Bradford T. Whitmore - 21 May 2026 Form 4 Insider Report for ULTRALIFE CORP (ULBI)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: ULBI
Reported as of: 21 May 2026
Net transaction value: +$715,314
SEC form: 4
Accepted by SEC: 26 May 2026, 16:18:56 UTC
Prior SEC filing: 16 Mar 2026
Source filing: View source filing
Reporting owner signature: Bradford T. Whitmore

Key filing fact

Bradford T. Whitmore filed Form 4 for ULTRALIFE CORP (ULBI) on 26 May 2026.

Key facts

This page summarizes Bradford T. Whitmore's Form 4 filing for ULTRALIFE CORP (ULBI).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 26 May 2026, 16:18.

Change

Previous filing in this sequence was filed on 16 Mar 2026.
Current net transaction value: +$715,314.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0000933430 Primary reporting owner

WHITMORE BRADFORD T

Relationship: Director, 10%+ Owner
Address: 5215 OLD ORCHARD ROAD, SUITE 970, SKOKIE
Signature: Bradford T. Whitmore
Signature date: 26 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ULBI transaction

Common Stock

Purchase

Transaction value: $201,671
Shares: +32,876
Change %: +1.7%
Price: $6.13
Shares after: 1,974,635
Date: 21 May 2026
Ownership: By Whitmore Holdings, LLC
Footnotes: F1, F2

ULBI transaction

Common Stock

Purchase

Transaction value: $55,067
Shares: +8,700
Change %: +0.44%
Price: $6.33
Shares after: 1,983,335
Date: 22 May 2026
Ownership: By Whitmore Holdings, LLC
Footnotes: F2, F3

ULBI transaction

Common Stock

Purchase

Transaction value: $458,576
Shares: +67,302
Change %: +3.4%
Price: $6.81
Shares after: 2,050,637
Date: 26 May 2026
Ownership: By Whitmore Holdings, LLC
Footnotes: F2, F4

ULBI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 205,915
Date: 21 May 2026
Ownership: Direct

ULBI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,452,283
Date: 21 May 2026
Ownership: By SUNRAY I, LLC
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.97 to $6.359. 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.

Footnote F2

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.

Footnote F3

The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.2953 to $6.3995. 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.

Footnote F4

The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.6399 to $6.9499. 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.

Footnote F5

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