NASDAQ:CGEM

Cullinan Oncology Stock Insider Trading

Healthcare > Biotechnology

Buy CGEM

*Your capital is at risk

$16.50

-1.02 (-5.82%)

At Close: Jul 31, 2026

Cullinan Oncology Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 75.26. In total, the insiders bought 6.94M and sold 177.78K CGEM shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	75.26
● Buy	6.94M shares
● Sell	177.78K shares
66% Buy Activity Negligible or No Correlation
Sell Signal Low Confidence Jul 06, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory positive Insider Power Score of 75.26. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Nov 24, 2025 Sell	Common Stock S-Sale	Michaelson Jennifer Chief Scientific Officer	Officer	4 000 Value: $49.2K
Oct 28, 2025 Buy	Common stock, $0.0001 par value per share P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	165 667 Value: $1.39M
Oct 17, 2025 Buy	Common Stock P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	32 217 Value: $252.6K
Oct 16, 2025 Buy	Common Stock P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	150 000 Value: $1.33M
Oct 15, 2025 Buy	Common Stock P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	51 500 Value: $409.0K
Oct 14, 2025 Buy	Common stock, $0.0001 par value per share ("Common Stock") P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	15 032 Value: $114.0K
Oct 10, 2025 Buy	Common Stock P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	277 298 Value: $2.04M
Oct 10, 2025 Buy	Common Stock P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	277 298 Value: $2.04M
Oct 09, 2025 Buy	Common Stock P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	626 043 Value: $4.19M
Oct 09, 2025 Buy	Common Stock P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	626 043 Value: $4.19M
Oct 08, 2025 Buy	Common stock, $0.0001 par value per share	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	0 Value: $0
Oct 08, 2025 Buy	Common stock, $0.0001 par value per share ("Common Stock") P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	556 300 Value: $3.59M
Oct 08, 2025 Buy	Common stock, $0.0001 par value per share	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	0 Value: $0
Oct 08, 2025 Buy	Common stock, $0.0001 par value per share ("Common Stock") P-Purchase	Lynx1 Capital Management Lp 10 Percent Owner	10% Owner	556 300 Value: $3.59M
Aug 07, 2025 Buy	Stock Option (Right to Buy) A-Award	Doyle Mittie Director	Director	79 456 Value: $558.6K
Aug 07, 2025 Buy	Stock Option (Right to Buy) A-Award	Allen Andrew R Director	Director	79 456 Value: $558.6K
Aug 07, 2025 Buy	Common Stock J-Other	Allen Andrew R Insider	Other	0 Value: $0
Aug 07, 2025 Buy	Common Stock J-Other	Doyle Mittie Insider	Other	0 Value: $0
Aug 07, 2025 Buy	Common Stock J-Other	Doyle Mittie Insider	Other	0 Value: $0
Aug 07, 2025 Buy	Common Stock J-Other	Allen Andrew R Insider	Other	0 Value: $0
Aug 07, 2025 Buy	Stock Option (Right to Buy) A-Award	Allen Andrew R Director	Director	79 456 Value: $558.6K
Aug 07, 2025 Buy	Stock Option (Right to Buy) A-Award	Doyle Mittie Director	Director	79 456 Value: $558.6K
Jun 12, 2025 Buy	Stock Option (Right to Buy) A-Award	Ryan David P. Director	Director	38 513 Value: $344.7K
Jun 12, 2025 Buy	Stock Option (Right to Buy) A-Award	Rosenberg Anthony Director	Director	38 513 Value: $344.7K
Jun 12, 2025 Buy	Stock Option (Right to Buy) A-Award	Webster Stephen W Director	Director	38 513 Value: $344.7K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks