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
22 Oct 24	BuyUS$10,077,000	Timothy Springer	Individual	300,000	US$33.59
26 Sep 24	BuyUS$1,440,829	Timothy Springer	Individual	50,000	US$30.87

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	1,401,938	7.51%
General Public	2,253,311	12.1%
Institutions	7,441,174	39.9%
Individual Insiders	7,566,249	40.5%

Dilution of Shares: TECX only recently listed within the past 12 months

Top Shareholders

Top 25 shareholders own 82.95% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
31.3%	Timothy Springer	5,838,204	US$115.4m	32.5%	no data
8.12%	FMR LLC	1,516,335	US$30.0m	0%	no data
7.51%	Deep Track Capital, LP	1,401,938	US$27.7m	0%	1.18%
5.25%	Andrew Kruse	980,000	US$19.4m	0%	no data
4.55%	EcoR1 Capital, LLC	849,143	US$16.8m	0%	1.04%
3.82%	Farallon Capital Management, L.L.C.	713,050	US$14.1m	37%	0.07%
3.42%	Polaris Venture Partners, Inc.	637,714	US$12.6m	-44%	14.35%
3.2%	5AM Venture Management, LLC	596,660	US$11.8m	-7.71%	4.51%
2.6%	Paradigm Biocapital Advisors LP	485,105	US$9.6m	0%	0.42%
1.94%	The Vanguard Group, Inc.	361,168	US$7.1m	0.03%	no data
1.56%	Alise Reicin	291,110	US$5.8m	0%	no data
1.32%	Balyasny Asset Management L.P.	247,000	US$4.9m	36.9%	0.01%
1.1%	BlackRock, Inc.	205,528	US$4.1m	5.37%	no data
1%	Chafen Lu	186,134	US$3.7m	0%	no data
0.89%	Susquehanna International Group, LLP, Asset Management Arm	166,452	US$3.3m	165%	0.01%
0.76%	Ikarian Capital, LLC	142,328	US$2.8m	-46.7%	1.06%
0.7%	Woodline Partners LP	130,109	US$2.6m	98.8%	0.02%
0.69%	Invesco Capital Management LLC	128,178	US$2.5m	0%	no data
0.68%	Christian Cortis	126,368	US$2.5m	0%	no data
0.56%	Goldman Sachs Group, Investment Banking and Securities Investments	104,793	US$2.1m	331%	no data
0.42%	Tang Capital Management, LLC	79,166	US$1.6m	0%	0.1%
0.42%	Atlas Venture L.P.	78,447	US$1.6m	-79.3%	0.28%
0.42%	Geode Capital Management, LLC	77,584	US$1.5m	0.92%	no data
0.39%	Walleye Capital LLC	73,517	US$1.5m	0.76%	0.01%
0.34%	Marcella Ruddy	64,130	US$1.3m	100%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/05/12 08:48
End of Day Share Price	2025/05/09 00:00
Earnings	2025/03/31
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 6 analysts. 5 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
Uy Ear	Mizuho Securities USA LLC
Yasmeen Rahimi	Piper Sandler Companies