# EDGAR Filing Document

**Accession Number:** 0000948708
**File Stem:** 0001437749-26-019891
**Filing Date:** 2026-6
**Character Count:** 10080
**Document Hash:** 970dc20cb828fef611283efc3698e4e3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-019891.hdr.sgml**: 20260608

**ACCESSION NUMBER**: 0001437749-26-019891

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260608

**DATE AS OF CHANGE**: 20260608

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SMITH MICRO SOFTWARE, INC.
- **CENTRAL INDEX KEY:** 0000948708
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 330029027
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-81588
- **FILM NUMBER:** 261074269

**BUSINESS ADDRESS:**
- **STREET 1:** 5800 CORPORATE DRIVE
- **CITY:** PITTSBURGH
- **STATE:** PA
- **ZIP:** 15237
- **BUSINESS PHONE:** 4128375300

**MAIL ADDRESS:**
- **STREET 1:** 5800 CORPORATE DRIVE
- **CITY:** PITTSBURGH
- **STATE:** PA
- **ZIP:** 15237

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SMITH MICRO SOFTWARE, INC
- **DATE OF NAME CHANGE:** 20181023

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SMITH MICRO SOFTWARE INC
- **DATE OF NAME CHANGE:** 19950731
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SMITH WILLIAM W JR
- **CENTRAL INDEX KEY:** 0001251368

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **STREET 1:** 51 COLUMBIA
- **CITY:** ALISOVIEJO
- **STATE:** CA
- **ZIP:** 92656

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 4)**

**SMITH MICRO SOFTWARE, INC.**

*(Name of Issuer)*

**Common Stock, par value $0.001 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**William W. Smith, Jr.**<br>Smith Micro Software, Inc.<br>120 Vantis Drive, Suite 350<br>Aliso Viejo CA 92656<br>(949) 362-5800

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

**06/04/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**SMITH WILLIAM W JR** | Name of reporting person<br>**SMITH WILLIAM W JR** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**58704.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**2576497.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**58704.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**2576497.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**2635201.00** | Aggregate amount beneficially owned by each reporting person<br>**2635201.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**40.2%** | Percent of class represented by amount in Row (11)<br>**40.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** (Explanatory Note)    This is Amendment No. 4 (this "Amendment") to Schedule 13D (as previously amended, the "Schedule") filed on November 17, 2025 by William W. Smith, Jr., relating to the ownership of shares of Common Stock, par value $0.001 per share (the "Common Stock") of Smith Micro Software, Inc., a Delaware corporation (the "Issuer"). The Issuer completed a 1 for 5 reverse stock split with a market effective date of June 5, 2026 ("Reverse Stock Split"). On the market effective date of the Reverse Stock Split, the Issuer's common stock commenced trading under a new CUSIP number, 832154504. All share numbers contained in this Form 13D/A reflect the effectiveness of the Reverse Stock Split. The purpose of this Amendment is to reflect changes resulting from a common stock purchase warrant purchased on February 3, 2026 for investment purposes by the Smith Living Trust, for which William W. Smith, Jr. serves as co-trustee, having become exercisable within 60 days. Except as specifically set forth herein, the Schedule otherwise remains unmodified. Capitalized terms used herein and not otherwise defined shall have the respective meanings ascribed to them in the Schedule.

(1)    The shared voting power and aggregate amount beneficially owned by the Reporting Person includes 2,576,497 shares held in the name of the Smith Living Trust, for which Mr. Smith and his spouse are co-trustees, including 1,472,962 shares of common stock not outstanding which the Smith Living Trust has the right to acquire within sixty (60) days upon the exercise of warrants.

(2)    The percent of class beneficially owned by the Reporting Person is based on 5,086,650 shares of common stock outstanding following the Reverse Stock Split (which is based on 25,433,247 shares of common stock outstanding prior to the Reverse Stock Split, as reflected in the records of the Issuer's transfer agent) and 1,472,962 shares of common stock not outstanding which the Smith Living Trust has the right to acquire within sixty (60) days upon the exercise of warrants, in accordance with Rule 13d-3(d)(1)(i).

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.001 per share

**(b) Name of Issuer:**
SMITH MICRO SOFTWARE, INC.

**(c) Address of Issuer's Principal Executive Offices:**
5800 CORPORATE DRIVE, PITTSBURGH, PA, 15237

**Item 4. Purpose of Transaction**

Item 4 of the Schedule is hereby amended to add the following:

As noted in the Explanatory Note, on February 3, 2026, the Smith Living Trust purchased for investment purposes a common stock purchase warrant exercisable for 296,033 shares of Common Stock which as a result of the passage of time has become exercisable within 60 days.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5(a) is hereby amended and restated as follows:

William W. Smith, Jr. has sole voting and dispositive power over 58,704 shares (0.9% of the Common Stock) and shared voting and dispositive power over 2,576,497 shares (39.3% of the Common Stock), including 1,472,962 shares of common stock not outstanding which the Smith Living Trust has the right to acquire within sixty (60) days upon the exercise of warrants. The shares over which Mr. Smith has shared voting and dispositive power are held by the Smith Living Trust, for which Mr. Smith and his spouse are co-trustees. In the aggregate, William W. Smith, Jr. has beneficial ownership of 2,635,201 shares (or 40.2%) of the Common Stock.

The above calculations are based on 5,086,650 shares of common stock outstanding following the Reverse Stock Split (which is based on 25,433,247 shares of common stock outstanding prior to the Reverse Stock Split, as reflected in the records of the Issuer's transfer agent) and 1,472,962 shares of common stock not outstanding which the Smith Living Trust has the right to acquire within sixty (60) days upon the exercise of warrants, in accordance with Rule 13d-3(d)(1)(i).

**(b)**
Item 5(b) is hereby amended and restated as follows:

William W. Smith, Jr. has sole voting and dispositive power over 58,704 shares (0.9% of the Common Stock) and shared voting and dispositive power over 2,576,497 shares (39.3% of the Common Stock), including 1,472,962 shares of common stock not outstanding which the Smith Living Trust has the right to acquire within sixty (60) days upon the exercise of warrants.

The shares over which Mr. Smith has shared voting and dispositive power are held by the Smith Living Trust, for which Mr. Smith and his spouse are co-trustees.

In the aggregate, William W. Smith, Jr. has beneficial ownership of 2,635,201 shares (or 40.2%) of the Common Stock.

The above calculations are based on 5,086,650 shares of common stock outstanding following the Reverse Stock Split (which is based on 25,433,247 shares of common stock outstanding prior to the Reverse Stock Split, as reflected in the records of the Issuer's transfer agent) and 1,472,962 shares of common stock not outstanding which the Smith Living Trust has the right to acquire within sixty (60) days upon the exercise of warrants, in accordance with Rule 13d-3(d)(1)(i).

**(c)**
On June 4, 2026, a common stock purchase warrant for 296,033 shares purchased on February 3, 2026 for investment purposes by the Smith Living Trust, for which William W. Smith, Jr. serves as co-trustee, became exercisable within 60 days.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Item 6 is hereby amended to add the following information:

Items 5(a), 5(b), 5(c) and 5(d) are incorporated by reference herein.

### 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.

**Reporting Person:** SMITH WILLIAM W JR

**Signature:** /s/ William W. Smith, Jr.

**Name/Title:** William W. Smith, Jr.

**Date:** 06/08/2026