NASDAQ:MCRB

Seres Therapeutics Stock Insider Trading

Healthcare > Biotechnology

Buy MCRB

*Your capital is at risk

$7.05

+0.450 (+6.82%)

At Close: Jun 23, 2026

Seres Therapeutics Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 78.05. In total, the insiders bought 387.98K and sold 4.36K MCRB 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)	78.05
● Buy	387.98K shares
● Sell	4.36K shares
81% Buy Activity Weak Negative Correlation
Buy Signal High Confidence Mar 04, 2026 Analysis Breakdown: Strongly supported by a very high Insider Power Score of 78.05. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (81% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
Aug 18, 2025 Sell	Common Stock S-Sale	Desrosier Thomas See Remarks	Officer	76 Value: $1K
Aug 18, 2025 Sell	Common Stock S-Sale	Shaff Eric D. Director	Director	217 Value: $4K
Aug 15, 2025 Buy	Common Stock M-Exempt	Shaff Eric D. Director	Director	333 Value: $6K
Aug 15, 2025 Buy	Common Stock M-Exempt	Shaff Eric D. Director	Director	391 Value: $7K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Shaff Eric D. Director	Director	333 Value: $6K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Shaff Eric D. Director	Director	391 Value: $7K
Aug 15, 2025 Buy	Common Stock M-Exempt	Desrosier Thomas See Remarks	Officer	111 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Desrosier Thomas See Remarks	Officer	133 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Desrosier Thomas See Remarks	Officer	111 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Desrosier Thomas See Remarks	Officer	133 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Henn Matthew R See Remarks	Officer	97 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Henn Matthew R See Remarks	Officer	141 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Henn Matthew R See Remarks	Officer	97 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Henn Matthew R See Remarks	Officer	141 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Young Teresa L. See Remarks	Officer	97 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Henn Matthew R See Remarks	Officer	97 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Henn Matthew R See Remarks	Officer	141 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Henn Matthew R See Remarks	Officer	97 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Desrosier Thomas See Remarks	Officer	133 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Desrosier Thomas See Remarks	Officer	111 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Desrosier Thomas See Remarks	Officer	133 Value: $2K
Aug 15, 2025 Buy	Common Stock M-Exempt	Desrosier Thomas See Remarks	Officer	111 Value: $2K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Shaff Eric D. Director	Director	391 Value: $7K
Aug 15, 2025 Buy	Restricted Stock Units M-Exempt	Shaff Eric D. Director	Director	333 Value: $6K
Aug 15, 2025 Buy	Common Stock M-Exempt	Shaff Eric D. Director	Director	391 Value: $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