The Mosaic Company
714 hedge funds and large institutions have $10.3B invested in The Mosaic Company in 2025 Q3 according to their latest regulatory filings, with 104 funds opening new positions, 269 increasing their positions, 228 reducing their positions, and 92 closing their positions.
18% more repeat investments, than reductions
Existing positions increased: 269 | Existing positions reduced: 228
13% more first-time investments, than exits
New positions opened: 104 | Existing positions closed: 92
1% more funds holding
Funds holding: 706 → 714 (+8)
6% more capital inflows, than outflows
Capital inflows: $1.7B | Capital outflows: $1.61B
0.89% more ownership
Funds ownership: 92.61% → 93.5% (+0.89%)
1% less call options, than puts
Call options by funds: $276M | Put options by funds: $279M
43% less funds holding in top 10
Funds holding in top 10: 7 → 4 (-3)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$552M |
| 2 |
AQR Capital Management
Greenwich,
Connecticut
|
+$251M |
| 3 |
Bank of New York Mellon
New York
|
+$134M |
| 4 |
Squarepoint
New York
|
+$59.9M |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
+$44.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Boston Partners
Boston,
Massachusetts
|
-$235M |
| 2 |
D.E. Shaw & Co
New York
|
-$100M |
| 3 |
Fuller & Thaler Asset Management
San Mateo,
California
|
-$76.4M |
| 4 |
Millennium Management
New York
|
-$65.3M |
| 5 |
Point72 Asset Management
Stamford,
Connecticut
|
-$64.1M |
MOS Hedge Fund Activity: Q3 2025 in Review
714 of the 7,647 institutional investors tracked by Wall St. Rank reported a position in The Mosaic Company (MOS) for Q3 2025, worth a combined $10.3B — down 4% from $10.7B a quarter earlier.
Buyers outnumbered sellers: 104 funds opened new MOS positions and 92 closed out — a net gain of 12 holders — while 269 added to existing stakes and 228 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $552M. The largest seller was Boston Partners, cutting an estimated $235M.
- 714 institutional investors held The Mosaic Company (MOS) as of Q3 2025, up from 706 in Q2 2025.
- Funds reported $10.3B of The Mosaic Company stock for Q3 2025, down 4% quarter-over-quarter.
- 104 funds opened new The Mosaic Company positions in Q3 2025 and 92 closed out, a net change of +12 holders.
- The largest The Mosaic Company buyer in Q3 2025 was Fidelity Investments, an estimated $552M added.
- The largest The Mosaic Company seller in Q3 2025 was Boston Partners, an estimated $235M sold.
Based on aggregated 13F filings for Q3 2025.