Ultralife Corp (ULBI) director-linked entities add 187K+ shares

Rhea-AI Filing Summary

Ultralife Corp director and 10% owner Bradford T. Whitmore, through Whitmore Holdings, LLC, reported open-market purchases of a total of 187,512 shares of Common Stock over three days. The shares were bought at weighted average prices of $5.9663, $6.3244, and $6.759 per share.

Following these purchases, Whitmore Holdings, LLC held 1,941,759 shares. Separately, the filing shows 205,915 shares held directly and 4,452,283 shares held indirectly through SUNRAY I, LLC, where Whitmore is an indirect beneficial owner.

Insights

Insider trading and governance analyst

Large insider entity increased its Ultralife stake via open-market purchases.

The filing shows Whitmore Holdings, LLC, associated with director and 10% owner Bradford T. Whitmore, buying 187,512 Ultralife common shares in open-market transactions at prices between roughly $5.82 and $7.04 per share. These are discretionary purchases rather than option exercises or tax-related moves.

After these transactions, Whitmore Holdings, LLC held 1,941,759 shares, alongside 205,915 shares held directly and 4,452,283 shares held through SUNRAY I, LLC, where Whitmore is an indirect beneficial owner. This indicates a substantial, actively maintained position, although the economic impact depends on Ultralife’s overall share count and is not quantified here.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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)
03/12/2026

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	03/12/2026		P		33,741	A	$5.9663(1)	1,787,988	I(2)	By Whitmore Holdings, LLC
Common Stock	03/13/2026		P		100,640	A	$6.3244(3)	1,888,628	I(2)	By Whitmore Holdings, LLC
Common Stock	03/16/2026		P		53,131	A	$6.759(4)	1,941,759	I(2)	By Whitmore Holdings, LLC
Common Stock								205,915	D
Common Stock								4,452,283	I(5)	By SUNRAY I, LLC

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 $5.8209 to $6.0799. 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 $6.03 to $6.5635. 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 $6.34 to $7.0405. 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.

	Bradford T. Whitmore	03/16/2026
	** 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

How many Ultralife Corp (ULBI) shares were bought in this Form 4?

The filing reports open-market purchases totaling 187,512 Ultralife Corp common shares. These were acquired across three transactions, with each trade reported at a weighted average price and executed over multiple individual trades within specified price ranges.

At what prices did Whitmore Holdings, LLC buy ULBI shares?

Whitmore Holdings, LLC bought shares at weighted average prices of $5.9663, $6.3244, and $6.759 per share. Each figure reflects multiple individual trades within stated price ranges, as detailed in the accompanying footnotes to the Form 4.

Who executed the ULBI share purchases reported in this Form 4?

The purchases were executed by Whitmore Holdings, LLC, an entity associated with director and 10% owner Bradford T. Whitmore. He is the indirect beneficial owner through Bradford Whitmore Trust, which is the sole member of Whitmore Holdings, LLC, according to the filing’s footnotes.

How many ULBI shares does Whitmore Holdings, LLC own after these transactions?

After the reported purchases, Whitmore Holdings, LLC held 1,941,759 Ultralife common shares. This post-transaction figure reflects the cumulative position of that entity alone and does not include additional shares held directly or through other entities referenced in the filing.

What other Ultralife Corp (ULBI) holdings are associated with Bradford T. Whitmore?

Beyond Whitmore Holdings, LLC, the filing lists 205,915 shares held directly and 4,452,283 shares held indirectly through SUNRAY I, LLC. The footnotes state that Bradford T. Whitmore is an indirect beneficial owner of the SUNRAY I, LLC position.

Were the ULBI insider transactions option exercises or routine withholdings?

No derivative exercises or tax-withholding dispositions are reported. The Form 4 describes the transactions as open-market purchases of common stock, coded as “P,” indicating discretionary buying activity rather than option exercises, gifts, restructurings, or tax-related share withholdings.