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 383 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 1364742 · View history	$684.61M 6,138,918 shares	0.02%	+50.23K(+0.80%)Added	SEC filing ↗ May 10, 2024	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$480.04M 4,304,516 shares	0.01%	+263.60K(+6.50%)Added	SEC filing ↗ May 10, 2024	▾
03	STATE STREET CORP CIK 93751 · View history	$135.62M 1,216,129 shares	0.01%	+20.66K(+1.70%)Added	SEC filing ↗ May 15, 2024	▾
04	PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history	$112.97M 1,012,996 shares	0.08%	-29.05K(-2.80%)Reduced	SEC filing ↗ May 14, 2024	▾
05	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$89.77M 804,870 shares	0.01%	+28.30K(+3.60%)Added	SEC filing ↗ May 13, 2024	▾
06	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$75.46M 676,645 shares	0.02%	-14.67K(-2.10%)Reduced	SEC filing ↗ May 10, 2024	▾
07	MORGAN STANLEY CIK 895421 · Amended · View history	$72.73M 652,177 shares	0.01%	+184.35K(+39.40%)Added	SEC filing ↗ Oct 17, 2024	▾
08	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$56.56M 507,518 shares	0.02%	-18.48K(-3.50%)Reduced	SEC filing ↗ May 15, 2024	▾
09	Jackson Square Partners, LLC CIK 1605911 · View history	$54.95M 492,764 shares	2.29%	+162.04K(+49.00%)Added	SEC filing ↗ May 8, 2024	▾
10	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$53.73M 481,779 shares	0.01%	+39.19K(+8.90%)Added	SEC filing ↗ May 15, 2024	▾
11	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$52.04M 466,635 shares	0.00%	-97.49K(-17.30%)Reduced	SEC filing ↗ Dec 26, 2024	▾
12	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$51.65M 463,138 shares	0.01%	-386(-0.10%)Reduced	SEC filing ↗ May 15, 2024	▾
13	NORGES BANK CIK 1374170 · Amended · View history	$50.61M 453,800 shares	0.01%	+13.48K(+3.10%)Added	SEC filing ↗ May 14, 2024	▾
14	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$49.01M 439,506 shares	0.01%	+8.39K(+1.90%)Added	SEC filing ↗ May 9, 2024	▾
15	BNP PARIBAS ASSET MANAGEMENT Holding S.A. CIK 1520354 · View history	$47.19M 423,151 shares	0.13%	+118.15K(+38.70%)Added	SEC filing ↗ May 8, 2024	▾
16	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$46.34M 415,529 shares	0.04%	-94.30K(-18.50%)Reduced	SEC filing ↗ May 15, 2024	▾
17	NORTHERN TRUST CORP CIK 73124 · View history	$41.06M 368,178 shares	0.01%	-7.41K(-2.00%)Reduced	SEC filing ↗ May 14, 2024	▾
18	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$38.63M 346,354 shares	0.02%	+199.83K(+136.40%)Added	SEC filing ↗ May 14, 2024	▾
19	REINHART PARTNERS, LLC. CIK 1080298 · Amended · View history	$37.87M 339,592 shares	1.54%	+339.59KNew	SEC filing ↗ Apr 3, 2024	▾
20	VOLORIDGE INVESTMENT MANAGEMENT, LLC CIK 1556921 · View history	$37.77M 338,707 shares	0.14%	+253.60K(+298.00%)Added	SEC filing ↗ May 15, 2024	▾

Showing 20 / 383 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

383

Cancelled or null records excluded

Disclosed shares

30,212,927

Not deduplicated across managers

Disclosed value

$3.37B

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 2024

Explore all 383 reporting institutions.

This page includes 20 of 383 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 383 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"054540208","quarter":"2024Q1","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

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.