ACLS · Axcelis Technologies Inc · Shareholders & Ownership
Every disclosed holder of ACLS in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns ACLS
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 31,062,017 | 100.58% |
| Insiders (Forms 3, 4, 5) | 455,946 | 1.48% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 636,474 | -2.06% |
| Registered funds (N-PORT, not summed) | 17,639,627 | 57.12% |
Shares outstanding: 30,881,489, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of ACLS
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,029,462 | ||
| 1.1 |
iShares Core S&P Small-Cap ETF
Fund
S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,851,581 | ||
| 1.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
805,510 | ||
| 1.3 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
289,688 | ||
| 1.4 |
iShares S&P Small-Cap 600 Growth ETF
Fund
S000004314 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
176,624 | ||
| 1.5 |
BlackRock Advantage Small Cap Core Fund
Fund
S000039982 · Registered fund · Aug 31, 2026
BlackRock Funds, not summed
|
132,158 | ||
| 2 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,125,902 | ||
| 2.1 |
FMR LLC
13G
CIK 315066 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
4,122,402 | ||
| 2.2 |
Fidelity Contrafund
Fund
S000006037 · Registered fund · Jun 30, 2026
Fidelity Contrafund, not summed
|
412,405 | ||
| 2.3 |
Strategic Advisers Fidelity U.S. Total Stock Fund
Fund
S000061481 · Registered fund · Aug 31, 2026
Fidelity Rutland Square Trust II, not summed
|
404,800 | ||
| 2.4 |
Fidelity Stock Selector Small Cap Fund
Fund
S000005453 · Registered fund · Jul 31, 2026
Fidelity Capital Trust, not summed
|
353,907 | ||
| 2.5 |
Fidelity Small Cap Index Fund
Fund
S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
343,166 | ||
| 3 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,478,878 | ||
| 4 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,386,518 | ||
| 5 |
|
1,231,109 | ||
| 5.1 |
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Fund
S000041317 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
281,637 | ||
| 5.2 |
State Street(R) SPDR(R) S & P 600(TM) Small Cap Growth ETF
Fund
S000006990 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
112,888 | ||
| 5.3 |
State Street(R) SPDR(R) S & P 600(TM) Small Cap Value ETF
Fund
S000006974 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
57,347 | ||
| 5.4 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
10,867 | ||
| 5.5 |
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund
S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
6,514 | ||
| 6 |
VICTORY CAPITAL MANAGEMENT INC
13F
CIK 1040188 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,134,007 | ||
| 6.1 |
Victory Pioneer Global Equity Fund
Fund
S000089821 · Registered fund · May 31, 2026
Victory Portfolios IV, not summed
|
98,977 | ||
| 6.2 |
VictoryShares US Small Mid Cap Value Momentum ETF
Fund
S000065161 · Registered fund · Jun 30, 2026
Victory Portfolios II, not summed
|
23,435 | ||
| 6.3 |
Victory Extended Market Index Fund
Fund
S000012941 · Registered fund · Jul 31, 2026
Victory Portfolios III, not summed
|
3,503 | ||
| 7 |
REINHART PARTNERS, LLC.
13F
CIK 1080298 · Registered investment adviser · Sep 30, 2026
|
1,060,636 | ||
| 7.1 |
Reinhart Genesis PMV Fund
Fund
S000055903 · Registered fund · Aug 31, 2026
Managed Portfolio Series, not summed
|
192,845 | ||
| 8 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
976,851 | ||
| 9 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
833,607 | ||
| 10 |
BNP PARIBAS ASSET MANAGEMENT Holding S.A.
13F
CIK 1520354 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
803,151 | ||
| 11 |
VANGUARD INFORMATION TECHNOLOGY INDEX FUND
Fund
S000004452 · Registered fund · May 31, 2026
VANGUARD WORLD FUND, not summed
|
780,738 | ||
| 12 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
709,266 | ||
| 12.1 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
142,884 | ||
| 12.2 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
100,395 | ||
| 12.3 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
94,628 | ||
| 12.4 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
55,631 | ||
| 12.5 |
U.S. CORE EQUITY 1 PORTFOLIO
Fund
S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
46,130 | ||
| 13 |
VANGUARD SMALL-CAP INDEX FUND
Fund
S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
704,939 | ||
| 14 |
Balyasny Asset Management L.P.
