CBIO

Crescent Biopharma, INC.

Insider trading activity for Crescent Biopharma, INC., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

+$12.1M

net buying

Bought(1 · 1 insiders): $12.4M
Sold(9 · 7 insiders): $285.5K

Past 6 months

+$10.9M

net buying

Bought(1 · 1 insiders): $12.4M
Sold(16 · 7 insiders): $1.5M

Past 12 months

+$29.1M

net buying

Bought(2 · 1 insiders): $30.6M
Sold(16 · 7 insiders): $1.5M

Transaction history

The 63 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 18	McNeill Jonathan	President and COO	SSELL◷	3,839	$16.71	$64.1K	-2.8%	Open the original filing on SEC.gov
Sep 18	Brumm Joshua T	Chief Executive Officer	SSELL◷	7,837	$16.71	$131K	-2.8%	Open the original filing on SEC.gov
Sep 16	McNeill Jonathan	President and COO	SSELL◷	731	$17.90	$13.1K	-0.5%	Open the original filing on SEC.gov
Sep 16	Brumm Joshua T	Chief Executive Officer	SSELL◷	1,610	$17.90	$28.8K	-0.6%	Open the original filing on SEC.gov
Sep 16	Bispham Barbara Harlin	See Remarks	SSELL◷	620	$17.90	$11.1K	-3.2%	Open the original filing on SEC.gov
Sep 16	Scalzo Richard William	Chief Financial Officer	SSELL◷	568	$17.90	$10.2K	-2.8%	Open the original filing on SEC.gov
Sep 16	Im Ellie Eunkyung	Chief Medical Officer	SSELL◷	623	$17.90	$11.2K	-2.8%	Open the original filing on SEC.gov
Sep 16	Pinkas Jan	Chief Scientific Officer	SSELL◷	658	$17.90	$11.8K	-3.0%	Open the original filing on SEC.gov
Sep 16	Lynch Ryan	See Remarks	SSELL◷	240	$17.90	$4.3K	-1.7%	Open the original filing on SEC.gov
Jul 16	Fairmount Funds…	Director, 10% Owner	PDBUY◆	525,897	$14.50	$7.6M	—	Open the original filing on SEC.gov
Jul 16	Fairmount Funds…	Director, 10% Owner	PBUY	853,450	$14.50	$12.4M	+31.1%	Open the original filing on SEC.gov
Jun 22	Lynch Ryan	See Remarks	SSELL◷	465	$17.99	$8.4K	-3.2%	Open the original filing on SEC.gov
Jun 22	Pinkas Jan	Chief Scientific Officer	SSELL◷	1,288	$17.99	$23.2K	-5.5%	Open the original filing on SEC.gov
Jun 22	Scalzo Richard William	Chief Financial Officer	SSELL◷	1,112	$17.99	$20K	-5.2%	Open the original filing on SEC.gov
Jun 22	Im Ellie Eunkyung	Chief Medical Officer	SSELL◷	1,219	$17.99	$21.9K	-5.2%	Open the original filing on SEC.gov
Jun 22	McNeill Jonathan	President and COO	SSELL◷	20,549	$17.99	$369.7K	-12.9%	Open the original filing on SEC.gov
Jun 22	Brumm Joshua T	Chief Executive Officer	SSELL◷	42,305	$17.99	$761.1K	-13.1%	Open the original filing on SEC.gov
Jun 22	Bispham Barbara Harlin	See Remarks	SSELL◷	1,218	$17.99	$21.9K	-5.9%	Open the original filing on SEC.gov
Jun 2	Violin Jonathan	Director	AGRANT◆	11,050	—	—	—	Open the original filing on SEC.gov
Jun 2	Lubner David Charles	Director	AGRANT◆	11,050	—	—	—	Open the original filing on SEC.gov
Jun 2	Moran Susan	Director	AGRANT◆	11,050	—	—	—	Open the original filing on SEC.gov
Jun 2	Fairmount Funds…	Director, 10% Owner	AGRANT◆	11,050	—	—	—	Open the original filing on SEC.gov
Jun 2	Balcom Alexandra	Director	AGRANT◆	11,050	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Pinkas Jan	Chief Scientific Officer	AGRANT◆	70,025	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Pinkas Jan	Chief Scientific Officer	AGRANT	5,000	—	—	+28.6%	Open the original filing on SEC.gov
Dec 15, 2025	Pinkas Jan	Chief Scientific Officer	AGRANT	17,507	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Doughty Christopher…	Chief Business Officer	AGRANT◆	58,855	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Doughty Christopher…	Chief Business Officer	AGRANT	8,000	—	—	+14.8%	Open the original filing on SEC.gov
Dec 15, 2025	Doughty Christopher…	Chief Business Officer	AGRANT	14,714	—	—	+37.3%	Open the original filing on SEC.gov
