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TRML Insider Trading

Insider Ownership Percentage: 13.00%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $0.00

Tourmaline Bio Insider Trading History Chart

This chart shows the insider buying and selling history at Tourmaline Bio by year and by quarter.

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Tourmaline Bio Share Price & Price History

Current Price: $47.98
Price Change: +0.30 (1.20%)
As of 10/28/2025 04:30 PM ET

This chart shows the closing price history over time for TRML up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Tourmaline Bio Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
8/16/2024Sandeep Chidambar KulkarniCEOBuy5,221$13.79$71,997.595,221View SEC Filing Icon  
1/29/2024Mark McdadeDirectorBuy100,000$32.50$3,250,000.00448,431View SEC Filing Icon  
11/17/2023Parvinder ThiaraDirectorBuy1,000$17.31$17,310.0083,782View SEC Filing Icon  
11/17/2023Sandeep Chidambar KulkarniCEOBuy4,000$16.99$67,960.00729,735View SEC Filing Icon  
10/27/2023Caley CasteleinDirectorBuy15,800$14.55$229,890.00516,519View SEC Filing Icon  
10/26/2023Sandeep Chidambar KulkarniCEOBuy5,000$12.25$61,250.00725,735View SEC Filing Icon  
10/24/2023Aaron KantoffDirectorBuy7,500$11.86$88,950.0045,391View SEC Filing Icon  
10/24/2023Sandeep Chidambar KulkarniCEOBuy4,650$10.68$49,662.00720,735View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Tourmaline Bio (NASDAQ:TRML)

