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 380 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	$459.51M 4,936,774 shares	0.01%	+109.20K(+2.30%)Added	SEC filing ↗ May 13, 2026	▾
02	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$231.61M 2,488,293 shares	0.01%	—	SEC filing ↗ May 8, 2026	▾
03	FMR LLC CIK 315066 · View history	$226.29M 2,431,121 shares	0.01%	+1.82M(+298.20%)Added	SEC filing ↗ May 15, 2026	▾
04	REINHART PARTNERS, LLC. CIK 1080298 · View history	$154.30M 1,657,745 shares	4.44%	+67.85K(+4.30%)Added	SEC filing ↗ Apr 13, 2026	▾
05	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$128.71M 1,382,770 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
06	Balyasny Asset Management L.P. CIK 1218710 · View history	$127.01M 1,364,540 shares	0.25%	+1.12M(+460.40%)Added	SEC filing ↗ May 15, 2026	▾
07	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$119.05M 1,279,005 shares	0.08%	-528.40K(-29.20%)Reduced	SEC filing ↗ May 15, 2026	▾
08	STATE STREET CORP CIK 93751 · View history	$110.68M 1,189,045 shares	0.00%	+2.82K(+0.20%)Added	SEC filing ↗ May 15, 2026	▾
09	BNP PARIBAS ASSET MANAGEMENT Holding S.A. CIK 1520354 · View history	$93.64M 1,006,028 shares	0.11%	-85.07K(-7.80%)Reduced	SEC filing ↗ May 14, 2026	▾
10	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$88.60M 951,914 shares	0.05%	-281.73K(-22.80%)Reduced	SEC filing ↗ May 15, 2026	▾
11	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$78.57M 844,097 shares	0.02%	+3.06K(+0.40%)Added	SEC filing ↗ May 7, 2026	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$75.53M 811,264 shares	0.00%	-106.48K(-11.60%)Reduced	SEC filing ↗ May 15, 2026	▾
13	PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history	$61.31M 658,652 shares	0.05%	-6.29K(-0.90%)Reduced	SEC filing ↗ May 11, 2026	▾
14	MORGAN STANLEY CIK 895421 · View history	$54.14M 581,636 shares	0.00%	+231.42K(+66.10%)Added	SEC filing ↗ May 15, 2026	▾
15	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$50.67M 544,421 shares	0.04%	+74.14K(+15.80%)Added	SEC filing ↗ May 15, 2026	▾
16	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$46.32M 497,624 shares	0.01%	-132.19K(-21.00%)Reduced	SEC filing ↗ May 15, 2026	▾
17	MANUFACTURERS LIFE INSURANCE COMPANY, THE CIK 928047 · View history	$45.77M 491,745 shares	0.04%	+477.70K(+3,402.50%)Added	SEC filing ↗ May 15, 2026	▾
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$41.49M 445,769 shares	0.01%	+14.57K(+3.40%)Added	SEC filing ↗ May 15, 2026	▾
19	LSV ASSET MANAGEMENT CIK 1050470 · View history	$39.98M 429,500 shares	0.09%	0(0.00%)Unchanged	SEC filing ↗ May 11, 2026	▾
20	NORTHERN TRUST CORP CIK 73124 · View history	$38.79M 416,703 shares	0.01%	+11.56K(+2.90%)Added	SEC filing ↗ May 14, 2026	▾

Showing 20 / 380 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

380

Cancelled or null records excluded

Disclosed shares

32,565,153

Not deduplicated across managers

Disclosed value

$3.03B

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 · Q1 2026

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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.