Dec 15, 2025	Scalzo Richard William	Chief Financial Officer	AGRANT◆	57,688	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Scalzo Richard William	Chief Financial Officer	AGRANT	5,000	—	—	+34.7%	Open the original filing on SEC.gov
Dec 15, 2025	Scalzo Richard William	Chief Financial Officer	AGRANT	14,422	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	McNeill Jonathan	President and COO	AGRANT◆	78,029	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	McNeill Jonathan	President and COO	AGRANT	6,000	—	—	+3.9%	Open the original filing on SEC.gov
Dec 15, 2025	McNeill Jonathan	President and COO	AGRANT	19,507	—	—	+14.5%	Open the original filing on SEC.gov
Dec 15, 2025	Im Ellie Eunkyung	Chief Medical Officer	AGRANT◆	65,190	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Im Ellie Eunkyung	Chief Medical Officer	AGRANT	5,000	—	—	+30.7%	Open the original filing on SEC.gov
Dec 15, 2025	Im Ellie Eunkyung	Chief Medical Officer	AGRANT	16,298	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Lynch Ryan	See Remarks	AGRANT◆	33,512	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Lynch Ryan	See Remarks	AGRANT	4,000	—	—	+47.7%	Open the original filing on SEC.gov
Dec 15, 2025	Lynch Ryan	See Remarks	AGRANT	8,378	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Brumm Joshua T	Chief Executive Officer	AGRANT◆	180,467	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Brumm Joshua T	Chief Executive Officer	AGRANT	10,000	—	—	+3.2%	Open the original filing on SEC.gov
Dec 15, 2025	Brumm Joshua T	Chief Executive Officer	AGRANT	45,117	—	—	+16.8%	Open the original filing on SEC.gov
Dec 15, 2025	Bispham Barbara Harlin	See Remarks	AGRANT◆	72,185	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Bispham Barbara Harlin	See Remarks	AGRANT	6,000	—	—	+48.3%	Open the original filing on SEC.gov
Dec 15, 2025	Bispham Barbara Harlin	See Remarks	AGRANT	12,422	—	—	—	Open the original filing on SEC.gov
Dec 8, 2025	McNeill Jonathan	President and COO	AGRANT◆	172,836	—	—	—	Open the original filing on SEC.gov
Dec 8, 2025	Brumm Joshua T	Chief Executive Officer	AGRANT◆	345,672	—	—	—	Open the original filing on SEC.gov
Dec 4, 2025	Fairmount Funds…	Director, 10% Owner	PDBUY◆	131,434	$13.41	$1.8M	—	Open the original filing on SEC.gov
Dec 4, 2025	Fairmount Funds…	Director, 10% Owner	PBUY	1.4M	$13.41	$18.2M	+98.0%	Open the original filing on SEC.gov
Jul 16, 2025	Pinkas Jan	Chief Scientific Officer	AGRANT◆	142,474	—	—	—	Open the original filing on SEC.gov
Jun 23, 2025	Moran Susan	Director	AGRANT◆	9,023	—	—	—	Open the original filing on SEC.gov
Jun 23, 2025	Violin Jonathan	Director	AGRANT◆	9,023	—	—	—	Open the original filing on SEC.gov
Jun 23, 2025	Lubner David Charles	Director	AGRANT◆	9,023	—	—	—	Open the original filing on SEC.gov
Jun 23, 2025	Fairmount Funds…	Director, 10% Owner	AGRANT◆	9,023	—	—	—	Open the original filing on SEC.gov
Jun 23, 2025	Balcom Alexandra	Director	AGRANT◆	9,023	—	—	—	Open the original filing on SEC.gov
Jun 13, 2025	Bvf Partners L P/il	10% Owner	JOTHER◆	25,944	—	—	—	Open the original filing on SEC.gov
Jun 13, 2025	Bvf Partners L P/il	10% Owner	JOTHER◆	257,515	—	—	—	Open the original filing on SEC.gov
Jun 13, 2025	Bvf Partners L P/il	10% Owner	JOTHER◆	304,098	—	—	—	Open the original filing on SEC.gov
Jun 13, 2025	Bvf Partners L P/il	10% Owner	JOTHER	56,079	—	—	+889.6%	Open the original filing on SEC.gov
Jun 13, 2025	Bvf Partners L P/il	10% Owner	JOTHER	556,617	—	—	+1,499%	Open the original filing on SEC.gov
Jun 13, 2025	Bvf Partners L P/il	10% Owner	JOTHER	657,308	—	—	+1,320%	Open the original filing on SEC.gov

