Vicor Corporation
US ˙ NasdaqGS ˙ US9258151029

SecurityVICR / Vicor Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership17,749 shares
Latest Disclosed Value $ 1,945,339
Sei Investments Co reports 61.13% increase in ownership of VICR / Vicor Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 17,749 shares of Vicor Corporation (US:VICR) valued at $1,945,290 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 11,015 shares of Vicor Corporation. This represents a change in shares of 61.13% during the quarter. The current value of the position is $5,865,690 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)
2026-02-13 2025-12-31 13F VICOR COM 925815102 17,749 6,734 61.13 1,945 255.58 0.0019
2025-11-13 2025-09-30 13F VICOR COM 925815102 11,015 4,428 67.22 548 83.56 0.0006
2025-08-14 2025-06-30 13F VICOR COM 925815102 6,587 -12,215 -64.97 299 -66.10 0.0003
2025-05-14 2025-03-31 13F/A-1 VICOR COM 925815102 18,802 18,802 879 0.0011
2025-05-13 2025-03-31 13F VICOR COM 925815102 13,336 13,336 625 0.0007
2024-08-13 2024-06-30 13F VICOR COM 925815102 0 -9,421 -100.00 0 -100.00
2024-05-07 2024-03-31 13F VICOR COM 925815102 9,421 -2,875 -23.38 360 -34.78 0.0005
2024-02-14 2023-12-31 13F VICOR COM 925815102 12,296 -27,216 -68.88 553 -76.27 0.0009
2023-11-14 2023-09-30 13F VICOR COM 925815102 39,512 14,275 56.56 2,327 70.78 0.0042
2023-08-11 2023-06-30 13F VICOR COM 925815102 25,237 5,879 30.37 1,363 50.00 0.0024
2023-05-12 2023-03-31 13F VICOR COM 925815102 19,358 7,370 61.48 909 40.99 0.0017
2023-02-10 2022-12-31 13F VICOR COM 925815102 11,988 -156 -1.28 644 -10.31 0.0014
2022-11-14 2022-09-30 13F VICOR COM 925815102 12,144 -9,576 -44.09 718 -39.61 0.0016
2022-08-15 2022-06-30 13F VICOR COM 925815102 21,720 3,608 19.92 1,189 -6.75 0.0026
2022-05-13 2022-03-31 13F VICOR COM 925815102 18,112 -22,269 -55.15 1,275 -75.10 0.0026
2022-02-14 2021-12-31 13F VICOR COM 925815102 40,381 1,969 5.13 5,120 -0.33 0.0096
2021-11-12 2021-09-30 13F VICOR COM 925815102 38,412 14,278 59.16 5,137 101.29 0.0108
2021-08-06 2021-06-30 13F VICOR COM 925815102 24,134 -5,930 -19.72 2,552 -1.12 0.0057
2021-05-12 2021-03-31 13F VICOR COM 925815102 30,064 -936 -3.02 2,581 -9.72 0.0065
2021-02-08 2020-12-31 13F VICOR COM 925815102 31,000 -6,646 -17.65 2,859 -2.32 0.0074
2020-12-04 2020-09-30 13F/A-1 VICOR COM 925815102 37,646 -1,179 -3.04 2,927 4.09 0.0085
2020-11-06 2020-09-30 13F VICOR COM 925815102 38,476 -349 2,992 7,204.0708
2020-08-17 2020-06-30 13F/A-1 VICOR COM 925815102 38,825 19,349 99.35 2,812 224.34 0.0087
2020-08-11 2020-06-30 13F VICOR COM 925815102 12,810 -6,666 940 2,549.8000
2020-05-14 2020-03-31 13F VICOR COM 925815102 19,476 19,476 867 0.0032
2019-08-14 2019-06-30 13F VICOR COM 925815102 0 -3,689 -100.00 0 -100.00
2019-05-15 2019-03-31 13F VICOR COM 925815102 3,689 854 30.12 117 4.46 0.0004
2019-02-13 2018-12-31 13F VICOR COM 925815102 2,835 2,835 112 0.0004
2018-11-08 2018-09-30 13F VICOR COM 925815102 0 -18,865 -100.00 0 -100.00
2018-08-03 2018-06-30 13F VICOR COM 925815102 18,865 18,865 821 0.0028
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.