Tourmaline Bio Ownership | Who Owns Tourmaline Bio?

Tourmaline Bio Ownership Summary

Tourmaline Bio is owned by 12.62% institutional investors, 14.62% insiders, and 72.76% retail investors. Avoro capital advisors is the largest institutional shareholder, holding 9.92% of TRML shares.

TRML Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Tourmaline Bio	12.62%	14.62%	72.76%
Sector	Healthcare Stocks	232.51%	10.72%	-143.23%
Industry	Biotech Stocks	384.56%	10.58%	-295.14%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Avoro capital advisors	2.56M	9.92%	$122.23M
Tcg crossover management	1.31M	5.09%	$62.74M
Fil	1.03M	3.99%	$49.15B
Magnetar financial	966.13K	3.75%	$46.21M
Qiming u.s. ventures management	741.69K	2.88%	$35.48M
Pictet asset management sa	682.13K	2.65%	$10.91M
Tig advisors	619.76K	2.41%	$29.64M
Balyasny asset management	604.56K	2.35%	$9.67M
Alliancebernstein	539.96K	2.10%	$25.83M
Nexpoint asset management	455.36K	1.77%	$21.78M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Qiming u.s. ventures management	741.69K	63.76%	$35.48M
Acuta capital partners	268.45K	13.27%	$12.84M
Tcg crossover management	1.31M	3.09%	$62.74M
Harvest management	100.00K	2.07%	$4.78M
Allostery investments lp	9.36K	1.91%	$149.60K
Nexpoint asset management	455.36K	1.89%	$21.78M
Tig advisors	619.76K	1.76%	$29.64M
Avoro capital advisors	2.56M	1.58%	$122.23M
Twin securities	33.30K	0.79%	$1.59M
Aqr arbitrage	374.79K	0.46%	$17.93M

Top Buyers

Holder	Shares	% Assets	Change
Fil	1.03M	0.04%	1.03M
Magnetar financial	966.13K	0.28%	966.13K
Tig advisors	619.76K	1.76%	619.76K
Alliancebernstein	539.96K	0.01%	514.07K
Nexpoint asset management	455.36K	1.89%	455.36K

Top Sellers

Holder	Shares	% Assets	Change
Ra capital management	-	-	-2.54M
Qvt financial lp	-	-	-2.15M
Blackrock funding, inc. /de	-	-	-1.52M
Pfizer	-	-	-1.27M
Vanguard group	-	-	-1.17M

New Positions

Holder	Shares	% Assets	Change	Value
Fil	1.03M	0.04%	1.03M	$49.15B
Magnetar financial	966.13K	0.28%	966.13K	$46.21M
Tig advisors	619.76K	1.76%	619.76K	$29.64M
Nexpoint asset management	455.36K	1.89%	455.36K	$21.78M
Aqr arbitrage	374.79K	0.46%	374.79K	$17.93M

Sold Out

Holder	Change
Sbi securities	-2.00
Amundi	-7.00
Smartleaf asset management	-13.00
True wealth design	-18.00
Pnc financial services group	-20.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	43	-59.81%	3,250,140	-86.49%	12	0.14%	20	-62.26%	14	-54.84%
Jun 30, 2025	106	-5.36%	24,060,749	3.67%	93	1.14%	52	-5.45%	31	-
Mar 31, 2025	113	13.00%	23,954,552	8.75%	93	1.28%	55	-8.33%	31	40.91%
Dec 31, 2024	102	10.87%	22,862,128	8.70%	88	1.33%	62	37.78%	22	-18.52%
Sep 30, 2024	92	6.98%	21,032,430	-0.59%	81	1.21%	45	-18.18%	27	68.75%

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 21, 2024	Kulkarni Sandeep Chidambar	CEO	Buy	$26.42K
Aug 16, 2024	Kulkarni Sandeep Chidambar	CEO	Buy	$72.00K
Jan 29, 2024	MCDADE MARK	-	Buy	$3.25M

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	-
2025 Q3	-	-
2025 Q2	-	-
2025 Q1	-	-
2024 Q3	2	-

TRML Ownership FAQ

Who Owns Tourmaline Bio?

Tourmaline Bio shareholders are primarily institutional investors at 12.62%, followed by 14.62% insiders and 72.76% retail investors. The average institutional ownership in Tourmaline Bio's industry, Biotech Stocks , is 384.56%, which Tourmaline Bio falls below.

Who owns the most shares of Tourmaline Bio?

Tourmaline Bio’s largest shareholders are Avoro capital advisors (2.56M shares, 9.92%), Tcg crossover management (1.31M shares, 5.09%), and Fil (1.03M shares, 3.99%). Together, they hold 19.01% of Tourmaline Bio’s total shares outstanding.

Does Blackrock own Tourmaline Bio?

BlackRock is not among the top 10 institutional shareholders of Tourmaline Bio.

Who is Tourmaline Bio’s biggest shareholder by percentage of total assets invested?

Qiming u.s. ventures management is Tourmaline Bio’s biggest shareholder by percentage of total assets invested, with 63.76% of its assets in 741.69K Tourmaline Bio shares, valued at 35.48M$.

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