VICR · Vicor Corp · Shareholders & Ownership
Every disclosed holder of VICR in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns VICR
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 22,027,297 | 47.77% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 21,429,335 | 46.48% |
| Remaining | 2,650,100 | 5.75% |
| Registered funds (N-PORT, not summed) | 10,315,735 | 22.37% |
Shares outstanding: 46,106,732, the issuer's latest cover-page count restated onto today's split basis.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of VICR
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
VINCIARELLI PATRIZIO
Insider
CIK 901484 · Oct 2, 2026
Director, Chairman and CEO, 10% Owner, issuer-wide, not summed
|
8,474,515 | ||
| 1.1 |
|
21,051,235 | ||
| 2 |
PRICE T ROWE ASSOCIATES INC /MD/
13G
CIK 80255 · Registered investment adviser · Aug 31, 2026
Rule 13d-1(b), qualified institution, not summed
|
4,384,882 | ||
| 2.1 |
PRICE T ROWE ASSOCIATES INC /MD/
13F
CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,368,366 | ||
| 2.2 |
T. Rowe Price Science & Technology Fund, Inc.
Fund
S000002119 · Registered fund · Jun 30, 2026
T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC., not summed
|
216,900 | ||
| 2.3 |
T. Rowe Price New Horizons Fund, Inc.
Fund
S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
|
201,760 | ||
| 2.4 |
T. Rowe Price Global Stock Fund
Fund
S000001497 · Registered fund · Jul 31, 2026
T. ROWE PRICE INTERNATIONAL FUNDS, INC., not summed
|
175,852 | ||
| 2.5 |
T. Rowe Price Integrated U.S. Small-Cap Growth Equity Fund
Fund
S000002074 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
|
113,500 | ||
| 3 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,460,929 | ||
| 3.1 |
BlackRock, Inc.
13G
CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
2,265,870 | ||
| 3.2 |
iShares Core S&P Mid-Cap ETF
Fund
S000004307 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
799,735 | ||
| 3.3 |
iShares Russell Mid-Cap Growth ETF
Fund
S000004336 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
145,552 | ||
| 3.4 |
iShares S&P Mid-Cap 400 Growth ETF
Fund
S000004308 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
139,912 | ||
| 3.5 |
iShares Russell Mid-Cap ETF
Fund
S000004338 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
101,946 | ||
| 4 |
JPMORGAN CHASE & CO
13G
CIK 19617 · Bank · Aug 31, 2026
Rule 13d-1(b), qualified institution, not summed
|
1,394,339 | ||
| 4.1 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,370,220 | ||
| 5 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,280,146 | ||
| 6 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,120,538 | ||
| 7 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
806,329 | ||
| 8 |
|
726,021 | ||
| 8.1 |
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Fund
S000006986 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
118,285 | ||
| 8.2 |
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Growth ETF
Fund
S000006987 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
36,165 | ||
| 8.3 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
8,276 | ||
| 8.4 |
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund
S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
3,970 | ||
| 8.5 |
State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF
Fund
S000036082 · Registered fund · Jun 30, 2026
SPDR INDEX SHARES FUNDS, not summed
|
1,385 | ||
| 9 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
587,338 | ||
| 10 |
VANGUARD SMALL-CAP INDEX FUND
Fund
S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
582,656 | ||
| 11 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
539,169 | ||
| 12 |
MANUFACTURERS LIFE INSURANCE COMPANY, THE
13F
CIK 928047 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
530,885 | ||
| 12.1 |
Small Cap Core Fund
Fund
S000043450 · Registered fund · Jul 31, 2026
John Hancock Investment Trust, not summed
|
195,751 | ||
| 12.2 |
John Hancock Multifactor Mid Cap ETF
Fund
S000050079 · Registered fund · Jun 30, 2026
John Hancock Exchange-Traded Fund Trust, not summed
|
6,312 | ||
| 12.3 |
John Hancock Multifactor Large Cap ETF
Fund
S000050077 · Registered fund · Jun 30, 2026
John Hancock Exchange-Traded Fund Trust, not summed
|
182 | ||
| 13 |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F
CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
530,811 | ||
| 14 |
NEEDHAM INVESTMENT MANAGEMENT LLC
13F
CIK 1167212 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
524,000 | ||
| 14.1 |
Needham Aggressive Growth Fund
Fund
