$ACFN

$17.53 +$0.29 (1.68%) Live

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

Ownership

13F as of Q2 2026 · 2.5M shares outstanding

Who owns ACFN?

By type of holder

Institutions 4.4% Insiders 39.8% Everyone else 55.8%

Concentration Top 10 holders own 43.7%

Loeb Jan H 26.4% · Osterer Michael 10.1%

Institutional ownership

4.4%

+1.3 pts vs last qtr

Institutional holders

+2 vs last qtr

Net shares bought

+32.8K

by institutions in Q2 2026

New / sold out

3 / 1

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Citadel Advisors LLC NEW +16.3K
Bridgeway Capital Management, LLC NEW +12.5K

Biggest sellers in Q2 2026

Osaic Holdings, Inc. −1.5K
UBS Group AG SOLD OUT −693

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Acorn Energy Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2022–FY2025

+2.3%

+0.76% a year

Each share's claim on the business

−2.2%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $320K

over 4 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+ years0% 3–5 years0% 1–3 years0% Under 1 year100%

Quarterly turnover

23.9%

of institutional shares changed hands

Top 10 managers, median time held

3 quarters

Super Investors

Investment managers reporting ACFN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
VC Vanguard Capital Management LLC	38.0K	1.51%	+340 (+0.9%)	Q3 '25	0.0%
Shares held by quarter Peak holding38.0K (Q2'26) Change over 8 quarters+38.0K Share of the company1.510% Vanguard Capital Management LLC's full portfolio →
GC Geode Capital Management, LLC	18.2K	0.72%	+259 (+1.4%)	Q3 '25	0.0%
Shares held by quarter Peak holding18.2K (Q2'26) Change over 8 quarters+18.2K Share of the company0.720% Geode Capital Management, LLC's full portfolio →

Vanguard Capital Management LLC

38.0K

% of company

1.51%

Change vs last qtr

+340 (+0.9%)

Held since

Q3 '25

Geode Capital Management, LLC

18.2K

% of company

0.72%

Change vs last qtr

+259 (+1.4%)

Held since

Q3 '25

12 more super investors behind a free account

See every manager holding Acorn Energy Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ACFN on Form N-PORT; together they hold 2.6% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$337K	19.8K	0.79%	0.00%	June 30, 2026
VE Vanguard Extended Market Index Fund Vanguard Index Funds	$310K	18.2K	0.72%	0.00%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$337K

% of company

0.79%

% of the fund

0.00%

As of

June 30, 2026

Vanguard Extended Market Index Fund

Vanguard Index Funds

Position value

$310K

% of company

0.72%

% of the fund

0.00%

As of

June 30, 2026

7 more funds behind a free account

See every fund holding Acorn Energy Inc 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
LJ Loeb Jan H Insider	661.8K	26.37%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company26.370% Loeb Jan H's insider activity →
OM Osterer Michael Insider	253.9K	10.12%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company10.120% Osterer Michael's insider activity →

Loeb Jan H

Insider

661.8K

% of company

26.37%

Change vs last qtr

—

Held since

—

Osterer Michael

Insider

253.9K

% of company

10.12%

Change vs last qtr

—

Held since

—

3 more holders behind a free account

See every insider and 5%+ holder of Acorn Energy Inc.

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