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Tourmaline Bio, Inc.

TRMLDelisted
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001827506

Tourmaline Bio, Inc. was delisted in 2025; its insiders filed their last Form 4 on Oct 28, 2025; 134 institutions reported holding it in 13F filings for Q3 2025, worth $1.03B in total; no superinvestor held it.

Key figures

Insider buys
0
Open market, last 90 days
Insider sells
0
Open market, last 90 days
13F holders
134
Q3 2025, +25 vs. previous quarter
13F value
$1.03B
Reported value at the end of Q3 2025
Superinvestors holding
0
At the end of Q3 2025

Superinvestors holding TRML, Q3 2025

Go to the superinvestors tab

No superinvestor reported holding TRML at the end of Q3 2025.

Latest insider trades

Open-market purchases and sales by Tourmaline Bio, Inc. insiders from Form 4, newest first.

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Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 22, 2024 (view filing)Aug 211 dayKulkarni Sandeep ChidambarCEOPPurchase+1.78K$14.85+$26.4K+34.1%7.00K after
Aug 20, 2024 (view filing)Aug 164 daysKulkarni Sandeep ChidambarCEOPPurchase+5.22K$13.79+$72.0KNew position5.22K after
Jan 31, 2024 (view filing)Jan 292 daysMcDade MarkDirectorPPurchase+100.0K$32.50+$3.25M+28.7%448.4K after
Nov 20, 2023 (view filing)Nov 173 daysKulkarni Sandeep ChidambarCEOPPurchase+4.00K$16.99+$68.0K+0.6%729.7K after
Nov 20, 2023 (view filing)Nov 173 daysThiara ParvinderDirectorPPurchase+1.00K$17.31+$17.3K+1.2%83.8K after
Oct 27, 2023 (view filing)Oct 25-272 daysCastelein CaleyDirectorPPurchase+20.0K$14.03+$280.6K+4.0%516.5K after2 lots
Oct 26, 2023 (view filing)Oct 24-262 daysKulkarni Sandeep ChidambarCEOPPurchase+9.65K$11.49+$110.9K+1.3%725.7K after2 lots
Oct 26, 2023 (view filing)Oct 242 daysKantoff AaronDirectorPPurchase+7.50K$11.86+$89.0K+19.8%45.4K after
Oct 26, 2023 (view filing)Oct 24-252 daysThiara ParvinderDirectorPPurchase+7.00K$11.08+$77.5K+9.2%82.8K after2 lots
Jun 14, 2023 (view filing)Jun 12-142 daysIldstad SuzanneDirectorSSale−44.0K$2.55−$112.3K−1.2%3.77M after3 lots10b5-1

Top 10 13F holders, Q3 2025

The largest institutional positions in Tourmaline Bio, Inc. at the end of Q3 2025; share changes are against Q2 2025.

See all 134 holders
Institutions holding TRML in Q3 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Avoro Capital Advisors LLC2,555,555$122.2M1.58%00.0%Unchanged
QVT Financial LP2,154,653$103.1M11.44%00.0%Unchanged
BlackRock, Inc.1,517,777$72.6M0.00%−116,165−7.1%Reduced
TCG Crossover Management, LLC1,311,783$62.7M3.09%−165,810−11.2%Reduced
Pfizer Inc1,272,214$60.8M13.91%00.0%Unchanged
Vanguard Group Inc1,165,607$55.8M0.00%−41,428−3.4%Reduced
FIL Ltd1,027,690$49.2M0.04%+1,027,690New
Magnetar Financial LLC966,129$46.2M0.28%+966,129New
Qiming U.S. Ventures Management, LLC741,691$35.5M63.76%00.0%Unchanged
Vivaldi Asset Management, LLC695,757$33.3M2.15%+695,757New