As of November 6, 2026, Mosaic Co. is a publicly traded company (NYSE: MOS); its largest reported holder is Vanguard, with 7.37% on Schedule 13G of April 30, 2026, then AQR (5.76%). The largest insider holding is Karen A. Swager, the executive vice president - operations, with 184,989 shares (0.06% of shares outstanding), per Form 4 of November 3, 2026 (Schedule 13G, April 30, 2026).
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Is Mosaic Co. a real, registered company?
- Mosaic Co files with the SEC under CIK 1285785 (its SEC filings).
- Its shares are listed under the ticker MOS on NYSE (SEC company record).
- business address in Tampa, Florida, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under MOSAIC CO in our court records and SEC 8-K records (as of 2026-11-06).
- Layoffs: 1 state WARN notice (latest 2026-10-14, Fort Meade FL, 199 employees).
- Leadership changes: the latest reported is Karen A. Swager (Form 8-K filed 2026-09-25). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names AQR (filed 2026-08-12).
Who are Mosaic Co.'s owners and officers?
Mosaic Co.: business address in Tampa, Florida; industry Agricultural Chemicals (Form D, 2026-09-25).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-08-12 | Aqr Capital Management, LLC | 5.76% |
| Schedule 13G/A, 2026-08-06 | Fmr LLC | 4.2% |
| Schedule 13G/A, 2026-05-06 | Fmr LLC | 9.1% |
| Schedule 13G, 2026-04-30 | Vanguard Capital Management | 7.37% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-05 | Fmr LLC | 12.6% |
| Schedule 13G/A, 2025-09-08 | Fmr LLC | 11.1% |
| Schedule 13G/A, 2025-08-14 | T. Rowe Price Associates, Inc. | 0.7% |
| Schedule 13G, 2025-08-06 | Fmr LLC | 6.6% |
Questions about who owns Mosaic Co.
Who owns Mosaic Co.?
On this page, 2 holders' latest ownership filings report 5% or more of Mosaic Co.: Vanguard Capital Management (7.37%, Schedule 13G, filed 2026-04-30) and Aqr Capital Management, LLC (5.76%, Schedule 13G, filed 2026-08-12).
Who are the largest shareholders of Mosaic Co.?
By the share each holder's latest filing reports, the largest holders of Mosaic Co. on this page are Vanguard Capital Management (7.37%) and Aqr Capital Management, LLC (5.76%).
When did Vanguard Capital Management buy into Mosaic Co.?
The filings give report dates, not purchase dates. The earliest filing from Vanguard Capital Management on this page is the Schedule 13G, filed 2026-04-30, reporting 7.37%.
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%); 9 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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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-09-25 | Karen A. Swager | departed | ||
| Form 8-K, 2026-09-25 | Karen A. Swager | Executive Vice President | departed | 2026-12-01 |
| Form 8-K, 2026-09-25 | Walter F. Precourt | Executive Vice President | appointed | 2026-12-01 |
| Form 8-K, 2026-09-25 | Walter F. Precourt | Chief Administrative Officer | appointed | 2023-11-01 |
Which insiders own Mosaic Co. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the executive vice president - operations: 184,989 shares (0.06% of shares outstanding) (Form 4, 2026-11-03).
- , a director: 150,431 shares (0.05% of shares outstanding), 7,310 held directly and 143,121 indirectly (Form 4, 2026-06-01).
- , the senior vice president - chief admin officer: 116,198 shares (0.04% of shares outstanding) (Form 4, 2026-08-21).
- , a director: 86,228 shares (0.03% of shares outstanding) (Form 4, 2026-06-01).
- , a director: 79,527 shares (0.03% of shares outstanding) (Form 4, 2026-06-01).
Shares outstanding: 317,903,655 as of 2026-10-30, from the company's latest SEC cover page.
How much has Mosaic Co. raised?
No fundraising or offering filing from Mosaic Co. is on file with us.
Keep reading
More on Mosaic Co. and the records around it.
Mosaic Co. elsewhere on the record
- Leadership changes Sep 2026
Companies that share a holder
- AQR Capital Management, LLC also filed stake reports on 190 other companies: Bold Eagle Acquisition Corp. (Nov 2026), Centurion Acquisition Corp. (Aug 2026), FG Merger II Corp. n/k/a BOXABL Inc. (Aug 2026)
- T. Rowe Price Associates, Inc. also filed stake reports on 191 other companies: PACIFIC BIOSCIENCES OF CALIF (Nov 2026), APARTMENT INVT & MGMT CO -A (Oct 2026), BETA BIONICS INC (Oct 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
Related pages
LayoffsLeadership changes5%+ holders
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