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 7.12M 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	7.12M 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
Aug 07, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	61 488 Value: $11.2K
Aug 06, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	55 732 Value: $10.2K
Aug 06, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	55 732 Value: $10.2K
Aug 05, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	164 523 Value: $31.0K
Aug 05, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	164 523 Value: $31.0K
Aug 02, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	286 200 Value: $57.4K
Aug 02, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	286 200 Value: $57.4K
Aug 01, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	63 564 Value: $13.7K
Aug 01, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	63 564 Value: $13.7K
Jul 30, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	756 835 Value: $167.2K
Jul 30, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	756 835 Value: $167.2K
Jul 29, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	363 949 Value: $85.6K
Jul 29, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	363 949 Value: $85.6K
Jul 26, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	258 335 Value: $62.4K
Jul 26, 2024 Sell	Common Stock S-Sale	Invus Public Equities, L.p. 10 Percent Owner	10% Owner	258 335 Value: $62.4K
Jul 25, 2024 Buy	Common Stock	Siren, L.l.c. 10 Percent Owner	10% Owner	0 Value: $0
Jul 25, 2024 Buy	Common Stock	Siren, L.l.c. 10 Percent Owner	10% Owner	0 Value: $0
Jun 21, 2024 Buy	Common Stock P-Purchase	Rock Edwin Chief Medical Officer	Officer	115 000 Value: $30.7K
Jun 21, 2024 Buy	Common Stock P-Purchase	Rock Edwin Chief Medical Officer	Officer	115 000 Value: $30.7K
Jun 20, 2024 Buy	Common Stock P-Purchase	Rock Edwin Chief Medical Officer	Officer	190 000 Value: $48.1K
Jun 20, 2024 Buy	Common Stock P-Purchase	Rock Edwin Chief Medical Officer	Officer	190 000 Value: $48.1K
Jun 18, 2024 Buy	Common Stock P-Purchase	Hahn Brian M. SVP Finance, CFO	C-Suite Officer	17 500 Value: $4K
Jun 18, 2024 Buy	Common Stock P-Purchase	Hahn Brian M. SVP Finance, CFO	C-Suite Officer	17 500 Value: $4K
May 01, 2024 Buy	Stock Option (right to buy) A-Award	Koenig Scott 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

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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