United States Semiconductors & Semiconductor Equipment

Axcelis Technologies Inc (ACLS)

Track

Over the last 90 days, Axcelis Technologies Inc. has seen significant insider selling, with a net value of -$3.89 million. Executives contributed -$2.23 million to this net selling. A total of 36 transactions were recorded, with no insider buys. This activity occurred against a backdrop of strong stock performance, with an 84.8% price increase over 90 days.
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Ticker: ACLS Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Sayiner Necip
1 sale — total 100,000 USD
Sale 3 Jun 2026
Value US$1,780,684.25 | Price 213.23 | Shares 8,996
Proposed sale 3 Jun 2026
Value US$4,770,347.58 | Price 139.70 | Shares 55,349
Sale 2 Jun 2026
Value US$100,000.00 | Price 155.24 | Shares 1,000
Proposed sale 2 Jun 2026
Value US$100,000.00 | Price 155.24 | Shares 1,000
Sale 27 May 2026
Value US$100,000.00 | Price 159.99 | Shares 1,000
Proposed sale 27 May 2026
Value US$100,000.00 | Price 159.99 | Shares 1,000
Sale 22 May 2026
Value US$100,000.00 | Price 155.37 | Shares 1,000
Sale 22 May 2026
Value US$100,000.00 | Price 155.51 | Shares 1,000
Proposed sale 22 May 2026
Value US$100,000.00 | Price 155.37 | Shares 1,000
Proposed sale 22 May 2026
Value US$100,000.00 | Price 155.51 | Shares 1,000
Sale 21 May 2026
Value US$100,000.00 | Price 152.70 | Shares 1,000
Proposed sale 21 May 2026
Value US$177,284.70 | Price 152.70 | Shares 1,161
Sale 20 May 2026
Value US$174,608.50 | Price 149.75 | Shares 1,166
Proposed sale 20 May 2026
Value US$174,608.50 | Price 149.75 | Shares 1,166
Sale 19 May 2026
Value US$85,508.76 | Price 142.51 | Shares 600
Sale 19 May 2026
Value US$371,188.39 | Price 141.41 | Shares 2,625
Sale 19 May 2026
Value US$250,853.58 | Price 140.22 | Shares 1,789
Sale 19 May 2026
Value US$485,770.95 | Price 138.79 | Shares 3,500
Proposed sale 19 May 2026
Value US$456,697.15 | Price 141.61 | Shares 3,225
Proposed sale 19 May 2026
Value US$250,853.58 | Price 140.22 | Shares 1,789
Proposed sale 19 May 2026
Value US$485,770.95 | Price 138.79 | Shares 3,500
Sale 14 May 2026
Value US$421,864.70 | Price 163.89 | Shares 2,574
Sale 14 May 2026
Value US$164,749.72 | Price 162.32 | Shares 1,015
Proposed sale 14 May 2026
Value US$421,748.87 | Price 163.85 | Shares 2,574
Proposed sale 14 May 2026
Value US$164,749.73 | Price 162.32 | Shares 1,015
Sale 13 May 2026
Value US$328,280.00 | Price 164.14 | Shares 2,000
Sale 13 May 2026
Value US$463,730.55 | Price 160.85 | Shares 2,883
Proposed sale 13 May 2026
Value US$328,280.00 | Price 164.14 | Shares 2,000
Proposed sale 13 May 2026
Value US$463,730.55 | Price 160.85 | Shares 2,883
Sale 12 May 2026
Value US$363,538.00 | Price 161.00 | Shares 2,258
Proposed sale 12 May 2026
Value US$363,538.00 | Price 161.00 | Shares 2,258
Planned sale 6 May 2026
Value US$1,170,609.00 | Price 156.75 | Shares 7,468
Proposed sale 6 May 2026
Value US$1,043,279.60 | Price 139.70 | Shares 7,468
Planned sale 1 May 2026
Value US$172,741.84 | Price 138.86 | Shares 1,244
Proposed sale 1 May 2026
