The Mosaic Company
US ˙ NYSE ˙ US61945C1036

SecurityMOS / The Mosaic Company
InstitutionSimplex Trading, Llc
Latest Disclosed Ownership181,811 shares
Latest Disclosed Value $ 4,636,180
Simplex Trading, Llc ownership in MOS / The Mosaic Company

On May 14, 2026 - Simplex Trading, Llc filed a 13F-HR form disclosing ownership of 181,811 shares of The Mosaic Company (US:MOS) valued at $4,636,180 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 12, 2025 disclosing 0 shares of The Mosaic Company. The current value of the position is $4,236,196 USD.

Simplex Trading, Llc has a history of taking positions in derivatives of the underlying security (MOS) in the form of stock options. The firm currently holds call options representing 347,600 of underlying shares valued at $8,863,800 USD and put options representing 480,500 of underlying shares valued at $12,252,750 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MOS / The Mosaic Company Historical Put/Call Ratio
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)
2026-05-14 2026-03-31 13F MOSAIC COM 61945C103 181,811 181,811 4,636 0.0015
2025-11-12 2025-09-30 13F MOSAIC CO COM 61945C103 0 -60,217 -100.00 0 -100.00
2025-08-05 2025-06-30 13F MOSAIC CO COM 61945C103 60,217 18,084 42.92 2 100.00 0.0013
2025-05-12 2025-03-31 13F MOSAIC CO COM 61945C103 42,133 -64,919 -60.64 1 -50.00 0.0007
2025-02-11 2024-12-31 13F MOSAIC CO COM 61945C103 107,052 36,245 51.19 3 100.00 0.0015
2024-11-08 2024-09-30 13F MOSAIC CO COM 61945C103 70,807 21,771 44.40 2 0.00 0.0011
2024-07-25 2024-06-30 13F MOSAIC CO COM 61945C103 49,036 49,036 1 0.0009
2024-02-02 2023-12-31 13F MOSAIC CO COM 61945C103 0 -106,910 -100.00 0 -100.00
2023-11-01 2023-09-30 13F MOSAIC CO COM 61945C103 106,910 -24,054 -18.37 4 -25.00 0.0030
2023-08-04 2023-06-30 13F MOSAIC CO COM 61945C103 130,964 48,780 59.35 5 33.33 0.0038
2023-04-27 2023-03-31 13F MOSAIC CO COM 61945C103 82,184 71,589 675.69 4 0.0033
2023-02-02 2022-12-31 13F MOSAIC CO COM 61945C103 10,595 10,595 0 0.0005
2022-11-04 2022-09-30 13F MOSAIC CO COM 61945C103 0 -106,957 -100.00 0 -100.00
2022-08-03 2022-06-30 13F MOSAIC CO COM 61945C103 106,957 102,794 2,469.23 5,051 1,730.07 0.0054
2022-05-02 2022-03-31 13F MOSAIC CO COM 61945C103 4,163 1,459 53.96 276 160.38 0.0003
2022-02-23 2021-12-31 13F/A-1 MOSAIC CO COM 61945C103 2,704 -161,639 -98.35 106 -97.97 0.0001
2022-02-04 2021-12-31 13F MOSAIC CO COM 61945C103 164,343 0 5,224 0.0049
2021-10-28 2021-09-30 13F MOSAIC CO COM 61945C103 164,343 51,379 45.48 5,224 44.95 0.0049
2021-08-12 2021-06-30 13F MOSAIC CO COM 61945C103 112,964 6,309 5.92 3,604 0.0035
2021-04-26 2021-03-31 13F MOSAIC CO COM 61945C103 106,655 49,891 87.89 0 -100.00
2021-02-02 2020-12-31 13F MOSAIC CO COM 61945C103 56,764 38,047 203.28 1,306 282.99 0.0017
2020-10-14 2020-09-30 13F MOSAIC CO COM 61945C103 18,717 -113,433 -85.84 341 -79.37 0.0005
2020-07-13 2020-06-30 13F MOSAIC CO COM 61945C103 132,150 125,430 1,866.52 1,653 2,195.83 0.0026
2020-04-29 2020-03-31 13F MOSAIC CO COM 61945C103 6,720 -32,040 -82.66 72 -91.41 0.0001
2020-02-05 2019-12-31 13F MOSAIC CO COM 61945C103 38,760 7,378 23.51 838 30.33 0.0018
