Vicor Corporation
US ˙ NasdaqGS ˙ US9258151029

SecurityVICR / Vicor Corporation
InstitutionFmr Llc
Latest Disclosed Ownership165,326 shares
Latest Disclosed Value $ 26,617,512
Fmr Llc reports 21.77% decrease in ownership of VICR / Vicor Corporation

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 165,326 shares of Vicor Corporation (US:VICR) valued at $26,617,486 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 211,340 shares of Vicor Corporation. This represents a change in shares of -21.77% during the quarter. The current value of the position is $54,636,936 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 VICOR COM 925815102 165,326 -46,014 -21.77 26,618 14.92 0.0003
2026-02-17 2025-12-31 13F VICOR COM 925815102 211,340 26,103 14.09 23,163 151.51 0.0012
2025-11-13 2025-09-30 13F VICOR COM 925815102 185,237 36,518 24.56 9,210 36.53 0.0005
2025-08-14 2025-06-30 13F VICOR COM 925815102 148,719 5,208 3.63 6,746 0.48 0.0004
2025-05-12 2025-03-31 13F VICOR COM 925815102 143,511 46,904 48.55 6,713 43.81 0.0004
2025-02-13 2024-12-31 13F VICOR COM 925815102 96,607 9,593 11.02 4,668 27.44 0.0003
2024-11-13 2024-09-30 13F VICOR COM 925815102 87,014 11,931 15.89 3,663 47.17 0.0002
2024-08-13 2024-06-30 13F VICOR COM 925815102 75,083 4,976 7.10 2,490 -7.13 0.0002
2024-05-13 2024-03-31 13F VICOR COM 925815102 70,107 34,121 94.82 2,681 65.74 0.0002
2024-02-13 2023-12-31 13F VICOR COM 925815102 35,986 26,609 283.77 1,617 192.93 0.0001
2023-11-13 2023-09-30 13F VICOR COM 925815102 9,377 8,420 879.83 552 982.35 0.0000
2023-08-11 2023-06-30 13F VICOR COM 925815102 957 -16,474 -94.51 52 -93.77 0.0000
2023-08-11 2023-03-31 13F/A-1 VICOR COM 925815102 17,431 -217 -1.23 818 -13.71 0.0001
2023-05-11 2023-03-31 13F VICOR COM 925815102 17,431 -217 818 0.0000
2023-02-13 2022-12-31 13F VICOR COM 925815102 17,648 -226 -1.26 949 -10.31 0.0001
2022-11-10 2022-09-30 13F VICOR COM 925815102 17,874 17,056 2,085.09 1,057 2,248.89 0.0001
2022-08-12 2022-06-30 13F VICOR COM 925815102 818 -20,262 -96.12 45 -96.98 0.0000
2022-05-13 2022-03-31 13F VICOR COM 925815102 21,080 7,069 50.45 1,488 -16.36 0.0001
2022-02-14 2021-12-31 13F VICOR COM 925815102 14,011 13,899 12,409.82 1,779 11,760.00 0.0001
2022-02-14 2021-09-30 13F/A-1 VICOR COM 925815102 112 97 646.67 15 650.00 0.0000
2021-11-15 2021-09-30 13F VICOR COM 925815102 112 97 15 0.0000
2021-08-13 2021-06-30 13F VICOR COM 925815102 15 -5 -25.00 2 0.00 0.0000
2021-05-14 2021-03-31 13F VICOR COM 925815102 20 3 17.65 2 0.00 0.0000
2021-02-08 2020-12-31 13F VICOR COM 925815102 17 -7 -29.17 2 0.00 0.0000
2020-11-13 2020-09-30 13F VICOR COM 925815102 24 -150,158 -99.98 2 -99.98 0.0000
2020-08-24 2020-06-30 13F/A-1 VICOR COM 925815102 150,182 149,932 59,972.80 10,805 98,127.27 0.0012
2020-08-13 2020-06-30 13F VICOR COM 925815102 150,182 149,932 10,805 265.4472
2020-05-14 2020-03-31 13F VICOR COM 925815102 250 250 11 0.0000
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.