Whitmore entities boost Ultralife (ULBI) ownership stake to 39.6%

Rhea-AI Filing Summary

Ultralife Corp’s largest disclosed shareholder group has increased its stake. Amendment No. 10 to a Schedule 13D reports that Bradford T. Whitmore and affiliated entities now beneficially own 6,599,957 shares of Ultralife common stock, representing 39.6% of the class, based on 16,648,947 shares outstanding as of November 10, 2025.

Whitmore Holdings, LLC purchased a total of 187,512 shares in open-market transactions from March 12 through March 16, 2026, at various prices generally between the mid‑$5 and about $7 per share, using working capital. The filers state they have no present plans for corporate actions such as mergers, asset sales, or control changes but may review their investment and consider future plans over time.

Insights

Equity ownership analyst

Whitmore-affiliated entities quietly lift Ultralife ownership to nearly 40% through open-market buying.

Bradford T. Whitmore and related entities now report beneficial ownership of 6,599,957 Ultralife shares, or 39.6% of the common stock, calculated against 16,648,947 shares outstanding as of November 10, 2025. This reflects a highly concentrated shareholder position.

Whitmore Holdings, LLC acquired 187,512 shares between March 12 and March 16, 2026 in many small open-market trades, at prices ranging roughly from about $5 to just above $7 per share, funded with working capital. Such purchases indicate continued capital deployment into Ultralife by this holder group.

The filers expressly state they currently have no plans or proposals relating to the classic change-of-control or restructuring actions listed in Item 4(a)-(j), while reserving flexibility to reconsider their investment and potential plans later. Future company disclosures would clarify whether this sizable stake translates into governance initiatives or remains a passive but influential holding.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 10)

ULTRALIFE CORP

(Name of Issuer)

Common Stock, $.10 par value per share

(Title of Class of Securities)

(CUSIP Number)

Charlene O'Connor
5215 Old Orchard Rd., Suite 970
Skokie, IL, 60077
847-733-1230

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

03/12/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

WHITMORE BRADFORD T

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 205,915.00
8	Shared Voting Power 6,394,042.00
9	Sole Dispositive Power 205,915.00
10	Shared Dispositive Power 6,394,042.00

11

Aggregate amount beneficially owned by each reporting person

6,599,957.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

39.6 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

Bradford T. Whitmore has shared voting power of 1,941,759 shares as the manager of Whitmore Holdings, LLC, the holder of the shares. Bradford T. Whitmore has shared voting power of 4,452,283 shares as the manager of SUNRAY I, LLC, the holder of the shares. Bradford T. Whitmore has shared dispositive power of 1,941,759 shares as the manager of Whitmore Holdings, LLC, the holder of the shares. Bradford T. Whitmore has shared dispositive power of 4,452,283 shares as the manager of SUNRAY I, LLC, the holder of the shares.

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

SUNRAY I, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 4,452,283.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 4,452,283.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

4,452,283.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

26.7 %

14

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

Whitmore Holdings, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

TENNESSEE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,941,759.00
8	Shared Voting Power 4,452,283.00
9	Sole Dispositive Power 1,941,759.00
10	Shared Dispositive Power 4,452,283.00

11

Aggregate amount beneficially owned by each reporting person

6,394,042.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

38.4 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

Whitmore Holdings, LLC has shared voting power of 4,452,283 shares as the sole member of SUNRAY I, LLC, the holder of the shares. Whitmore Holdings, LLC has shared dispositive power of 4,452,283 shares as the sole member of SUNRAY I, LLC, the holder of the shares.

