Vicor Corp: which funds bought and sold

Institutions that bought and sold Vicor shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 342 institutions that filed 13F reports for both quarters added to or opened positions in Vicor, and 173 cut or closed them. Together they added a net 968K shares, +4.6% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 971K shares (+23.2%); index fund managers were net sellers of 415K shares (−5.8%). 182 opened a new position and 42 sold out entirely.

Bought, Q2 2026 342 institutions, 182 of them new holders Sold, Q2 2026 173 institutions, 42 of them sold out

Net change, all compared +968K shares (+4.6%)

Net change, active managers +971K shares (+23.2%), 34 bought, 27 sold

Buyers versus sellers

institutions compared, 546

342 bought 31 173 sold

Active managers and hedge funds 34 bought · 27 sold · +971K

Index fund managers 4 bought · 7 sold · −415K

Other institutions 304 bought · 139 sold · +412K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Price T Rowe Associates Inc Active manager	+480K +25.4%	2.4M	$899M
Driehaus Capital Management LLC Active manager	+307K +162.1%	497K	$189M
AQR Capital Management LLC Hedge fund	+301K +203.1%	450K	$168M
Jpmorgan Chase & Co	+263K +12.5%	2.4M	$870M
Jane Street Group, LLC	+211K +64.5%	539K	$205M
T. Rowe Price Investment Management, Inc. Active manager	+134K New position	134K	$50.8M
Invesco Ltd.	+119K +94.0%	245K	$93.2M
Vanguard Portfolio Management LLC Index funds	+118K +10.2%	1.3M	$486M
Acadian Asset Management LLC Active manager	+117K +136.9%	202K	$76.7M
Vaughan Nelson Investment Management, L.P. Active manager	+112K New position	112K	$42.7M
Vanguard Capital Management LLC Index funds	+86K +8.3%	1.1M	$426M
Susquehanna International Group, LLP	+74K +122.5%	134K	$50.8M
Los Angeles Capital Management LLC Active manager	+73K +1153.1%	79K	$30.2M
UBS Group AG	+64K +69.7%	157K	$59.6M
HSBC Holdings PLC	+63K +796.8%	71K	$26.4M
Russell Investments Group, Ltd.	+50K +220.0%	73K	$27.4M
Andar Capital Management Hk Ltd	+46K +83.8%	101K	$38.4M
Trexquant Investment LP Hedge fund	+42K +682.7%	48K	$18.3M
Tidal Investments LLC	+39K +87.8%	83K	$31.5M
HRT Financial LP	+38K +45.6%	122K	$46.4M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Price T Rowe Associates Inc Active manager	+480K +25.4%	2.4M	$899M
Driehaus Capital Management LLC Active manager	+307K +162.1%	497K	$189M
AQR Capital Management LLC Hedge fund	+301K +203.1%	450K	$168M
T. Rowe Price Investment Management, Inc. Active manager	+134K New position	134K	$50.8M
Acadian Asset Management LLC Active manager	+117K +136.9%	202K	$76.7M
Vaughan Nelson Investment Management, L.P. Active manager	+112K New position	112K	$42.7M
Los Angeles Capital Management LLC Active manager	+73K +1153.1%	79K	$30.2M
Trexquant Investment LP Hedge fund	+42K +682.7%	48K	$18.3M
Capital Fund Management S.A. Hedge fund	+23K +146.8%	39K	$14.7M
Algert Global LLC Hedge fund	+23K +100.8%	45K	$17.1M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	−423K −14.7%	2.5M	$935M
Millennium Management LLC Hedge fund	−159K −71.7%	63K	$23.8M
Herald Investment Management Ltd	−143K −65.0%	77K	$29.3M
Awm Investment Company, Inc.	−139K −48.3%	149K	$56.6M
FMR LLC Active manager	−128K −77.5%	37K	$14.1M
Qube Research & Technologies Ltd Hedge fund	−90K Sold out	0	—
State Street Corp Index funds	−86K −10.5%	726K	$276M
Northern Trust Corp Index funds	−80K −29.3%	193K	$73.3M
Jacobs Levy Equity Management, Inc Active manager	−76K −74.6%	26K	$9.9M
Morgan Stanley	−76K −24.8%	231K	$87.7M
Ariose Capital Management Ltd	−73K Sold out	0	—
Manufacturers Life Insurance Company, The	−72K −12.0%	531K	$202M
Gf Fund Management Co. Ltd.	−54K −47.1%	61K	$23.2M
Tudor Investment Corp Et Al Hedge fund	−54K −39.1%	84K	$31.8M
Colrain Capital LLC	−51K −25.5%	150K	$57.1M
Empowered Funds, LLC	−51K Sold out	0	—
Silvercrest Asset Management Group LLC	−48K −41.3%	68K	$25.7M
Renaissance Technologies LLC Hedge fund	−47K Sold out	0	—
Charles Schwab Investment Management Inc Index funds	−39K −20.1%	155K	$59M
Ashford Capital Management Inc	−39K −34.0%	75K	$28.5M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−159K −71.7%	63K	$23.8M
FMR LLC Active manager	−128K −77.5%	37K	$14.1M
Qube Research & Technologies Ltd Hedge fund	−90K Sold out	0	—
Jacobs Levy Equity Management, Inc Active manager	−76K −74.6%	26K	$9.9M
Tudor Investment Corp Et Al Hedge fund	−54K −39.1%	84K	$31.8M
Renaissance Technologies LLC Hedge fund	−47K Sold out	0	—
Citadel Advisors LLC Hedge fund	−33K −71.1%	13K	$5.1M
Engineers Gate Manager LP Hedge fund	−25K −96.1%	994	$377,501
American Century Companies Inc Active manager	−22K −80.8%	5,360	$2M
Man Group PLC Hedge fund	−20K −54.8%	16K	$6.2M

New positions

largest by value

Institution	Shares	Value June 30, 2026
T. Rowe Price Investment Management, Inc.Active manager	134K	$50.8M
Vaughan Nelson Investment Management, L.P.Active manager	112K	$42.7M
Natixis Advisors, LLC	33K	$12.6M
Natixis	27K	$10.3M
Nomura Asset Management International Inc.	25K	$9.4M
Main Management Etf Advisors, LLC	24K	$9M
Massar Capital Management, LP	16K	$6M
Kr Capital LP	14K	$5.2M
Schonfeld Strategic Advisors LLCHedge fund	12K	$4.7M
Sih Partners, LLLP	12K	$4.5M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Qube Research & Technologies LtdHedge fund	90K	$14.4M
Ariose Capital Management Ltd	73K	$11.7M
Empowered Funds, LLC	51K	$8.2M
Renaissance Technologies LLCHedge fund	47K	$7.6M
Jump Financial, LLC	24K	$3.8M
Fora Capital, LLC	21K	$3.3M
Public Sector Pension Investment Board	19K	$3M
Panagora Asset Management IncActive manager	18K	$2.8M
Waratah Capital Advisors Ltd.	17K	$2.8M
Twinbeech Capital LP	17K	$2.7M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 511
Ten largest holders: 57.1%
Index fund managers: 30.9%
Active managers and hedge funds: 23.5%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	34	27	16	7	+971K	+23.2%
Index fund managers	4	7	0	0	−415K	−5.8%
Other institutions	304	139	166	35	+412K	+4.3%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Vicor.

Only managers that filed a holdings report for both quarters are compared (546 here). 13 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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