Who owns Vicor (VICR)
Which tracked institutional funds hold VICR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See VICR company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on VICR is one-sided between 2026-Q1 and 2026-Q2: 274 added or opened and 59 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
VICR’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes VICR more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in VICR divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 473 tracked filers holding VICR, 324 increased or opened the position and 197 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in VICR between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 68
- VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.$43M
- NATIXIS$10M
- NOMURA ASSET MANAGEMENT INTERNATIONAL INC.$9M
- Massar Capital Management, LP$6M
- KR Capital LP$5M
- Schonfeld Strategic Advisors LLC$5M
Full exits 38
- Qube Research & Technologies Ltd$14M
- ACADIAN ASSET MANAGEMENT LLC$14M
- HRT FINANCIAL LP$14M
- Ariose Capital Management Ltd$12M
- Empowered Funds, LLC$8M
- RENAISSANCE TECHNOLOGIES LLC$8M
Largest adds
- BlackRock, Inc.$657M
- PRICE T ROWE ASSOCIATES INC /MD/$595M
- JPMORGAN CHASE & CO$570M
- VANGUARD PORTFOLIO MANAGEMENT LLC$299M
- VANGUARD CAPITAL MANAGEMENT LLC$259M
- Driehaus Capital Management LLC$158M
Largest trims
- FMR LLC$12M
- MILLENNIUM MANAGEMENT LLC$12M
- JACOBS LEVY EQUITY MANAGEMENT, INC$7M
- HERALD INVESTMENT MANAGEMENT Ltd$6M
- Engineers Gate Manager LP$4M
- EverSource Wealth Advisors, LLC$4M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 2,460,929 | $935M | 12.3% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 2,370,220 | $870M | 11.4% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,368,366 | $899M | 11.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 1,280,146 | $486M | 6.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,120,538 | $426M | 5.6% | 2026-Q2 |
| STATE STREET CORP trimmed | 726,021 | $276M | 3.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 587,338 | $223M | 2.9% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 539,169 | $205M | 2.7% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 530,885 | $202M | 2.7% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 530,811 | $202M | 2.7% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC added | 524,000 | $199M | 2.6% | 2026-Q2 |
| Driehaus Capital Management LLC added | 496,507 | $189M | 2.5% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 493,315 | $187M | 2.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 449,529 | $168M | 2.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 373,757 | $142M | 1.9% | 2026-Q2 |
| Invesco Ltd. added | 245,334 | $93M | 1.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 230,808 | $88M | 1.2% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 192,902 | $73M | 1.0% | 2026-Q2 |
| UBS Group AG added | 156,855 | $60M | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 155,435 | $59M | 0.8% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 154,621 | $59M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 152,771 | $58M | 0.8% | 2026-Q2 |
| COLRAIN CAPITAL LLC trimmed | 150,277 | $57M | 0.8% | 2026-Q2 |
| AWM Investment Company, Inc. trimmed | 148,981 | $57M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 139,978 | $53M | 0.7% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 133,641 | $51M | 0.7% | 2026-Q2 |
| PINNACLE ASSOCIATES LTD trimmed | 130,492 | $50M | 0.7% | 2026-Q2 |
| Nuveen, LLC added | 125,882 | $48M | 0.6% | 2026-Q2 |
| Arosa Capital Management LP trimmed | 125,000 | $47M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 117,886 | $45M | 0.6% | 2026-Q2 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. new | 112,380 | $43M | 0.6% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 101,178 | $38M | 0.5% | 2026-Q2 |
| Andar Capital Management HK Ltd added | 101,100 | $38M | 0.5% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 97,525 | $16M | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 88,249 | $34M | 0.4% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL trimmed | 83,690 | $32M | 0.4% | 2026-Q2 |
| Tidal Investments LLC added | 82,874 | $31M | 0.4% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 79,396 | $30M | 0.4% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 79,194 | $30M | 0.4% | 2026-Q2 |