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

Bradford Whitmore Trust

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

TENNESSEE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 6,394,042.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 6,394,042.00

11

Aggregate amount beneficially owned by each reporting person

6,394,042.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

38.4 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

Bradford Whitmore Trust has shared voting power of 4,452,283 shares as the sole member of Whitmore Holdings, LLC, which is the sole member of SUNRAY I, LLC, the holder of the shares. Bradford Whitmore Trust has shared voting power of 1,941,759 shares as the sole member of Whitmore Holdings, LLC, the holder of the shares. Bradford Whitmore Trust has shared dispositive power of 4,452,283 shares as the sole member of Whitmore Holdings, LLC, which is the sole member of SUNRAY I, LLC, the holder of the shares. Bradford Whitmore Trust has shared dispositive power of 1,941,759 shares as the sole member of Whitmore Holdings, LLC, the holder of the shares.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock, $.10 par value per share
(b)	Name of Issuer: ULTRALIFE CORP
(c)	Address of Issuer's Principal Executive Offices: 2000 TECHNOLOGY PARKWAY, NEWARK, NEW YORK , 14513.
Item 1 Comment: The undersigned hereby amends its Schedule 13D as most recently amended on September 3, 2024 relating to the common stock ("Common Stock") of Ultralife Corporation (the "Issuer"). Bradford T. Whitmore, SUNRAY I, LLC, Whitmore Holdings, LLC and Bradford Whitmore Trust are collectively referred to in this Amendment No. 10 as the "Filers". Unless otherwise indicated, all capitalized terms used herein but not defined herein shall have the same meaning as set forth in the Schedule 13D. Except as set forth herein, the Schedule 13D, as previously amended, remains unchanged.
Item 2.	Identity and Background
(a)	This schedule is filed by Bradford T. Whitmore ("Whitmore"), SUNRAY I, LLC, a Delaware limited liability company ("SLLC"), Whitmore Holdings, LLC, a Tennessee limited liability company("WHLLC"), and Bradford Whitmore Trust, a trust formed under the laws of the State of Tennessee ("Whitmore Trust") and, collectively with Whitmore, SLLC and WHLLC, the "Filers". Whitmore is the sole Trustee of the Bradford Whitmore Trust, and the manager of WHLLC and SLLC. WHLCC is the sole member of SLLC.
(b)	The business address of Whitmore is 5215 Old Orchard Road, Ste 970, Skokie, IL 60077. The business address of SLLC, WHLLC and Whitmore Trust is 5217 Meadowlake Road, Brentwood, TN 37027.
(c)	The principal business of WHLLC is that of being a holding company for various interests. Whitmore's principal occupation is that of being trustee of Whitmore Trust and manager of WHLLC and SLLC. The principal business of SLLC is to hold shares of the Issuer's Common Stock. The principal business of Whitmore Trust is to own WHLLC and other assets.
(d)	None of the persons referred to in this Item 2 has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).
(e)	None of the persons referred to in this Item 2 has, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
(f)	Whitmore is a citizen of the United States. SLLC is a Delaware limited liability company. WHLLC is a Tennessee limited liability company. Whitmore Trust was formed under the laws of the State of Tennessee.
Item 3.	Source and Amount of Funds or Other Consideration
	The Common Stock beneficially owned by the Filers was purchased with working capital.
Item 4.	Purpose of Transaction
