Axcelis Technologies, Inc.
US ˙ NasdaqGS ˙ US0545402085

SecurityACLS / Axcelis Technologies, Inc.
InstitutionKBC Group NV
Latest Disclosed Ownership1,069 shares
Latest Disclosed Value $ 100
KBC Group NV ownership in ACLS / Axcelis Technologies, Inc.

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 1,069 shares of Axcelis Technologies, Inc. (US:ACLS) valued at $99,503 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 1,069 shares of Axcelis Technologies, Inc.. The current value of the position is $170,174 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)
2026-05-07 2026-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,069 0 0.00 0 0.0001
2026-01-26 2025-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,069 0 0.00 0 0.0002
2026-01-20 2025-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,069 0 0.00 0 0.0002
2025-08-08 2025-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,069 -486 -31.25 0 0.0002
2025-04-25 2025-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,555 184 13.42 0 0.0002
2025-01-22 2024-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,371 437 46.79 0 0.0003
2024-11-06 2024-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 934 217 30.26 0 0.0003
2024-07-17 2024-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 717 0 0.00 0 0.0003
2024-05-08 2024-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 717 0 0.00 0 0.0003
2024-02-13 2023-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 717 0 0.00 0 0.0003
2024-02-15 2023-09-30 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 717 -1,801 -71.53 0 0.0005
2023-11-22 2023-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 2,518 0 0 0.0019
2024-02-15 2023-06-30 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 2,518 -202 -7.43 0 0.0019
2023-07-28 2023-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 2,518 -202 0 0.0019
2024-02-14 2023-03-31 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 2,720 -122 -4.29 0 0.0015
2023-05-04 2023-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 2,720 -122 0 0.0017
2024-02-14 2022-12-31 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 2,842 0 0.00 0 0.0011
2023-02-13 2022-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 2,842 0 0 0.0000
2024-02-15 2022-09-30 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 2,842 -307 -9.75 0 0.0009
2022-11-08 2022-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 2,842 -307 172 0.0009
2024-02-14 2022-06-30 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 3,149 -2,612 -45.34 0 -100.00 0.0009
2022-07-26 2022-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 3,149 -2,612 173 0.0009
2024-02-14 2022-03-31 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 5,761 2,406 71.71 0 0.0017
2022-05-06 2022-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 5,761 2,406 435 0.0016
2024-02-14 2021-12-31 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 3,355 3,355 0 0.0008
2022-02-03 2021-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 3,355 3,355 250 0.0008
2018-08-03 2018-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 0 -24,270 -100.00 0 -100.00
2018-08-03 2018-03-31 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 24,270 -47,169 -66.03 597 -70.88 0.0055
2018-05-09 2018-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 24,270 -47,169 597
2018-08-03 2017-12-31 13F/A-1 AXCELIS TECHNOLOGIES COM NEW 054540208 71,439 0 0.00 2,050 4.91 0.0175
2018-02-07 2017-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 71,439 0 2,050
2017-11-13 2017-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 71,439 -5,779 -7.48 1,954 20.77 0.0177
2017-08-04 2017-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 77,218 44,775 138.01 1,618 165.25 0.0156
2017-05-10 2017-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 32,443 5,020 18.31 610 52.88 0.0055
2017-02-16 2016-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 27,423 7,830 39.96 399 53.46 0.0040
2016-11-03 2016-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 19,593 -58,779 -75.00 260 23.22 0.0031
2016-08-03 2016-06-30 13F AXCELIS TECHNOLOGIES COM 054540109 78,372 -26,437 -25.22 211 -27.99 0.0030
2016-05-11 2016-03-31 13F AXCELIS TECHNOLOGIES COM 054540109 104,809 -5,265 -4.78 293 2.81 0.0049
2016-02-11 2015-12-31 13F AXCELIS TECHNOLOGIES COM 054540109 110,074 82,396 297.69 285 285.14 0.0053
2015-11-12 2015-09-30 13F AXCELIS TECHNOLOGIES COM 054540109 27,678 0 0.00 74 -9.76 0.0015
2015-12-16 2015-06-30 13F/A-1 AXCELIS TECHNOLOGIES COM 054540109 27,678 0 0.00 82 24.24 0.0011
2015-07-31 2015-06-30 13F AXCELIS TECHNOLOGIES COM 054540109 27,678 82
2015-12-16 2015-03-31 13F/A-1 AXCELIS TECHNOLOGIES COM 054540109 27,678 27,678 66 0.0008
2015-04-30 2015-03-31 13F AXCELIS TECHNOLOGIES COM 054540109 27,678 66
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.