Axcelis Technologies Ownership

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

Recent Insider Transactions

NasdaqGS:ACLS Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Role	Shares	Max Price
20 May 25	SellUS$104,166	John Kurtzweil	Individual		1,682	US$61.93
06 Aug 24	SellUS$669,338	Jorge Titinger	Individual		6,086	US$109.98

Insider Trading Volume

Insider Buying: ACLS insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of ACLS?
Owner Type	Number of Shares	Ownership Percentage
State or Government	13,893	0.0426%
Individual Insiders	159,051	0.487%
Institutions	32,455,306	99.5%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 77.58% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
16.6%	BlackRock, Inc.	5,338,420	US$339.0m	-2%	no data
13.8%	The Vanguard Group, Inc.	4,439,902	US$282.0m	1%	no data
4.49%	Reinhart Partners, LLC	1,441,022	US$91.5m	39.1%	3.08%
3.88%	State Street Global Advisors, Inc.	1,248,230	US$79.3m	-4.07%	no data
3.55%	American Century Investment Management Inc	1,140,495	US$72.4m	7.58%	0.03%
3.18%	BNPP Asset Management Holding	1,020,732	US$64.8m	71.2%	0.09%
2.88%	Geode Capital Management, LLC	925,571	US$58.8m	3.1%	no data
2.85%	Bank of America Corporation, Asset Management Arm	916,896	US$58.2m	228%	0.02%
2.6%	PRIMECAP Management Company	835,066	US$53.0m	-8.88%	0.04%
2.57%	Boston Trust Walden Company	826,332	US$52.5m	0.76%	0.35%
2.18%	Dimensional Fund Advisors LP	701,275	US$44.5m	-3.22%	0.01%
1.8%	Grantham Mayo Van Otterloo & Co. LLC	579,387	US$36.8m	-24.2%	0.08%
1.72%	Amundi Asset Management SAS	551,047	US$35.0m	12.6%	0.01%
1.64%	T. Rowe Price Group, Inc.	526,422	US$33.4m	0.39%	no data
1.61%	Norges Bank Investment Management	515,957	US$32.8m	0%	no data
1.5%	Voloridge Investment Management, LLC	481,300	US$30.6m	116%	0.1%
1.5%	BlackBarn Capital Partners LP	480,441	US$30.5m	758%	9.82%
1.38%	Amundi Asset Management US, Inc.	442,638	US$28.1m	-5.64%	0.06%
1.37%	Goldman Sachs Group, Investment Banking and Securities Investments	438,783	US$27.9m	35.2%	0.01%
1.25%	Northern Trust Global Investments	401,931	US$25.5m	2.51%	no data
1.2%	Charles Schwab Investment Management, Inc.	386,007	US$24.5m	4.34%	no data
1.09%	UBS Asset Management AG	350,894	US$22.3m	7.53%	no data
1.04%	Boston Partners Global Investors, Inc.	333,039	US$21.2m	0.9%	0.01%
1.01%	Morgan Stanley, Investment Banking and Brokerage Investments	324,744	US$20.6m	-2.6%	no data
0.87%	Royce & Associates, LP	280,983	US$17.8m	-15.7%	0.16%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/06/09 11:21
End of Day Share Price	2025/06/06 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

Axcelis Technologies, 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
Ishan Majumdar	Baptista Research
Christopher Muse	Barclays
Mark Miller	Benchmark Company