# EDGAR Filing Document

**Accession Number:** 0000788920
**File Stem:** 0000897069-26-001456
**Filing Date:** 2026-6
**Character Count:** 18216
**Document Hash:** 20fc4f00e4664b421b087873aac453a3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000897069-26-001456.hdr.sgml**: 20260626

**ACCESSION NUMBER**: 0000897069-26-001456

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

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260626

**DATE AS OF CHANGE**: 20260626

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PRO DEX INC
- **CENTRAL INDEX KEY:** 0000788920
- **STANDARD INDUSTRIAL CLASSIFICATION:** SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 841261240
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-37216
- **FILM NUMBER:** 261130826

**BUSINESS ADDRESS:**
- **STREET 1:** 2361 MCGAW AVENUE
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92614
- **BUSINESS PHONE:** 949-769-3231

**MAIL ADDRESS:**
- **STREET 1:** 2361 MCGAW AVENUE
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92614

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PRO-DEX, INC.
- **DATE OF NAME CHANGE:** 20151110

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CONTEXT CAPITAL FUNDS
- **DATE OF NAME CHANGE:** 20151104

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PRO DEX INC
- **DATE OF NAME CHANGE:** 19920703
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Swenson Nicholas John
- **CENTRAL INDEX KEY:** 0001478067

**ORGANIZATION NAME:**

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

**MAIL ADDRESS:**
- **STREET 1:** 5000 WEST 36TH STREET
- **STREET 2:** SUITE 200
- **CITY:** MINNEAPOLIS
- **STATE:** MN
- **ZIP:** 55416

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 17)**

**PRO-DEX, INC.**

*(Name of Issuer)*

**Common Stock, no par value**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Nicholas J. Swenson**<br>5000 W 36th Street, Suite 200<br>Minneapolis MN 55416<br>(612) 353-6380

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

**06/24/2026**

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

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**AO Partners I, L.P.** | Name of reporting person<br>**AO Partners I, L.P.** | |
| 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>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 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>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**922204.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**922204.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**922204.00** | Aggregate amount beneficially owned by each reporting person<br>**922204.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**28.88%** | Percent of class represented by amount in Row (11)<br>**28.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**AO Partners, LLC** | Name of reporting person<br>**AO Partners, LLC** | |
| 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>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 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>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**922204.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**922204.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**922204.00** | Aggregate amount beneficially owned by each reporting person<br>**922204.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**28.88%** | Percent of class represented by amount in Row (11)<br>**28.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Swenson Nicholas John** | Name of reporting person<br>**Swenson Nicholas John** | |
| 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>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 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>**61297.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**956520.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**61297.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**956520.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1017817.00** | Aggregate amount beneficially owned by each reporting person<br>**1017817.00** | |
| 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>**31.88%** | Percent of class represented by amount in Row (11)<br>**31.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Groveland DST LLC** | Name of reporting person<br>**Groveland DST LLC** | |
| 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>**SOUTH DAKOTA** | Citizenship or place of organization<br>**SOUTH DAKOTA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**34316.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**34316.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**34316.00** | Aggregate amount beneficially owned by each reporting person<br>**34316.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.07%** | Percent of class represented by amount in Row (11)<br>**1.07%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, no par value

**(b) Name of Issuer:**
PRO-DEX, INC.

**(c) Address of Issuer's Principal Executive Offices:**
2361 McGaw Avenue, Irvine, CA, 92614

This Amended and Restated Schedule 13D relates to shares of the Common Stock, no par value, of Pro-Dex, Inc., a Colorado corporation (the "Issuer" or the "Company").

**Item 4. Purpose of Transaction**

The AO Partners Group acquired shares of Common Stock because it believes that the Common Stock is undervalued.  The AO Partners Group's intent is to influence the policies of the Issuer and assert shareholder rights, with a goal of maximizing the value of the Common Stock.

The Reporting Persons previously reported the transfer of shares of Common Stock to Groveland DST.  This transfer was effected solely for tax and estate planning purposes, and for income tax purposes was a transfer between Mr. Swenson, individually, and an entity owned by Mr. Swenson.

The Reporting Persons may make further purchases of shares of Common Stock.  The Reporting Persons may dispose of any or all the shares of Common Stock held by them.

To the extent the actions described herein may be deemed to constitute a "control purpose" with respect to the Securities Exchange Act of 1934, as amended, and the regulations thereunder, the Reporting Persons have such a purpose.  Except as noted in this Amended and Restated Schedule 13D, none of the Reporting Persons has any plans or proposals, which relate to, or would result in, any of the matters referred to in paragraphs (b) through (j), inclusive of Item (4) of Schedule 13D.  Such persons may, at any time and from time to time, review or reconsider their positions and formulate plans or proposals with respect thereto.

