Axcelis Technologies, Inc.
US ˙ NasdaqGS ˙ US0545402085

SecurityACLS / Axcelis Technologies, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Engineers Gate Manager LP closes position in ACLS / Axcelis Technologies, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 0 shares of Axcelis Technologies, Inc. (US:ACLS) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 11,167 shares of Axcelis Technologies, Inc.. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -100.00 0
2026-02-17 2025-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 11,167 7,596 212.71 897 157.76 0.0106
2025-11-14 2025-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 3,571 3,571 349 0.0040
2025-08-14 2025-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -58,784 -100.00 0 -100.00
2025-05-15 2025-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 58,784 -67,387 -53.41 2,920 -66.89 0.0492
2025-02-14 2024-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 126,171 109,154 641.44 8,816 394.11 0.1534
2024-11-14 2024-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 17,017 -1,955 -10.30 1,784 -33.85 0.0348
2024-08-14 2024-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 18,972 -56,815 -74.97 2,698 -68.09 0.0608
2024-05-15 2024-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 75,787 -6,785 -8.22 8,452 -21.08 0.2225
2024-02-14 2023-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 82,572 61,998 301.34 10,709 219.26 0.3057
2023-11-14 2023-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 20,574 16,822 448.35 3,355 388.21 0.1240
2023-08-14 2023-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 3,752 -8,779 -70.06 688 -58.84 0.0260
2023-05-15 2023-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 12,531 12,531 1,670 0.0698
2022-08-15 2022-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -2,843 -100.00 0 -100.00
2022-05-16 2022-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 2,843 2,843 215 0.0084
2022-02-14 2021-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -8,077 -100.00 0 -100.00
2021-11-15 2021-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 8,077 8,077 380 0.0217
2021-02-16 2020-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -61,323 -100.00 0 -100.00
2020-11-16 2020-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 61,323 -22,415 -26.77 1,349 -42.15 0.0633
2020-08-17 2020-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 83,738 68,180 438.23 2,332 718.25 0.1187
2020-05-15 2020-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 15,558 15,558 285 0.0205
2019-11-14 2019-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -28,103 -100.00 0 -100.00
2019-08-14 2019-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 28,103 6,009 27.20 423 -4.94 0.0234
2019-05-15 2019-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 22,094 -9,456 -29.97 445 -20.82 0.0269
2019-02-14 2018-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 31,550 -7,453 -19.11 562 -26.63 0.0450
2018-11-01 2018-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 39,003 -12,589 -24.40 766 -25.05 0.0588
2018-08-03 2018-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 51,592 51,592 1,022 0.0797
2018-05-07 2018-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -62,781 -100.00 0 -100.00
2018-02-01 2017-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 62,781 45,313 259.41 1,802 276.99 0.1237
2017-11-13 2017-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 17,468 -52,895 -75.17 478 -67.57 0.0402
2017-08-10 2017-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 70,363 70,363 1,474 0.1328
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.