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VICR · Vicor Corp · Shareholders & Ownership

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$209.60 +5.46 (+2.67%)
Market Cap
$9.53B
Shares
46.11M
Volume · Oct 21 620.52K Avg daily vol (3M) 955.52K

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
1
VINCIARELLI PATRIZIO
Insider CIK 901484 · Oct 2, 2026
Director, Chairman and CEO, 10% Owner, issuer-wide, not summed
8,474,515
1.1
Patrizio Vinciarelli
13G CIK 901484 · Unknown · Dec 31, 2024
Rule 13d-1(d), exempt investor
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
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
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
UBS Group AG
13F CIK 1610520 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
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
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
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
EICHTEN ESTIA J
Insider CIK 1111769 · Jul 24, 2026
Director, issuer-wide, not summed
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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Key facts CIK 751978 CUSIP 925815102 13F (30d) 66 filings 66 filers Visit website Investor relations