As of November 8, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Alta Equipment Group Inc. The largest reported stake is Mill Road Capital III, L.P.'s, at 13.3%. 5 filings are on record since July 16, 2025 (Schedule 13D/A, January 22, 2026).
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Key facts
- · Reporting person: Voss Value Master Fund, LP · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-14
- · Reporting person: CastleKnight Master Fund LP · Sole voting: 0 · Shared voting: 1,797,525 · Sole dispositive: 0 · Shared dispositive: 1,797,525 · SCHEDULE 13G, 2026-07-10
- · Holder: Voss Capital, LP · Percent: 7.8% · SCHEDULE 13G/A
- · Holder: Mill Road Capital III, L.P. · Percent: 13.3% · SCHEDULE 13D/A
- · Holder: BlackRock, Inc. · Percent: 4.9% · SCHEDULE 13G/A
Alta Equipment Group Inc. has 5 Schedule 13D or 13G filings on record since 2025-07-16. 2 holders' latest filing reports 5% or more of common stock, $0.0001 par value per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Mill Road Capital III, L.P. | 13.3% | 4,293,208 | SCHEDULE 13D/A, 2026-01-22 | 2026-01-21 |
| CastleKnight Master Fund LP | 5.5% | 1,797,525 | SCHEDULE 13G, 2026-07-10 | 2026-07-02 |
| BlackRock, Inc. | 4.9% | 1,640,566 | SCHEDULE 13G/A, 2025-07-16 | 2025-06-30 |
| Voss Capital, LP | 3.5% | 1,129,445 | SCHEDULE 13G/A, 2026-07-14 | 2026-06-30 |
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More on Alta Equipment Group Inc. and the records around it.
Alta Equipment Group Inc. elsewhere on the record
Companies that share a holder
- Mill Road Capital III, L.P. also filed stake reports on 2 other companies: Mistras Group, Inc. (Sep 2026), Landsea Homes Corporation (Jul 2025)
- Voss Value Master Fund, LP also filed stake reports on 13 other companies: Five9, Inc. (Oct 2026), Cellebrite DI Ltd. (Aug 2026), CENTERSPACE (Jul 2026)
- CastleKnight Master Fund LP also filed stake reports on 17 other companies: Suja Life, Inc. (Aug 2026), Advantage Solutions Inc. (Aug 2026), HAIN CELESTIAL GROUP INC (Aug 2026)
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What the Full Report on Alta Equipment Group Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| CastleKnight Master Fund LP | 0 | 1,797,525 | 0 | 1,797,525 | SCHEDULE 13G, 2026-07-10 |
| CastleKnight Fund GP LLC | 0 | 1,797,525 | 0 | 1,797,525 | SCHEDULE 13G, 2026-07-10 |
| CastleKnight Management LP | 0 | 1,797,525 | 0 | 1,797,525 | SCHEDULE 13G, 2026-07-10 |
| CastleKnight Management GP LLC | 0 | 1,797,525 | 0 | 1,797,525 | SCHEDULE 13G, 2026-07-10 |
| Weitman Capital LLC | 0 | 1,797,525 | 0 | 1,797,525 | SCHEDULE 13G, 2026-07-10 |
| Aaron Weitman | 0 | 1,797,525 | 0 | 1,797,525 | SCHEDULE 13G, 2026-07-10 |
| Voss Value Master Fund, LP | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-07-14 |
| Voss Value-Oriented Special Situations Fund, LP | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-07-14 |
| Voss Advisors GP, LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-07-14 |
| Voss Capital, LP | 1,129,445 | 0 | 1,129,445 | 0 | SCHEDULE 13G/A, 2026-07-14 |
| Cocke Travis W. | 1,129,445 | 0 | 1,129,445 | 0 | SCHEDULE 13G/A, 2026-07-14 |
The latest filing identifies Alta Equipment Group Inc. by CUSIP 02128L106 and gives its principal executive office as 13211 MERRIMAN ROAD, LIVONIA, MI 48150 (SCHEDULE 13G/A, 2026-07-14).
What the percentages are based on
The aggregate percentage of the Shares reported owned by each person named herein is based upon 32,535,540 Shares outstanding as of May 5, 2026, which is the total number of Shares outstanding as disclosed in the Issuer's Form 10Q filed with the Securities and Exchange Commission on May 7, 2026.Voss Capital, LP, SCHEDULE 13G/A, 2026-07-14
Purpose of Transaction (Item 4)
Mill Road Capital III, L.P.
Item 4 of the Schedule 13D shall hereby be amended by inserting the following new paragraphs after the second paragraph: On January 21, 2026, (a) the Issuer and Deven Petito entered into a Board Observer Agreement (the "Board Observer Agreement") and (b) the Issuer and the Fund entered into a Cooperation Agreement (the "Cooperation Agreement"). Pursuant to the Board Observer Agreement, Mr. Petito is entitled to attend meetings of the board of directors of the Issuer (the "Board") and any committees thereof in a non-voting observer capacity, subject to the terms and conditions set forth therein and in the Cooperation Agreement. The Board Observer Agreement provides, among other things, that Mr. Petito will be entitled to receive notices of meetings of the Board and its committees and copies of relevant materials at the same time as furnished to members of the Board or such committee, subject to exceptions to preserve attorney-client privilege or address conflicts of interest. It also provides for certain confidentiality obligations. The Board Observer Agreement will terminate upon the earliest to occur of (i) the expiration or termination of the Cooperation Agreement in accordance with its terms, (ii) the delivery by Mr. Petito of written notice to the Issuer of his resignation, or the death or permanent disability of Mr. Petito, (iii) the termination of Mr. Petito's status as Board observer pursuant to the terms of the Cooperation Agreement or (iv) the delivery by the …The first part of Item 4 of the SCHEDULE 13D/A filed 2026-01-22; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-16 | BlackRock, Inc. | 4.9% | SCHEDULE 13G/A |
| 2026-01-22 | Mill Road Capital III, L.P. | 13.3% | SCHEDULE 13D/A |
| 2026-04-22 | Voss Capital, LP | 7.8% | SCHEDULE 13G/A |
| 2026-07-10 | CastleKnight Master Fund LP | 5.5% | SCHEDULE 13G |
| 2026-07-14 | Voss Capital, LP | 3.5% | SCHEDULE 13G/A |
Questions about who owns Alta Equipment Group Inc.
Who owns Alta Equipment Group Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of Alta Equipment Group Inc.: Mill Road Capital III, L.P. (13.3%, Schedule 13D/A, filed 2026-01-22) and CastleKnight Master Fund LP (5.5%, Schedule 13G, filed 2026-07-10).
Who are the largest shareholders of Alta Equipment Group Inc.?
By the share each holder's latest filing reports, the largest holders of Alta Equipment Group Inc. on this page are Mill Road Capital III, L.P. (13.3%) and CastleKnight Master Fund LP (5.5%).
When did Mill Road Capital III, L.P. buy into Alta Equipment Group Inc.?
The filings give report dates, not purchase dates. The earliest filing from Mill Road Capital III, L.P. on this page is the Schedule 13D/A, filed 2026-01-22, reporting 13.3%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 5 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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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.