| HERALD INVESTMENT MANAGEMENT Ltd trimmed | 77,100 | $29M | 0.4% | 2026-Q2 |
| ASHFORD CAPITAL MANAGEMENT INC trimmed | 74,920 | $28M | 0.4% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 72,593 | $27M | 0.4% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 70,523 | $26M | 0.3% | 2026-Q2 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 67,769 | $26M | 0.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 65,696 | $25M | 0.3% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 62,780 | $24M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 62,291 | $24M | 0.3% | 2026-Q2 |
| GF FUND MANAGEMENT CO. LTD. trimmed | 60,972 | $23M | 0.3% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 58,388 | $22M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 51,121 | $19M | 0.3% | 2026-Q2 |
| Alight Capital Management LP added | 50,000 | $19M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 49,285 | $19M | 0.2% | 2026-Q2 |
| Trexquant Investment LP added | 48,149 | $18M | 0.2% | 2026-Q2 |
| Bruce & Co., Inc. trimmed | 48,000 | $18M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 47,232 | $18M | 0.2% | 2026-Q2 |
| CIBC WORLD MARKET INC. trimmed | 44,987 | $17M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 44,930 | $17M | 0.2% | 2026-Q2 |
| CHAPIN DAVIS, INC. | 44,200 | $17M | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 42,655 | $16M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 41,463 | $16M | 0.2% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 39,729 | $15M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 39,267 | $15M | 0.2% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. added | 38,615 | $15M | 0.2% | 2026-Q2 |
| Portolan Capital Management, LLC added | 38,081 | $14M | 0.2% | 2026-Q2 |
| FMR LLC trimmed | 37,254 | $14M | 0.2% | 2026-Q2 |
| GatePass Capital, LLC trimmed | 34,604 | $13M | 0.2% | 2026-Q2 |
| Chicago Capital, LLC added | 33,812 | $13M | 0.2% | 2026-Q2 |
| Legal & General Group Plc trimmed | 30,830 | $12M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO added | 29,498 | $11M | 0.1% | 2026-Q2 |
| Vident Advisory, LLC added | 27,516 | $10M | 0.1% | 2026-Q2 |
| Weiss Asset Management LP trimmed | 27,439 | $10M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 27,326 | $10M | 0.1% | 2026-Q2 |
| NATIXIS added | 27,116 | $10M | 0.1% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 26,003 | $10M | 0.1% | 2026-Q2 |
| IRONWOOD INVESTMENT MANAGEMENT LLC trimmed | 25,507 | $10M | 0.1% | 2026-Q2 |
| ExodusPoint Capital Management, LP added | 25,493 | $10M | 0.1% | 2026-Q2 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. added | 25,000 | $9M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 24,623 | $9M | 0.1% | 2026-Q2 |
| Bouvel Investment Partners, LLC trimmed | 24,525 | $9M | 0.1% | 2026-Q2 |
| Retirement Systems of Alabama added | 24,167 | $9M | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 22,226 | $8M | 0.1% | 2026-Q2 |
| Creative Planning added | 22,138 | $8M | 0.1% | 2026-Q2 |
| RICE HALL JAMES & ASSOCIATES, LLC trimmed | 21,893 | $8M | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 21,505 | $8M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 21,250 | $8M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 19,649 | $7M | 0.1% | 2026-Q2 |
| Bridgewater Associates, LP trimmed | 18,444 | $7M | 0.1% | 2026-Q2 |
| TD Asset Management Inc added | 16,896 | $6M | 0.1% | 2026-Q2 |
| Mariner, LLC trimmed | 16,643 | $6M | 0.1% | 2026-Q2 |
| Man Group plc trimmed | 16,220 | $6M | 0.1% | 2026-Q2 |
| Massar Capital Management, LP new | 15,868 | $6M | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 15,431 | $6M | 0.1% | 2026-Q2 |
| POLEN CAPITAL MANAGEMENT LLC added | 14,924 | $6M | 0.1% | 2026-Q2 |
| Mason & Associates Inc trimmed | 14,699 | $6M | 0.1% | 2026-Q2 |
| EFG International AG trimmed | 14,397 | $5M | 0.1% | 2026-Q2 |
| NISSAY ASSET MANAGEMENT CORP /JAPAN added | 14,237 | $5M | 0.1% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 13,820 | $5M | 0.1% | 2026-Q2 |
| KR Capital LP new | 13,650 | $5M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 13,633 | $5M | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 13,434 | $5M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.