42 transactions on file (0 open-market purchases and 17 open-market sales).
17 open-market sales by CELC insiders, between Nov 20, 2025 and Jul 14, 2026.
Discretionary.
Planned (10b5-1).
Not stated.
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-08-14 | Laing Lance G. Chief Science Officer · Director Grant / award | Grant / award | +20,000 | $0.00 | +0 | 1,271,000 |
| 2026-08-14 | Sullivan Brian F. Chief Executive Officer · Director Grant / award | Grant / award | +80,000 | $0.00 | +0 | 1,450,199 |
| 2026-08-14 | Hahne Vicky Chief Financial Officer Grant / award | Grant / award | +16,000 | $0.00 | +0 | 37,808 |
| 2026-07-14 | BAKER BROS. ADVISORS LP Open-market sale Discretionary | Open-market sale Discretionary | −261,368 | $102.50 | −26.79M | 442,940 |
| 2026-07-14 | BAKER BROS. ADVISORS LP Open-market sale Discretionary | Open-market sale Discretionary | −2,838,632 | $102.50 | −290.96M | 4,372,852 |
37 more transactions are on Measure
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| Insider | Role | On Sep 23, 2025 | Now | Change | Sold | Shape |
|---|---|---|---|---|---|---|
| Dalvey DavidDirector | Director | 125,000 | 65,000 | −48.00% | $7.42M$7.42M on a plan | |
| Buller Richard EDirector | Director | 11,160 | 6,760 | −39.43% | $2.4M$802K no plan · $1.59M on a plan | |
| BAKER BROS. ADVISORS LP- | - | 704,308 | 4,372,852 | +520.87% | $318M$318M no plan |
What each insider held after every open-market trade, over the last twelve months.
The assistant answers from what CELC has actually filed: 10 annual reports filed with the SEC, 40 Form 4 filings from the last year and 3 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.
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Source
From SEC Form 4 filings, filed within two business days of a transaction.
Past transactions say nothing about future ones, and none of this is investment advice.
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Watch CELC and every open-market Form 4 worth a row (a purchase, a senior officer's sale, anything at a million dollars) lands in the bell and a daily email, with the 10b5-1 word on it when the filing says so. Free.
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Every Form 4 CELC insiders file, not just the latest handful, with vesting and tax withholding struck out so what's left reads as a decision.
Every filingMeasure
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Each stake priced at the quarter it was filed, and diffed against the quarter before: how big a bet it is for them, and by how much it moved.
Every position, sizedMeasure
Ask what a run of filings adds up to
Whether this is one decision or a pattern, and how it compares with CELC's own history of insider activity.
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The table above says who traded. This says what CELC did over the following 30, 90 and 180 days after each open-market purchase and sale, from this company’s own record rather than a study about companies in general, and with the number of transactions shown beside every average.
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