As of November 6, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Latham Group, Inc. The largest reported stake is Wellington Management Group LLP's, at 10.2%. 7 filings are on record since November 14, 2025 (Schedule 13G/A, October 6, 2026).
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Key facts
- · Reporting person: Wellington Management Group LLP · Sole voting: 0 · Shared voting: 9,955,872 · Sole dispositive: 0 · Shared dispositive: 12,030,278 · SCHEDULE 13G/A, 2026-10-06
- · Holder: Wellington Management Group LLP · Percent: 9.7% · SCHEDULE 13G/A
- · Reporting person: Wynnchurch Capital Partners Iv, L.P. · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-05-20
- · Holder: Wellington Management Group LLP · Percent: 7.8% · SCHEDULE 13G/A
- · Holder: Wellington Management Group LLP · Percent: 5.8% · SCHEDULE 13G
Latham Group, Inc. has 7 Schedule 13D or 13G filings on record since 2025-11-14. 1 holder's latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Wellington Management Group LLP | 10.2% | 12,030,278 | SCHEDULE 13G/A, 2026-10-06 | 2026-09-30 |
| Voss Capital, LP | 3.86% | 4,500,000 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Wynnchurch Capital Partners Iv, L.P. | 0% | 0 | SCHEDULE 13G/A, 2026-05-20 | 2026-02-24 |
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More on Latham Group, Inc. and the records around it.
Latham Group, Inc. elsewhere on the record
Companies that share a holder
- Voss Value Master Fund, LP also filed stake reports on 13 other companies: Five9, Inc. (Oct 2026), Cellebrite DI Ltd. (Aug 2026), ALTA EQUIPMENT GROUP INC. (Jul 2026)
- Wellington Management Group LLP also filed stake reports on 240 other companies: Hub Group, Inc. (Oct 2026), Redwood Trust, Inc. (Oct 2026), TPG Inc. (Sep 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Wellington Management Group LLP | 0 | 9,955,872 | 0 | 12,030,278 | SCHEDULE 13G/A, 2026-10-06 |
| Wellington Group Holdings LLP | 0 | 9,955,872 | 0 | 12,030,278 | SCHEDULE 13G/A, 2026-10-06 |
| Wellington Investment Advisors Holdings LLP | 0 | 9,955,872 | 0 | 12,030,278 | SCHEDULE 13G/A, 2026-10-06 |
| Wellington Management Company LLP | 0 | 9,955,872 | 0 | 11,373,680 | SCHEDULE 13G/A, 2026-10-06 |
| Wynnchurch Capital Partners Iv, L.P. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
| Wynnchurch Partners IV, L.P. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
| Wynnchurch Capital, L.P. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
| Wc Partners Executive Iv, L.P. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
| John A. Hatherly | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
| Francis G. Hayes | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
| Christopher Patrick OBrien | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
| Gregory B. Gleason | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-20 |
The latest filing identifies Latham Group, Inc. by CUSIP 51819L107 and gives its principal executive office as 787 Watervliet Shaker Road, Latham (SCHEDULE 13G/A, 2026-10-06).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-11-14 | Wynnchurch Capital Partners Iv, L.P. | 5% | SCHEDULE 13G/A |
| 2025-11-14 | Voss Capital, LP | 3.86% | SCHEDULE 13G/A |
| 2026-02-10 | Wellington Management Group LLP | 5.8% | SCHEDULE 13G |
| 2026-05-15 | Wellington Management Group LLP | 7.8% | SCHEDULE 13G/A |
| 2026-05-20 | Wynnchurch Capital Partners Iv, L.P. | 0% | SCHEDULE 13G/A |
| 2026-08-13 | Wellington Management Group LLP | 9.7% | SCHEDULE 13G/A |
| 2026-10-06 | Wellington Management Group LLP | 10.2% | SCHEDULE 13G/A |
Questions about who owns Latham Group, Inc.
Who owns Latham Group, Inc.?
On this page, one holder's latest ownership filing reports 5% or more of Latham Group, Inc.: Wellington Management Group LLP (10.2%, Schedule 13G/A, filed 2026-10-06).
When did Wellington Management Group LLP buy into Latham Group, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Wellington Management Group LLP on this page is the Schedule 13G, filed 2026-02-10, reporting 5.8%; its latest, Schedule 13G/A filed 2026-10-06, reports 10.2%.
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%); 7 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.