91.89% of Tourmaline Bio stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at TRML by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Tourmaline Bio Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
11/19/2025Caitong International Asset Management Co. Ltd1,234$59K0.0%+325.5%0.005%Search for SEC Filing on Google Icon
11/17/2025First Trust Capital Management L.P.695,757$33.28M2.1%N/A2.708%Search for SEC Filing on Google Icon
11/17/2025TCG Crossover Management LLC1,311,783$62.74M3.1%-11.2%5.106%Search for SEC Filing on Google Icon
11/17/2025Water Island Capital LLC50,968$2.44M0.3%N/A0.198%Search for SEC Filing on Google Icon
11/17/2025Velan Capital Investment Management LP5,800$0.28M0.3%-98.5%0.023%Search for SEC Filing on Google Icon
11/17/2025Verition Fund Management LLC6,985$0.33M0.0%-82.6%0.027%Search for SEC Filing on Google Icon
11/17/2025Prelude Capital Management LLC27,282$1.31M0.1%N/A0.106%Search for SEC Filing on Google Icon
11/17/2025PenderFund Capital Management Ltd.3,000$0.14M0.0%N/A0.012%Search for SEC Filing on Google Icon
11/17/2025Mariner LLC5,579$0.27M0.0%N/A0.022%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC190,625$9.12M0.0%-21.8%0.742%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.8,063$0.39M0.0%-22.6%0.031%Search for SEC Filing on Google Icon
11/17/2025Jain Global LLC11,093$0.53M0.0%N/A0.043%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE84,140$4.02M0.0%-33.9%0.327%Search for SEC Filing on Google Icon
11/17/2025Alliancebernstein L.P.539,961$25.83M0.0%+1,985.6%2.102%Search for SEC Filing on Google Icon
11/14/2025Creative Planning13,287$0.64M0.0%+5.5%0.052%Search for SEC Filing on Google Icon
11/14/2025AQR Arbitrage LLC374,785$17.93M0.5%N/A1.459%Search for SEC Filing on Google Icon
11/14/2025Virtu Financial LLC26,273$1.26M0.1%N/A0.102%Search for SEC Filing on Google Icon
11/14/2025Twin Securities Inc.33,301$1.59M0.8%N/A0.130%Search for SEC Filing on Google Icon
11/14/2025Zurcher Kantonalbank Zurich Cantonalbank 2,515$0.12M0.0%N/A0.010%Search for SEC Filing on Google Icon
11/14/2025Acuta Capital Partners LLC268,451$12.84M13.3%-5.4%1.045%Search for SEC Filing on Google Icon
11/14/2025Brooklyn Investment Group15,584$0.75M0.1%+198.8%0.061%Search for SEC Filing on Google Icon
11/14/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC12,987$0.62M0.0%-23.2%0.051%Search for SEC Filing on Google Icon
11/14/2025FORA Capital LLC18,087$0.87M0.2%N/A0.070%Search for SEC Filing on Google Icon
11/13/2025Marshall Wace LLP143,731$6.88M0.0%N/A0.559%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG178,371$8.53M0.0%-22.2%0.694%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets4,841$0.23M0.0%+130.2%0.019%Search for SEC Filing on Google Icon
11/13/2025Franklin Resources Inc.12,984$0.62M0.0%-6.6%0.051%Search for SEC Filing on Google Icon
11/13/2025Magnetar Financial LLC966,129$46.21M0.3%N/A3.760%Search for SEC Filing on Google Icon
11/13/2025Legal & General Group Plc11,784$0.56M0.0%+47.0%0.046%Search for SEC Filing on Google Icon
11/13/2025Russell Investments Group Ltd.1,579$76K0.0%N/A0.006%Search for SEC Filing on Google Icon
11/13/2025Jefferies Financial Group Inc.17,363$0.83M0.0%N/A0.068%Search for SEC Filing on Google Icon
11/12/2025Gabelli Funds LLC119,850$5.73M0.0%N/A0.466%Search for SEC Filing on Google Icon
11/12/2025Gamco Investors INC. ET AL10,000$0.48M0.0%N/A0.039%Search for SEC Filing on Google Icon
11/12/2025GABELLI & Co INVESTMENT ADVISERS INC.31,050$1.49M0.2%N/A0.121%Search for SEC Filing on Google Icon
11/12/2025Barclays PLC27,801$1.33M0.0%-37.3%0.108%Search for SEC Filing on Google Icon
11/12/2025Dimensional Fund Advisors LP69,085$3.30M0.0%-39.3%0.269%Search for SEC Filing on Google Icon
11/12/2025Cresset Asset Management LLC8,333$0.40M0.0%N/A0.032%Search for SEC Filing on Google Icon
11/12/2025Quantbot Technologies LP1,948$93K0.0%N/A0.008%Search for SEC Filing on Google Icon
11/10/2025Greenland Capital Management LP7,032$0.34M0.0%N/A0.027%Search for SEC Filing on Google Icon
11/10/2025Ameritas Investment Partners Inc.1,463$70K0.0%-35.3%0.006%Search for SEC Filing on Google Icon
11/10/2025BCK Capital Management LP19,471$0.93M1.0%N/A0.076%Search for SEC Filing on Google Icon
11/10/2025China Universal Asset Management Co. Ltd.4,503$0.22M0.0%-12.7%0.018%Search for SEC Filing on Google Icon
11/7/2025Chicago Capital Management LLC112,406$5.38M4.8%N/A0.438%Search for SEC Filing on Google Icon
11/7/2025Skandinaviska Enskilda Banken AB publ 9,921$0.48M0.0%N/A0.039%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.1,165,607$55.75M0.0%-3.4%4.537%Search for SEC Filing on Google Icon
11/7/2025Credit Industriel ET Commercial29,661$1.42M0.1%N/A0.115%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.14,291$0.68M0.0%-8.4%0.056%Search for SEC Filing on Google Icon
11/7/2025HighTower Advisors LLC53,418$2.56M0.0%+26.1%0.208%Search for SEC Filing on Google Icon
11/6/2025Alpine Associates Management Inc.196,177$9.38M0.6%N/A0.764%Search for SEC Filing on Google Icon
11/6/2025Rhumbline Advisers27,057$1.29M0.0%-9.9%0.105%Search for SEC Filing on Google Icon
11/6/2025ABC Arbitrage SA139,800$6.69M0.7%N/A0.544%Search for SEC Filing on Google Icon
11/6/2025Versor Investments LP217,221$10.39M1.9%N/A0.845%Search for SEC Filing on Google Icon
11/5/2025Alps Advisors Inc.12,465$0.60M0.0%-10.0%0.049%Search for SEC Filing on Google Icon
