Crescent Biopharma, Inc. (CBIO) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, the three largest insider holders of CBIO are Funds Management Llc Fairmount (Director, 2.75Mn shares), Scott D Sandell (TenPercentOwner, 2.24Mn shares), Edwin Rock (Chief Medical Officer, 680.40K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Funds Management Llc Fairmount 0 2,747,866 08 Dec, 2025
Scott D Sandell 0 2,237,196 27 Jan, 2023
Edwin Rock Chief Medical Officer 680,403 0 24 Jun, 2024
Rachel K. King 511,860 0 02 Jan, 2024
John L. Magnani Svp Of Research, Cso 366,078 0 14 Nov, 2022
Joshua T Brumm Chief Executive Officer 323,517 0 17 Dec, 2025
Jonathan Mcneill President And Coo 159,707 0 17 Dec, 2025
Bruce S Johnson Svp Chief Commercial Officer 138,980 0 09 May, 2023
Daniel M Junius 98,459 0 01 Apr, 2024
Brian M. Hahn Svp Finance, Cfo 70,643 0 20 Jun, 2024
Christopher Grant Doughty Chief Business Officer 62,194 0 17 Dec, 2025
Patricia S Andrews 58,608 0 02 Jan, 2024
Scott Koenig 36,750 0 02 Jun, 2023
Armand Girard Svp, Chief Business Officer 29,161 0 14 Nov, 2022
Harout Semerjian Chief Executive Officer 25,000 0 14 Nov, 2022
Mark Alan Goldberg 24,828 0 01 Apr, 2024
Timothy R Pearson 24,650 0 14 Nov, 2022
Jan Pinkas Chief Scientific Officer 22,507 0 17 Dec, 2025
Ellie Eunkyung Im Chief Medical Officer 21,298 0 17 Dec, 2025
Richard William Scalzo Chief Financial Officer 19,422 0 17 Dec, 2025
Barbara Harlin Bispham See Remarks 18,422 0 17 Dec, 2025
Ryan Lynch See Remarks 12,378 0 17 Dec, 2025
Scott Thomas Jackson 5,250 0 27 May, 2021

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
15 Dec, 2025 Richard William Scalzo Ordinary Shares A 14,422 - 14,422 D A
15 Dec, 2025 Christopher Grant Doughty Ordinary Shares A 14,714 - 54,194 D A
15 Dec, 2025 Ellie Eunkyung Im Ordinary Shares A 16,298 - 16,298 D A
15 Dec, 2025 Jonathan Mcneill Ordinary Shares A 19,507 - 153,707 D A
15 Dec, 2025 Jan Pinkas Ordinary Shares A 17,507 - 17,507 D A
15 Dec, 2025 Barbara Harlin Bispham Ordinary Shares A 12,422 - 12,422 D A
15 Dec, 2025 Joshua T Brumm Ordinary Shares A 45,117 - 313,517 D A
15 Dec, 2025 Ryan Lynch Ordinary Shares A 8,378 - 8,378 D A
15 Dec, 2025 Ellie Eunkyung Im Ordinary Shares A 5,000 - 21,298 D A
15 Dec, 2025 Barbara Harlin Bispham Ordinary Shares A 6,000 - 18,422 D A
15 Dec, 2025 Richard William Scalzo Ordinary Shares A 5,000 - 19,422 D A
15 Dec, 2025 Joshua T Brumm Ordinary Shares A 10,000 - 323,517 D A
15 Dec, 2025 Christopher Grant Doughty Ordinary Shares A 8,000 - 62,194 D A
15 Dec, 2025 Jonathan Mcneill Ordinary Shares A 6,000 - 159,707 D A
15 Dec, 2025 Ryan Lynch Ordinary Shares A 4,000 - 12,378 D A
15 Dec, 2025 Jan Pinkas Ordinary Shares A 5,000 - 22,507 D A
15 Dec, 2025 Ellie Eunkyung Im Stock Option (Right to Buy) A 65,190 $0.00 65,190 D A
15 Dec, 2025 Jan Pinkas Stock Option (Right to Buy) A 70,025 $0.00 70,025 D A
15 Dec, 2025 Christopher Grant Doughty Stock Option (Right to Buy) A 58,855 $0.00 58,855 D A
15 Dec, 2025 Joshua T Brumm Stock Option (Right to Buy) A 180,467 $0.00 180,467 D A