The Mosaic Company
MX ˙ BMV ˙ US61945C1036
SecurityMX:MOS / The Mosaic Company
InstitutionRhumbline Advisers
Latest Disclosed Ownership590,663 shares
Latest Disclosed Value $ 15,061,864
Rhumbline Advisers reports 6.55% decrease in ownership of MOS / The Mosaic Company

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 590,663 shares of The Mosaic Company (MX:MOS) valued at $15,061,864 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 632,068 shares of The Mosaic Company. This represents a change in shares of -6.55% during the quarter.

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)
2026-05-12 2026-03-31 13F MOSAIC COM 61945C103 590,663 -41,405 -6.55 15,062 -1.08 0.0129
2026-02-13 2025-12-31 13F MOSAIC COM 61945C103 632,068 25,674 4.23 15,226 -27.60 0.0123
2025-11-06 2025-09-30 13F MOSAIC COM 61945C103 606,394 13,330 2.25 21,030 -2.80 0.0169
2025-08-12 2025-06-30 13F MOSAIC COM 61945C103 593,064 -13,719 -2.26 21,635 32.00 0.0185
2025-05-29 2025-03-31 13F/A-1 MOSAIC COM 61945C103 606,783 35,115 6.14 16,389 16.64 0.0153
2025-04-08 2025-03-31 13F MOSAIC COM 61945C103 606,783 35,115 16,389 0.0153
2025-05-29 2024-12-31 13F/A-1 MOSAIC COM 61945C103 571,668 -6,157 -1.07 14,052 -9.20 0.0126
2025-01-30 2024-12-31 13F MOSAIC COM 61945C103 571,668 -6,157 14,052 0.0126
2024-11-12 2024-09-30 13F MOSAIC COM 61945C103 577,825 -27,669 -4.57 15,474 -11.57 0.0140
2024-08-01 2024-06-30 13F MOSAIC COM 61945C103 605,494 -18,737 -3.00 17,499 -13.64 0.0164
2024-05-09 2024-03-31 13F MOSAIC COM 61945C103 624,231 -11,157 -1.76 20,262 -10.75 0.0195
2024-02-08 2023-12-31 13F MOSAIC COM 61945C103 635,388 1,580 0.25 22,702 0.62 0.0238
2023-11-09 2023-09-30 13F MOSAIC COM 61945C103 633,808 -23,508 -3.58 22,563 -1.93 0.0262
2023-08-08 2023-06-30 13F MOSAIC COM 61945C103 657,316 -6,690 -1.01 23,006 76,586.67 0.0258
2023-05-11 2023-03-31 13F MOSAIC COM 61945C103 664,006 7,391 1.13 30 -99.90 0.0376
2023-02-14 2022-12-31 13F MOSAIC COM 61945C103 656,615 -14,925 -2.22 28,806 -11.25 0.0387
2022-11-10 2022-09-30 13F MOSAIC COM 61945C103 671,540 -33,097 -4.70 32,456 -2.48 0.0483
2022-08-11 2022-06-30 13F MOSAIC COM 61945C103 704,637 126,513 21.88 33,280 -13.43 0.0486
2022-05-12 2022-03-31 13F MOSAIC COM 61945C103 578,124 -44,044 -7.08 38,445 57.27 0.0495
2022-02-10 2021-12-31 13F MOSAIC COM 61945C103 622,168 36,619 6.25 24,445 16.87 0.0300
2021-11-12 2021-09-30 13F MOSAIC COM 61945C103 585,549 -8,328 -1.40 20,916 10.37 0.0283
2021-08-05 2021-06-30 13F MOSAIC COM 61945C103 593,877 -10,309 -1.71 18,951 -0.77 0.0249
2021-05-06 2021-03-31 13F MOSAIC COM 61945C103 604,186 -28,626 -4.52 19,098 31.16 0.0259
2021-02-10 2020-12-31 13F MOSAIC COM 61945C103 632,812 6,757 1.08 14,561 27.30 0.0201
