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 Feb 26	BuyUS$52,750	Alise Reicin	Individual	2,500	US$21.10
10 Feb 26	BuyUS$129,660	Daniel Lochner	Individual	6,000	US$21.61
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

Insider Trading Volume

Insider Buying: TECX 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
VC/PE Firms	1,169,760	5.25%
Individual Insiders	6,609,329	29.7%
Institutions	14,507,928	65.1%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 27.3%.

Top Shareholders

Top 25 shareholders own 106.04% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
31.1%	Timothy Springer	5,838,204	US$134.3m	0%	no data
15%	FMR LLC	2,807,347	US$64.6m	0.02%	no data
6.23%	TCG Crossover Management, LLC	1,169,760	US$26.9m	0%	0.82%
6.08%	Aberdeen Group Plc	1,141,824	US$26.3m	221%	0.01%
4.94%	Braidwell LP	927,524	US$21.3m	25.9%	0.81%
4.81%	Baker Bros. Advisors LP	903,400	US$20.8m	803%	0.11%
4.55%	BlackRock, Inc.	854,363	US$19.7m	3.2%	no data
3.4%	Polaris Venture Partners, Inc.	637,714	US$14.7m	0%	24.61%
3.23%	5AM Venture Management, LLC	606,660	US$14.0m	18.6%	3.54%
3.19%	The Vanguard Group, Inc.	599,898	US$13.8m	5.34%	no data
3.06%	OrbiMed Advisors LLC	574,600	US$13.2m	0%	0.19%
2.62%	Point72 Asset Management, L.P.	492,332	US$11.3m	16.4%	0.02%
1.75%	Vestal Point Capital, LP	328,000	US$7.5m	0%	0.26%
1.69%	Citadel Advisors LLC	317,617	US$7.3m	6.44%	0.01%
1.68%	Alise Reicin	314,558	US$7.2m	3.42%	no data
1.61%	The Bollard Group, LLC	302,953	US$7.0m	0%	0.2%
1.6%	Millennium Management LLC	300,820	US$6.9m	26.3%	no data
1.4%	Geode Capital Management, LLC	263,560	US$6.1m	-2.15%	no data
1.39%	Pale Fire Capital SE	261,026	US$6.0m	0.5%	0.55%
1.25%	Prosight Management, LP	235,000	US$5.4m	-38%	1.12%
1.14%	Opaleye Management Inc.	214,747	US$4.9m	0%	0.62%
1.11%	Kennedy Capital Management LLC	209,225	US$4.8m	0.22%	0.1%
1.11%	State Street Global Advisors, Inc.	209,125	US$4.8m	26.3%	no data
1.07%	Woodline Partners LP	200,000	US$4.6m	0%	0.02%
1.06%	Squarepoint OPS LLC	199,646	US$4.6m	205%	0.01%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/03/03 15:48
End of Day Share Price	2026/03/03 00:00
Earnings	2025/12/31
Annual Earnings	2025/12/31

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 12 analysts. 7 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