The Mosaic Company
MOS
697 hedge funds and large institutions have $7.2B invested in The Mosaic Company in 2026 Q1 according to their latest regulatory filings, with 144 funds opening new positions, 279 increasing their positions, 189 reducing their positions, and 96 closing their positions.
75% more funds holding in top 10
Funds holding in top 10: 4 → 7 (+3)
50% more first-time investments, than exits
New positions opened: 144 | Existing positions closed: 96
48% more repeat investments, than reductions
Existing positions increased: 279 | Existing positions reduced: 189
6% more funds holding
Funds holding: 658 → 697 (+39)
9% more call options, than puts
Call options by funds: $357M | Put options by funds: $328M
2% more capital invested
Capital invested by funds: $7.03B → $7.2B (+$175M)
2.85% less ownership
Funds ownership: 91.9% → 89.04% (-2.9%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$108M |
| 2 |
AQR Capital Management
Greenwich,
Connecticut
|
+$86.8M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$63.6M |
| 4 |
DnB Asset Management
Oslo,
Norway
|
+$61.8M |
| 5 |
Marshall Wace
London,
United Kingdom
|
+$57.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$301M |
| 2 |
D.E. Shaw & Co
New York
|
-$77.5M |
| 3 |
Squarepoint
New York
|
-$60.7M |
| 4 |
PVI
Pine Valley Investments
Marlton,
New Jersey
|
-$32.3M |
| 5 |
Millennium Management
New York
|
-$30.4M |
MOS Hedge Fund Activity: Q1 2026 in Review
697 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in The Mosaic Company (MOS) for Q1 2026, worth a combined $7.2B — up 2.5% from $7.03B a quarter earlier.
Buyers outnumbered sellers: 144 funds opened new MOS positions and 96 closed out — a net gain of 48 holders — while 279 added to existing stakes and 189 trimmed.
The largest buyer was T. Rowe Price Associates, adding an estimated $108M. The largest seller was Fidelity Investments, cutting an estimated $301M.
- 697 institutional investors held The Mosaic Company (MOS) as of Q1 2026, up from 658 in Q4 2025.
- Funds reported $7.2B of The Mosaic Company stock for Q1 2026, up 2.5% quarter-over-quarter.
- 144 funds opened new The Mosaic Company positions in Q1 2026 and 96 closed out, a net change of +48 holders.
- The largest The Mosaic Company buyer in Q1 2026 was T. Rowe Price Associates, an estimated $108M added.
- The largest The Mosaic Company seller in Q1 2026 was Fidelity Investments, an estimated $301M sold.
Based on aggregated 13F filings for Q1 2026.