Value US$173,052.84 | Price 139.11 | Shares 1,244
Planned sale 1 Apr 2026
Value US$117,010.64 | Price 94.06 | Shares 1,244
Proposed sale 1 Apr 2026
Value US$115,791.52 | Price 93.08 | Shares 1,244
Planned sale 24 Mar 2026
Value US$111,960.00 | Price 90.00 | Shares 1,244
Proposed sale 24 Mar 2026
Value US$106,697.88 | Price 85.77 | Shares 1,244
Sale 20 Feb 2026
Value US$80,000.00 | Price 80.00 | Shares 1,000
Proposed sale 20 Feb 2026
Value US$80,000.00 | Price 80.00 | Shares 1,000
Sale 17 Dec 2025
Value US$172,100.00 | Price 86.05 | Shares 2,000
Proposed sale 17 Dec 2025
Value US$172,100.00 | Price 86.05 | Shares 2,000
Sale 11 Dec 2025
Value US$271,421.64 | Price 89.46 | Shares 3,034
Proposed sale 11 Dec 2025
Value US$271,414.66 | Price 89.46 | Shares 3,034
Sale 20 May 2025
Value US$104,166.26 | Price 61.93 | Shares 1,682
Proposed sale 20 May 2025
Value US$104,158.52 | Price 61.93 | Shares 1,682
Proposed sale 29 Aug 2024
Value US$812,928.21 | Price 112.07 | Shares 7,254
Proposed sale 6 Aug 2024
Value US$669,338.28 | Price 109.98 | Shares 6,086
Sale 6 Aug 2024
Value US$669,338.28 | Price 109.98 | Shares 6,086
Proposed sale 30 May 2024
Value US$358,224.79 | Price 113.47 | Shares 3,157
Proposed sale 20 May 2024
Value US$137,308.32 | Price 114.42 | Shares 1,200
Sale 20 May 2024
Value US$137,304.00 | Price 114.42 | Shares 1,200
Sale 20 May 2024
Value US$137,304.00 | Price 114.42 | Shares 1,200
Buy 11 Mar 2024
Value US$49,451.60 | Price 112.39 | Shares 440
Proposed sale 7 Mar 2024
Value US$340,977.76 | Price 118.97 | Shares 2,866
Proposed sale 1 Mar 2024
Value US$270,856.69 | Price 117.10 | Shares 2,313
Buy 29 Feb 2024
Value US$11,223.00 | Price 112.23 | Shares 100
Buy 23 Feb 2024
Value US$55,520.00 | Price 111.04 | Shares 500
Proposed sale 23 Feb 2024
Value US$501,149.85 | Price 111.12 | Shares 4,510
Sale 14 Dec 2023
Value US$70,250.00 | Price 140.50 | Shares 500
Sale 10 Nov 2023
Value US$65,215.00 | Price 130.43 | Shares 500
Proposed sale 6 Nov 2023
Value US$372,427.50 | Price 129.54 | Shares 2,875
Proposed sale 14 Sep 2023
Value US$108,105.00 | Price 180.18 | Shares 600
Sale 14 Sep 2023
Value US$108,108.00 | Price 180.18 | Shares 600
Proposed sale 7 Sep 2023
Value US$561,738.03 | Price 181.32 | Shares 3,098
Proposed sale 7 Sep 2023
Value US$1,220,534.58 | Price 177.38 | Shares 6,881
Proposed sale 7 Sep 2023
Value US$610,349.31 | Price 179.25 | Shares 3,405
Sale 7 Sep 2023
Value US$561,729.36 | Price 181.32 | Shares 3,098
Sale 7 Sep 2023
Value US$610,346.25 | Price 179.25 | Shares 3,405
Sale 7 Sep 2023
Value US$1,220,551.78 | Price 177.38 | Shares 6,881
Proposed sale 7 Aug 2023
Value US$505,252.50 | Price 175.74 | Shares 2,875
Proposed sale 7 Aug 2023
Value US$66,543.75 | Price 177.45 | Shares 375
Sale 7 Aug 2023
Value US$66,543.75 | Price 177.45 | Shares 375
Sale 12 Jun 2023
Value US$90,875.00 | Price 181.75 | Shares 500
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-04 2026-06-03 S Sale
2.4
Sayiner Necip
Non-Executive Director
8,996 +3.0%
213.23
US$1,780,684 		8,996 +3.0% 213.23 US$1,780,684
2026-06-03 2026-06-03 PrS Proposed sale
2.4
NECIP SAYINER

