Vicor Corporation
US ˙ NasdaqGS ˙ US9258151029

SecurityVICR / Vicor Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership493,670 shares
Latest Disclosed Value $ 79,435,335
Dimensional Fund Advisors Lp reports 11.35% decrease in ownership of VICR / Vicor Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 493,670 shares of Vicor Corporation (US:VICR) valued at $79,480,870 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 556,870 shares of Vicor Corporation. This represents a change in shares of -11.35% during the quarter. The current value of the position is $133,804,317 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 VICOR COM 925815102 493,670 -63,200 -11.35 79,435 30.13 0.0036
2026-02-12 2025-12-31 13F VICOR COM 925815102 556,870 -21,645 -3.74 61,043 112.25 0.0128
2025-11-12 2025-09-30 13F VICOR COM 925815102 578,515 25,393 4.59 28,759 14.61 0.0062
2025-08-12 2025-06-30 13F VICOR COM 925815102 553,122 22,550 4.25 25,094 1.10 0.0058
2025-05-13 2025-03-31 13F VICOR COM 925815102 530,572 492 0.09 24,821 -3.10 0.0062
2025-02-13 2024-12-31 13F VICOR COM 925815102 530,080 -19,295 -3.51 25,615 10.75 0.0062
2024-11-07 2024-09-30 13F VICOR COM 925815102 549,375 6,222 1.15 23,129 28.40 0.0056
2024-08-09 2024-06-30 13F VICOR COM 925815102 543,153 66,775 14.02 18,012 -1.12 0.0047
2024-05-10 2024-03-31 13F VICOR COM 925815102 476,378 7,352 1.57 18,217 -13.58 0.0049
2024-02-07 2023-12-31 13F VICOR COM 925815102 469,026 12,013 2.63 21,079 -21.68 0.0062
2023-11-09 2023-09-30 13F VICOR COM 925815102 457,013 22,035 5.07 26,914 14.58 0.0088
2023-08-09 2023-06-30 13F VICOR COM 925815102 434,978 64,004 17.25 23,489 34.89 0.0075
2023-05-12 2023-03-31 13F VICOR COM 925815102 370,974 6,491 1.78 17,413 91,547.37 0.0059
2023-02-09 2022-12-31 13F VICOR COM 925815102 364,483 20,840 6.06 20 -99.91 0.0058
2022-11-10 2022-09-30 13F VICOR COM 925815102 343,643 15,266 4.65 20,324 13.08 0.0078
2022-08-12 2022-06-30 13F VICOR COM 925815102 328,377 -2,738 -0.83 17,973 -23.06 0.0064
2022-05-13 2022-03-31 13F VICOR COM 925815102 331,115 -7,069 -2.09 23,360 -45.60 0.0072
2022-02-09 2021-12-31 13F VICOR COM 925815102 338,184 4,643 1.39 42,942 -4.04 0.0130
2021-11-12 2021-09-30 13F VICOR COM 925815102 333,541 -5,760 -1.70 44,749 24.73 0.0144
2021-08-12 2021-06-30 13F VICOR COM 925815102 339,301 -22,289 -6.16 35,877 16.51 0.0114
2021-05-14 2021-03-31 13F VICOR COM 925815102 361,590 -111,926 -23.64 30,792 -29.49 0.0102
2021-03-08 2020-12-31 13F/A-2 VICOR COM 925815102 473,516 -72,184 -13.23 43,668 2.95 0.0158
2021-02-11 2020-12-31 13F VICOR COM 925815102 473,516 -72,184 43,668 15,770.5605
2020-11-12 2020-09-30 13F VICOR COM 925815102 545,700 7,884 1.47 42,417 9.62 0.0180
