Changes in Beneficial Ownership · 4

Smith Micro Software, Inc.

SMSINASDAQEQUITYCurrent

Changes in Beneficial Ownership

Filed Sep 15, 2026Accepted Sep 15, 2026, 5:07 PM EDTFiling CIK 948708Accession 0001437749-26-030475

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Structured filing — 4

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Filing details

Report period: 2026-09-15
Issuer: SMITH MICRO SOFTWARE, INC.
Issuer CIK: 0000948708
Trading symbol: SMSI

Reporting owner 1

Name: Huffmyer Timothy C.
Reporting owner CIK: 0001559111
Relationship: Director · Officer
Officer title: President and CEO
Address: 5800 CORPORATE DRIVE, PITTSBURGH, PA, 15237

Non-derivative transactions

Non-derivative transactions · 1 reported row
Security	Transaction date	Code	Amount	A / D	Price (USD)	Owned after	Ownership
Common stock	2026-09-15	F · Form 4	100	D	2.90^[F1]	36,279	D

Table key

F · Form 4: Securities delivered or withheld for exercise price or tax liability under Rule 16b-3
D: Direct

Footnotes

F1: Shares withheld, at an average vesting price of $2.90 per share, for the payment of income taxes.↩ 1

Signature 1

Signed: /s/ Jennifer M. Reinke as attorney-in-fact for Timothy C. Huffmyer
Date: 2026-09-15

Company context

The Company was incorporated in California in November 1983 and reincorporated in Delaware in June 1995. Our principal executive offices are located at 5800 Corporate Drive, Pittsburgh, Pennsylvania 15237, and our telephone number is (412) 837-5300. Our website address is www.smithmicro.com, and we make our filings with the U.S. Securities and Exchange Commission (the “SEC”) available on the Investor Relations page of our website. Information contained on our website does not constitute a part of this Report. Our common stock is traded on the Nasdaq Capital Market under the symbol “SMSI.”

Current securities

SMSINASDAQ · EQUITY · Current

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