NASDAQ:SPTX

Seaport Therapeutics . Common Stock Stock Insider Trading

*Your capital is at risk

$23.02

-0.600 (-2.54%)

At Close: Aug 10, 2026

Seaport Therapeutics . Common Stock Stock Insider Power

Based on the 10 latest insides trades, we have calculated the insider power to be positive at 100.00. In total, the insiders bought 32.77M and sold 51.45M SPTX shares in the last 10 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 10 transactions)	100.00
● Buy	32.77M shares
● Sell	51.45M shares
70% Buy Activity Negligible or No Correlation
No Significant Signals No statistically significant buy or sell signals detected in recent insider data.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 04, 2026 Buy	Common Stock C-Conversion	Puretech Health Plc 10 Percent Owner	10% Owner	965 255 Value: $16.4M
May 04, 2026 Buy	Common Stock C-Conversion	Puretech Health Plc 10 Percent Owner	10% Owner	2 681 265 Value: $45.6M
May 04, 2026 Buy	Common Stock C-Conversion	Puretech Health Plc 10 Percent Owner	10% Owner	12 736 014 Value: $0.22B
May 04, 2026 Sell	Series B Preferred Stock C-Conversion	Puretech Health Plc 10 Percent Owner	10% Owner	3 031 578 Value: $0
May 04, 2026 Sell	Series A-1 Preferred Stock C-Conversion	Puretech Health Plc 10 Percent Owner	10% Owner	40 000 000 Value: $0
May 04, 2026 Sell	Series A-2 Preferred Stock C-Conversion	Puretech Health Plc 10 Percent Owner	10% Owner	8 421 052 Value: $0
Apr 30, 2026 Buy	Common Stock	Puretech Health Plc 10 Percent Owner	10% Owner	0 Value: $0
Apr 30, 2026 Buy	Series A-1 Preferred Stock	Puretech Health Plc 10 Percent Owner	10% Owner	12 736 014 Value: $0.29B
Apr 30, 2026 Buy	Series A-2 Preferred Stock	Puretech Health Plc 10 Percent Owner	10% Owner	2 681 265 Value: $61.7M
Apr 30, 2026 Buy	Series B Preferred Stock	Puretech Health Plc 10 Percent Owner	10% Owner	965 255 Value: $22.2M

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