13F
CIK 1218710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
616,196 | ||
| 15 |
PRIMECAP MANAGEMENT CO/CA/
13F
CIK 763212 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
610,451 | ||
| 15.1 |
PRIMECAP Odyssey Aggressive Growth Fund
Fund
S000005541 · Registered fund · Jul 31, 2026
PRIMECAP Odyssey Funds, not summed
|
575,146 | ||
| 16 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
527,724 | ||
| 16.1 |
Invesco Main Street Small Cap Fund
Fund
S000064650 · Registered fund · Jun 30, 2026
AIM Growth Series (Invesco Growth Series), not summed
|
88,593 | ||
| 16.2 |
Invesco Dorsey Wright Technology Momentum ETF
Fund
S000013110 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
75,623 | ||
| 16.3 |
Invesco S&P SmallCap Information Technology ETF
Fund
S000028301 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
61,934 | ||
| 16.4 |
Invesco V.I. Main Street Small Cap Fund
Fund
S000064664 · Registered fund · Jun 30, 2026
AIM Variable Insurance Funds (Invesco Variable Insurance Funds), not summed
|
49,238 | ||
| 16.5 |
Invesco RAFI US 1500 Small-Mid ETF
Fund
S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
45,899 | ||
| 17 |
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund
S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
446,494 | ||
| 18 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
416,230 | ||
| 18.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
145,694 | ||
| 18.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
76,038 | ||
| 18.3 |
Schwab Fundamental U.S. Small Company ETF
Fund
S000040878 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
75,533 | ||
| 18.4 |
Schwab Small-Cap Equity Fund
Fund
S000005516 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
20,188 | ||
| 18.5 |
Schwab Fundamental U.S. Small Company Index Fund
Fund
S000016767 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
19,691 | ||
| 19 |
PRICE T ROWE ASSOCIATES INC /MD/
13F
CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
394,455 | ||
| 19.1 |
T. Rowe Price Integrated U.S. Small-Cap Growth Equity Fund
Fund
S000002074 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
|
198,158 | ||
| 19.2 |
T. Rowe Price Science & Technology Fund, Inc.
Fund
S000002119 · Registered fund · Jun 30, 2026
T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC., not summed
|
53,900 | ||
| 19.3 |
T. Rowe Price Small-Cap Index Fund
Fund
S000051327 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
|
4,728 | ||
| 19.4 |
T. Rowe Price Extended Equity Market Index Fund
Fund
S000002090 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
|
4,702 | ||
| 20 |
BARROW HANLEY MEWHINNEY & STRAUSS LLC
13F
CIK 313028 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
392,240 | ||
| 21 |
MANUFACTURERS LIFE INSURANCE COMPANY, THE
13F
CIK 928047 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
383,760 | ||
| 22 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
382,027 | ||
| 22.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
15,869 | ||
| 22.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
6,871 | ||
| 22.3 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
1,837 | ||
| 23 |
AMERICAN CENTURY COMPANIES INC
13F
CIK 748054 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
369,879 | ||
| 23.1 |
Small Cap Value Fund
Fund
S000005781 · Registered fund · Jun 30, 2026
American Century Capital Portfolios, Inc., not summed
|
160,000 | ||
| 23.2 |
Small Company Fund
Fund
S000005981 · Registered fund · Jun 30, 2026
American Century Quantitative Equity Funds, Inc., not summed
|
980 | ||
| 24 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
366,077 | ||
| 24.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
27 | ||
| 25 |
Boston Trust Walden Corp
13F
CIK 1534866 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
359,256 | ||
| 26 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
352,333 | ||
| 27 |
EMERALD ADVISERS, LLC
13F
CIK 1015083 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
330,469 | ||
| 28 |
|
320,891 | ||
| 29 |
Boston Partners
13F
CIK 1386060 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
303,929 | ||
| 30 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
235,253 | ||
| 30.1 |
Goldman Sachs Small Cap Value Fund
Fund
S000009323 · Registered fund · May 31, 2026
Goldman Sachs Trust, not summed
|
58,008 | ||
| 30.2 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
6,798 | ||
| 30.3 |
Multi-Manager U.S. Small Cap Equity Fund
Fund
S000051363 · Registered fund · Apr 30, 2026
Goldman Sachs Trust II, not summed
|
4,461 | ||
| 30.4 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Aug 31, 2026
GOLDMAN SACHS TRUST, not summed
|
419 | ||
