Adicet Bio Ownership

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

Recent Insider Transactions

NasdaqCM:ACET Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Role	Shares	Max Price
08 Oct 25	BuyUS$5,000,000	OrbiMed Advisors LLC	Company		312,500	US$16.00

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 ACET?
Owner Type	Number of Shares	Ownership Percentage
Public Companies	60,511	0.563%
Individual Insiders	84,474	0.786%
Hedge Funds	625,000	5.81%
VC/PE Firms	1,976,193	18.4%
Institutions	3,867,081	36%
General Public	4,135,981	38.5%

Dilution of Shares: Shareholders have been substantially diluted in the past year, with total shares outstanding growing by 88.7%.

Top Shareholders

Top 25 shareholders own 59.9% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
9.56%	OrbiMed Advisors LLC	1,027,944	US$6.7m	43.7%	0.1%
8.82%	RA Capital Management, L.P.	948,249	US$6.1m	101%	0.07%
5.83%	Franklin Resources, Inc.	626,571	US$4.1m	0%	no data
5.81%	Woodline Partners LP	625,000	US$4.0m	0%	0.02%
2.71%	The Vanguard Group, Inc.	291,277	US$1.9m	42.4%	no data
2.55%	Adage Capital Management, L.P.	274,375	US$1.8m	0%	no data
2.33%	Prosight Management, LP	250,244	US$1.6m	0%	0.34%
2.26%	Renaissance Technologies LLC	242,945	US$1.6m	113%	no data
2.18%	The Goldman Sachs Group, Inc.	234,510	US$1.5m	0.01%	no data
2.05%	Stonepine Capital Management LLC	220,011	US$1.4m	0%	0.82%
1.9%	Alyeska Investment Group, L.P.	203,799	US$1.3m	397%	no data
1.71%	Abingworth LLP	184,295	US$1.2m	0%	2.15%
1.69%	Acadian Asset Management LLC	181,395	US$1.2m	28.1%	no data
1.47%	Nextbio Capital Management Lp	157,827	US$1.0m	0%	0.56%
1.35%	Two Sigma Investments, LP	144,796	US$936.8k	171%	no data
1.2%	ADAR1 Capital Management, LLC	128,646	US$832.3k	0%	0.07%
1.04%	Two Sigma Advisers, LP	111,336	US$720.3k	128%	no data
1%	Citadel Advisors LLC	107,814	US$697.6k	195%	no data
0.87%	Dafna Capital Management, LLC	93,812	US$607.0k	0%	0.15%
0.83%	Geode Capital Management, LLC	88,856	US$574.9k	101%	no data
0.58%	Burkehill Global Management, LP	62,500	US$404.4k	0%	0.03%
0.56%	Regeneron Pharmaceuticals, Inc.	60,511	US$391.5k	0%	no data
0.55%	Luminus Management, LLC	59,558	US$385.3k	0%	0.29%
0.52%	Bridgeway Capital Management, LLC	56,350	US$364.6k	0%	0.01%
0.52%	Squarepoint OPS LLC	55,723	US$360.5k	1,820%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/03/29 15:41
End of Day Share Price	2026/03/27 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

Adicet Bio, Inc. is covered by 11 analysts. 6 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
Justin Zelin	B. Riley Securities, Inc.
John Newman	Canaccord Genuity
Yatin Suneja	Guggenheim Securities, LLC