	WHLLC purchased a total of 187,512 shares of Common Stock from March 12, 2026 through March 16, 2026. The Filers have no plans or proposals which relate to, or would result in, any of the matters referred to in Paragraphs (a) through (j), inclusive, of Item 4 of the Schedule 13D. The Filers may, at any time and from time to time, review or reconsider their investment in the Company and formulate plans or proposals with respect thereto, but have no present intention of doing so.
Item 5.	Interest in Securities of the Issuer
(a)	Regarding aggregate beneficial ownership, see row 11 of the cover page of eah Filer. Regarding percentage beneficial ownership, see Row 13 of the cover page of each Filer. regarding sole power to vote shares, see Row 7 of the cover page of each Filer. regarding shared power to vote shares, see Row 8 of the cover page of each Filer. Regarding sole power to dispose of shares, see Row 9 of the cover page of each Filer. Regarding shared power to dispose of these shares, see Row 10 of the cover page of each Filer. The percentage listed in Row 13 for the Filer was calculated based on 16,648,947 shares of Common Stock reported to be outstanding on November 10, 2025, as set forth in the Issuer's Current Report on Form 10-Q for the three months ended September 30, 2025 filed with the Secutiites and Exchange Commission.
(b)	Regarding aggregate beneficial ownership, see row 11 of the cover page of eah Filer. Regarding percentage beneficial ownership, see Row 13 of the cover page of each Filer. regarding sole power to vote shares, see Row 7 of the cover page of each Filer. regarding shared power to vote shares, see Row 8 of the cover page of each Filer. Regarding sole power to dispose of shares, see Row 9 of the cover page of each Filer. Regarding shared power to dispose of these shares, see Row 10 of the cover page of each Filer. The percentage listed in Row 13 for the Filer was calculated based on 16,648,947 shares of Common Stock reported to be outstanding on November 10, 2025, as set forth in the Issuer's Current Report on Form 10-Q for the three months ended September 30, 2025 filed with the Secutiites and Exchange Commission.
(c)	Trade Activity for Common Stock of the Issuer effected by WHLLC from March 12, 2026 through March 16, 2026. Amount of Shares Date Security Purchased Price per Share 3/12/2026 Common Stock 800 $5.8209000 3/12/2026 Common Stock 900 $5.9900000 3/12/2026 Common Stock 800 $5.9900000 3/12/2026 Common Stock 1,000 $5.9876700 3/12/2026 Common Stock 900 $5.9900000 3/12/2026 Common Stock 900 $5.9900000 3/12/2026 Common Stock 600 $5.9600000 3/12/2026 Common Stock 800 $5.9600000 3/12/2026 Common Stock 1,300 $6.0000000 3/12/2026 Common Stock 900 $6.0000000 3/12/2026 Common Stock 1,400 $6.0000000 3/12/2026 Common Stock 1,300 $5.9999846 3/12/2026 Common Stock 1,000 $6.0398000 3/12/2026 Common Stock 1,400 $6.0000000 3/12/2026 Common Stock 1,000 $6.0000000 3/12/2026 Common Stock 1,200 $5.9999833 3/12/2026 Common Stock 1,600 $5.9251000 3/12/2026 Common Stock 1,000 $5.9223000 3/12/2026 Common Stock 1,600 $5.9250000 3/12/2026 Common Stock 1,800 $5.9132000 3/12/2026 Common Stock 1,700 $5.9250000 3/12/2026 Common Stock 1,800 $5.9873000 3/12/2026 Common Stock 1,900 $5.9200000 3/12/2026 Common Stock 1,800 $5.9873000 3/12/2026 Common Stock 2,100 $5.9382857 3/12/2026 Common Stock 722 $5.9746814 3/12/2026 Common Stock 2 $6.0000000 3/12/2026 Common Stock 200 $6.0100000 3/12/2026 Common Stock 117 $6.0000000 3/12/2026 Common Stock 600 $5.9900000 3/12/2026 Common Stock 100 $6.0700000 3/12/2026 Common Stock 100 $6.0280000 3/12/2026 Common Stock 100 $6.0000000 3/12/2026 Common Stock 100 $6.0312000 3/12/2026 Common Stock 100 $6.0799000 3/12/2026 Common Stock 100 $6.0312000 3/13/2026 Common Stock 100 $6.0400000 3/13/2026 Common Stock 600 $6.0400000 3/13/2026 Common Stock 900 $6.0400000 3/13/2026 Common Stock 2 $6.0300000 3/13/2026 Common Stock 1,500 $6.1365667 3/13/2026 Common Stock 102 $6.2496078 3/13/2026 Common Stock 500 $6.2998800 3/13/2026 Common Stock 800 $6.2300000 3/13/2026 Common Stock 14 $6.2885714 3/13/2026 Common Stock 600 $6.3156000 3/13/2026 Common Stock 900 $6.2960333 3/13/2026 Common Stock 800 $6.3087000 3/13/2026 Common Stock 1,400 $6.2943500 3/13/2026 Common Stock 325 $6.3200000 3/13/2026 Common Stock 1,200 $6.2300000 3/13/2026 Common Stock 1,400 $6.2354786 3/13/2026 Common Stock 1,700 $6.2300000 3/13/2026 Common Stock 1,900 $6.2173684 3/13/2026 Common Stock 2,100 $6.2312381 3/13/2026 Common Stock 1,000 $6.2799000 3/13/2026 Common Stock 1,500 $6.2675067 3/13/2026 Common Stock 1,900 $6.2792105 3/13/2026 Common Stock 1,500 $6.2799000 3/13/2026 Common Stock 1,700 $6.2755000 3/13/2026 Common Stock 1,336 $6.2799027 3/13/2026 Common Stock 500 $6.1450000 3/13/2026 Common Stock 900 $6.1449222 3/13/2026 Common Stock 1,200 $6.1183000 3/13/2026 Common Stock 1,500 $6.1450000 3/13/2026 Common Stock 1,200 $6.1615000 3/13/2026 Common Stock 1,300 $6.2083462 3/13/2026 Common Stock 1,400 $6.1400000 3/13/2026 Common Stock 1,700 $6.2082353 3/13/2026 Common Stock 1,800 $6.1917000 3/13/2026 Common Stock 1,700 $6.1911000 3/13/2026 Common Stock 1,262 $6.1892314 3/13/2026 Common Stock 800 $6.2682000 3/13/2026 Common Stock 900 $6.3387000 3/13/2026 Common Stock 1,200 $6.2859000 3/13/2026 Common Stock 1,000 $6.2800000 3/13/2026 Common Stock 1,200 $6.3690083 3/13/2026 Common Stock 1,300 $6.3699538 3/13/2026 Common Stock 900 $6.4100000 3/13/2026 Common Stock 800 $6.3871000 3/13/2026 Common Stock 500 $6.4298200 3/13/2026 Common Stock 900 $6.4199444 3/13/2026 Common Stock 1,000 $6.4114000 3/13/2026 Common Stock 1,000 $6.4000000 3/13/2026 Common Stock 1,000 $6.4000000 3/13/2026 Common Stock 1,000 $6.4604000 3/13/2026 Common Stock 1,000 $6.3334000 3/13/2026 Common Stock 1,000 $6.2766000 3/13/2026 Common Stock 1,000 $6.2924800 3/13/2026 Common Stock 1,000 $6.2842000 3/13/2026 Common Stock 1,000 $6.2766000 3/13/2026 Common Stock 1,000 $6.2750000 3/13/2026 Common Stock 1,000 $6.3000000 3/13/2026 Common Stock 2,500 $6.2993000 3/13/2026 Common Stock 2,000 $6.2924200 3/13/2026 Common Stock 485 $6.2980000 3/13/2026 Common Stock 1,200 $6.3300000 3/13/2026 Common Stock 1,500 $6.3308000 3/13/2026 Common Stock 1,300 $6.3599000 3/13/2026 Common Stock 1,302 $6.3598694 3/13/2026 Common Stock 1,500 $6.4237867 3/13/2026 Common Stock 2,000 $6.3800000 3/13/2026 Common Stock 200 $6.4300000 3/13/2026 Common Stock 100 $6.4700000 3/13/2026 Common Stock 100 $6.4700000 3/13/2026 Common Stock 100 $6.4700000 3/13/2026 Common Stock 100 $6.4215000 3/13/2026 Common Stock 100 $6.4050000 3/13/2026 Common Stock 100 $6.4700000 3/13/2026 Common Stock 100 $6.4100000 3/13/2026 Common Stock 100 $6.4363000 3/13/2026 Common Stock 100 $6.4100000 3/13/2026 Common Stock 100 $6.4342000 3/13/2026 Common Stock 100 $6.4610000 3/13/2026 Common Stock 100 $6.4900000 3/13/2026 Common Stock 100 $6.4150000 3/13/2026 Common Stock 100 $6.4232000 3/13/2026 Common Stock 100 $6.4250000 3/13/2026 Common Stock 100 $6.4249000 3/13/2026 Common Stock 100 $6.4415000 3/13/2026 Common Stock 100 $6.4301000 3/13/2026 Common Stock 100 $6.4323000 3/13/2026 Common Stock 100 $6.4250000 3/13/2026 Common Stock 100 $6.4355000 3/13/2026 Common Stock 100 $6.4250000 3/13/2026 Common Stock 100 $6.4250000 3/13/2026 Common Stock 100 $6.4389000 3/13/2026 Common Stock 100 $6.4415000 3/13/2026 Common Stock 100 $6.4250000 3/13/2026 Common Stock 500 $6.4237000 3/13/2026 Common Stock 1,400 $6.4050000 3/13/2026 Common Stock 1,000 $6.4237000 3/13/2026 Common Stock 1,000 $6.4730000 