ACLS
Axcelis Techs (ACLS)
NASDAQ
$175.00+$3.94 (+2.30%)
Price as of Jun 23, 2026 7:51 PM EDT
  • $5.7B
    Market Cap
  • 176.45%
    1-Year Change
  • Semiconductor Equipment & Materials
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK INC.
18.89%
5.8M
-332,111 (-5.72%)
Jun 30, 2024
BLACKROCK FUNDING, INC. /DE
17.72%
5.4M
+108,636 (+1.99%)
Dec 31, 2024
BLACKROCK, INC.
16.06%
4.9M
+109,199 (+2.21%)
Mar 31, 2026
VANGUARD GROUP INC
13.41%
4.1M
-63,172 (-1.53%)
Dec 31, 2025
N/A
8.10%
2.5M
+2.5M (+100.00%)
Mar 31, 2026
FMR LLC
7.91%
2.4M
+1.8M (+74.88%)
Mar 31, 2026
REINHART PARTNERS, INC.
5.39%
1.7M
+67,847 (+4.09%)
Mar 31, 2026

Current Ownership Distribution

  • Institutions542.6M (74.70%)
  • Mutual Funds181.7M (25.02%)
  • Insiders2.1M (0.29%)
  • Other0 (0.00%)

Insider Transactions

  • 0.29% (2.1M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 1
    Number of InsiderSelling (last 12 months)
  • $24.2M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Ryzhik David
SVP Interim CFO
In Kind
Jun 16, 2026
$13,440.22
76
$176.84
9,955
Low Russell
PRESIDENT AND CEO
Sell
Apr 01, 2026
$117,010.64
1,244
$94.06
132,282
Low Russell
PRESIDENT AND CEO
Sell
Mar 24, 2026
$111,960.00
1,244
$90.00
133,526
Blumenstock Gerald M
EVP, Research, Dev. & Eng.
In Kind
Mar 02, 2026
$97,056.18
1,121
$86.58
17,540
COOGAN JAMES GORDON
EVP AND CFO
In Kind
Mar 02, 2026
$155,844.00
1,800
$86.58
37,144
Mahoney Robert John
EVP Global Operations
In Kind
Mar 02, 2026
$49,610.34
573
$86.58
14,633
Mahoney Robert John
EVP Global Operations
Award
Jan 15, 2026
$0.00
1,734
$0.00
15,206
COOGAN JAMES GORDON
EVP AND CFO
In Kind
Oct 16, 2025
$59,621.06
713
$83.62
38,944
Redinbo Greg
EVP MARKETING AND APPLICATIONS
In Kind
Sep 15, 2025
$18,158.40
208
$87.30
32,661
Tatnall Christopher
EVP Global Customer Operations
In Kind
Sep 15, 2025
$11,960.10
137
$87.30
24,304
Blumenstock Gerald M
EVP, Research, Dev. & Eng.
In Kind
Jun 16, 2025
$34,893.76
506
$68.96
21,695
Redinbo Greg
EVP MARKETING AND APPLICATIONS
In Kind
Jun 16, 2025
$50,616.64
734
$68.96
32,869
KURTZWEIL JOHN T
Sell
May 20, 2025
$104,166.26
1,682
$61.93
35,050
Low Russell
PRESIDENT AND CEO
In Kind
May 17, 2025
$58,723.47
947
$62.01
136,155
Redinbo Greg
EVP MARKETING AND APPLICATIONS
In Kind
May 16, 2025
$11,700.20
190
$61.58
33,603
Low Russell
PRESIDENT AND CEO
In Kind
May 16, 2025
$43,844.96
712
$61.58
137,142
Tatnall Christopher
EVP Global Customer Operations
In Kind
Apr 21, 2025
$41,023.61
907
$45.23
12,660
FALLON LYNNETTE C
EXECUTIVE VP, HR/LEGAL
In Kind
Jan 03, 2025
$221,852.68
3,083
$71.96
27,323
COOGAN JAMES GORDON
EVP AND CFO
In Kind
Oct 16, 2024
$41,416.45
433
$95.65
1,140