SSELL◷$64.1K

McNeill Jonathan · President and COOSep 18

3,839 sh @ $16.71 · -2.8% own

SSELL◷$131K

Brumm Joshua T · Chief Executive…Sep 18

7,837 sh @ $16.71 · -2.8% own

SSELL◷$13.1K

McNeill Jonathan · President and COOSep 16

731 sh @ $17.90 · -0.5% own

SSELL◷$28.8K

Brumm Joshua T · Chief Executive…Sep 16

1,610 sh @ $17.90 · -0.6% own

SSELL◷$11.1K

Bispham Barbara Harlin · See RemarksSep 16

620 sh @ $17.90 · -3.2% own

SSELL◷$10.2K

Scalzo Richard William · Chief Financial…Sep 16

568 sh @ $17.90 · -2.8% own

SSELL◷$11.2K

Im Ellie Eunkyung · Chief Medical…Sep 16

623 sh @ $17.90 · -2.8% own

SSELL◷$11.8K

Pinkas Jan · Chief Scientific…Sep 16

658 sh @ $17.90 · -3.0% own

SSELL◷$4.3K

Lynch Ryan · See RemarksSep 16

240 sh @ $17.90 · -1.7% own

PDBUY◆$7.6M

Fairmount Funds… · Director, 10%…Jul 16

525,897 sh @ $14.50

PBUY$12.4M

Fairmount Funds… · Director, 10%…Jul 16

853,450 sh @ $14.50 · +31.1% own

SSELL◷$8.4K

Lynch Ryan · See RemarksJun 22

465 sh @ $17.99 · -3.2% own

SSELL◷$23.2K

Pinkas Jan · Chief Scientific…Jun 22

1,288 sh @ $17.99 · -5.5% own

SSELL◷$20K

Scalzo Richard William · Chief Financial…Jun 22

1,112 sh @ $17.99 · -5.2% own

SSELL◷$21.9K

Im Ellie Eunkyung · Chief Medical…Jun 22

1,219 sh @ $17.99 · -5.2% own

SSELL◷$369.7K

McNeill Jonathan · President and COOJun 22

20,549 sh @ $17.99 · -12.9% own

SSELL◷$761.1K

Brumm Joshua T · Chief Executive…Jun 22

42,305 sh @ $17.99 · -13.1% own

SSELL◷$21.9K

Bispham Barbara Harlin · See RemarksJun 22

1,218 sh @ $17.99 · -5.9% own

AGRANT◆—

Violin Jonathan · DirectorJun 2

11,050 sh

AGRANT◆—

Lubner David Charles · DirectorJun 2

11,050 sh

AGRANT◆—

Moran Susan · DirectorJun 2

11,050 sh

AGRANT◆—

Fairmount Funds… · Director, 10%…Jun 2

11,050 sh

AGRANT◆—

Balcom Alexandra · DirectorJun 2

11,050 sh

AGRANT◆—

Pinkas Jan · Chief Scientific…Dec 15, 2025

70,025 sh

AGRANT—

Pinkas Jan · Chief Scientific…Dec 15, 2025

5,000 sh · +28.6% own

AGRANT—

Pinkas Jan · Chief Scientific…Dec 15, 2025

17,507 sh

AGRANT◆—

Doughty Christopher… · Chief Business…Dec 15, 2025

58,855 sh

AGRANT—

Doughty Christopher… · Chief Business…Dec 15, 2025

8,000 sh · +14.8% own

AGRANT—

Doughty Christopher… · Chief Business…Dec 15, 2025

14,714 sh · +37.3% own

AGRANT◆—

Scalzo Richard William · Chief Financial…Dec 15, 2025

57,688 sh

AGRANT—

Scalzo Richard William · Chief Financial…Dec 15, 2025

5,000 sh · +34.7% own

AGRANT—

