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	Conway Kevin John Chief Financial Officer	C-Suite Officer	2 800 Value: $229.0K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Conway Kevin John Chief Financial Officer	C-Suite Officer	2 585 Value: $167.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Conway Kevin John Chief Financial Officer	C-Suite Officer	621 Value: $187.9K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Conway Kevin John Chief Financial Officer	C-Suite Officer	283 Value: $14.6K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Conway Kevin John Chief Financial Officer	C-Suite Officer	1 192 Value: $75.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Christensen Gustav Director	Director	5 200 Value: $988.0K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Christensen Gustav Director	Director	3 000 Value: $11.6K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Christensen Gustav Director	Director	2 500 Value: $120.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Appelhans Dannielle Director	Director	2 500 Value: $120.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Appelhans Dannielle Director	Director	3 840 Value: $275.7K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Appelhans Dannielle Director	Director	3 000 Value: $11.6K
Feb 09, 2026 Sell	Common Stock U-Tender	Appelhans Dannielle Director	Director	736 Value: $0
Feb 09, 2026 Sell	Common Stock U-Tender	Christensen Gustav Director	Director	13 142 Value: $1
Feb 09, 2026 Sell	Common Stock U-Tender	Atlas Venture Fund X, L.p. 10 Percent Owner	10% Owner	60 Value: $0
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Stehman-breen Catherine Director	Director	3 000 Value: $11.6K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Stehman-breen Catherine Director	Director	1 500 Value: $398.9K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Rowland Charles A Jr Director	Director	6 000 Value: $199.2K
Feb 09, 2026 Sell	Common Stock U-Tender	Rhodes Jason P Director	Director	60 Value: $0
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Rhodes Jason P Director	Director	3 000 Value: $11.6K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Rhodes Jason P Director	Director	5 200 Value: $988.0K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Rhodes Jason P Director	Director	1 500 Value: $398.9K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Rhodes Jason P Director	Director	1 920 Value: $118.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Rhodes Jason P Director	Director	2 500 Value: $120.8K
Feb 09, 2026 Sell	Stock Option (right to buy) D-Return	Rhodes Jason P Director	Director	6 000 Value: $199.2K
Feb 09, 2026 Sell	Common Stock U-Tender	Quinn Anthony G. Director	Director	7 283 Value: $1

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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