2019-10-15 2019-09-30 13F MOSAIC CO COM 61945C103 31,382 31,382 -19.04 643 -23.27 0.0018
2019-07-26 2019-06-30 13F MOSAIC CO COM 61945C103 0 -26,444 -100.00 0 -100.00
2019-04-18 2019-03-31 13F MOSAIC CO COM 61945C103 26,444 5,826 28.26 722 19.93 0.0020
2019-01-16 2018-12-31 13F MOSAIC CO COM 61945C103 20,618 20,618 -22.03 602 -16.62 0.0018
2018-07-30 2018-06-30 13F MOSAIC CO COM 61945C103 0 -22,161 -100.00 0 -100.00
2018-04-26 2018-03-31 13F MOSAIC CO COM 61945C103 22,161 -18,492 -45.49 538 -48.42 0.0237
2018-01-10 2017-12-31 13F MOSAIC CO COM 61945C103 40,653 -33,607 -45.26 1,043 -34.93 0.0449
2017-10-25 2017-09-30 13F MOSAIC CO COM 61945C103 74,260 -28,113 -27.46 1,603 -31.41 0.0655
2017-07-12 2017-06-30 13F MOSAIC CO COM 61945C103 102,373 102,373 37.86 2,337 45.79 0.1015
2017-04-21 2017-03-31 13F MOSAIC CO COM 61945C103 0 -20,882 -100.00 0 -100.00
2017-01-11 2016-12-31 13F MOSAIC CO COM 61945C103 20,882 -114,931 -84.62 612 -81.57 0.0366
2016-10-07 2016-09-30 13F MOSAIC CO COM 61945C103 135,813 76,912 130.58 3,321 115.37 0.2251
2016-07-18 2016-06-30 13F MOSAIC CO COM 61945C103 58,901 58,901 -56.63 1,542 -53.57 0.1031
2016-04-14 2016-03-31 13F MOSAIC CO COM 61945C103 0 -26,342 -100.00 0 -100.00
2016-01-20 2015-12-31 13F MOSAIC CO COM 61945C103 26,342 4,391 20.00 726 6.45 0.0568
2015-10-08 2015-09-30 13F MOSAIC CO COM 61945C103 21,951 -14,005 -38.95 682 -59.50 0.0500
2015-07-08 2015-06-30 13F MOSAIC CO COM 61945C103 35,956 12,978 56.48 1,684 59.17 0.1411
2015-04-21 2015-03-31 13F MOSAIC CO COM 61945C103 22,978 20,468 815.46 1,058 820.00 0.1230
2015-03-04 2014-12-31 13F MOSAIC CO COM 61945C103 2,510 2,510 115 0.0139
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F MOSAIC CALL Call 347,600 9.72 8,864 16.14 n/a n/a n/a
2026-02-11 2025-12-31 13F MOSAIC CO CALL Call 316,800 -14.38 7,632 63,491.67 n/a n/a n/a
2025-11-12 2025-09-30 13F MOSAIC CO CALL Call 370,000 4.85 13 0.00 n/a n/a n/a
2025-08-05 2025-06-30 13F MOSAIC CO CALL Call 352,900 29.93 13 71.43 n/a n/a n/a
2025-05-12 2025-03-31 13F MOSAIC CO CALL Call 271,600 15.33 7 40.00 n/a n/a n/a
2025-02-11 2024-12-31 13F MOSAIC CO CALL Call 235,500 -30.30 6 -44.44 n/a n/a n/a
2024-11-08 2024-09-30 13F MOSAIC CO CALL Call 337,900 36.36 9 28.57 n/a n/a n/a
2024-07-25 2024-06-30 13F MOSAIC CO CALL Call 247,800 -32.57 7 -36.36 n/a n/a n/a
2024-04-25 2024-03-31 13F MOSAIC CO CALL Call 367,500 -35.95 12 -45.00 n/a n/a n/a
2024-02-02 2023-12-31 13F MOSAIC CO CALL Call 573,800 -2.84 21 0.00 n/a n/a n/a
2023-11-01 2023-09-30 13F MOSAIC CO CALL Call 590,600 -23.88 21 -23.08 n/a n/a n/a
2023-08-04 2023-06-30 13F MOSAIC CO CALL Call 775,900 29.51 27 -3.70 n/a n/a n/a
2023-04-27 2023-03-31 13F MOSAIC CO CALL Call 599,100 101.99 27 107.69 n/a n/a n/a
2023-02-02 2022-12-31 13F MOSAIC CO CALL Call 296,600 -39.81 13 -99.95 n/a n/a n/a
2022-11-04 2022-09-30 13F MOSAIC CO CALL Call 492,800 -30.91 23,817 -29.30 n/a n/a n/a
2022-08-03 2022-06-30 13F MOSAIC CO CALL Call 713,300 30.21 33,689 -7.52 n/a n/a n/a
2022-05-02 2022-03-31 13F MOSAIC CO CALL Call 547,800 -40.13 36,428 1.33 n/a n/a n/a
2022-02-23 2021-12-31 13F/A MOSAIC CO CALL Call 915,000 221.05 35,950 296.80 n/a n/a n/a
