Caribou Biosciences, Inc. (CRBU) insider trading: who bought and sold · Investailor

CRBU insider activity

11 transactions on file (0 open-market purchases and 5 open-market sales).

Scheduled or decided

5 open-market sales by CRBU insiders, between Feb 24, 2026 and Feb 25, 2026.

A sale made under a trading plan agreed months earlier is not the same event as one decided that week, and the filing itself says which.

Discretionary: $45.39K; 4 filings · 3 people
Planned (10b5-1): $2.09K; 1 filing · 1 person
Not stated: None; no sales on file

Discretionary. The box was on the form and was not ticked.

The sale was made at the prevailing price without a pre-arranged plan behind it.

Planned (10b5-1). The filer ticked the Form 4's 10b5-1 box.

The sale ran under a trading plan adopted before the trade, so it is a schedule executing rather than a view taken this week.

Not stated. The filing does not say.

Either it predates the April 2023 checkbox, or nothing has re-read it since. This tab will not guess which of the other two it was.

Recent transactions11 filed

Date	Insider	Type	Shares	Price	Value	Owned after
2026-02-25	Kelly Timothy P Chief Technology Officer Open-market saleDiscretionary	Open-market sale Discretionary	−6,228	$1.93	−12.02K	73,125
2026-02-24	MCCLUNG BARBARA G Chief Legal Officer Open-market saleDiscretionary	Open-market sale Discretionary	−6,938	$1.96	−13.6K	481,564
2026-02-24	Kelly Timothy P Chief Technology Officer Open-market saleDiscretionary	Open-market sale Discretionary	−3,147	$1.96	−6.17K	79,353
2026-02-24	Khan Ruhi Ahmad Chief Business Officer Open-market saleDiscretionary	Open-market sale Discretionary	−6,938	$1.96	−13.6K	104,998
2026-02-24	Albertson Tina M. Chief Medical Officer Open-market salePlanned (10b5-1)	Open-market sale Planned (10b5-1)	−1,066	$1.96	−2.09K	68,523

6 more transactions are on Measure

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Each insider's stake4 people

Insider	Role	On Sep 12, 2025	Now	Change	Sold
Kelly Timothy PChief Technology Officer	Chief Technology Officer	82,500	73,125	−11.36%	$18.19K$18.19K no plan
Khan Ruhi AhmadChief Business Officer	Chief Business Officer	111,936	104,998	−6.20%	$13.6K$13.6K no plan
Albertson Tina M.Chief Medical Officer	Chief Medical Officer	69,589	68,523	−1.53%	$2.09K$2.09K on a plan

1 more insider, included withMeasure

What each insider held after every open-market trade, over the last twelve months.

The figure is each person’s holding as they reported it. It counts one class of stock and excludes grants, option exercises and shares withheld for tax, so a stake can fall here while somebody’s total holding does not. Since April 2023 a Form 4 states whether a trade ran under a pre-arranged 10b5-1 plan; an older one does not, and those dollars read “not stated” rather than being counted either way.

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The assistant answers from what CRBU has actually filed: 7 annual reports filed with the SEC, 11 Form 4 filings from the last year and 2 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.

Pressing one answers it here, from CRBU's filings and figures. One a day without an account; a free account has its own, and no card.

See every Form 4 CRBU insiders have filed, not the latest few.

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What an account lets you do with CRBU's filings

Source

From SEC Form 4 filings, filed within two business days of a transaction.

They are filed by officers, directors and 10%-owners. “Indirect” holdings (a trust, an LLC, a family member) are included and not distinguished from direct ones in this table.

Past transactions say nothing about future ones, and none of this is investment advice.

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What an account lets you do with CRBU's filings

After each open-market trade