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Crescent Biopharma, Inc. (CBIO)

Crescent Biopharma, Inc. (CBIO) Insider Trading

Directors, officers and holders of more than 10% of CBIO report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 63 transactions on file: 3 with code P, 16 with code S and 31 with other codes.

DateInsiderCodeShares
Sep 18, 2026Brumm Joshua TS Sale7,837
Sep 18, 2026McNeill JonathanS Sale3,839
Sep 16, 2026Brumm Joshua TS Sale1,610
Sep 16, 2026McNeill JonathanS Sale731
Sep 16, 2026Lynch RyanS Sale240
Sep 16, 2026Pinkas JanS Sale658
Sep 16, 2026Im Ellie EunkyungS Sale623
Sep 16, 2026Scalzo Richard WilliamS Sale568
Sep 16, 2026Bispham Barbara HarlinS Sale620
Jul 16, 2026Fairmount Funds Management LLCP Purchase853,450
Jul 16, 2026Fairmount Funds Management LLCP Purchase525,897
Jun 22, 2026McNeill JonathanS Sale20,549
Jun 22, 2026Lynch RyanS Sale465
Jun 22, 2026Pinkas JanS Sale1,288
Jun 22, 2026Scalzo Richard WilliamS Sale1,112
Jun 22, 2026Bispham Barbara HarlinS Sale1,218
Jun 22, 2026Im Ellie EunkyungS Sale1,219
Jun 22, 2026Brumm Joshua TS Sale42,305
Jun 2, 2026Moran SusanA Award11,050
Jun 2, 2026Balcom AlexandraA Award11,050
Jun 2, 2026Lubner David CharlesA Award11,050
Jun 2, 2026Fairmount Funds Management LLCA Award11,050
Jun 2, 2026Violin JonathanA Award11,050
Dec 15, 2025Im Ellie EunkyungA Award65,190
Dec 15, 2025Pinkas JanA Award5,000
Dec 15, 2025Scalzo Richard WilliamA Award14,422
Dec 15, 2025Scalzo Richard WilliamA Award5,000
Dec 15, 2025McNeill JonathanA Award19,507
Dec 15, 2025McNeill JonathanA Award6,000
Dec 15, 2025Lynch RyanA Award8,378
Dec 15, 2025Lynch RyanA Award4,000
Dec 15, 2025Bispham Barbara HarlinA Award12,422
Dec 15, 2025Bispham Barbara HarlinA Award6,000
Dec 15, 2025Doughty Christopher GrantA Award14,714
Dec 15, 2025Doughty Christopher GrantA Award8,000
Dec 15, 2025Brumm Joshua TA Award45,117
Dec 15, 2025Brumm Joshua TA Award10,000
Dec 15, 2025Im Ellie EunkyungA Award16,298
Dec 15, 2025Im Ellie EunkyungA Award5,000
Dec 15, 2025Pinkas JanA Award70,025
Dec 15, 2025Scalzo Richard WilliamA Award57,688
Dec 15, 2025McNeill JonathanA Award78,029
Dec 15, 2025Lynch RyanA Award33,512
Dec 15, 2025Bispham Barbara HarlinA Award72,185
Dec 15, 2025Doughty Christopher GrantA Award58,855
Dec 15, 2025Brumm Joshua TA Award180,467
Dec 15, 2025Pinkas JanA Award17,507
Dec 8, 2025McNeill JonathanA Award172,836
Dec 8, 2025Brumm Joshua TA Award345,672
Dec 4, 2025Fairmount Funds Management LLCP Purchase1,360,000

The full Form 4 history is on the CBIO company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.