CGEM

Cullinan Therapeutics, Inc.

Biological Products, (No Diagnostic Substances)NasdaqLarge accelerated filer<br>Smaller reporting company

Total Trades

87

Buys

5

Sells

73

Largest Trade

$1M+

Insiders

11

Institutional Funds

111

Inst. Value

$1M+

Activist Filings

32

Insider Trades

InsiderTitleTypeValueSharesPriceDate
Michaelson JenniferChief Scientific O…SELL$15K–$50K2K$14.14Feb 26, 2026
Michaelson JenniferChief Scientific O…SELL$50K–$100K5K$14.31Feb 25, 2026
AHMED NADIMPresident and CEOSELL$100K–$500K14K$14.47Feb 25, 2026
Jones Jeffrey AlanChief Medical Offi…SELL$50K–$100K5K$14.47Feb 25, 2026
SUMER JACQUELYN LChief Legal OfficerSELL$50K–$100K4K$14.47Feb 25, 2026
Jones Jeffrey AlanChief Medical Offi…SELL$50K–$100K5K$13.62Feb 23, 2026
Michaelson JenniferChief Scientific O…EXERCISE$15K–$50K8K$4.30Feb 23, 2026
Michaelson JenniferChief Scientific O…SELL$100K–$500K12K$14.08Feb 23, 2026
SUMER JACQUELYN LChief Legal OfficerSELL$50K–$100K4K$13.62Feb 23, 2026
AHMED NADIMPresident and CEOSELL$100K–$500K16K$13.62Feb 23, 2026
Fenton Mary KayCFOSELL$50K–$100K4K$13.62Feb 23, 2026
Michaelson JenniferChief Scientific O…SELL$1K–$15K416$12.03Feb 13, 2026
Michaelson JenniferChief Scientific O…SELL$15K–$50K4K$12.30Jan 23, 2026
AHMED NADIMPresident and CEOSELL$50K–$100K10K$10.01Dec 29, 2025
Michaelson JenniferChief Scientific O…SELL$1K–$15K1K$10.01Dec 22, 2025
SUMER JACQUELYN LChief Legal OfficerSELL$15K–$50K3K$9.67Dec 19, 2025
Jones Jeffrey AlanChief Medical Offi…SELL$15K–$50K5K$9.67Dec 19, 2025
Michaelson JenniferChief Scientific O…SELL$15K–$50K3K$9.67Dec 19, 2025
Michaelson JenniferChief Scientific O…SELL$15K–$50K3K$12.23Dec 16, 2025
Michaelson JenniferChief Scientific O…SELL$15K–$50K4K$12.30Nov 25, 2025
Lynx1 Capital Management LP10% OwnerBUY$1M+166K$8.40Oct 30, 2025
Lynx1 Capital Management LP10% OwnerBUY$1M+249K$8.46Oct 21, 2025
Jones Jeffrey AlanChief Medical Offi…SELL$15K–$50K5K$8.53Feb 27, 2025
AHMED NADIMPresident and CEOSELL$100K–$500K13K$8.53Feb 27, 2025
Michaelson JenniferChief Scientific O…SELL$15K–$50K4K$8.53Feb 27, 2025
SUMER JACQUELYN LChief Legal OfficerSELL$15K–$50K4K$8.53Feb 27, 2025
Michaelson JenniferChief Scientific O…SELL$50K–$100K4K$12.51Jan 7, 2025
AHMED NADIMPresident and CEOSELL$50K–$100K8K$11.87Dec 27, 2024
Michaelson JenniferChief Scientific O…SELL$50K–$100K5K$11.41Dec 20, 2024
Jones Jeffrey AlanChief Medical Offi…SELL$50K–$100K5K$11.41Dec 20, 2024
SUMER JACQUELYN LChief Legal OfficerSELL$15K–$50K3K$11.41Dec 20, 2024
Michaelson JenniferChief Scientific O…SELL$100K–$500K8K$15.64Nov 7, 2024
Savill CorrineChief Business Off…EXERCISE$100K–$500K40K$4.30Feb 3, 2024
Savill CorrineChief Business Off…SELL$500K+40K$16.18Feb 3, 2024
Savill CorrineChief Business Off…EXERCISE$100K–$500K40K$4.30Jan 31, 2024
Savill CorrineChief Business Off…SELL$500K+40K$14.09Jan 31, 2024
Savill CorrineChief Business Off…SELL$100K–$500K40K$12.31Jan 24, 2024
Savill CorrineChief Business Off…EXERCISE$100K–$500K36K$4.30Jan 24, 2024
AHMED NADIMPresident and CEOSELL$15K–$50K4K$9.24Dec 27, 2023
Jones Jeffrey AlanChief Medical Offi…SELL$15K–$50K2K$8.50Dec 22, 2023
SUMER JACQUELYN LChief Legal OfficerSELL$1K–$15K1K$8.50Dec 22, 2023
Trigilio JeffreyCFOSELL$15K–$50K2K$8.50Dec 22, 2023
Michaelson JenniferChief Scientific O…SELL$1K–$15K1K$8.50Dec 22, 2023
AHMED NADIMPresident and CEOSELL$1K–$15K759$11.40Jun 29, 2023
Jones Jeffrey AlanChief Medical Offi…SELL$1K–$15K387$12.94Jun 21, 2023
Michaelson JenniferChief Development …SELL$1K–$15K238$12.94Jun 21, 2023
Trigilio JeffreyCFOSELL$1K–$15K399$12.94Jun 21, 2023
SUMER JACQUELYN LChief Legal OfficerSELL$1K–$15K291$12.94Jun 21, 2023
Trigilio JeffreyCFOSELL$1K–$15K319$13.11Jun 14, 2023
Michaelson JenniferChief Development …SELL$1K–$15K176$13.11Jun 14, 2023
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Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Kynam Capital Management, LP