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

**(a)**
The following list sets forth the aggregate number and percentage (based on 3,192,759 shares of Common Stock outstanding as of April 30, 2026, as reflected in the Company's Quarterly Report on Form 10-Q filed on April 30, 2026) of outstanding shares of Common Stock owned beneficially by each Reporting Person named in Item 2:

Name of Reporting Person: AO Partners Fund
Aggregate Number of Shares Beneficially Owned: 922,204
Percentage of Outstanding: 28.88%

Name of Reporting Person: AO Partners
Aggregate Number of Shares Beneficially Owned: 922,204
Percentage of Outstanding: 28.88%

Name of Reporting Person: Groveland DST
Aggregate Number of Shares Beneficially Owned: 34,316
Percentage of Outstanding: 1.07%

Name of Reporting Person: Nicholas J. Swenson
Aggregate Number of Shares Beneficially Owned: 1,017,817
Percentage of Outstanding: 31.88%

**(b)**
The following list sets forth the ownership information for each of the Reporting Persons:

Name of Reporting Person: AO Partners Fund
Number of Shares Beneficially Owned with Sole Voting and Dispositive Power: 922,204
Number of Shares Beneficially Owned with Shared Voting and Dispositive Power: None

Name of Reporting Person: AO Partners
Number of Shares Beneficially Owned with Sole Voting and Dispositive Power: 922,204
Number of Shares Beneficially Owned with Shared Voting and Dispositive Power: None
Additional Information: AO Partners is the General Partner of AO Partners Fund.  Because Mr. Swenson is the Manager of AO Partners, he has the power to direct the affairs of AO Partners.  Therefore, AO Partners may be deemed to share with Mr. Swenson voting and dispositive power with regard to the 922,204 shares of Common Stock held by AO Partners Fund.

Name of Reporting Person: Groveland DST
Number of Shares Beneficially Owned with Sole Voting and Dispositive Power: 34,316
Number of Shares Beneficially Owned with Shared Voting and Dispositive Power: None
Additional Information: Because Mr. Swenson is the Manager and President of Groveland DST, he has the power to direct the affairs of Groveland DST, including the voting and disposition of shares of Common Stock held in the name of Groveland DST.

Name of Reporting Person: Nicholas J. Swenson
Number of Shares Beneficially Owned with Sole Voting and Dispositive Power: 61,297
Number of Shares Beneficially Owned with Shared Voting and Dispositive Power: 956,520
Additional Information: Because Mr. Swenson is the Manager of AO Partners, the General Partner of AO Partners Fund, he has the power to direct the affairs of AO Partners Fund, including the voting and disposition of shares of Common Stock held in the name of AO Partners Fund.  Because Mr. Swenson is the Manager and President of Groveland DST, he has the power to direct the affairs of Groveland DST, including the voting and disposition of shares of Common Stock held in the name of Groveland DST.  Therefore, Mr. Swenson is deemed to share voting and dispositive power with AO Partners Fund and Groveland DST with regard to those shares of Common Stock.  The Issuer granted Mr. Swenson stock options for 20,000 shares with various exercise and expiration dates, for his service on the Issuer's board of directors, none of which are exercisable within 60 days and are not reported in Mr. Swenson's holdings hereunder.

**(c)**
AO Partners Fund made the following sales (and no purchases) of shares of Common Stock in the past sixty days.  The other Reporting Persons had no sales and no purchases of shares of Common Stock in the past sixty days.

There have been no sales (and no purchases) in the past sixty days.

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

With respect to AO Partners Fund, AO Partners is entitled to (1) an allocation of a portion of profits, if any, and (2) a management fee based upon a percentage of total capital.

Mr. Swenson is indemnified by AO Partners Fund, AO Partners and Groveland DST for liabilities he may incur in connection with his duties for the AO Partners Group.  Mr. Swenson is not and will not become a party to any agreement, arrangement or understanding with, and has not given any commitment or assurance to, AO Partners Fund, AO Partners or Groveland DST (or any other person) as to how Mr. Swenson will, as a director or shareholder of the Issuer, act or vote on any issue or question.

AO Partners Fund secured a bank loan, pursuant to which it has pledged 922,204 shares of Common Stock, along with additional securities and collateral owned by AO Partners Fund, as collateral for the loan. The loan was obtained in the ordinary course of business.

Mr. Swenson secured a bank loan, pursuant to which he has pledged 61,170 shares of Common Stock, along with additional securities and collateral owned by him, as collateral for the loan. The loan was obtained in the ordinary course of business.

Other than the foregoing agreements and arrangements, and the Joint Filing Agreement attached hereto, there are no contracts, arrangements, understandings or relationships among the persons named in Item 2 hereof and between such persons and any person with respect to any securities of the Issuer.

### 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:** AO Partners I, L.P.

**Signature:** /s/ Nicholas J. Swenson

**Name/Title:** Manager of AO Partners, LLC

**Date:** 06/26/2026

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:** AO Partners, LLC

**Signature:** /s/ Nicholas J. Swenson

**Name/Title:** Manager

**Date:** 06/26/2026

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:** Swenson Nicholas John

**Signature:** /s/ Nicholas J. Swenson

**Name/Title:** Manager

**Date:** 06/26/2026

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:** Groveland DST LLC

**Signature:** /s/ Nicholas J. Swenson

**Name/Title:** Manager

**Date:** 06/26/2026