Tourmaline Bio Stock Insider Trading

Healthcare > Biotechnology

Buy TRML

*Your capital is at risk

$47.98

+0 (+0%)

At Close: Jan 27, 2026

Tourmaline Bio Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -90.44. In total, the insiders bought 1.65M and sold 4M TRML 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)	-90.44
● Buy	1.65M shares
● Sell	4M shares
49% Buy Activity Strong Negative Correlation
Sell Signal High Confidence Oct 28, 2025 Analysis Breakdown: Strongly supported by a very low Insider Power Score of -90.44. Partially supported by a negative historical correlation. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Siegall Clay B Director	Director	20 000 Value: $371.0K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Siegall Clay B Director	Director	15 000 Value: $208.7K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Siegall Clay B Director	Director	16 800 Value: $314.7K
Oct 28, 2025 Sell	Common Stock U-Tender	Thiara Parvinder Director	Director	83 782 Value: $4.02M
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Thiara Parvinder Director	Director	10 000 Value: $94.6K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Thiara Parvinder Director	Director	10 000 Value: $139.1K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Thiara Parvinder Director	Director	16 800 Value: $314.7K
Oct 28, 2025 Sell	Common Stock U-Tender	Srivastava Sapna Director	Director	518 Value: $24.9K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Srivastava Sapna Director	Director	20 000 Value: $189.2K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Srivastava Sapna Director	Director	10 000 Value: $139.1K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Srivastava Sapna Director	Director	16 800 Value: $314.7K
Oct 28, 2025 Sell	Common Stock U-Tender	Mcdade Mark Director	Director	448 431 Value: $21.5M
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Mcdade Mark Director	Director	20 000 Value: $189.2K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Mcdade Mark Director	Director	10 000 Value: $139.1K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Mcdade Mark Director	Director	16 800 Value: $314.7K
Oct 28, 2025 Sell	Common Stock U-Tender	Kantoff Aaron Director	Director	88 281 Value: $4.24M
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Kantoff Aaron Director	Director	10 000 Value: $139.1K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Kantoff Aaron Director	Director	16 800 Value: $314.7K
Oct 28, 2025 Sell	Common Stock U-Tender	Castelein Caley Director	Director	431 939 Value: $20.7M
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Castelein Caley Director	Director	10 000 Value: $94.6K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Castelein Caley Director	Director	10 000 Value: $139.1K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Castelein Caley Director	Director	16 800 Value: $314.7K
Oct 28, 2025 Sell	Common Stock U-Tender	Johnson Kevin Bruce Chief Regulatory Officer	Officer	40 538 Value: $1.95M
Oct 28, 2025 Sell	Common Stock D-Return	Johnson Kevin Bruce Chief Regulatory Officer	Officer	11 046 Value: $0
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Johnson Kevin Bruce Chief Regulatory Officer	Officer	96 146 Value: $759.6K

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