NASDAQ:CBIO

Catalyst Biosciences Stock Insider Trading

> Biotechnology

Buy CBIO

*Your capital is at risk

$17.98

+0.98 (+5.73%)

At Close: Jun 03, 2026

Catalyst Biosciences Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 99.31. In total, the insiders bought 7.83M and sold 4.54M CBIO 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)	99.31
● Buy	7.83M shares
● Sell	4.54M shares
82% Buy Activity Negligible or No Correlation
Buy Signal High Confidence Jun 01, 2026 Analysis Breakdown: Strongly supported by a very high Insider Power Score of 99.31. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (82% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
May 01, 2024 Buy	Stock Option (right to buy) A-Award	Junius Daniel M Director	Director	40 000 Value: $64.8K
May 01, 2024 Buy	Stock Option (right to buy) A-Award	Jackson Scott Thomas Director	Director	40 000 Value: $64.8K
May 01, 2024 Buy	Stock Option (right to buy) A-Award	Andrews Patricia S Director	Director	40 000 Value: $64.8K
May 01, 2024 Buy	Stock Option (right to buy) A-Award	King Rachel K. Director	Director	40 000 Value: $64.8K
May 01, 2024 Buy	Stock Option (right to buy) A-Award	Pearson Timothy R Director	Director	40 000 Value: $64.8K
May 01, 2024 Buy	Stock Option (right to buy) A-Award	Goldberg Mark Alan Director	Director	40 000 Value: $64.8K
May 01, 2024 Buy	Stock Option (right to buy) A-Award	Koenig Scott Director	Director	40 000 Value: $64.8K
Mar 29, 2024 Buy	Common Stock A-Award	Junius Daniel M Director	Director	5 209 Value: $15.6K
Mar 29, 2024 Buy	Common Stock A-Award	King Rachel K. Director	Director	3 334 Value: $10.0K
Mar 29, 2024 Buy	Common Stock A-Award	Goldberg Mark Alan Director	Director	4 584 Value: $13.8K
Mar 29, 2024 Buy	Common Stock A-Award	Goldberg Mark Alan Director	Director	4 584 Value: $13.8K
Mar 29, 2024 Buy	Common Stock A-Award	King Rachel K. Director	Director	3 334 Value: $10.0K
Mar 29, 2024 Buy	Common Stock A-Award	Junius Daniel M Director	Director	5 209 Value: $15.6K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Johnson Bruce S SVP & Chief Commercial Officer	Officer	250 000 Value: $777.5K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Semerjian Harout Chief Executive Officer	CEO / President	695 000 Value: $2.16M
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Rock Edwin Chief Medical Officer	Officer	250 000 Value: $777.5K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Rath Chinmaya SVP And Chief Business Officer	Officer	250 000 Value: $777.5K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Hahn Brian M. SVP Finance, CFO	C-Suite Officer	250 000 Value: $777.5K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Hahn Brian M. SVP Finance, CFO	C-Suite Officer	250 000 Value: $777.5K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Rath Chinmaya SVP And Chief Business Officer	Officer	250 000 Value: $777.5K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Rock Edwin Chief Medical Officer	Officer	250 000 Value: $777.5K
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Semerjian Harout Chief Executive Officer	CEO / President	695 000 Value: $2.16M
Jan 12, 2024 Buy	Employee Stock Option (right to buy) A-Award	Johnson Bruce S SVP & Chief Commercial Officer	Officer	250 000 Value: $777.5K
Dec 29, 2023 Buy	Common stock A-Award	Andrews Patricia S Director	Director	5 191 Value: $12.3K
Dec 29, 2023 Buy	Common stock A-Award	King Rachel K. Director	Director	4 238 Value: $10.0K

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 CATALYST BIOSCIENCES INC

Catalyst Biosciences, Inc., a clinical-stage biopharmaceutical company, focuses on developing protease product candidates in the fields of hemostasis and complement regulation. The company's protease engineering platform creates improved or novel molecules to treat diseases that result from dysregulation of the complement system. It develops CB 2782-PEG, a component 3 (C3) degrader for the treatment of dry age-related macular degeneration (dAMD);...

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