Cullinan Therapeutics, Inc. (CGEM) Insider Trading

Over the last 3 months, CGEM insiders made 0 open-market buys and 3 sales, a net sale of -$242K (SEC Form 4). Over the last 6 months, 136 institutions increased and 84 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
3
Net (3m)
-$242.4K
Insider trades by month Buys Sells
Nov
Dec
Jan
Feb
Mar
May
Context3-month price -7.5%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
May 6, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell200$15.58
May 6, 2026Michaelson Jenniferofficer: Chief Scientific OfficerOption4,000$4.30
May 6, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell7,800$14.60
Mar 9, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell8,000$15.68
Mar 9, 2026Michaelson Jenniferofficer: Chief Scientific OfficerOption4,000$4.30
Feb 26, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell1,780$14.14
Feb 25, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell1,752$13.99
Feb 25, 2026AHMED NADIMdirector, officer: President and CEOSell13,515$14.47
Feb 25, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell3,601$14.47
Feb 25, 2026Jones Jeffrey Alanofficer: Chief Medical OfficerSell4,582$14.47
Feb 25, 2026SUMER JACQUELYN Lofficer: Chief Legal OfficerSell3,601$14.47
Feb 23, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell3,742$13.62
Feb 23, 2026Fenton Mary Kayofficer: Chief Financial OfficerSell4,398$13.62
Feb 23, 2026AHMED NADIMdirector, officer: President and CEOSell16,381$13.62
Feb 23, 2026SUMER JACQUELYN Lofficer: Chief Legal OfficerSell3,742$13.62
Feb 23, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell8,000$14.30
Feb 23, 2026Michaelson Jenniferofficer: Chief Scientific OfficerOption8,000$4.30
Feb 23, 2026Jones Jeffrey Alanofficer: Chief Medical OfficerSell4,982$13.62
Feb 19, 2026SUMER JACQUELYN Lofficer: Chief Legal OfficerGrant230,000$12.44
Feb 19, 2026AHMED NADIMdirector, officer: President and CEOGrant828,000$12.44
Feb 19, 2026Michaelson Jenniferofficer: Chief Scientific OfficerGrant57,500
Feb 19, 2026Savill Corrineofficer: Chief Business OfficerGrant175,000$12.44
Feb 19, 2026Fenton Mary Kayofficer: Chief Financial OfficerGrant137,500$12.44
Feb 19, 2026Fenton Mary Kayofficer: Chief Financial OfficerGrant68,750
Feb 19, 2026Jones Jeffrey Alanofficer: Chief Medical OfficerGrant300,000$12.44
Feb 19, 2026Michaelson Jenniferofficer: Chief Scientific OfficerGrant115,000$12.44
Feb 13, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell416$12.03
Jan 23, 2026Michaelson Jenniferofficer: Chief Scientific OfficerSell4,000$12.30
Jan 5, 2026Fenton Mary Kayofficer: Chief Financial OfficerGrant27$6.49
Dec 29, 2025AHMED NADIMdirector, officer: President and CEOSell9,922$10.01

Source: CGEM SEC Form 4 filings, latest May 6, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their CGEM positions over the last 6 months (SEC Form 13F).

Increased
136
New positions
61
Reduced
84
Sold out
35
Largest moves
InstitutionActionSharesFiled
LYNX1 CAPITAL MANAGEMENT LPIncreased9.0MFeb 17, 2026
LYNX1 CAPITAL MANAGEMENT LPUnchanged9.0MMay 4, 2026
BIOIMPACT CAPITAL LLCUnchanged7.6MMay 15, 2026
BIOIMPACT CAPITAL LLCUnchanged7.6MFeb 17, 2026
BVF INC/ILUnchanged5.8MFeb 17, 2026
BVF INC/ILUnchanged5.8MMay 15, 2026
BLACKROCK, INC.Increased4.4MMay 13, 2026
BLACKROCK, INC.Increased4.4MFeb 12, 2026
VANGUARD GROUP INCIncreased3.3MJan 29, 2026
KYNAM CAPITAL MANAGEMENT, LPIncreased3.1MFeb 17, 2026
KYNAM CAPITAL MANAGEMENT, LPUnchanged3.1MMay 15, 2026
STATE STREET CORPIncreased2.5MMay 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position2.5MMay 15, 2026
BLUE OWL CAPITAL HOLDINGS LPReduced2.4MFeb 20, 2026
STATE STREET CORPIncreased2.2MFeb 13, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.