - OptEx	$0.00	-7,387	20.5K	-27%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2022-01-11	P	A	6,818	$4.11	109,082	D	—	—
2	Common	Common Stock	2022-01-11	P	A	569	$2.69	102,264	D	—	—
3	Derivative	Option to purchase Common Stock	2022-01-11	X	D	569	$0.00	6,815	D	$2.69 · — to 2029-03-18	569 Common Stock	(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.
4	Derivative	Option to purchase Common Stock	2022-01-11	X	D	6,818	$0.00	20,452	D	$4.11 · — to 2031-03-29	6,818 Common Stock	(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.