Tectonic Therapeutic Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGM:TECX Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
11 Apr 25	BuyUS$2,299,015	Timothy Springer	Individual	141,923	US$16.73
07 Apr 25	BuyUS$8,550,000	Timothy Springer	Individual	500,000	US$17.10
07 Apr 25	SellUS$8,550,000	Polaris Venture Partners, Inc.	Company	500,000	US$17.10
04 Mar 25	SellUS$1,702,449	Vida Ventures Advisors, LLC	Company	67,781	US$33.25
05 Feb 25	BuyUS$249,964	Daniel Lochner	Individual	4,617	US$54.14
05 Feb 25	BuyUS$39,999,977	Timothy Springer	Individual	789,294	US$54.14

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of TECX?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	7,568,319	37.1%
Institutions	12,829,231	62.9%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 26.9%.

Top Shareholders

Top 25 shareholders own 95.06% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
31.2%	Timothy Springer	5,838,204	US$124.9m	0%	no data
15%	FMR LLC	2,806,686	US$60.0m	0.22%	no data
5.24%	Andrew Kruse	980,000	US$21.0m	0%	no data
4.42%	BlackRock, Inc.	827,853	US$17.7m	8.74%	no data
3.94%	Braidwell LP	736,867	US$15.8m	0%	0.52%
3.42%	Farallon Capital Management, L.L.C.	640,000	US$13.7m	-25%	0.07%
3.41%	Polaris Venture Partners, Inc.	637,714	US$13.6m	0%	10.63%
3.04%	The Vanguard Group, Inc.	569,480	US$12.2m	-2.55%	no data
2.73%	5AM Venture Management, LLC	511,660	US$10.9m	0%	3.36%
2.26%	Point72 Asset Management, L.P.	422,858	US$9.0m	83%	0.02%
2.03%	Prosight Management, LP	379,254	US$8.1m	-14.2%	1.7%
1.9%	Aberdeen Group Plc	356,176	US$7.6m	0%	no data
1.62%	The Bollard Group, LLC	302,953	US$6.5m	0%	0.15%
1.59%	Citadel Advisors LLC	298,388	US$6.4m	80.8%	0.01%
1.57%	Alise Reicin	293,180	US$6.3m	0%	no data
1.44%	Geode Capital Management, LLC	269,353	US$5.8m	-1.07%	no data
1.39%	Pale Fire Capital SE	259,726	US$5.6m	0%	0.6%
1.3%	Polygon Global Partners LLP	243,728	US$5.2m	6.51%	0.86%
1.27%	Millennium Management LLC	238,170	US$5.1m	218%	no data
1.12%	Kennedy Capital Management LLC	208,776	US$4.5m	10,600%	0.1%
1.08%	First Light Asset Management, LLC	202,393	US$4.3m	0%	0.35%
1.07%	Woodline Partners LP	200,000	US$4.3m	-37.8%	0.02%
1.03%	Sectoral Asset Management Inc.	192,770	US$4.1m	94.8%	0.81%
1.01%	StemPoint Capital LP	188,999	US$4.0m	373%	0.64%
0.99%	Chafen Lu	186,134	US$4.0m	0%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/11/28 08:47
End of Day Share Price	2025/11/26 00:00
Earnings	2025/09/30
Annual Earnings	2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Tectonic Therapeutic, Inc. is covered by 11 analysts. 8 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
David Risinger	Leerink Partners LLC
Cory Jubinville	LifeSci Capital, LLC
Uy Ear	Mizuho Securities USA LLC