Director

Non-Executive Director
55,349
139.70
US$4,770,348 		55,349 139.70 US$4,770,348
2026-06-03 2026-06-02 S Sale
Mahoney Robert John

EVP Global Operations

Officer
99,270 -16.6%
192.89
US$2,295,785 		99,270 -16.6% 192.89 US$2,295,785
2026-06-02 2026-06-02 PrS Proposed sale
ROBERT MAHONEY

Officer

Officer
1,000
155.24
US$100,000 		1,000 155.24 US$100,000
2026-05-28 2026-05-27 S Sale
Sutton Todd

VP Corporate Controller

Officer
1,000 -23.9%
159.99
US$100,000 		1,000 -23.9% 159.99 US$100,000
2026-05-27 2026-05-27 PrS Proposed sale
TODD SUTTON

Officer

Officer
1,000
159.99
US$100,000 		1,000 159.99 US$100,000
2026-05-26 2026-05-22 S Sale
2.7
St Dennis Thomas
Non-Executive Director
1,000 -4.8%
155.37
US$100,000 		1,000 -4.8% 155.37 US$100,000
2026-05-22 2026-05-22 S Sale
Evans Eileen

EVP, General Counsel and Sec'y

Officer
1,000 -2.9%
155.51
US$100,000 		1,000 -2.9% 155.51 US$100,000
2026-05-22 2026-05-22 PrS Proposed sale
2.7
THOMAS M. ST. DENNIS

Director

Non-Executive Director
1,000
155.37
US$100,000 		1,000 155.37 US$100,000
2026-05-22 2026-05-22 PrS Proposed sale
EILEEN EVANS

Officer

Officer
1,000
155.51
US$100,000 		1,000 155.51 US$100,000
2026-05-22 2026-05-21 S Sale
1.4
Blumenstock Gerald M

EVP, Research, Dev. & Eng.

Officer
1,000 -5.4%
152.70
US$100,000 		1,000 -5.4% 152.70 US$100,000
2026-05-21 2026-05-21 PrS Proposed sale
1.4
GERALD BLUMENSTOCK

Officer

Officer
1,161
152.70
US$177,285 		1,161 152.70 US$177,285
2026-05-21 2026-05-20 S Sale
Tatnall Christopher

EVP Global Customer Operations

Officer
1,166 -4.0%
149.75
US$174,608 		1,166 -4.0% 149.75 US$174,608
2026-05-20 2026-05-20 PrS Proposed sale
CHRISTOPHER TATNALL

Officer

Officer
1,166
149.75
US$174,608 		1,166 149.75 US$174,608
2026-05-20 2026-05-19 S Sale
3.2
GRAVES GREGORY B
Non-Executive Director
600 -9.9%
142.51
US$85,509 		600 -9.9% 142.51 US$85,509
2026-05-20 2026-05-19 S Sale
3.2
GRAVES GREGORY B
Non-Executive Director
2,625 -30.2%
141.41
US$371,188 		2,625 -30.2% 141.41 US$371,188
2026-05-20 2026-05-19 S Sale
2.6
Quirk Jeanne
Non-Executive Director
1,789 -13.6%
140.22
US$250,854 		1,789 -13.6% 140.22 US$250,854
2026-05-20 2026-05-19 S Sale
2.3
KURTZWEIL JOHN T
Non-Executive Director
3,500 -9.6%
138.79
US$485,771 		3,500 -9.6% 138.79 US$485,771
2026-05-19 2026-05-19 PrS Proposed sale
3.2
GREGORY GRAVES

