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ACLS · Axcelis Technologies Inc

Track ACLS — free Ask ALVIS about ACLS
$120.08 -8.03 (-6.27%) At close · Jul 28
Market Cap
$3.94B
Shares
30.73M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 390
Total Value: $2,898,703,494
Total Shares: 29,523,339
Showing 1–100 of 400 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Superinvestors Holding ACLS

All superinvestors →
Joel Greenblatt $1,111,468 Ray Dalio $772,657

Holder Concentration

Across 380 13F filers
Top Holder
16.3%
Jun 2023 → Mar 2026 · range 15.3% – 20.0%
of institutional value
Top 5
38.8%
Jun 2023 → Mar 2026 · range 38.8% – 43.6%
of institutional value
Top 10
56.2%
Jun 2023 → Mar 2026 · range 52.2% – 58.1%
of institutional value
HHI
506
Jun 2023 → Mar 2026 · range 506 – 672
Broadly held
Showing 100 of 400
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $459,514,917 15.85% 4,936,774
Mega FMR LLC $226,288,741 7.81% 2,431,121
Mid REINHART PARTNERS, LLC. $175,934,637 6.07% 928,660
Mega VANGUARD CAPITAL MANAGEMENT LLC $128,708,231 4.44% 1,382,770
Large Balyasny Asset Management L.P. $127,011,383 4.38% 1,364,540
Mega VICTORY CAPITAL MANAGEMENT INC $119,049,785 4.11% 1,279,005
Mega STATE STREET CORP $110,676,308 3.82% 1,189,045
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. $93,641,085 3.23% 1,006,028
Mega AMERICAN CENTURY COMPANIES INC $88,604,155 3.06% 951,914
Mega DIMENSIONAL FUND ADVISORS LP $78,568,547 2.71% 844,097
Mega GEODE CAPITAL MANAGEMENT, LLC $75,512,452 2.61% 811,264
Large Boston Trust Walden Corp $68,061,048 2.35% 359,256
Mega PRIMECAP MANAGEMENT CO/CA/ $61,307,328 2.11% 658,652
Mega MORGAN STANLEY $54,138,676 1.87% 581,636
Mega D. E. Shaw & Co., Inc. $50,674,706 1.75% 544,421
Mega GOLDMAN SACHS GROUP INC $46,318,841 1.60% 497,624
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $45,771,624 1.58% 491,745
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $41,492,178 1.43% 445,769
Large LSV ASSET MANAGEMENT $39,977,860 1.38% 429,500
Mega NORTHERN TRUST CORP Bank $38,786,712 1.34% 416,703
Mega UBS Group AG $35,113,218 1.21% 377,237
Mega PRICE T ROWE ASSOCIATES INC /MD/ $33,713,762 1.16% 362,202
Large Boston Partners $31,672,796 1.09% 340,275
Large Grantham, Mayo, Van Otterloo & Co. LLC $31,161,880 1.08% 334,786
Large Allspring Global Investments Holdings, LLC $24,064,530 0.83% 258,536
Mega JPMORGAN CHASE & CO $20,730,217 0.72% 222,714
Mega PRINCIPAL FINANCIAL GROUP INC $19,565,601 0.67% 210,202
Large FEDERATED HERMES, INC. $19,472,149 0.67% 209,198
Mega VANGUARD FIDUCIARY TRUST CO Bank $18,659,282 0.64% 200,465
Mid SEGALL BRYANT & HAMILL, LLC $18,650,532 0.64% 200,371
Mega Bank of New York Mellon Corp Bank $18,585,466 0.64% 199,672
Mega TWO SIGMA INVESTMENTS, LP $18,389,443 0.63% 197,566
Mid KENNEDY CAPITAL MANAGEMENT LLC $16,569,729 0.57% 178,016
Mega Invesco Ltd. $15,365,177 0.53% 165,075
Mega BNP PARIBAS ARBITRAGE, SA $13,466,628 0.46% 144,678
Mega FIRST TRUST ADVISORS LP $12,824,469 0.44% 137,779
Mid ROYCE & ASSOCIATES LP $11,661,062 0.40% 125,280
Mega BANK OF AMERICA CORP /DE/ Bank $10,331,785 0.36% 110,999
Large Public Sector Pension Investment Board Pension $10,219,346 0.35% 109,791
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $9,847,864 0.34% 105,800
Large First Eagle Investment Management, LLC $9,359,286 0.32% 100,551
Mid EMERALD ADVISERS, LLC $8,957,833 0.31% 96,238
Mega RHUMBLINE ADVISERS $8,126,535 0.28% 87,307
