Generation Bio Stock Insider Trading

Healthcare > Biotechnology

Buy GBIO

*Your capital is at risk

$5.34

+0 (+0%)

At Close: May 05, 2026

Generation Bio Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -99.86. In total, the insiders bought 6.98K and sold 692.96K GBIO 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)	-99.86
● Buy	6.98K shares
● Sell	692.96K shares
6% Buy Activity Weak Negative Correlation
Sell Signal High Confidence Feb 09, 2026 Analysis Breakdown: Strongly supported by a very low Insider Power Score of -99.86. Confidence increased due to high data reliability score of 100. Supported by overwhelming sell-side pressure (6% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Mcdonough Geoff Director	Director	19 903 Value: $1.03M
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Mcdonough Geoff Director	Director	25 099 Value: $7.59M
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Mcdonough Geoff Director	Director	37 499 Value: $2.43M
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Mcdonough Geoff Director	Director	50 624 Value: $941.6K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Mcdonough Geoff Director	Director	90 168 Value: $834.5K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Mcdonough Geoff Director	Director	16 874 Value: $793.9K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Mcdonough Geoff Director	Director	24 046 Value: $334.2K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Jonas Jeffrey M Director	Director	3 000 Value: $11.6K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Jonas Jeffrey M Director	Director	4 246 Value: $195.0K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Jonas Jeffrey M Director	Director	5 200 Value: $988.0K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Jonas Jeffrey M Director	Director	1 500 Value: $398.9K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Jonas Jeffrey M Director	Director	1 920 Value: $118.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Jonas Jeffrey M Director	Director	2 500 Value: $120.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Jonas Jeffrey M Director	Director	6 000 Value: $199.2K
Feb 09, 2026 Sell	Common Stock U-Tender	Howze Yalonda Interim CEO And President	CEO / President	3 759 Value: $0
Feb 02, 2026 Buy	Common Stock M-Exempt	Howze Yalonda Interim CEO & President	CEO / President	1 673 Value: $9K
Feb 02, 2026 Buy	Common Stock M-Exempt	Mcdonough Geoff Director	Director	1 582 Value: $9K
Feb 02, 2026 Buy	Common Stock M-Exempt	Conway Kevin John Chief Financial Officer	C-Suite Officer	235 Value: $1K
Feb 02, 2026 Sell	Common Stock F-InKind	Conway Kevin John Chief Financial Officer	C-Suite Officer	72 Value: $406
Feb 02, 2026 Buy	Restricted Stock Units M-Exempt	Conway Kevin John Chief Financial Officer	C-Suite Officer	235 Value: $1K
Feb 02, 2026 Sell	Common Stock F-InKind	Mcdonough Geoff Director	Director	550 Value: $3K
Feb 02, 2026 Buy	Restricted Stock Units M-Exempt	Mcdonough Geoff Director	Director	1 582 Value: $9K
Feb 02, 2026 Sell	Common Stock F-InKind	Howze Yalonda Interim CEO & President	CEO / President	495 Value: $3K
Feb 02, 2026 Buy	Restricted Stock Units M-Exempt	Howze Yalonda Interim CEO & President	CEO / President	1 673 Value: $9K
Jan 15, 2026 Sell	Common Stock F-InKind	Conway Kevin John Chief Financial Officer	C-Suite Officer	17 Value: $96

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

ABOUT GENERATION BIO CO.

Generation Bio Co., a genetic medicines company, develops therapies for the treatment of rare and prevalent diseases. The company provides a portfolio of programs, including programs for rare and prevalent diseases of the liver and retina. It also focuses on the diseases of skeletal muscle, central nervous system, and oncology. The company was formerly known as Torus Therapeutics, Inc. and changed its name to Generation Bio Co. in November 2017. ...

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