Director

Non-Executive Director
3,225
141.61
US$456,697 		3,225 141.61 US$456,697
2026-05-19 2026-05-19 PrS Proposed sale
2.6
JEANNE QUIRK

Director

Non-Executive Director
1,789
140.22
US$250,854 		1,789 140.22 US$250,854
2026-05-19 2026-05-19 PrS Proposed sale
2.3
JOHN THOMAS KURTZWEIL

Director

Non-Executive Director
3,500
138.79
US$485,771 		3,500 138.79 US$485,771
2026-05-15 2026-05-14 S Sale
Sutton Todd

VP Corporate Controller

Officer
2,574 -24.8%
163.89
US$421,865 		2,574 -24.8% 163.89 US$421,865
2026-05-15 2026-05-14 S Sale
1.4
Blumenstock Gerald M

EVP, Research, Dev. & Eng.

Officer
1,015 -5.5%
162.32
US$164,750 		1,015 -5.5% 162.32 US$164,750
2026-05-14 2026-05-14 PrS Proposed sale
TODD SUTTON

Officer

Officer
2,574
163.85
US$421,749 		2,574 163.85 US$421,749
2026-05-14 2026-05-14 PrS Proposed sale
1.4
GERALD BLUMENSTOCK

Officer

Officer
1,015
162.32
US$164,750 		1,015 162.32 US$164,750
2026-05-14 2026-05-13 S Sale
3.4
Titinger Jorge
Non-Executive Director
2,000 -30.9%
164.14
US$328,280 		2,000 -30.9% 164.14 US$328,280
2026-05-14 2026-05-13 S Sale
2.0
Redinbo Greg

EVP MARKETING AND APPLICATIONS

Officer
2,883 -8.8%
160.85
US$463,731 		2,883 -8.8% 160.85 US$463,731
2026-05-13 2026-05-13 PrS Proposed sale
3.4
JORGE TITINGER

Director

Non-Executive Director
2,000
164.14
US$328,280 		2,000 164.14 US$328,280
2026-05-13 2026-05-13 PrS Proposed sale
2.0
GREGORY F REDINBO

Officer

Officer
2,883
160.85
US$463,731 		2,883 160.85 US$463,731
2026-05-13 2026-05-12 S Sale
Mahoney Robert John

EVP Global Operations

Officer
2,258 -15.0%
161.00
US$363,538 		2,258 -15.0% 161.00 US$363,538
2026-05-12 2026-05-12 PrS Proposed sale
ROBERT MAHONEY

Officer

Officer
2,258
161.00
US$363,538 		2,258 161.00 US$363,538
2026-05-07 2026-05-06 PlS Planned sale
2.3
Low Russell

PRESIDENT AND CEO

Executive Director
7,468 -5.7%
156.75
US$1,170,609 		7,468 -5.7% 156.75 US$1,170,609
2026-05-06 2026-05-06 PrS Proposed sale
2.3
RUSSELL LOW

Officer

Officer
7,468
139.70
US$1,043,280 		7,468 139.70 US$1,043,280
2026-05-04 2026-05-01 PlS Planned sale
2.3
Low Russell

PRESIDENT AND CEO

Executive Director
1,244 -0.9%
138.86
US$172,742 		1,244 -0.9% 138.86 US$172,742
2026-05-01 2026-05-01 PrS Proposed sale
2.3
RUSSELL LOW

Officer

Officer
1,244
139.11
US$173,053 		1,244 139.11 US$173,053
2026-04-02 2026-04-01 PlS Planned sale
2.3
Low Russell

PRESIDENT AND CEO

Executive Director
1,244 -0.9%
94.06
US$117,011 		1,244 -0.9% 94.06 US$117,011
2026-04-01 2026-04-01 PrS Proposed sale
2.3
RUSSELL LOW

Officer

Officer
1,244
93.08
US$115,792 		1,244 93.08 US$115,792
2026-03-26 2026-03-24 PlS Planned sale
2.3
Low Russell

