$VICR

$209.55 +$14.78 (7.59%) Live

$VICR Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 46.1M shares outstanding

Who owns VICR?

By type of holder

Institutions 47.3% Insiders 19.1% Everyone else 33.6%

Concentration Top 10 holders own 44.7%

Vinciarelli Patrizio 18.7% · BlackRock, Inc. 5.3%

Institutional ownership

47.3%

+1.7 pts vs last qtr

Institutional holders

511

+140 vs last qtr

Net shares bought

+792.2K

by institutions in Q2 2026

New / sold out

187 / 47

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Price T Rowe Associates Inc /MD/ +479.9K
Driehaus Capital Management LLC +307.0K

Biggest sellers in Q2 2026

BlackRock, Inc. −423.4K
Millennium Management LLC −159.1K

Who is planning to sell?

Notices of proposed sale, last 12 months

$414M

116 notices from 22 people

Shares covered

1.8M

4.01% of the company

Arranged in advance

90%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Patrizio Vinciarelli Director 10b5-1 $346M
Claudio Tuozzolo Officer $11.9M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+17.0%

+1.76% a year

Each share's claim on the business

−14.5%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$35.7M vs —

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years74% 3–5 years1% 1–3 years9% Under 1 year17%

Quarterly turnover

15.5%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting VICR on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	2.5M	5.33%	−423.4K (−14.7%)	≤2021	0.0%
Shares held by quarter Peak holding3.7M (Q3'25) Change over 8 quarters−992.3K Share of the company5.330% BlackRock, Inc.'s full portfolio →
JC Jpmorgan Chase & Co	2.4M	5.14%	+263.5K (+12.5%)	≤2021	0.1%
Shares held by quarter Peak holding4.5M (Q2'25) Change over 8 quarters−905.0K Share of the company5.140% Jpmorgan Chase & Co's full portfolio →

BlackRock, Inc.

2.5M

% of company

5.33%

Change vs last qtr

−423.4K (−14.7%)

Held since

≤2021

Jpmorgan Chase & Co

2.4M

% of company

5.14%

Change vs last qtr

+263.5K (+12.5%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Vicor Corporation, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting VICR on Form N-PORT; together they hold 25.3% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$306M	806.3K	1.75%	0.01%	June 30, 2026
IC iShares Core S&P Mid-Cap ETF iShares Trust	$304M	799.7K	1.73%	0.24%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$306M

% of company

1.75%

% of the fund

0.01%

As of

June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$304M

% of company

1.73%

% of the fund

0.24%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Vicor Corporation and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
VP Vinciarelli Patrizio Insider	8.6M	18.73%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company18.730% Vinciarelli Patrizio's insider activity →
EE Eichten Estia J Insider	104.8K	0.23%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.230% Eichten Estia J's insider activity →

Vinciarelli Patrizio

Insider

8.6M

% of company

18.73%

Change vs last qtr

—

Held since

—

Eichten Estia J

Insider

104.8K

% of company

0.23%

Change vs last qtr

—

Held since

—

7 more holders behind a free account

See every insider and 5%+ holder of Vicor Corporation.

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