Axcelis Technologies, Inc.
MX ˙ BMV ˙ US0545402085
SecurityMX:ACLS / Axcelis Technologies, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,575,504 shares
Ownership 4.70%
Dimensional Fund Advisors Lp ownership in ACLS / Axcelis Technologies, Inc.

2022-02-08 - Dimensional Fund Advisors Lp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,575,504 shares of Axcelis Technologies, Inc. (MX:ACLS). This represents 4.7 percent ownership of the company. In their previous filing dated 2021-02-12 , Dimensional Fund Advisors Lp had reported owning 1,719,362 shares, indicating a decrease of -8.37 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2022-02-08 2022-02-08 13G/A 1,719,362 1,575,504 -8.37 4.70 -7.84
2021-02-12 2021-02-12 13G/A 2,350,858 1,719,362 -26.86 5.10 -29.66
2020-02-12 2020-02-12 13G/A 2,285,935 2,350,858 2.84 7.25 2.84
2019-02-08 2019-02-08 13G/A 1,829,605 2,285,935 24.94 7.05 21.13
2018-02-09 2018-02-09 13G/A 1,602,993 1,829,605 14.14 5.82 6.59
2017-02-09 2017-02-09 13G 1,602,993 5.46

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 844,097 3,057 0.36 78,565 16.27 0.0163
2026-02-12 2025-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 841,040 71,428 9.28 67,570 -10.08 0.0142
2025-11-12 2025-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 769,612 34,153 4.64 75,143 46.61 0.0161
2025-08-12 2025-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 735,459 34,184 4.87 51,255 47.15 0.0119
2025-05-13 2025-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 701,275 -23,310 -3.22 34,831 -31.20 0.0087
2025-02-13 2024-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 724,585 71,631 10.97 50,628 -26.05 0.0122
2024-11-07 2024-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 652,954 -5,158 -0.78 68,466 -26.83 0.0166
2024-08-09 2024-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 658,112 -18,533 -2.74 93,575 24.01 0.0244
2024-05-10 2024-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 676,645 -14,672 -2.12 75,459 -15.84 0.0204
2024-02-07 2023-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 691,317 -249,316 -26.51 89,661 -41.54 0.0262
2023-11-09 2023-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 940,633 -446 -0.05 153,371 -11.10 0.0503
2023-08-09 2023-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 941,079 -86,528 -8.42 172,524 26.00 0.0550
2023-05-12 2023-03-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,027,607 -357,985 -25.84 136,930 125,522.94 0.0461
2023-02-09 2022-12-31 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,385,592 -18,171 -1.29 110 -99.87 0.0325
2022-11-10 2022-09-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,403,763 -83,155 -5.59 85,016 4.26 0.0326
2022-08-12 2022-06-30 13F AXCELIS TECHNOLOGIES COM NEW 054540208 1,486,918 -70,428 -4.52 81,541 -30.68 0.0292
2022-05-13 2022-03-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,557,346 -18,158 -1.15 117,629 0.14 0.0362
2022-02-09 2021-12-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,575,504 -33,605 -2.09 117,467 55.22 0.0355
2021-11-12 2021-09-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,609,109 6,176 0.39 75,676 16.80 0.0244
2021-08-12 2021-06-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,602,933 -37,285 -2.27 64,791 -3.86 0.0205
2021-05-14 2021-03-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,640,218 -79,144 -4.60 67,391 34.60 0.0223
2021-03-08 2020-12-31 13F/A-2 AXCELIS TECHNOLOGIES COM 054540208 1,719,362 -65,526 -3.67 50,068 27.50 0.0181