3/13/2026 Common Stock 1,000 $6.4762100 3/13/2026 Common Stock 1,000 $6.4050000 3/13/2026 Common Stock 1,000 $6.4898500 3/13/2026 Common Stock 1,000 $6.4050000 3/13/2026 Common Stock 100 $6.4434000 3/13/2026 Common Stock 1,000 $6.4880400 3/13/2026 Common Stock 1,000 $6.4999000 3/13/2026 Common Stock 1,000 $6.4999000 3/13/2026 Common Stock 1,000 $6.4916200 3/13/2026 Common Stock 1,000 $6.4961900 3/13/2026 Common Stock 1,000 $6.5273900 3/13/2026 Common Stock 1,000 $6.4400000 3/13/2026 Common Stock 1,000 $6.4400000 3/13/2026 Common Stock 1,000 $6.5172700 3/13/2026 Common Stock 1,000 $6.5288600 3/13/2026 Common Stock 1,000 $6.4400000 3/13/2026 Common Stock 1,000 $6.4857100 3/13/2026 Common Stock 1,000 $6.4500000 3/13/2026 Common Stock 1,000 $6.4676000 3/13/2026 Common Stock 212 $6.5377358 3/13/2026 Common Stock 1,000 $6.5635000 3/16/2026 Common Stock 348 $7.0100000 3/16/2026 Common Stock 1,000 $7.0127700 3/16/2026 Common Stock 1,000 $7.0040000 3/16/2026 Common Stock 1,000 $7.0325300 3/16/2026 Common Stock 1,000 $7.0405600 3/16/2026 Common Stock 1,000 $6.9500000 3/16/2026 Common Stock 605 $6.9800826 3/16/2026 Common Stock 1,000 $6.9900000 3/16/2026 Common Stock 1,000 $6.9900000 3/16/2026 Common Stock 157 $6.9796815 3/16/2026 Common Stock 1 $6.9800000 3/16/2026 Common Stock 1,000 $6.9900000 3/16/2026 Common Stock 1,000 $6.9900000 3/16/2026 Common Stock 1,000 $6.9898100 3/16/2026 Common Stock 800 $6.9564000 3/16/2026 Common Stock 500 $6.9773800 3/16/2026 Common Stock 372 $6.9555376 3/16/2026 Common Stock 1,000 $6.9485000 3/16/2026 Common Stock 1,000 $6.9150000 3/16/2026 Common Stock 700 $6.8040143 3/16/2026 Common Stock 1,200 $6.8867917 3/16/2026 Common Stock 700 $6.7650000 3/16/2026 Common Stock 1,000 $6.7900000 3/16/2026 Common Stock 600 $6.8100000 3/16/2026 Common Stock 1,000 $6.8389600 3/16/2026 Common Stock 1,000 $6.8227400 3/16/2026 Common Stock 1,000 $6.7450000 3/16/2026 Common Stock 867 $6.8046943 3/16/2026 Common Stock 1,300 $6.7841692 3/16/2026 Common Stock 1,500 $6.7568000 3/16/2026 Common Stock 320 $6.8200000 3/16/2026 Common Stock 1,900 $6.8199000 3/16/2026 Common Stock 1,400 $6.7979000 3/16/2026 Common Stock 1,900 $6.7385263 3/16/2026 Common Stock 1,300 $6.7640000 3/16/2026 Common Stock 400 $6.7529000 3/16/2026 Common Stock 1,400 $6.7200000 3/16/2026 Common Stock 1,200 $6.7499000 3/16/2026 Common Stock 400 $6.7374250 3/16/2026 Common Stock 1,000 $6.7479300 3/16/2026 Common Stock 1,000 $6.6816000 3/16/2026 Common Stock 130 $6.6638462 3/16/2026 Common Stock 600 $6.5761000 3/16/2026 Common Stock 500 $6.6899000 3/16/2026 Common Stock 300 $6.6899000 3/16/2026 Common Stock 400 $6.6899000 3/16/2026 Common Stock 300 $6.6350000 3/16/2026 Common Stock 200 $6.6537000 3/16/2026 Common Stock 100 $6.6350000 3/16/2026 Common Stock 100 $6.6460000 3/16/2026 Common Stock 831 $6.5529362 3/16/2026 Common Stock 1,300 $6.6292308 3/16/2026 Common Stock 1,000 $6.4976600 3/16/2026 Common Stock 1,000 $6.5909000 3/16/2026 Common Stock 1,000 $6.5090000 3/16/2026 Common Stock 1,000 $6.3400000 3/16/2026 Common Stock 1,000 $6.4700000 3/16/2026 Common Stock 1,000 $6.5923300 3/16/2026 Common Stock 1,600 $6.4002000 3/16/2026 Common Stock 1,200 $6.3850000 3/16/2026 Common Stock 900 $6.4226000 3/16/2026 Common Stock 800 $6.4182250
(d)	No person other than the Filers is known to have the right to receive, or the power to direct the receipt of, dividends from or the proceeds from the sale of the Shares.
(e)	N/A
Item 6.	Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
	Except as described herein, there are no contracts, arrangements, understandings or other relationships with respect to any securities of the Company.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