Mid Sagefield Capital LP $7,654,712 0.26% 82,238
Mega AMERIPRISE FINANCIAL INC $7,324,929 0.25% 78,695
Large Creative Planning $7,233,432 0.25% 77,712
Mid Portolan Capital Management, LLC $7,182,797 0.25% 77,168
Mega Legal & General Group Plc $6,693,288 0.23% 71,909
Mega Nuveen, LLC $6,644,514 0.23% 71,385
Mid Susquehanna Portfolio Strategies, LLC $6,349,266 0.22% 68,213
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $6,008,309 0.21% 64,550
Mega Swiss National Bank Bank $5,696,496 0.20% 61,200
Mega WELLS FARGO & COMPANY/MN $4,812,328 0.17% 51,701
Large Holocene Advisors, LP $4,800,601 0.17% 51,575
Large PEAK6 LLC $4,495,764 0.16% 48,300
Small ISTHMUS PARTNERS, LLC $4,469,883 0.15% 23,594
Large MERCER GLOBAL ADVISORS INC /ADV $4,465,606 0.15% 47,976
Large GREAT LAKES ADVISORS, LLC $4,430,048 0.15% 47,594
Mid EMERALD MUTUAL FUND ADVISERS TRUST Mutual Fund $4,413,108 0.15% 47,412
Large SEI INVESTMENTS CO $4,191,857 0.14% 45,035
Small GLOBEFLEX CAPITAL L P $4,137,871 0.14% 44,455
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $4,118,417 0.14% 44,246
Mega CITADEL ADVISORS LLC $4,076,904 0.14% 43,800
Mid NEEDHAM INVESTMENT MANAGEMENT LLC $3,955,900 0.14% 42,500
Small Old West Investment Management, LLC $3,954,131 0.14% 42,481
Mid HARBOR CAPITAL ADVISORS, INC. $3,893,629 0.13% 41,831
Mid ARGA Investment Management, LP $3,854,256 0.13% 41,408
Large STATE OF WISCONSIN INVESTMENT BOARD $3,835,547 0.13% 41,207
Large ABN AMRO INVESTMENT SOLUTIONS $3,808,513 0.13% 20,103
Mid OSSIAM $3,788,356 0.13% 40,700
Mega Amundi $3,781,560 0.13% 40,627
Large Allianz Asset Management GmbH $3,735,579 0.13% 40,133
Mega AQR CAPITAL MANAGEMENT LLC $3,724,593 0.13% 40,015
Mid Emerald Investment Advisers, LLC $3,701,233 0.13% 39,764
Large Empowered Funds, LLC $3,638,216 0.13% 39,087
Mid BRIDGES INVESTMENT MANAGEMENT INC $3,596,330 0.12% 38,637
Large BESSEMER GROUP INC $3,537,132 0.12% 38,001
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $3,389,973 0.12% 36,420
Mid Alberta Investment Management Corp $3,327,610 0.11% 35,750
Mega BARCLAYS PLC $3,292,330 0.11% 35,371
Mid Voleon Capital Management LP $3,278,370 0.11% 35,221
Mid State of Alaska, Department of Revenue $3,211,176 0.11% 16,950
Mega ALLIANCEBERNSTEIN L.P. $3,210,236 0.11% 34,489
Large TORONTO DOMINION BANK Bank $3,165,464 0.11% 34,008
Large Squarepoint Ops LLC $3,098,726 0.11% 33,291
Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM Pension $3,006,003 0.10% 15,867
Mega ENVESTNET ASSET MANAGEMENT INC $2,958,175 0.10% 31,781
Large PRUDENTIAL FINANCIAL INC $2,920,571 0.10% 31,377
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,866,864 0.10% 30,800
Large Cambridge Investment Research Advisors, Inc. $2,800,449 0.10% 14,782
Small Inspire Advisors, LLC $2,737,575 0.09% 29,411
Mega Mitsubishi UFJ Asset Management Co., Ltd. $2,710,582 0.09% 29,121
Mega DEUTSCHE BANK AG\ Bank $2,686,194 0.09% 28,859
Mid Louisiana State Employees Retirement System Pension $2,557,575 0.09% 13,500
Mega VANGUARD ASSET MANAGEMENT, Ltd $2,531,682 0.09% 27,199
Mega FRANKLIN RESOURCES INC $2,487,002 0.09% 26,719
Large CANADA LIFE ASSURANCE Co Insurance $2,341,334 0.08% 25,154
Mega CITIGROUP INC $2,293,955 0.08% 24,645
Mid PARADIGM CAPITAL MANAGEMENT INC/NY $2,233,920 0.08% 24,000
Mega JANE STREET GROUP, LLC $2,224,612 0.08% 23,900
Key facts CIK 1113232 CUSIP 054540208 13F (30d) 91 filings 90 filers Visit website Investor relations

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