SC 13G · Mar 4, 2026

5.3%

3.1M shares

The Vanguard Group

SC 13G · Jan 30, 2026

5.6%

3.3M shares

Citadel Advisors LLC

SC 13G/A · Nov 14, 2025

3.1%

1.8M shares

LYNX1 CAPITAL MANAGEMENT LP

SC 13G/A · Nov 14, 2025

9.8%

5.8M shares

Deerfield Mgmt, L.P.

SC 13G/A · Nov 13, 2025

5.0%

2.9M shares

The Vanguard Group

SC 13G/A · Oct 30, 2025

5.0%

2.9M shares

Lynx1 Capital Management LP

SC 13G/A · Oct 10, 2025

14.5%

8.5M shares

Lynx1 Capital Management LP

SC 13G · Aug 14, 2025

7.5%

4.4M shares

Citadel Advisors LLC

SC 13G · Aug 6, 2025

4.3%

2.5M shares

Blue Owl Capital Holdings LP

SC 13G/A · Nov 14, 2024

3.5%

2.0M shares

Biotechnology Value Fund, L.P.

SC 13G/A · Nov 14, 2024

5.2%

3.0M shares

The Vanguard Group

SC 13G/A · Nov 12, 2024

5.2%

3.0M shares

BlackRock, Inc.

SC 13G · Nov 8, 2024

7.5%

4.3M shares

The Vanguard Group

SC 13G/A · Nov 4, 2024

5.2%

3.0M shares

Franklin Resources, Inc.

SC 13G/A · Oct 31, 2024

3.8%

2.2M shares

BlackRock, Inc.

SC 13G · Oct 22, 2024

7.5%

4.3M shares

BlackRock, Inc.

SC 13G/A · Jun 7, 2024

4.8%

2.7M shares

Deerfield Mgmt, L.P.

SC 13G · Apr 24, 2024

5.7%

3.3M shares

Blue Owl Capital Holdings LP

SC 13G · Feb 15, 2024

8.0%

3.4M shares

Globeways Holdings Ltd.

SC 13G/A · Feb 14, 2024

1.1%

469K shares

Biotechnology Value Fund, L.P.

SC 13G/A · Feb 14, 2024

6.5%

2.9M shares

The Vanguard Group - 23-1945930

SC 13G/A · Feb 13, 2024

4.1%

1.8M shares

BlackRock, Inc.

SC 13G · Jan 29, 2024

5.8%

2.5M shares

BlackRock, Inc.

SC 13G/A · Sep 7, 2023

4.8%

2.0M shares

Globeways Holdings Ltd.

SC 13G/A · Feb 15, 2023

3.4%

1.6M shares

Biotechnology Value Fund, L.P.

SC 13G/A · Feb 14, 2023

8.9%

4.1M shares

CHI Advisors LLC

SC 13G/A · Feb 13, 2023

7.3%

3.3M shares

BlackRock, Inc.

SC 13G · Feb 3, 2023

5.5%

2.5M shares

Biotechnology Value Fund, L.P.

SC 13G/A · Feb 14, 2022

6.4%

2.8M shares

2.6%

1.1M shares

CHI Advisors LLC

SC 13G · Feb 11, 2022

5.7%

2.5M shares

Globeways Holdings Ltd.

SC 13G · Feb 10, 2022

4.8%

2.1M shares

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