2021-02-11 2020-12-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,719,362 -65,526 50,068 18,081.9003
2020-11-12 2020-09-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,784,888 -157,443 -8.11 39,268 -27.40 0.0167
2020-08-13 2020-06-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,942,331 -182,357 -8.58 54,091 39.04 0.0238
2020-05-14 2020-03-31 13F AXCELIS TECHNOLOGIES COM 054540208 2,124,688 -226,170 -9.62 38,902 -31.32 0.0203
2020-02-14 2019-12-31 13F AXCELIS TECHNOLOGIES COM 054540208 2,350,858 -39,041 -1.63 56,644 38.69 0.0206
2019-11-12 2019-09-30 13F AXCELIS TECHNOLOGIES COM 054540208 2,389,899 402 0.02 40,843 13.57 0.0159
2019-08-13 2019-06-30 13F AXCELIS TECHNOLOGIES COM 054540208 2,389,497 7,427 0.31 35,962 -24.97 0.0140
2019-08-12 2019-03-31 13F/A-2 AXCELIS TECHNOLOGIES COM 054540208 2,382,070 96,135 4.21 47,927 17.79 0.0191
2019-05-10 2019-03-31 13F AXCELIS TECHNOLOGIES COM 054540208 2,382,070 96,135 47,927
2019-02-26 2018-12-31 13F/A-1 AXCELIS TECHNOLOGIES COM 054540208 2,285,935 208,263 10.02 40,690 -0.33 0.0184
2019-02-13 2018-12-31 13F AXCELIS TECHNOLOGIES COM 054540208 2,285,935 208,263 40,690
2018-11-13 2018-09-30 13F AXCELIS TECHNOLOGIES COM 054540208 2,077,672 122,068 6.24 40,826 5.44 0.0155
2018-08-10 2018-06-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,955,604 105,108 5.68 38,721 -14.94 0.0154
2018-05-11 2018-03-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,850,496 20,891 1.14 45,522 -13.31 0.0190
2018-02-12 2017-12-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,829,605 -5,946 -0.32 52,512 4.60 0.0218
2017-11-13 2017-09-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,835,551 25,567 1.41 50,201 32.39 0.0219
2017-08-11 2017-06-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,809,984 43,975 2.49 37,920 14.22 0.0175
2017-05-12 2017-03-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,766,009 163,016 10.17 33,200 42.35 0.0159
2017-02-09 2016-12-31 13F AXCELIS TECHNOLOGIES COM 054540208 1,602,993 82,443 5.42 23,323 15.50 0.0116
2016-11-10 2016-09-30 13F AXCELIS TECHNOLOGIES COM 054540208 1,520,550 10,282 0.68 20,193 397.12 0.0109
2016-08-09 2016-06-30 13F AXCELIS TECHNOLOGIES COM 054540109 1,510,268 -4,215,831 -73.62 4,062 -74.66 0.0023
2016-05-13 2016-03-31 13F AXCELIS TECHNOLOGIES COM 054540109 5,726,099 255,371 4.67 16,033 13.16 0.0096
2016-02-10 2015-12-31 13F AXCELIS TECHNOLOGIES COM 054540109 5,470,728 443,943 8.83 14,169 5.57 0.0088
2015-11-13 2015-09-30 13F AXCELIS TECHNOLOGIES COM 054540109 5,026,785 365,347 7.84 13,422 -2.73 0.0088
2015-08-14 2015-06-30 13F AXCELIS TECHNOLOGIES COM 054540109 4,661,438 261,172 5.94 13,798 31.75 0.0084
2015-05-14 2015-03-31 13F AXCELIS TECHNOLOGIES COM 054540109 4,400,266 315,237 7.72 10,473 0.14 0.0066
2015-02-06 2014-12-31 13F AXCELIS TECHNOLOGIES COM 054540109 4,085,029 -28,084 -0.68 10,458 27.77 0.0069
2014-11-13 2014-09-30 13F AXCELIS TECHNOLOGIES COM 054540109 4,113,113 -81,710 -1.95 8,185 -2.43 0.0058
2014-08-08 2014-06-30 13F AXCELIS TECHNOLOGIES COM 054540109 4,194,823 -31,267 -0.74 8,389 -7.67 0.0058
2014-05-14 2014-03-31 13F AXCELIS TECHNOLOGIES COM 054540109 4,226,090 -138,917 -3.18 9,086 -14.69 0.0068
2014-02-12 2013-12-31 13F AXCELIS TECHNOLOGIES COM 054540109 4,365,007 545,994 14.30 10,651 32.18 0.0083
2013-11-13 2013-09-30 13F AXCELIS TECHNOLOGIES COM 054540109 3,819,013 95,033 2.55 8,058 18.88 0.0070
2013-08-15 2013-06-30 13F AXCELIS TECHNOLOGIES COM 054540109 3,723,980 3,723,980 6,778 0.0064
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.