WHITMORE BRADFORD T

Signature:	Bradford T. Whitmore
Name/Title:	Bradford T. Whitmore
Date:	03/16/2026

SUNRAY I, LLC

Signature:	Bradford T. Whitmore
Name/Title:	Manager
Date:	03/16/2026

Signature:	Whitmore Holdings, LLC
Name/Title:	Manager
Date:	03/16/2026

Whitmore Holdings, LLC

Signature:	Bradford T. Whitmore
Name/Title:	Manager
Date:	03/16/2026

Bradford Whitmore Trust

Signature:	Bradford T. Whitmore
Name/Title:	Trustee
Date:	03/16/2026

FAQ

How many Ultralife (ULBI) shares do the Whitmore entities beneficially own after this Schedule 13D amendment?

The Whitmore group reports beneficial ownership of 6,599,957 Ultralife common shares, equal to 39.6% of the class. This percentage is calculated using 16,648,947 shares outstanding as of November 10, 2025, as reported in Ultralife’s Form 10-Q for the quarter ended September 30, 2025.

What transactions triggered this Ultralife (ULBI) Schedule 13D/A Amendment No. 10?

Whitmore Holdings, LLC purchased 187,512 Ultralife common shares in open-market trades from March 12 through March 16, 2026. These buys occurred at numerous prices generally between the mid‑$5 range and slightly above $7 per share, increasing the group’s already substantial ownership stake.

Which entities are included in the Whitmore reporting group for Ultralife (ULBI)?

The reporting group consists of Bradford T. Whitmore, SUNRAY I, LLC, Whitmore Holdings, LLC, and Bradford Whitmore Trust. Whitmore is trustee of the trust and manager of both LLCs, and Whitmore Holdings, LLC is the sole member of SUNRAY I, LLC, creating a layered ownership structure.

Does the Whitmore group state any plans to change control or strategy at Ultralife (ULBI)?

The filers state they have no current plans or proposals regarding the actions listed in Item 4(a)-(j), such as mergers, major asset sales, or changes in control. They may review or reconsider their investment in Ultralife over time but express no present intention to do so.

How is Whitmore Holdings, LLC’s Ultralife (ULBI) stake structured within the group?

Whitmore Holdings, LLC reports 6,394,042 Ultralife shares beneficially owned, equal to 38.4% of the common stock. It directly holds 1,941,759 shares and, as sole member of SUNRAY I, LLC, is attributed SUNRAY I’s 4,452,283 shares, giving it both sole and shared voting and dispositive power.

What is SUNRAY I, LLC’s direct ownership in Ultralife (ULBI) according to this amendment?

SUNRAY I, LLC directly holds 4,452,283 shares of Ultralife common stock, representing 26.7% of the outstanding class. It reports sole voting and sole dispositive power over these shares, while being wholly owned by Whitmore Holdings, LLC, which is in turn owned by the Bradford Whitmore Trust.