The Mosaic Company
US ˙ NYSE ˙ US61945C1036

SecurityMOS / The Mosaic Company
InstitutionBoston Partners
Latest Disclosed Ownership65,216 shares
Latest Disclosed Value $ 1,663,010
Boston Partners reports 3.11% decrease in ownership of MOS / The Mosaic Company

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 65,216 shares of The Mosaic Company (US:MOS) valued at $1,663,008 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 67,308 shares of The Mosaic Company. This represents a change in shares of -3.11% during the quarter. The current value of the position is $1,519,533 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F MOSAIC COM 61945C103 65,216 -2,092 -3.11 1,663 2.59 0.0007
2026-02-13 2025-12-31 13F MOSAIC CO COM 61945C103 67,308 -699,045 -91.22 1,621 -93.90 0.0017
2025-11-13 2025-09-30 13F MOSAIC CO COM 61945C103 766,353 -6,807,574 -89.88 26,577 -90.38 0.0273
2025-08-12 2025-06-30 13F/A-1 MOSAIC CO COM 61945C103 7,573,927 -405,453 -5.08 276,283 28.18 0.3068
2025-08-07 2025-06-30 13F MOSAIC CO COM 61945C103 7,414,462 -564,918 270,466 0.1242
2025-05-13 2025-03-31 13F MOSAIC CO COM 61945C103 7,979,380 2,368,094 42.20 215,540 56.22 0.2607
2025-02-11 2024-12-31 13F MOSAIC CO COM 61945C103 5,611,286 -1,394,714 -19.91 137,970 -26.46 0.1678
2024-11-12 2024-09-30 13F MOSAIC CO COM 61945C103 7,006,000 1,840,638 35.63 187,606 25.68 0.2214
2024-08-14 2024-06-30 13F MOSAIC CO COM 61945C103 5,165,362 3,886,340 303.85 149,273 259.73 0.1854
2024-05-28 2024-03-31 13F/A-1 MOSAIC CO COM 61945C103 1,279,022 1,211,544 1,795.47 41,496 8,940.52 0.0494
2024-05-13 2024-03-31 13F MOSAIC CO COM 61945C103 1,335,216 1,267,738 41,454 0.0205
2024-02-07 2023-12-31 13F MOSAIC CO COM 61945C103 67,478 67,478 459 0.0006
2023-11-08 2023-09-30 13F MOSAIC CO COM 61945C103 0 -31,853 -100.00 0 -100.00
2023-08-10 2023-06-30 13F MOSAIC CO COM 61945C103 31,853 31,853 320 0.0004
2023-02-08 2022-12-31 13F MOSAIC CO COM 61945C103 0 -7,803 -100.00 0 -100.00
2022-11-09 2022-09-30 13F MOSAIC CO COM 61945C103 7,803 -249 -3.09 378 -0.53 0.0006
2022-08-10 2022-06-30 13F MOSAIC CO COM 61945C103 8,052 -220,816 -96.48 380 -97.50 0.0005
2022-05-10 2022-03-31 13F MOSAIC CO COM 61945C103 228,868 -3,441,218 -93.76 15,222 -89.44 0.0184
2022-02-04 2021-12-31 13F MOSAIC CO COM 61945C103 3,670,086 -2,111,197 -36.52 144,200 -30.20 0.1737
2021-11-05 2021-09-30 13F MOSAIC CO COM 61945C103 5,781,283 -731,291 -11.23 206,578 -0.58 0.2617
2021-08-12 2021-06-30 13F MOSAIC CO COM 61945C103 6,512,574 -743,486 -10.25 207,789 -9.43 0.2650
2021-05-10 2021-03-31 13F MOSAIC CO COM 61945C103 7,256,060 -425,489 -5.54 229,416 29.80 0.3077
2021-02-10 2020-12-31 13F/A-1 MOSAIC CO COM 61945C103 7,681,549 -2,578,143 -25.13 176,752 -5.70 0.2749
2021-02-04 2020-12-31 13F MOSAIC CO COM 61945C103 7,681,549 -2,578,143 176,752 106,040.6941