| 31 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
220,809 | ||
| 32 |
EMERALD MUTUAL FUND ADVISERS TRUST
13F
CIK 1352895 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
219,443 | ||
| 32.1 |
Emerald Growth Fund
Fund
S000036390 · Registered fund · Apr 30, 2026
FINANCIAL INVESTORS TRUST, not summed
|
87,310 | ||
| 33 |
Allspring Global Investments Holdings, LLC
13F
CIK 1890906 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
219,357 | ||
| 33.1 |
Allspring Special Small Cap Value Fund
Fund
S000029108 · Registered fund · Jun 30, 2026
ALLSPRING FUNDS TRUST, not summed
|
143,518 | ||
| 33.2 |
Allspring Emerging Growth Fund
Fund
S000015703 · Registered fund · Jul 31, 2026
ALLSPRING FUNDS TRUST, not summed
|
11,428 | ||
| 33.3 |
Allspring VT Small Cap Growth Fund
Fund
S000007228 · Registered fund · Jun 30, 2026
Allspring VARIABLE TRUST, not summed
|
4,900 | ||
| 33.4 |
Allspring Disciplined Small Cap Fund
Fund
S000007342 · Registered fund · Jun 30, 2026
ALLSPRING FUNDS TRUST, not summed
|
3,017 | ||
| 34 |
PRINCIPAL FINANCIAL GROUP INC
13F
CIK 1126328 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
218,113 | ||
| 34.1 |
SmallCap Growth Fund I
Fund
S000007175 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
86,884 | ||
| 34.2 |
Principal U.S. Small-Cap ETF
Fund
S000055159 · Registered fund · Jun 30, 2026
Principal Exchange-Traded Funds, not summed
|
67,066 | ||
| 34.3 |
SmallCap S&P 600 Index Fund
Fund
S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
22,645 | ||
| 35 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
204,964 | ||
| 35.1 |
BNY Mellon US Small Cap Core Equity ETF
Fund
S000067262 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
|
1,129 | ||
| 36 |
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund
S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
|
194,154 | ||
| 37 |
|
184,124 | ||
| 38 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
159,533 | ||
| 39 |
|
154,900 | ||
| 40 |
American Beacon Small Cap Value Fund
Fund
S000001818 · Registered fund · Jul 31, 2026
AMERICAN BEACON FUNDS, not summed
|
142,459 | ||
| 41 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
139,242 | ||
| 42 |
Grantham, Mayo, Van Otterloo & Co. LLC
13F
CIK 1352662 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
135,580 | ||
| 42.1 |
GMO Small Cap Quality Fund
Fund
S000077554 · Registered fund · May 31, 2026
GMO TRUST, not summed
|
90,085 | ||
| 42.2 |
GMO Climate Change Fund
Fund
S000056707 · Registered fund · May 31, 2026
GMO TRUST, not summed
|
19,355 | ||
| 42.3 |
GMO Alternative Allocation Fund
Fund
S000065268 · Registered fund · May 31, 2026
GMO TRUST, not summed
|
8,674 | ||
| 42.4 |
GMO U.S. Equity Fund
Fund
S000004081 · Registered fund · May 31, 2026
GMO TRUST, not summed
|
6,873 | ||
| 42.5 |
GMO U.S. Small Cap Value Fund
Fund
S000065871 · Registered fund · May 31, 2026
GMO TRUST, not summed
|
6,822 | ||
| 43 |
ALPINE ASSOCIATES MANAGEMENT INC.
13F
CIK 1396835 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
134,905 | ||
| 44 |
Sagefield Capital LP
13F
CIK 1771179 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
133,770 | ||
| 45 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
133,044 | ||
| 46 |
FEDERATED HERMES, INC.
13F
CIK 1056288 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
132,331 | ||
| 47 |
Boston Trust Walden Small Cap Fund
Fund
S000009927 · Registered fund · Jun 30, 2026
Boston Trust Walden Funds, not summed
|
132,150 | ||
| 48 |
Emerald Growth Fund
Fund
S000093696 · Registered fund · Jul 31, 2026
RBB Fund, Inc., not summed
|
132,022 | ||
| 49 |
FIRST TRUST ADVISORS LP
13F
CIK 1125816 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
123,278 | ||
| 49.1 |
First Trust Nasdaq Semiconductor ETF
Fund
S000053947 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund VI, not summed
|
91,902 | ||
| 49.2 |
First Trust Active Factor Mid Cap ETF
Fund
S000066789 · Registered fund · Aug 31, 2026
First Trust Exchange-Traded Fund VIII, not summed
|
9,761 | ||
| 49.3 |
First Trust Active Factor Small Cap ETF
Fund
S000066790 · Registered fund · Aug 31, 2026
First Trust Exchange-Traded Fund VIII, not summed
|
5,120 | ||
| 49.4 |
First Trust Small Cap Core AlphaDEX Fund
Fund
S000017339 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
4,604 | ||
| 49.5 |
First Trust Small Cap Value AlphaDEX Fund
Fund
S000031807 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
1,238 | ||
| 50 |
JNL Multi-Manager Small Cap Value Fund
Fund
S000001798 · Registered fund · Jun 30, 2026
JNL Series Trust, not summed
|
114,227 |
96 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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