S000003815 · Registered fund · Jun 30, 2026
Needham Funds Inc, not summed
|
477,000 | ||
| 14.2 |
Needham Growth Fund
Fund
S000003649 · Registered fund · Jun 30, 2026
Needham Funds Inc, not summed
|
27,000 | ||
| 15 |
Driehaus Capital Management LLC
13F
CIK 938206 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
496,507 | ||
| 15.1 |
Driehaus Small Cap Growth Fund
Fund
S000058261 · Registered fund · Jun 30, 2026
Driehaus Mutual Funds, not summed
|
86,060 | ||
| 15.2 |
Driehaus Small/Mid Cap Growth Fund
Fund
S000068519 · Registered fund · Jun 30, 2026
Driehaus Mutual Funds, not summed
|
2,986 | ||
| 16 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
493,315 | ||
| 16.1 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
133,022 | ||
| 16.2 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
93,104 | ||
| 16.3 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
50,037 | ||
| 16.4 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
49,821 | ||
| 16.5 |
U.S. CORE EQUITY 1 PORTFOLIO
Fund
S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
27,067 | ||
| 17 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
449,529 | ||
| 17.1 |
AQR Long-Short Equity Fund
Fund
S000041116 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
22,865 | ||
| 17.2 |
AQR Small Cap Multi-Style Fund
Fund
S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
7,183 | ||
| 17.3 |
AQR Multi-Asset Fund
Fund
S000029959 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
4,655 | ||
| 17.4 |
AQR Small Cap Momentum Style Fund
Fund
S000025644 · Registered fund · Mar 31, 2026
AQR Funds, not summed
|
3,444 | ||
| 17.5 |
AQR Managed Futures Strategy HV Fund
Fund
S000041117 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
3,174 | ||
| 18 |
Capital International Investors
13G
CIK 1562230 · Investment adviser · Dec 29, 2023
Rule 13d-1(b), qualified institution
|
378,100 | ||
| 19 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
373,757 | ||
| 19.1 |
Goldman Sachs U.S. Tax-Managed Equity Fund
Fund
S000009340 · Registered fund · Jun 30, 2026
Goldman Sachs Trust, not summed
|
14,626 | ||
| 19.2 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
5,950 | ||
| 19.3 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
796 | ||
| 19.4 |
Goldman Sachs MarketBeta U.S. 1000 Equity ETF
Fund
S000075322 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust II, not summed
|
765 | ||
| 20 |
VANGUARD SMALL-CAP GROWTH INDEX FUND
Fund
S000002846 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
335,547 | ||
| 21 |
JPMorgan Growth Advantage Fund
Fund
S000004474 · Registered fund · Jun 30, 2026
J.P. Morgan Mutual Fund Investment Trust, not summed
|
269,087 | ||
| 22 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
267,959 | ||
| 23 |
JPMorgan Mid Cap Growth Fund
Fund
S000003654 · Registered fund · Jun 30, 2026
JPMorgan Trust II, not summed
|
255,389 | ||
| 24 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
245,334 | ||
| 24.1 |
Invesco S&P MidCap Quality ETF
Fund
S000013108 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
177,037 | ||
| 24.2 |
Invesco S&P Midcap 400 Pure Growth ETF
Fund
S000060795 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
23,474 | ||
| 24.3 |
Invesco RAFI US 1500 Small-Mid ETF
Fund
S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
11,619 | ||
| 24.4 |
Invesco Dorsey Wright SmallCap Momentum ETF
Fund
S000037586 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
7,793 | ||
| 24.5 |
Invesco Russell 2000 Dynamic Multifactor ETF
Fund
S000064608 · Registered fund · May 31, 2026
Invesco Exchange-Traded Self-Indexed Fund Trust, not summed
|
3,080 | ||
| 25 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
230,808 | ||
| 25.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
40 | ||
| 26 |
ACADIAN ASSET MANAGEMENT LLC
13F
CIK 916542 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
202,077 | ||
| 27 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
192,902 | ||
| 27.1 |
Mid Cap Index Fund
Fund
S000001273 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
15,188 | ||
| 27.2 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
810 | ||
| 28 |
VANGUARD EXPLORER FUND
Fund
S000002578 · Registered fund · Jul 31, 2026
VANGUARD EXPLORER FUND, not summed
|
178,757 | ||
| 29 |
JPMorgan U.S. Tech Leaders ETF
Fund
S000080536 · Registered fund · Jun 30, 2026
J.P. Morgan Exchange-Traded Fund Trust, not summed
|
173,020 | ||
| 30 |
|
156,855 | ||
| 31 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
155,435 | ||
| 31.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