2020-11-13 2020-09-30 13F/A-1 MOSAIC CO COM 61945C103 10,259,692 -1,798,058 -14.91 187,445 24.25 0.3413
2020-11-09 2020-09-30 13F MOSAIC CO COM 61945C103 12,057,750 0 150,856 110,746.2743
2020-08-12 2020-06-30 13F MOSAIC CO COM 61945C103 12,057,750 -1,053,587 -8.04 150,856 6.36 0.2771
2020-05-13 2020-03-31 13F MOSAIC CO COM 61945C103 13,111,337 -5,346,254 -28.97 141,834 -64.49 0.2817
2020-02-06 2019-12-31 13F/A-1 MOSAIC CO COM 61945C103 18,457,591 -2,109,351 -10.26 399,397 -5.28 0.5282
2020-02-05 2019-12-31 13F MOSAIC CO COM 61945C103 18,457,591 -2,109,351 399,397 224,552.6585
2019-11-20 2019-09-30 13F/A-1 MOSAIC CO COM 61945C103 20,566,942 3,296,438 19.09 421,643 -2.43 0.5710
2019-11-08 2019-09-30 13F MOSAIC CO COM 61945C103 17,423,851 153,347 434,432 0.5746
2019-08-26 2019-06-30 13F/A-1 MOSAIC CO COM 61945C103 17,270,504 19,742 0.11 432,139 -8.27 0.5667
2019-08-09 2019-06-30 13F MOSAIC CO COM 61945C103 17,271,094 20,332 432,154
2019-05-13 2019-03-31 13F/A-1 MOSAIC CO COM 61945C103 17,250,762 3,007,121 21.11 471,118 13.23 0.6242
2019-05-03 2019-03-31 13F MOSAIC CO COM 61945C103 17,250,762 3,007,121 471,118
2019-02-07 2018-12-31 13F MOSAIC CO COM 61945C103 14,243,641 4,814,199 51.05 416,057 35.85 0.5978
2018-11-14 2018-09-30 13F MOSAIC CO COM 61945C103 9,429,442 885,988 10.37 306,268 27.80 0.3559
2018-08-03 2018-06-30 13F MOSAIC CO COM 61945C103 8,543,454 8,364,214 4,666.49 239,644 5,406.53 0.2872
2018-05-04 2018-03-31 13F MOSAIC CO COM 61945C103 179,240 39,099 27.90 4,352 21.02 0.0052
2018-02-14 2017-12-31 13F/A-1 MOSAIC CO COM 61945C103 140,141 0 0.00 3,596 18.84 0.0042
2018-02-01 2017-12-31 13F MOSAIC CO COM 61945C103 140,141 0 3,596
2017-11-02 2017-09-30 13F MOSAIC CO COM 61945C103 140,141 -7,205 -4.89 3,026 -10.05 0.0037
2017-08-02 2017-06-30 13F MOSAIC CO COM 61945C103 147,346 -58,878 -28.55 3,364 -44.10 0.0043
2017-05-03 2017-03-31 13F MOSAIC CO COM 61945C103 206,224 -1,052,605 -83.62 6,018 -83.70 0.0077
2017-02-06 2016-12-31 13F MOSAIC CO COM 61945C103 1,258,829 -1,510,458 -54.54 36,922 -45.49 0.0485
2016-11-09 2016-09-30 13F MOSAIC CO COM 61945C103 2,769,287 -1,247,429 -31.06 67,737 -35.58 0.0947
2016-08-05 2016-06-30 13F MOSAIC CO COM 61945C103 4,016,716 16,432 0.41 105,157 -2.64 0.1519
2016-05-12 2016-03-31 13F MOSAIC CO COM 61945C103 4,000,284 -778,086 -16.28 108,008 -18.07 0.1591
2016-02-08 2015-12-31 13F MOSAIC CO COM 61945C103 4,778,370 2,584,197 117.78 131,835 93.13 0.1888
2015-11-10 2015-09-30 13F MOSAIC CO COM 61945C103 2,194,173 176,728 8.76 68,261 -27.78 0.1040
2015-08-10 2015-06-30 13F MOSAIC CO COM 61945C103 2,017,445 1,335,725 195.93 94,517 201.01 0.1358
2015-05-05 2015-03-31 13F MOSAIC CO COM 61945C103 681,720 681,720 31,400 0.0467
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.