Ultralife (ULBI) director Bradford Whitmore reports December stock buys

Rhea-AI Filing Summary

Ultralife Corp director and 10% owner Bradford T. Whitmore reported purchases of the company’s common stock in mid-December 2025.

He bought 9,530 shares on December 12, 2025 at a weighted average price of $5.6257, 14,882 shares on December 15, 2025 at $5.6621, and 28,588 shares on December 16, 2025 at $5.7026, all through Whitmore Holdings, LLC.

Following these transactions, he beneficially owned 1,235,631 Ultralife shares through Whitmore Holdings, 4,452,283 shares through Sunray I, LLC, 518,616 shares through Grace Brothers, LP, and directly held 205,915 shares of common stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

WHITMORE BRADFORD T

(Last) (First) (Middle)

5215 OLD ORCHARD ROAD

SUITE 970

(Street)

SKOKIE IL 60077

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ULTRALIFE CORP [ ULBI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/12/2025		P		9,530	A	$5.6257(1)	1,192,161	I(2)	By Whitmore Holdings, LLC
Common Stock	12/15/2025		P		14,882	A	$5.6621(3)	1,207,043	I(2)	By Whitmore Holdings, LLC
Common Stock	12/16/2025		P		28,588	A	$5.7026(4)	1,235,631	I(2)	By Whitmore Holdings, LLC
Common Stock								205,915	D
Common Stock								4,452,283	I(5)	By Sunray I, LLC
Common Stock								518,616	I(6)	By Grace Brothers, LP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.563 to $5.6868. The reporting person undertakes to provide, upon request by the staff of the SEC, the issuer, or a security holder of the issuer, full information regarding the number of shares transacted at each price, with respect to all transactions reported on this Form 4.

2. As manager of Whitmore Holdings, LLC (and trustee of Bradford Whitmore Trust, the sole member of Whitmore Holdings, LLC), Bradford T. Whitmore is the indirect beneficial owner of these shares.

3. The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.56 to $5.7598. The reporting person undertakes to provide, upon request by the staff of the SEC, the issuer, or a security holder of the issuer, full information regarding the number of shares transacted at each price, with respect to all transactions reported on this Form 4.

4. The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.6513 to $5.838. The reporting person undertakes to provide, upon request by the staff of the SEC, the issuer, or a security holder of the issuer, full information regarding the number of shares transacted at each price, with respect to all transactions reported on this Form 4.

5. As manager of Sunray I, LLC, Bradford T. Whitmore is an indirect beneficial owner of 4,452,283 shares of Common Stock.

6. As manager of Whitmore Holdings, LLC, which is the sole General Partner of Grace Brothers, LP, Bradford T. Whitmore is an indirect beneficial owner of 518,616 shares of Common Stock.

	Bradford T. Whitmore	12/16/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider activity did Ultralife (ULBI) report for Bradford T. Whitmore?

Bradford T. Whitmore, a director and 10% owner of Ultralife, reported multiple purchases of Ultralife common stock in December 2025, all coded as open-market or private purchase transactions (code P).

How many Ultralife (ULBI) shares did Bradford T. Whitmore buy in December 2025?

He reported buying 9,530 shares on December 12, 14,882 shares on December 15, and 28,588 shares on December 16, 2025, through Whitmore Holdings, LLC.

What prices did Bradford T. Whitmore pay for ULBI common stock?

The reported weighted average prices were $5.6257 on December 12, $5.6621 on December 15, and $5.7026 on December 16, 2025. Each price reflects multiple trades, with ranges of $5.563–$5.6868, $5.56–$5.7598, and $5.6513–$5.838, respectively.

How many Ultralife (ULBI) shares does Bradford T. Whitmore beneficially own after these transactions?

After the reported trades, he indirectly beneficially owned 1,235,631 shares through Whitmore Holdings, LLC, 4,452,283 shares through Sunray I, LLC, 518,616 shares through Grace Brothers, LP, and directly held 205,915 shares of Ultralife common stock.

In what roles is Bradford T. Whitmore connected to Ultralife (ULBI) and the holding entities?

He is a director and 10% owner of Ultralife. He is manager of Whitmore Holdings, LLC and trustee of the Bradford Whitmore Trust (its sole member), manager of Sunray I, LLC, and manager of Whitmore Holdings, LLC, which is the sole general partner of Grace Brothers, LP.

What do the weighted average price footnotes in the Ultralife (ULBI) Form 4 mean?

The footnotes state that each reported price is a weighted average for multiple trades within a stated price range. Whitmore undertakes to provide the exact number of shares traded at each price to the SEC staff, the issuer, or any security holder upon request.