PRESIDENT AND CEO

Executive Director
1,244 -0.9%
90.00
US$111,960 		1,244 -0.9% 90.00 US$111,960
2026-03-24 2026-03-24 PrS Proposed sale
2.3
RUSSELL LOW

Director; Officer

Executive Director
1,244
85.77
US$106,698 		1,244 85.77 US$106,698
2026-02-23 2026-02-20 S Sale
3.4
Titinger Jorge
Non-Executive Director
1,000 -13.4%
80.00
US$80,000 		1,000 -13.4% 80.00 US$80,000
2026-02-20 2026-02-20 PrS Proposed sale
3.4
JORGE TITINGER

Director

Non-Executive Director
1,000
80.00
US$80,000 		1,000 80.00 US$80,000
2025-12-18 2025-12-17 S Sale
3.4
Titinger Jorge
Non-Executive Director
2,000 -21.1%
86.05
US$172,100 		2,000 -21.1% 86.05 US$172,100
2025-12-17 2025-12-17 PrS Proposed sale
3.4
JORGE TITINGER

Director

Non-Executive Director
2,000
86.05
US$172,100 		2,000 86.05 US$172,100
2025-12-12 2025-12-11 S Sale
1.4
Blumenstock Gerald M

EVP, Research, Dev. & Eng.

Officer
3,034 -14.0%
89.46
US$271,422 		3,034 -14.0% 89.46 US$271,422
2025-12-11 2025-12-11 PrS Proposed sale
1.4
GERALD BLUMENSTOCK

Officer

Officer
3,034
89.46
US$271,415 		3,034 89.46 US$271,415
2025-05-21 2025-05-20 S Sale
2.3
KURTZWEIL JOHN T
Non-Executive Director
1,682 -4.6%
61.93
US$104,166 		1,682 -4.6% 61.93 US$104,166
2025-05-20 2025-05-20 PrS Proposed sale
2.3
JOHN THOMAS KURTZWEIL

Director

Non-Executive Director
1,682
61.93
US$104,159 		1,682 61.93 US$104,159
2024-08-29 2024-08-29 PrS Proposed sale
2.6
DOUGLAS LAWSON

Officer

Officer
7,254
112.07
US$812,928 		7,254 112.07 US$812,928
2024-08-06 2024-08-06 PrS Proposed sale
3.4
JORGE TITINGER

Director

Non-Executive Director
6,086
109.98
US$669,338 		6,086 109.98 US$669,338
2024-08-06 2024-08-06 S Sale
3.4
Titinger Jorge
Non-Executive Director
6,086 -50.8%
109.98
US$669,338 		6,086 -50.8% 109.98 US$669,338
2024-05-30 2024-05-30 PrS Proposed sale
2.6
KEITHLEY JOSEPH P

control person
3,157
113.47
US$358,225 		3,157 113.47 US$358,225
2024-05-20 2024-05-20 PrS Proposed sale
2.3
JOHN THOMAS KURTZWEIL

Director

Non-Executive Director
1,200
114.42
US$137,308 		1,200 114.42 US$137,308
2024-05-20 2024-05-20 S Sale
2.3
KURTZWEIL JOHN T
Non-Executive Director
1,200 -3.5%
114.42
US$137,304 		1,200 -3.5% 114.42 US$137,304
2024-05-20 2024-05-20 S Sale
2.3
KURTZWEIL JOHN T
Non-Executive Director
1,200 -3.5%
114.42
US$137,304 		1,200 -3.5% 114.42 US$137,304
2024-03-11 2024-03-11 B Purchase
2.3
Low Russell

PRESIDENT AND CEO

Executive Director
440 +0.8%
112.39
US$49,452 		440 +0.8% 112.39 US$49,452
2024-03-07 2024-03-07 PrS Proposed sale
2.7
KEVIN J BREWER

Officer

Officer
2,866
118.97
US$340,978 		2,866 118.97 US$340,978
2024-03-01 2024-03-01 PrS Proposed sale
2.7
KEVIN J BREWER

Officer

Officer
2,313
117.10
US$270,857 		2,313 117.10 US$270,857
2024-02-29 2024-02-29 B Purchase
2.7
COOGAN JAMES GORDON

EVP AND CFO

Officer
100 +1.7%
112.23
US$11,223 		100 +1.7% 112.23 US$11,223
2024-02-26 2024-02-23 B Purchase
2.6
Lawson Douglas A.

