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	Johnson Kevin Bruce Chief Regulatory Officer	Officer	46 774 Value: $442.5K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Johnson Kevin Bruce Chief Regulatory Officer	Officer	58 000 Value: $986.0K
Oct 28, 2025 Sell	Common Stock U-Tender	Jones Susan Dana Chief Technology Officer	Officer	19 782 Value: $949.5K
Oct 28, 2025 Sell	Common Stock D-Return	Jones Susan Dana Chief Technology Officer	Officer	3 152 Value: $0
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Jones Susan Dana Chief Technology Officer	Officer	76 219 Value: $602.1K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Jones Susan Dana Chief Technology Officer	Officer	46 774 Value: $442.5K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Jones Susan Dana Chief Technology Officer	Officer	58 000 Value: $986.0K
Oct 28, 2025 Sell	Common Stock U-Tender	Middlekauff W Bradford Cbo, GC And Secretary	Officer	60 988 Value: $2.93M
Oct 28, 2025 Sell	Common Stock D-Return	Middlekauff W Bradford Cbo, GC And Secretary	Officer	8 213 Value: $0
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Middlekauff W Bradford Cbo, GC And Secretary	Officer	124 991 Value: $987.4K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Middlekauff W Bradford Cbo, GC And Secretary	Officer	46 774 Value: $442.5K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Middlekauff W Bradford Cbo, GC And Secretary	Officer	58 000 Value: $986.0K
Oct 28, 2025 Sell	Common Stock U-Tender	Robinson Ryan F. CFO	C-Suite Officer	14 366 Value: $689.6K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Robinson Ryan F. CFO	C-Suite Officer	25 845 Value: $359.8K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Robinson Ryan F. CFO	C-Suite Officer	16 000 Value: $151.4K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Robinson Ryan F. CFO	C-Suite Officer	76 400 Value: $1.09M
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Robinson Ryan F. CFO	C-Suite Officer	58 000 Value: $986.0K
Oct 28, 2025 Sell	Common Stock U-Tender	Kulkarni Sandeep Chidambar CEO	CEO / President	724 664 Value: $34.8M
Oct 28, 2025 Sell	Common Stock D-Return	Kulkarni Sandeep Chidambar CEO	CEO / President	30 387 Value: $0
Oct 28, 2025 Sell	Common Stock U-Tender	Kulkarni Sandeep Chidambar CEO	CEO / President	7 000 Value: $336.0K
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Kulkarni Sandeep Chidambar CEO	CEO / President	503 478 Value: $3.98M
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Kulkarni Sandeep Chidambar CEO	CEO / President	254 207 Value: $2.40M
Oct 28, 2025 Sell	Employee Stock Option (Right to Buy) D-Return	Kulkarni Sandeep Chidambar CEO	CEO / President	226 000 Value: $3.51M
Oct 28, 2025 Buy	Common Stock, par value $0.0001	Novartis Ag 10 Percent Owner	10% Owner	0 Value: $0
Oct 24, 2025 Sell	Common Stock G-Gift	Kantoff Aaron Director	Director	5 000 Value: $0

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