Axcelis Technologies Inc (ACLS) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

31,450,000Shares Outstanding

31,707,082Shares held by institutions

$4,514,454,335Value of institutional holdings

100.82%Institutional ownership %

4.77%Shares Changed QoQ

360No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Axcelis Technologies Inc (NASDAQ:ACLS) has 360 institutional investors with active 13F positions as of December 2025.

Collectively, these holders controlled 98.8% of Axcelis Technologies's outstanding shares in December 2025, up from 98.8% in September 2025.
Their total shares held in ACLS increased 3.12% quarter over quarter, and separately, investors owning Axcelis Technologies increased 11.8% from a year ago.
During the quarter, 182 of these 360 funds increased positions in ACLS, 121 reduced exposure, and 57 held steady.
Altogether, these fund groups held 31.06Mn shares in ACLS by December 2025, up by 939.06K shares quarter on quarter, and down 661.54K shares year over year.
REINHART PARTNERS, LLC. is the top holder of Axcelis Technologies as of December 31, 2025, with 1.66Mn shares representing 5.27% of outstanding stock.
The biggest buyers of Axcelis Technologies for the quarter ending December 2025 included REINHART PARTNERS, LLC. (67.85K), WESBANCO BANK INC (12.8K), OPPENHEIMER ASSET MANAGEMENT INC. (11.21K), WEALTH ENHANCEMENT ADVISORY SERVICES, LLC (5.47K), MOODY NATIONAL BANK TRUST DIVISION (5.3K).
Top sellers of ACLS stock for the quarter ending December 2025 included Boston Trust Walden Corp (49.21K), SG Americas Securities, LLC (10.79K), JAMES INVESTMENT RESEARCH, INC. (4.87K), Penbrook Management LLC (3.8K), QSM Asset Management Ltd (1.6K).
Business Quant data shows the 10 biggest positions in Axcelis Technologies as of December 2025 are held by REINHART PARTNERS, LLC. (1.66Mn), Boston Trust Walden Corp (378.52K), QSM Asset Management Ltd (51.57K), Janney Montgomery Scott LLC (22.15K), State of Alaska, Department of Revenue (21.98K), Louisiana State Employees Retirement System (13.6K), WESBANCO BANK INC (12.8K), Penbrook Management LLC (12.1K), OPPENHEIMER ASSET MANAGEMENT INC. (11.21K), MOODY NATIONAL BANK TRUST DIVISION (10.13K).

360 Institutional Holders

31,707,082 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	4,827,575	-36,598	-0.75%	$387,847,360.00
VANGUARD GROUP INC	31 Dec, 2025	4,122,529	-63,172	-1.51%	$331,203,980.00
VICTORY CAPITAL MANAGEMENT INC	31 Dec, 2025	1,807,404	835,242	85.92%	$145,206,837.00
REINHART PARTNERS, LLC.	31 Dec, 2025	1,589,898	-20,434	-1.27%	$127,733,577.00
Goldman Sachs Group Inc	31 Dec, 2025	1,259,628	764,853	154.59%	$101,198,514.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	1,233,646	-112,115	-8.33%	$99,111,119.00
State Street Corp	31 Dec, 2025	1,186,227	-43,889	-3.57%	$95,301,477.00
BNP Paribas Asset Management Holding S.A.	31 Dec, 2025	1,091,094	160,732	17.28%	$87,659.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	917,747	-8,992	-0.97%	$73,741,718.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	841,040	71,428	9.28%	$67,570,348.00
PRIMECAP MANAGEMENT CO/CA/	31 Dec, 2025	664,942	-168,734	-20.24%	$53,421,440.00
FMR LLC	31 Dec, 2025	610,603	59,205	10.74%	$49,055,805.00
Invesco Ltd.	31 Dec, 2025	478,897	92,162	23.83%	$38,474,584.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	470,285	315,947	204.71%	$37,782,697.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	431,195	4,082	0.96%	$34,642,206.00
LSV ASSET MANAGEMENT	31 Dec, 2025	429,500	114,600	36.39%	$34,506.00
Boston Trust Walden Corp	31 Dec, 2025	427,736	-32,551	-7.07%	$34,364,310.00
Boston Partners	31 Dec, 2025	422,435	-46,306	-9.88%	$35,065,691.00
Northern Trust Corp	31 Dec, 2025	405,146	-29,842	-6.86%	$32,549,430.00
Jpmorgan Chase & Co	31 Dec, 2025	357,502	-77,286	-17.78%	$28,721,711.00

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