EVP, CORPORATE MKTG & STRATEGY

Officer
500 +2.6%
111.04
US$55,520 		500 +2.6% 111.04 US$55,520
2024-02-23 2024-02-23 PrS Proposed sale
2.7
KEVIN J BREWER

Officer

Officer
4,510
111.12
US$501,150 		4,510 111.12 US$501,150
2023-12-14 2023-12-14 S Sale
2.6
KEITHLEY JOSEPH P
Non-Executive Director
500 -13.7%
140.50
US$70,250 		500 -13.7% 140.50 US$70,250
2023-11-13 2023-11-10 S Sale
2.6
KEITHLEY JOSEPH P
Non-Executive Director
500 -10.7%
130.43
US$65,215 		500 -10.7% 130.43 US$65,215
2023-11-06 2023-11-06 PrS Proposed sale
2.6
KEITHLEY JOSEPH P

control person
2,875
129.54
US$372,428 		2,875 129.54 US$372,428
2023-09-14 2023-09-14 PrS Proposed sale
2.0
GREGORY F REDINBO

Officer

Officer
600
180.18
US$108,105 		600 180.18 US$108,105
2023-09-14 2023-09-14 S Sale
2.0
Redinbo Greg

EVP Marketing and Applications

Officer
600 -3.4%
180.18
US$108,108 		600 -3.4% 180.18 US$108,108
2023-09-07 2023-09-07 PrS Proposed sale
3.1
LYNNETTE FALLON

Officer

Officer
3,098
181.32
US$561,738 		3,098 181.32 US$561,738
2023-09-07 2023-09-07 PrS Proposed sale
3.4
JORGE TITINGER

Director

Non-Executive Director
6,881
177.38
US$1,220,535 		6,881 177.38 US$1,220,535
2023-09-07 2023-09-07 PrS Proposed sale
2.3
RUSSELL LOW

Officer

Officer
3,405
179.25
US$610,349 		3,405 179.25 US$610,349
2023-09-07 2023-09-07 S Sale
3.1
FALLON LYNNETTE C

Executive VP, HR/Legal

Officer
3,098 -9.0%
181.32
US$561,729 		3,098 -9.0% 181.32 US$561,729
2023-09-07 2023-09-07 S Sale
2.3
Low Russell

President and CEO

Executive Director
3,405 -5.6%
179.25
US$610,346 		3,405 -5.6% 179.25 US$610,346
2023-09-07 2023-09-07 S Sale
3.4
Titinger Jorge
Non-Executive Director
6,881 -40.0%
177.38
US$1,220,552 		6,881 -40.0% 177.38 US$1,220,552
2023-08-07 2023-08-07 PrS Proposed sale
2.6
KEITHLEY JOSEPH P

Control Person
2,875
175.74
US$505,252 		2,875 175.74 US$505,252
2023-08-07 2023-08-07 PrS Proposed sale
2.6
DOUGLAS LAWSON

Officer

Officer
375
177.45
US$66,544 		375 177.45 US$66,544
2023-08-07 2023-08-07 S Sale
2.6
Lawson Douglas A.

EVP, Corporate Mktg & Strategy

Officer
375 -2.0%
177.45
US$66,544 		375 -2.0% 177.45 US$66,544
2023-06-14 2023-06-12 S Sale
2.6
KEITHLEY JOSEPH P
Non-Executive Director
500 -10.7%
181.75
US$90,875 		500 -10.7% 181.75 US$90,875
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