2020-08-13 2020-06-30 13F VICOR COM 925815102 537,816 -2,330 -0.43 38,696 60.86 0.0170
2020-05-14 2020-03-31 13F VICOR COM 925815102 540,146 -144 -0.03 24,056 -4.70 0.0125
2020-02-14 2019-12-31 13F VICOR COM 925815102 540,290 -7,184 -1.31 25,242 56.19 0.0092
2019-11-12 2019-09-30 13F VICOR COM 925815102 547,474 13,812 2.59 16,161 -2.46 0.0063
2019-08-13 2019-06-30 13F VICOR COM 925815102 533,662 27,927 5.52 16,569 5.62 0.0064
2019-08-12 2019-03-31 13F/A-2 VICOR COM 925815102 505,735 10,160 2.05 15,688 -16.23 0.0062
2019-05-10 2019-03-31 13F VICOR COM 925815102 505,735 10,160 15,688
2019-02-26 2018-12-31 13F/A-1 VICOR COM 925815102 495,575 48,853 10.94 18,728 -8.86 0.0085
2019-02-13 2018-12-31 13F VICOR COM 925815102 495,575 48,853 18,728
2018-11-13 2018-09-30 13F VICOR COM 925815102 446,722 14,204 3.28 20,549 9.09 0.0078
2018-08-10 2018-06-30 13F VICOR COM 925815102 432,518 -98,711 -18.58 18,836 24.19 0.0075
2018-05-11 2018-03-31 13F VICOR COM 925815102 531,229 -81,972 -13.37 15,167 18.34 0.0063
2018-02-12 2017-12-31 13F VICOR COM 925815102 613,201 -19,221 -3.04 12,816 -14.13 0.0053
2017-11-13 2017-09-30 13F VICOR COM 925815102 632,422 -600 -0.09 14,925 31.72 0.0065
2017-08-11 2017-06-30 13F VICOR COM 925815102 633,022 -7,393 -1.15 11,331 9.89 0.0052
2017-05-12 2017-03-31 13F VICOR COM 925815102 640,415 -11,879 -1.82 10,311 4.68 0.0049
2017-02-09 2016-12-31 13F VICOR COM 925815102 652,294 -5,216 -0.79 9,850 29.15 0.0049
2016-11-10 2016-09-30 13F VICOR COM 925815102 657,510 -6,278 -0.95 7,627 14.11 0.0041
2016-08-09 2016-06-30 13F VICOR COM 925815102 663,788 -8,557 -1.27 6,684 -5.14 0.0038
2016-05-13 2016-03-31 13F VICOR COM 925815102 672,345 1,153 0.17 7,046 15.11 0.0042
2016-02-10 2015-12-31 13F VICOR COM 925815102 671,192 -3,659 -0.54 6,121 -11.07 0.0038
2015-11-13 2015-09-30 13F VICOR COM 925815102 674,851 6,044 0.90 6,883 -15.57 0.0045
2015-08-14 2015-06-30 13F VICOR COM 925815102 668,807 -10,388 -1.53 8,152 -21.03 0.0050
2015-05-14 2015-03-31 13F VICOR COM 925815102 679,195 0 0.00 10,323 25.61 0.0065
2015-02-06 2014-12-31 13F VICOR COM 925815102 679,195 -11,169 -1.62 8,218 26.65 0.0054
2014-11-13 2014-09-30 13F VICOR COM 925815102 690,364 -3,501 -0.50 6,489 11.61 0.0046
2014-08-08 2014-06-30 13F VICOR COM 925815102 693,865 2,156 0.31 5,814 -17.59 0.0040
2014-05-14 2014-03-31 13F VICOR COM 925815102 691,709 1,617 0.23 7,055 -23.82 0.0053
2014-02-12 2013-12-31 13F VICOR COM 925815102 690,092 801 0.12 9,261 64.26 0.0072
2013-11-13 2013-09-30 13F VICOR COM 925815102 689,291 7,285 1.07 5,638 20.70 0.0049
2013-08-15 2013-06-30 13F VICOR COM 925815102 682,006 682,006 4,671 0.0044
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.