Tectonic Therapeutic Ownership | Who Owns Tectonic Therapeutic?

Tectonic Therapeutic Ownership Summary

Tectonic Therapeutic is owned by 74.57% institutional investors, 37.97% insiders. Fmr is the largest institutional shareholder, holding 15.08% of TECX shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 5.82% of its assets in Tectonic Therapeutic shares.

TECX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Tectonic Therapeutic	74.57%	37.97%	-12.54%
Sector	Healthcare Stocks	245.53%	12.09%	-157.62%
Industry	Biotech Stocks	381.70%	11.71%	-293.40%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	2.83M	15.08%	$97.29M
Tcg crossover management	1.20M	6.42%	$41.42M
Abrdn	1.14M	6.08%	$39.25M
Blackrock funding, inc. /de	862.59K	4.60%	$29.65M
First light asset management	800.73K	4.27%	$27.52M
Farallon capital management	640.00K	3.42%	$10.04M
Baker bros. advisors lp	607.79K	3.24%	$20.89M
5am venture management	606.66K	3.23%	$20.85M
Vanguard group	599.90K	3.21%	$12.51M
Braidwell lp	596.90K	3.18%	$20.52M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
5am venture management	606.66K	7.24%	$20.85M
Superstring capital management lp	119.29K	1.84%	$1.87M
Sectoral asset management	71.01K	1.70%	$2.44M
First light asset management	800.73K	1.67%	$27.52M
Ally bridge group (ny)	138.59K	1.32%	$2.17M
Tcg crossover management	1.20M	1.00%	$41.42M
Aldebaran capital	36.80K	0.95%	$1.26M
Ikarian capital	205.84K	0.76%	$7.08M
Braidwell lp	596.90K	0.76%	$20.52M
Stempoint capital lp	189.00K	0.59%	$2.97M

Top Buyers

Holder	Shares	% Assets	Change
First light asset management	800.73K	1.67%	152.98K
Stempoint capital lp	189.00K	0.59%	149.00K
Sphera funds management	115.91K	0.38%	115.91K
Millennium management	165.53K	0.00%	107.18K
Vestal point capital, lp	425.00K	0.34%	97.00K

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
Pale fire capital se	-	-	-261.03K

New Positions

Holder	Shares	% Assets	Change	Value
Sphera funds management	115.91K	0.38%	115.91K	$1.82M
Jain global	71.50K	0.01%	71.50K	$1.12M
Hrt financial lp	44.54K	0.00%	44.54K	$1.53M
Trexquant investment lp	36.99K	0.01%	36.99K	$1.27M
Sixth street partners management company	30.44K	0.00%	30.44K	$1.05M

Sold Out

Holder	Change
Root financial partners	-5.00
True wealth design	-7.00
Mai capital management	-7.00
Fortitude family office	-15.00
Global wealth strategies & associates	-18.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	127	9.48%	13,996,333	1.34%	74	1.31%	64	-1.54%	42	16.67%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	1.14M	5.82%	-
Fidelity Growth Company Fund	754.39K	3.86%	35.04K
Fidelity Select Biotechnology	405.39K	2.07%	-
Vanguard Total Stock Mkt Idx Inv	364.41K	1.93%	15.00K
Vanguard Morn Total Stk Mkt Idx Investor	364.41K	1.93%	15.00K
Vanguard MStar Total Stk Mkt Idx Invest	364.41K	1.86%	-
iShares Russell 2000 ETF	270.32K	1.38%	-3.14K
abrdn Healthcare Investors	260.43K	1.33%	-278.32K
Fidelity Growth Company K6	260.14K	1.33%	10.51K
Fidelity Series Growth Company	205.64K	1.05%	9.12K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 30, 2026	McNamara Peter	Chief Scientific Officer	Sell	$12.35K
Aug 25, 2026	McNamara Peter	Chief Scientific Officer	Sell	$1.57K
Aug 12, 2026	McNamara Peter	Chief Scientific Officer	Sell	$1.50K
Jun 30, 2026	McNamara Peter	Chief Scientific Officer	Sell	$6.02K
May 04, 2026	Ruddy Marcella K.	Chief Medical Officer	Sell	$31.95K

Insider Transactions Trends

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

TECX Ownership FAQ

Who Owns Tectonic Therapeutic?

Tectonic Therapeutic shareholders are primarily institutional investors at 74.57%, followed by 37.97% insiders and -12.54% retail investors. The average institutional ownership in Tectonic Therapeutic's industry, Biotech Stocks , is 381.70%, which Tectonic Therapeutic falls below.

Who owns the most shares of Tectonic Therapeutic?

Tectonic Therapeutic’s largest shareholders are Fmr (2.83M shares, 15.08%), Tcg crossover management (1.2M shares, 6.42%), and Abrdn (1.14M shares, 6.08%). Together, they hold 27.58% 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 7.24% of its assets in 606.66K Tectonic Therapeutic shares, valued at 20.85M$.

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 5.82% of its total shares outstanding invested in 1.14M Tectonic Therapeutic shares.

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