11/3/2025AlphaQuest LLC7,323$0.35M0.0%+215.4%0.029%Search for SEC Filing on Google Icon
10/29/2025Amalgamated Bank567$27K0.0%-29.0%0.002%Search for SEC Filing on Google Icon
10/28/2025Wolverine Asset Management LLC12,120$0.58M0.0%N/A0.047%Search for SEC Filing on Google Icon
10/23/2025SG Americas Securities LLC20,182$0.97M0.0%-69.0%0.079%Search for SEC Filing on Google Icon
10/14/2025Farther Finance Advisors LLC2,146$0.10M0.0%+114.2%0.008%Search for SEC Filing on Google Icon
8/15/2025Tower Research Capital LLC TRC 3,214$51K0.0%+35.7%0.013%Search for SEC Filing on Google Icon
8/15/2025BBR Partners LLC15,000$0.24M0.0%+50.0%0.058%Search for SEC Filing on Google Icon
8/15/2025BNP Paribas Financial Markets2,103$34K0.0%+34.1%0.008%Search for SEC Filing on Google Icon
8/15/2025Balyasny Asset Management L.P.604,561$9.67M0.0%+2.0%2.354%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE127,371$2.04M0.0%-46.2%0.496%Search for SEC Filing on Google Icon
8/15/2025Adage Capital Partners GP L.L.C.135,637$2.17M0.0%-72.9%0.528%Search for SEC Filing on Google Icon
8/14/2025QVT Financial LP2,154,653$34.45M3.1%+46.2%8.389%Search for SEC Filing on Google Icon
8/14/2025Nantahala Capital Management LLC558,187$8.93M0.4%+4.8%2.173%Search for SEC Filing on Google Icon
8/14/2025California State Teachers Retirement System10,020$0.16M0.0%-4.6%0.039%Search for SEC Filing on Google Icon
8/14/2025Acuta Capital Partners LLC283,682$4.54M6.3%-33.5%1.104%Search for SEC Filing on Google Icon
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.10,421$0.17M0.0%-24.5%0.041%Search for SEC Filing on Google Icon
8/14/2025Velan Capital Investment Management LP393,889$6.30M6.2%-13.5%1.534%Search for SEC Filing on Google Icon
8/13/2025Invesco Ltd.25,626$0.41M0.0%+28.6%0.100%Search for SEC Filing on Google Icon
8/13/2025Virtus Investment Advisers LLC4,725$76K0.0%-35.2%0.018%Search for SEC Filing on Google Icon
8/12/2025American Century Companies Inc.40,564$0.65M0.0%+12.6%0.158%Search for SEC Filing on Google Icon
8/12/2025Rhumbline Advisers30,016$0.48M0.0%-9.1%0.117%Search for SEC Filing on Google Icon
8/12/2025Legal & General Group Plc8,017$0.13M0.0%-48.1%0.031%Search for SEC Filing on Google Icon
8/12/2025JPMorgan Chase & Co.15,599$0.25M0.0%-60.7%0.061%Search for SEC Filing on Google Icon
8/8/2025Creative Planning12,592$0.20M0.0%N/A0.049%Search for SEC Filing on Google Icon
8/8/2025SG Americas Securities LLC65,156$1.04M0.0%+80.1%0.254%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC467,087$7.47M0.0%-5.9%1.819%Search for SEC Filing on Google Icon
8/8/2025Nan Fung Trinity HK Ltd.227,090$3.63M0.4%N/A0.884%Search for SEC Filing on Google Icon
8/1/2025Y Intercept Hong Kong Ltd22,056$0.35M0.0%N/A0.086%Search for SEC Filing on Google Icon
7/31/2025AlphaQuest LLC2,322$37K0.0%-15.6%0.009%Search for SEC Filing on Google Icon
7/7/2025Wesbanco Bank Inc.26,000$0.42M0.0%N/A0.101%Search for SEC Filing on Google Icon
6/27/2025Goldman Sachs Group Inc.82,919$1.26M0.0%-21.1%0.323%Search for SEC Filing on Google Icon
5/29/2025Rhumbline Advisers33,033$0.50M0.0%-7.2%0.129%Search for SEC Filing on Google Icon
5/16/2025Woodline Partners LP160,086$2.44M0.0%-1.0%0.623%Search for SEC Filing on Google Icon
5/16/2025Octagon Capital Advisors LP905,000$13.77M1.5%N/A3.523%Search for SEC Filing on Google Icon
5/16/2025Goldman Sachs Group Inc.82,919$1.26M0.0%-21.1%0.323%Search for SEC Filing on Google Icon
5/16/2025Millennium Management LLC268,738$4.09M0.0%-26.3%1.046%Search for SEC Filing on Google Icon
5/16/2025Adage Capital Partners GP L.L.C.500,000$7.61M0.0%-16.7%1.947%Search for SEC Filing on Google Icon
5/15/2025Nantahala Capital Management LLC532,824$8.10M0.3%-0.8%2.074%Search for SEC Filing on Google Icon
5/15/2025QVT Financial LP1,473,369$22.41M2.1%+107.1%5.736%Search for SEC Filing on Google Icon
5/15/2025Velan Capital Investment Management LP455,412$6.93M7.1%+7.5%1.773%Search for SEC Filing on Google Icon
5/14/2025Jump Financial LLC20,893$0.32M0.0%N/A0.081%Search for SEC Filing on Google Icon
5/14/2025AlphaQuest LLC2,752$42K0.0%-23.9%0.011%Search for SEC Filing on Google Icon
5/14/2025EntryPoint Capital LLC24,972$0.38M0.2%N/A0.097%Search for SEC Filing on Google Icon
5/14/2025Hsbc Holdings PLC10,357$0.16M0.0%N/A0.040%Search for SEC Filing on Google Icon
5/14/2025Wellington Management Group LLP74,739$1.14M0.0%+9.0%0.291%Search for SEC Filing on Google Icon
5/13/2025Brooklyn Investment Group3,923$60K0.0%+148.9%0.015%Search for SEC Filing on Google Icon
5/13/2025American Century Companies Inc.36,018$0.55M0.0%+54.2%0.140%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Tourmaline Bio logo
Tourmaline Bio, Inc. operates as a clinical biotechnology company that develops medicines for patients with life-altering immune and inflammatory diseases. It develops TOUR006, a human anti-IL-6 monoclonal antibody that selectively binds to interleukin-6, a key proinflammatory cytokine involved in the pathogenesis of many autoimmune and inflammatory disorders. The company's development pipeline comprises medicines and therapies for the atherosclerotic cardiovascular disease (ASCVD) and thyroid eye disease (TED). The company was formerly known as Tourmaline Bio, LLC and changed its name to Tourmaline Bio, Inc. in September 2022. Tourmaline Bio, Inc. was founded in 2021 and is headquartered in New York, New York.
Read More on Tourmaline Bio

