Ultralife

ULBI · NASDAQ

$6.29+$0.23 (+3.80%)TodayMarket closed · Oct 20, 7:30 PM ET

Prev close $6.06

Who owns ULBI

Largest institutional holders, from their latest 13F filings

The 10 largest institutions hold 63.0% of ULBI’s shares.

Grace Brothers Management, LLC38.4%
Visionary Wealth Advisors, LLC6.7%
Dimensional Fund Advisors, L.P.5.8%
Janney Montgomery Scott LLC3.4%
Next 6 largest institutions8.8%
All other shareholders37.0%

Top institutional holders of ULBI
Holder	Shares	% of shares	Change, last filing	Filed
Grace Brothers Management, LLC	6.39M	38.38%	+375.06K	Mar 16, 2026
Visionary Wealth Advisors, LLC	1.11M	6.66%	+3.02K	Jun 30, 2026
Dimensional Fund Advisors, L.P.	963.73K	5.78%	−31.11K	Jun 30, 2026
Janney Montgomery Scott LLC	560.35K	3.36%	+42.35K	Jun 30, 2026
Vanguard Capital Management, LLC	464.73K	2.79%	+6.89K	Jun 30, 2026
Truffle Hound Capital, LLC	250.00K	1.50%	+0	Jun 30, 2026
RBF Capital, LLC	218.71K	1.31%	+0	Jun 30, 2026
Whitmore (Bradford T)	205.91K	1.24%	+0	Mar 16, 2026
Renaissance Technologies LLC	171.79K	1.03%	−26.30K	Jun 30, 2026
Connor, Clark & Lunn Investment Management Ltd.	155.04K	0.93%	+22	Jun 30, 2026

Largest mutual fund holders

Top mutual fund holders of ULBI
Holder	Shares	% of shares	Change, last filing	Filed
Vanguard Total Stock Market Index Fund	339.59K	2.04%	+0	Jul 31, 2026
DFA US Small Cap Value Portfolio	202.96K	1.22%	+0	May 31, 2026
DFA U.S. Targeted Value Portfolio	122.06K	0.73%	−6.23K	May 31, 2026
Vanguard Extended Market Index Fund	117.54K	0.71%	+0	Jul 31, 2026
Florida State Board Administration Fund	117.20K	0.70%	−500	Jun 30, 2026

Insider trades

Form 4 filings by officers, directors and large holders

Over the last 6 months, insiders bought $728.25K (4 trades) of ULBI on the open market, with no sales.

Latest ULBI insider transactions
Insider	Date	Type	Shares	Price	Value
WHITMORE BRADFORD T	May 26, 2026	Buy	67.30K	$6.81	$458.58K
WHITMORE BRADFORD T	May 22, 2026	Buy	8.70K	$6.33	$55.07K
WHITMORE BRADFORD T	May 21, 2026	Buy	32.88K	$6.13	$201.67K
Manna Michael Edward	May 18, 2026	Buy	2.00K	$6.47	$12.94K

Short interest

Settled Sep 30, 2026

Shares short: 102.01K
Days to cover: 2.03
% of shares outstanding: 0.61%
Average daily volume: 50.17K
Change since last report: −2.5%

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