2020-11-12 2020-09-30 13F MOSAIC COM 61945C103 626,055 -2,597 -0.41 11,438 45.45 0.0179
2020-08-13 2020-06-30 13F MOSAIC COM 61945C103 628,652 -76,294 -10.82 7,864 3.09 0.0131
2020-05-06 2020-03-31 13F MOSAIC COM 61945C103 704,946 70,416 11.10 7,628 -44.45 0.0160
2020-02-05 2019-12-31 13F MOSAIC COM 61945C103 634,530 67,979 12.00 13,731 18.23 0.0230
2019-10-23 2019-09-30 13F MOSAIC COM 61945C103 566,551 -3,109 -0.55 11,614 -18.55 0.0212
2019-08-14 2019-06-30 13F MOSAIC COM 61945C103 569,660 -48,791 -7.89 14,259 -15.58 0.0268
2019-05-01 2019-03-31 13F MOSAIC COM 61945C103 618,451 -56,113 -8.32 16,890 -14.28 0.0327
2019-01-31 2018-12-31 13F MOSAIC COM 61945C103 674,564 26,841 4.14 19,704 -6.34 0.0429
2018-11-07 2018-09-30 13F MOSAIC COM 61945C103 647,723 -3,240 -0.50 21,038 15.21 0.0406
2018-08-06 2018-06-30 13F MOSAIC COM 61945C103 650,963 18,538 2.93 18,260 18.92 0.0368
2018-05-02 2018-03-31 13F MOSAIC COM 61945C103 632,425 -3,131 -0.49 15,355 -5.84 0.0321
2018-02-09 2017-12-31 13F MOSAIC COM 61945C103 635,556 5,665 0.90 16,308 19.92 0.0331
2017-11-06 2017-09-30 13F MOSAIC COM 61945C103 629,891 11,561 1.87 13,599 -3.66 0.0296
2017-08-02 2017-06-30 13F MOSAIC COM 61945C103 618,330 577 0.09 14,116 -21.69 0.0322
2017-05-02 2017-03-31 13F MOSAIC COM 61945C103 617,753 22,340 3.75 18,026 3.22 0.0421
2017-01-27 2016-12-31 13F MOSAIC COM 61945C103 595,413 84,393 16.51 17,463 39.70 0.0443
2016-11-08 2016-09-30 13F MOSAIC COM 61945C103 511,020 26,107 5.38 12,500 -1.54 0.0344
2016-08-11 2016-06-30 13F MOSAIC COM 61945C103 484,913 39,005 8.75 12,695 5.44 0.0376
2016-05-02 2016-03-31 13F MOSAIC COM 61945C103 445,908 19,193 4.50 12,040 2.27 0.0374
2016-02-03 2015-12-31 13F MOSAIC COM 61945C103 426,715 4,689 1.11 11,773 -10.33 0.0379
2015-11-04 2015-09-30 13F MOSAIC COM 61945C103 422,026 19,290 4.79 13,129 -30.42 0.0447
2015-08-04 2015-06-30 13F MOSAIC COM 61945C103 402,736 -3,690 -0.91 18,868 0.79 0.0601
2015-05-12 2015-03-31 13F MOSAIC COM 61945C103 406,426 -4,735 -1.15 18,720 -0.26 0.0540
2015-02-06 2014-12-31 13F MOSAIC COM 61945C103 411,161 -3,185 -0.77 18,769 2.00 0.0545
2014-11-12 2014-09-30 13F MOSAIC COM 61945C103 414,346 -16,364 -3.80 18,401 -13.61 0.0553
2014-08-06 2014-06-30 13F MOSAIC COM 61945C103 430,710 -83,170 -16.18 21,299 -17.11 0.0625
2014-05-06 2014-03-31 13F MOSAIC COM 61945C103 513,880 -11,130 -2.12 25,694 3.53 0.0762
2014-02-03 2013-12-31 13F MOSAIC COM 61945C103 525,010 -9,922 -1.85 24,817 7.84 0.0732
2013-11-05 2013-09-30 13F MOSAIC COM 61945C103 534,932 19,713 3.83 23,013 -16.99 0.0713
2013-08-07 2013-06-30 13F MOSAIC COM 61945C103 515,219 515,219 27,724 0.0891
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.