109,292 | ||
| 31.2 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
14,148 | ||
| 31.3 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
13,612 | ||
| 31.4 |
Schwab U.S. Mid-Cap Index Fund
Fund
S000059733 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
4,986 | ||
| 31.5 |
Schwab Small-Cap Equity Fund
Fund
S000005516 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
4,540 | ||
| 32 |
FIRST TRUST ADVISORS LP
13F
CIK 1125816 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
154,621 | ||
| 32.1 |
First Trust NASDAQ Clean Edge Green Energy Index Fund
Fund
S000015169 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund, not summed
|
83,874 | ||
| 32.2 |
First Trust Industrials/Producer Durables AlphaDEX Fund
Fund
S000017701 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
21,881 | ||
| 32.3 |
First Trust Mid Cap Core AlphaDEX Fund
Fund
S000017338 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
13,560 | ||
| 32.4 |
First Trust Mid Cap Growth AlphaDEX Fund
Fund
S000031804 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
12,084 | ||
| 32.5 |
First Trust Multi Cap Growth AlphaDEX Fund
Fund
S000017343 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
3,630 | ||
| 33 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
152,771 | ||
| 34 |
COLRAIN CAPITAL LLC
13F
CIK 1216093 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
150,277 | ||
| 35 |
AWM Investment Company, Inc.
13F
CIK 1535264 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
148,981 | ||
| 36 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
139,978 | ||
| 36.1 |
BNY Mellon US Mid Cap Core Equity ETF
Fund
S000067261 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
|
3,581 | ||
| 37 |
PINNACLE ASSOCIATES LTD
13F
CIK 743127 · Registered investment adviser · Sep 30, 2026
|
137,585 | ||
| 38 |
T. Rowe Price Investment Management, Inc.
13F
CIK 1897612 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
133,857 | ||
| 39 |
SUSQUEHANNA INTERNATIONAL GROUP, LLP
13F
CIK 1446194 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
133,641 | ||
| 40 |
|
125,882 | ||
| 40.1 |
Nuveen Quant Small Cap Equity Fund
Fund
S000005386 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
38,240 | ||
| 40.2 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
19,628 | ||
| 40.3 |
Nuveen Quant Mid Cap Growth Fund
Fund
S000005384 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
17,600 | ||
| 40.4 |
Nuveen Large Cap Growth Index Fund
Fund
S000005387 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
13,521 | ||
| 40.5 |
College Retirement Equities Fund - Total Global Stock Account
Fund
S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
|
5,825 | ||
| 41 |
Arosa Capital Management LP
13F
CIK 1596053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
125,000 | ||
| 42 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
122,166 | ||
| 43 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
118,162 | ||
| 44 |
PRINCIPAL FINANCIAL GROUP INC
13F
CIK 1126328 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
117,886 | ||
| 44.1 |
Principal U.S. Small-Cap ETF
Fund
S000055159 · Registered fund · Jun 30, 2026
Principal Exchange-Traded Funds, not summed
|
64,348 | ||
| 44.2 |
LargeCap Growth Fund I
Fund
S000007077 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
30,754 | ||
| 44.3 |
MidCap S&P 400 Index Fund
Fund
S000007079 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
8,933 | ||
| 44.4 |
LargeCap Growth Account I
Fund
S000007682 · Registered fund · Jun 30, 2026
Principal Variable Contract Funds, Inc, not summed
|
4,078 | ||
| 45 |
VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.
13F
CIK 1021642 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
112,380 | ||
| 46 |
|
104,825 | ||
| 47 |
RHUMBLINE ADVISERS
13F
CIK 1115418 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
101,178 | ||
| 48 |
Andar Capital Management HK Ltd
13F
CIK 1805591 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
101,100 | ||
| 49 |
ALLIANCEBERNSTEIN L.P.
13F
CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
97,525 | ||
| 49.1 |
AB Disruptors ETF
Fund
S000079470 · Registered fund · May 31, 2026
AB Active ETFs, Inc., not summed
|
51,310 | ||
| 49.2 |
Small Cap Core Portfolio
Fund
S000051867 · Registered fund · Jun 30, 2026
Bernstein Fund Inc, not summed
|
12,526 | ||
| 50 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
88,249 |
69 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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