Today's Range

Now: $47.98
Low: $47.98
High: $48.00

50 Day Range

MA: $47.95
Low: $47.74
High: $48.16

52 Week Range

Now: $47.98
Low: $11.56
High: $48.27

Volume

783,700 shs

Average Volume

653,270 shs

Market Capitalization

$1.23 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

2.27

Who are the company insiders with the largest holdings of Tourmaline Bio?

Tourmaline Bio's top insider shareholders include:
  1. Mark Mcdade (Director)
  2. Sandeep Chidambar Kulkarni (CEO)
Learn More about top insider investors at Tourmaline Bio.

Who are the major institutional investors of Tourmaline Bio?

Tourmaline Bio's top institutional shareholders include:
  1. TCG Crossover Management LLC — 5.11%
  2. Vanguard Group Inc. — 4.54%
  3. Magnetar Financial LLC — 3.76%
  4. First Trust Capital Management L.P. — 2.71%
  5. Alliancebernstein L.P. — 2.10%
  6. AQR Arbitrage LLC — 1.46%
Learn More about top institutional investors of Tourmaline Bio stock.

Which major investors are selling Tourmaline Bio stock?

Within the last quarter, TRML stock was sold by these institutional investors:
  1. Velan Capital Investment Management LP
  2. TCG Crossover Management LLC
  3. Millennium Management LLC
  4. UBS Group AG
  5. SG Americas Securities LLC
  6. Dimensional Fund Advisors LP
  7. Bank of America Corp DE
  8. Vanguard Group Inc.

Which major investors are buying Tourmaline Bio stock?

Within the previous quarter, TRML stock was acquired by institutional investors including:
  1. Magnetar Financial LLC
  2. First Trust Capital Management L.P.
  3. Alliancebernstein L.P.
  4. AQR Arbitrage LLC
  5. Versor Investments LP
  6. Alpine Associates Management Inc.
  7. Marshall Wace LLP
  8. ABC Arbitrage SA
In the previous year, these company insiders have bought Tourmaline Bio stock:
  1. Mark Mcdade (Director)
  2. Sandeep Chidambar Kulkarni (CEO)
Learn More investors buying Tourmaline Bio stock.