Tectonic Therapeutic Ownership | Who Owns Tectonic Therapeutic?

Tectonic Therapeutic Ownership Summary

Tectonic Therapeutic is owned by 22.74% institutional investors, 39.34% insiders, and 37.92% retail investors. Fmr is the largest institutional shareholder, holding 15.37% of TECX shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 6.03% of its assets in Tectonic Therapeutic shares.

TECX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Tectonic Therapeutic	22.74%	39.34%	37.92%
Sector	Healthcare Stocks	35.70%	12.04%	52.26%
Industry	Biotech Stocks	35.48%	11.92%	52.60%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	2.82M	15.37%	$87.06M
Tcg crossover management	1.20M	6.58%	$37.24M
Abrdn	1.14M	6.23%	$35.29M
Blackrock funding, inc. /de	860.35K	4.70%	$26.59M
Braidwell lp	847.15K	4.62%	$26.19M
First light asset management	647.74K	3.54%	$20.02M
Farallon capital management	640.00K	3.42%	$10.04M
Baker bros. advisors lp	607.79K	3.32%	$18.79M
5am venture management	606.66K	3.31%	$18.75M
Vanguard group	599.90K	3.21%	$12.51M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
5am venture management	606.66K	5.21%	$18.75M
Superstring capital management lp	119.29K	1.84%	$1.87M
First light asset management	647.74K	1.79%	$20.02M
Ally bridge group (ny)	138.59K	1.32%	$2.17M
Tcg crossover management	1.20M	1.07%	$37.24M
Aldebaran capital	37.18K	0.88%	$1.15M
Braidwell lp	847.15K	0.87%	$26.19M
Stempoint capital lp	189.00K	0.59%	$2.97M
Sectoral asset management	19.06K	0.52%	$628.22K
Opaleye management	123.00K	0.50%	$3.80M

Top Buyers

Holder	Shares	% Assets	Change
Tcg crossover management	1.20M	1.07%	1.20M
First light asset management	647.74K	1.79%	647.74K
Marshall wace, llp	229.59K	0.01%	198.68K
Price t rowe associates inc /md/	164.06K	0.00%	164.06K
Ikarian capital	157.54K	0.40%	157.54K

Top Sellers

Holder	Shares	% Assets	Change
Deep track capital, lp	-	-	-1.40M
Vida ventures advisors	-	-	-1.03M
Ecor1 capital	-	-	-935.12K
Paradigm biocapital advisors lp	-	-	-485.11K
Point72 asset management	68.60K	0.00%	-423.73K

New Positions

Holder	Shares	% Assets	Change	Value
Tcg crossover management	1.20M	1.07%	1.20M	$37.24M
Price t rowe associates inc /md/	164.06K	0.00%	164.06K	$5.07M
Ikarian capital	157.54K	0.40%	157.54K	$4.87M
Ameriprise financial	143.43K	0.00%	143.43K	$4.43M
Sphera funds management	115.91K	0.38%	115.91K	$1.82M

Sold Out

Holder	Change
Sbi securities	-1.00
Advisor group	-1.00
True wealth design	-7.00
Srs capital advisors	-15.00
Global wealth strategies & associates	-18.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	63	-43.24%	4,166,953	-69.84%	22	0.42%	36	-44.62%	17	-34.62%
Dec 31, 2025	25	-75.49%	1,929,475	-84.06%	10	0.25%	14	-76.27%	6	-71.43%
Sep 30, 2025	24	-70.73%	1,119,638	-90.76%	5	0.14%	11	-78.85%	5	-61.54%
Jun 30, 2025	80	6.67%	12,108,929	23.80%	64	1.99%	53	-7.02%	13	18.18%
Mar 31, 2025	76	10.14%	11,027,607	43.97%	64	2.38%	57	26.67%	12	-20.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	1.14M	6.03%	23.09K
abrdn Healthcare Investors	770.94K	4.09%	-
Fidelity Growth Company Fund	719.24K	3.82%	16.78K
Fidelity Select Biotechnology	405.39K	2.15%	-37.50K
abrdn Life Sciences Investors	370.88K	1.97%	-
Vanguard Total Stock Mkt Idx Inv	349.41K	1.85%	-
iShares Russell 2000 ETF	262.14K	1.39%	2.44K
Fidelity Growth Company K6	249.15K	1.32%	3.91K
Fidelity Series Growth Company	196.32K	1.04%	4.50K
Kennedy Micro Cap	186.01K	0.99%	54.83K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 30, 2026	McNamara Peter	Chief Scientific Officer	Sell	$6.02K
May 04, 2026	Ruddy Marcella K.	Chief Medical Officer	Sell	$31.95K
Apr 01, 2026	Ruddy Marcella K.	Chief Medical Officer	Sell	$31.05K
Mar 06, 2026	Ruddy Marcella K.	Chief Medical Officer	Sell	$300.00K
Mar 06, 2026	McNamara Peter	Chief Scientific Officer	Sell	$7.53K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	3
2026 Q1	3	5
2025 Q4	-	-
2025 Q3	-	-
2025 Q2	10	1

TECX Ownership FAQ

Who Owns Tectonic Therapeutic?

Tectonic Therapeutic shareholders are primarily institutional investors at 22.74%, followed by 39.34% insiders and 37.92% retail investors. The average institutional ownership in Tectonic Therapeutic's industry, Biotech Stocks , is 35.48%, which Tectonic Therapeutic falls below.

Who owns the most shares of Tectonic Therapeutic?

Tectonic Therapeutic’s largest shareholders are Fmr (2.82M shares, 15.37%), Tcg crossover management (1.2M shares, 6.58%), and Abrdn (1.14M shares, 6.23%). Together, they hold 28.18% of Tectonic Therapeutic’s total shares outstanding.

Does Blackrock own Tectonic Therapeutic?

BlackRock is not among the top 10 institutional shareholders of Tectonic Therapeutic.

Who is Tectonic Therapeutic’s biggest shareholder by percentage of total assets invested?

5am venture management is Tectonic Therapeutic’s biggest shareholder by percentage of total assets invested, with 5.21% of its assets in 606.66K Tectonic Therapeutic shares, valued at 18.75M$.

Who is the top mutual fund holder of Tectonic Therapeutic shares?

Fidelity Growth Compy Commingled Pl S is the top mutual fund holder of Tectonic Therapeutic shares, with 6.03% of its total shares outstanding invested in 1.14M Tectonic Therapeutic shares.

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