As of November 9, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Pro-Dex, Inc. The largest reported stake is Swenson Nicholas John's, at 31.88%. One filing is on record since June 26, 2026 (Schedule 13D/A, June 26, 2026).
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Key facts
- · Reporting person: AO Partners I, L.P. · Sole voting: 0 · Shared voting: 922,204 · Sole dispositive: 0 · Shared dispositive: 922,204 · SCHEDULE 13D/A, 2026-06-26
- · Reporting person: AO Partners, LLC · Sole voting: 0 · Shared voting: 922,204 · Sole dispositive: 0 · Shared dispositive: 922,204 · SCHEDULE 13D/A, 2026-06-26
- · Reporting person: Swenson Nicholas John · Sole voting: 61,297 · Shared voting: 956,520 · Sole dispositive: 61,297 · Shared dispositive: 956,520 · SCHEDULE 13D/A, 2026-06-26
- · Reporting person: Groveland DST LLC · Sole voting: 0 · Shared voting: 34,316 · Sole dispositive: 0 · Shared dispositive: 34,316 · SCHEDULE 13D/A, 2026-06-26
- · Holder: Swenson Nicholas John · Percent: 31.88% · SCHEDULE 13D/A
Pro-Dex, Inc. has 1 Schedule 13D or 13G filing on record since 2026-06-26. 1 holder's latest filing reports 5% or more of common stock, no par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 31.88% | 1,017,817 | SCHEDULE 13D/A, 2026-06-26 | 2026-06-24 |
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| AO Partners I, L.P. | 0 | 922,204 | 0 | 922,204 | SCHEDULE 13D/A, 2026-06-26 |
| AO Partners, LLC | 0 | 922,204 | 0 | 922,204 | SCHEDULE 13D/A, 2026-06-26 |
| Swenson Nicholas John | 61,297 | 956,520 | 61,297 | 956,520 | SCHEDULE 13D/A, 2026-06-26 |
| Groveland DST LLC | 0 | 34,316 | 0 | 34,316 | SCHEDULE 13D/A, 2026-06-26 |
The latest filing identifies Pro-Dex, Inc. by CUSIP 74265M205 and gives its principal executive office as 2361 McGaw Avenue, Irvine, CA 92614 (SCHEDULE 13D/A, 2026-06-26).
Source of funds (Item 3)
The Common Stock of the Reporting Persons was acquired in open market purchases with working capital of AO Partners Fund and the personal investment capital of Mr. Swenson. The amount of funds expended to acquire the aggregate shares held by the Reporting Persons is $2,032,015.Swenson Nicholas John, SCHEDULE 13D/A, 2026-06-26
Purpose of Transaction (Item 4)
Swenson Nicholas John
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 4 of the SCHEDULE 13D/A filed 2026-06-26
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-06-26 | Swenson Nicholas John | 31.88% | SCHEDULE 13D/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.