Company · Ownership research

AXCELIS TECHNOLOGIES INC ACLS

CIK 0001113232 · CUSIP 054540208

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 054540208 (ACLS), not CUSIP 054540908 (ACLS), CUSIP 054540958 (ACLS), and does not merge CUSIPs.

This page lists the top 20 of 373 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$387.85M 4,827,575 shares	0.01%	-36.60K(-0.80%)Reduced	SEC filing ↗ Feb 12, 2026	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$331.20M 4,122,529 shares	0.00%	-63.17K(-1.50%)Reduced	SEC filing ↗ Jan 29, 2026	▾
03	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$145.21M 1,807,404 shares	0.08%	+835.24K(+85.90%)Added	SEC filing ↗ Feb 13, 2026	▾
04	REINHART PARTNERS, LLC. CIK 1080298 · View history	$127.73M 1,589,898 shares	3.83%	-20.43K(-1.30%)Reduced	SEC filing ↗ Feb 10, 2026	▾
05	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$99.11M 1,233,646 shares	0.05%	-112.11K(-8.30%)Reduced	SEC filing ↗ Feb 13, 2026	▾
06	STATE STREET CORP CIK 93751 · View history	$95.30M 1,186,227 shares	0.00%	-43.89K(-3.60%)Reduced	SEC filing ↗ Feb 13, 2026	▾
07	BNP PARIBAS ASSET MANAGEMENT Holding S.A. CIK 1520354 · View history	$87.66M 1,091,094 shares	0.10%	+160.73K(+17.30%)Added	SEC filing ↗ Feb 13, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$73.74M 917,747 shares	0.00%	-8.99K(-1.00%)Reduced	SEC filing ↗ Feb 9, 2026	▾
09	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$67.57M 841,040 shares	0.01%	+71.43K(+9.30%)Added	SEC filing ↗ Feb 12, 2026	▾
10	PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history	$53.42M 664,942 shares	0.04%	-168.73K(-20.20%)Reduced	SEC filing ↗ Feb 11, 2026	▾
11	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$50.60M 629,814 shares	0.01%	+135.04K(+27.30%)Added	SEC filing ↗ Mar 25, 2026	▾
12	FMR LLC CIK 315066 · View history	$49.06M 610,603 shares	0.00%	+59.20K(+10.70%)Added	SEC filing ↗ Feb 17, 2026	▾
13	Invesco Ltd. CIK 914208 · Amended · View history	$38.47M 478,897 shares	0.00%	+92.16K(+23.80%)Added	SEC filing ↗ Feb 19, 2026	▾
14	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$37.78M 470,285 shares	0.03%	+315.95K(+204.70%)Added	SEC filing ↗ Feb 17, 2026	▾
15	Boston Partners CIK 1386060 · View history	$35.07M 422,435 shares	0.04%	-46.31K(-9.90%)Reduced	SEC filing ↗ Feb 13, 2026	▾
16	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$34.64M 431,195 shares	0.01%	+4.08K(+1.00%)Added	SEC filing ↗ Feb 13, 2026	▾
17	LSV ASSET MANAGEMENT CIK 1050470 · View history	$34.51M 429,500 shares	0.08%	+114.60K(+36.40%)Added	SEC filing ↗ Feb 6, 2026	▾
18	Boston Trust Walden Corp CIK 1534866 · View history	$34.36M 427,736 shares	0.26%	-32.55K(-7.10%)Reduced	SEC filing ↗ Jan 28, 2026	▾
19	NORTHERN TRUST CORP CIK 73124 · View history	$32.55M 405,146 shares	0.00%	-29.84K(-6.90%)Reduced	SEC filing ↗ Feb 17, 2026	▾
20	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$30.78M 383,056 shares	0.00%	-149.05K(-28.00%)Reduced	SEC filing ↗ Feb 17, 2026	▾

Showing 20 / 373 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

373

Cancelled or null records excluded

Disclosed shares

31,310,409

Not deduplicated across managers

Disclosed value

$2.52B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

AXCELIS TECHNOLOGIES INC · Q4 2025

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.