Scalzo Richard William · Chief Financial…Dec 15, 2025

14,422 sh

AGRANT◆—

McNeill Jonathan · President and COODec 15, 2025

78,029 sh

AGRANT—

McNeill Jonathan · President and COODec 15, 2025

6,000 sh · +3.9% own

AGRANT—

McNeill Jonathan · President and COODec 15, 2025

19,507 sh · +14.5% own

AGRANT◆—

Im Ellie Eunkyung · Chief Medical…Dec 15, 2025

65,190 sh

AGRANT—

Im Ellie Eunkyung · Chief Medical…Dec 15, 2025

5,000 sh · +30.7% own

AGRANT—

Im Ellie Eunkyung · Chief Medical…Dec 15, 2025

16,298 sh

AGRANT◆—

Lynch Ryan · See RemarksDec 15, 2025

33,512 sh

AGRANT—

Lynch Ryan · See RemarksDec 15, 2025

4,000 sh · +47.7% own

AGRANT—

Lynch Ryan · See RemarksDec 15, 2025

8,378 sh

AGRANT◆—

Brumm Joshua T · Chief Executive…Dec 15, 2025

180,467 sh

AGRANT—

Brumm Joshua T · Chief Executive…Dec 15, 2025

10,000 sh · +3.2% own

AGRANT—

Brumm Joshua T · Chief Executive…Dec 15, 2025

45,117 sh · +16.8% own

AGRANT◆—

Bispham Barbara Harlin · See RemarksDec 15, 2025

72,185 sh

AGRANT—

Bispham Barbara Harlin · See RemarksDec 15, 2025

6,000 sh · +48.3% own

AGRANT—

Bispham Barbara Harlin · See RemarksDec 15, 2025

12,422 sh

AGRANT◆—

McNeill Jonathan · President and COODec 8, 2025

172,836 sh

AGRANT◆—

Brumm Joshua T · Chief Executive…Dec 8, 2025

345,672 sh

PDBUY◆$1.8M

Fairmount Funds… · Director, 10%…Dec 4, 2025

131,434 sh @ $13.41

PBUY$18.2M

Fairmount Funds… · Director, 10%…Dec 4, 2025

1.4M sh @ $13.41 · +98.0% own

AGRANT◆—

Pinkas Jan · Chief Scientific…Jul 16, 2025

142,474 sh

AGRANT◆—

Moran Susan · DirectorJun 23, 2025

9,023 sh

AGRANT◆—

Violin Jonathan · DirectorJun 23, 2025

9,023 sh

AGRANT◆—

Lubner David Charles · DirectorJun 23, 2025

9,023 sh

AGRANT◆—

Fairmount Funds… · Director, 10%…Jun 23, 2025

9,023 sh

AGRANT◆—

Balcom Alexandra · DirectorJun 23, 2025

9,023 sh

JOTHER◆—

Bvf Partners L P/il · 10% OwnerJun 13, 2025

25,944 sh

JOTHER◆—

Bvf Partners L P/il · 10% OwnerJun 13, 2025

257,515 sh

JOTHER◆—

Bvf Partners L P/il · 10% OwnerJun 13, 2025

304,098 sh

JOTHER—

Bvf Partners L P/il · 10% OwnerJun 13, 2025

56,079 sh · +889.6% own

JOTHER—

Bvf Partners L P/il · 10% OwnerJun 13, 2025

556,617 sh · +1,499% own

JOTHER—

Bvf Partners L P/il · 10% OwnerJun 13, 2025

657,308 sh · +1,320% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 32 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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