2022-02-04 2021-12-31 13F MOSAIC CO CALL Call 285,000 9,060 n/a n/a n/a
2021-10-28 2021-09-30 13F MOSAIC CO CALL Call 285,000 13.59 9,060 13.17 n/a n/a n/a
2021-08-12 2021-06-30 13F MOSAIC CO CALL Call 250,900 9,189.15 8,006 n/a n/a n/a
2021-04-26 2021-03-31 13F MOSAIC CO CALL Call 2,701 45.22 0 -100.00 n/a n/a n/a
2021-02-02 2020-12-31 13F MOSAIC CO CALL Call 1,860 -32.88 4,279 -15.47 n/a n/a n/a
2020-10-14 2020-09-30 13F MOSAIC CO CALL Call 2,771 6.95 5,062 56.19 n/a n/a n/a
2020-07-13 2020-06-30 13F MOSAIC CO CALL Call 2,591 27.51 3,241 47.45 n/a n/a n/a
2020-04-29 2020-03-31 13F MOSAIC CO CALL Call 2,032 60.25 2,198 -19.87 n/a n/a n/a
2020-02-05 2019-12-31 13F MOSAIC CO CALL Call 1,268 9.97 2,743 16.08 n/a n/a n/a
2019-10-15 2019-09-30 13F MOSAIC CO CALL Call 1,153 -37.13 2,363 -48.52 n/a n/a n/a
2019-07-26 2019-06-30 13F MOSAIC CO CALL Call 1,834 225.75 4,590 198.63 n/a n/a n/a
2019-04-18 2019-03-31 13F MOSAIC CO CALL Call 563 -22.88 1,537 -27.91 n/a n/a n/a
2019-01-16 2018-12-31 13F MOSAIC CO CALL Call 730 15.51 2,132 3.90 n/a n/a n/a
2018-10-23 2018-09-30 13F MOSAIC CO CALL Call 632 13.46 2,052 31.37 n/a n/a n/a
2018-07-30 2018-06-30 13F MOSAIC CO CALL Call 557 -3.13 1,562 6,148.00 n/a n/a n/a
2018-04-26 2018-03-31 13F MOSAIC CO CALL Call 575 -26.38 25 -87.92 n/a n/a n/a
2018-01-10 2017-12-31 13F MOSAIC CO CALL Call 781 150.32 207 417.50 n/a n/a n/a
2017-10-25 2017-09-30 13F MOSAIC CO CALL Call 312 -40.34 40 -2.44 n/a n/a n/a
2017-07-12 2017-06-30 13F MOSAIC CO CALL Call 523 -68.68 41 -81.78 n/a n/a n/a
2017-04-21 2017-03-31 13F MOSAIC CO CALL Call 1,670 26.61 225 -15.73 n/a n/a n/a
2017-01-11 2016-12-31 13F MOSAIC CO CALL Call 1,319 -5.38 267 413.46 n/a n/a n/a
2016-10-07 2016-09-30 13F MOSAIC CO CALL Call 1,394 -13.36 52 -73.33 n/a n/a n/a
2016-07-18 2016-06-30 13F MOSAIC CO CALL Call 1,609 168.17 195 78.90 n/a n/a n/a
2016-04-14 2016-03-31 13F MOSAIC CO CALL Call 600 57.89 109 165.85 n/a n/a n/a
2016-01-20 2015-12-31 13F MOSAIC CO CALL Call 380 23.78 41 215.38 n/a n/a n/a
2015-10-08 2015-09-30 13F MOSAIC CO CALL Call 307 96.79 13 -43.48 n/a n/a n/a
2015-07-08 2015-06-30 13F MOSAIC CO CALL Call 156 129.41 23 53.33 n/a n/a n/a
2015-04-21 2015-03-31 13F MOSAIC CO CALL Call 68 74.36 15 7.14 n/a n/a n/a
2015-03-04 2014-12-31 13F MOSAIC CO CALL Call 39 14 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F MOSAIC PUT Put 480,500 91.05 12,253 102.24 n/a n/a n/a
2026-02-11 2025-12-31 13F MOSAIC CO PUT Put 251,500 10.99 6,059 86,442.86 n/a n/a n/a
2025-11-12 2025-09-30 13F MOSAIC CO PUT Put 226,600 -65.12 8 -69.57 n/a n/a n/a
2025-08-05 2025-06-30 13F MOSAIC CO PUT Put 649,700 218.48 24 360.00 n/a n/a n/a
2025-05-12 2025-03-31 13F MOSAIC CO PUT Put 204,000 -63.36 6 -61.54 n/a n/a n/a
2025-02-11 2024-12-31 13F MOSAIC CO PUT Put 556,700 18.47 14 8.33 n/a n/a n/a
2024-11-08 2024-09-30 13F MOSAIC CO PUT Put 469,900 -17.99 13 -25.00 n/a n/a n/a
2024-07-25 2024-06-30 13F MOSAIC CO PUT Put 573,000 38.51 17 23.08 n/a n/a n/a
2024-04-25 2024-03-31 13F MOSAIC CO PUT Put 413,700 -9.81 13 -18.75 n/a n/a n/a
2024-02-02 2023-12-31 13F MOSAIC CO PUT Put 458,700 12.62 16 14.29 n/a n/a n/a
2023-11-01 2023-09-30 13F MOSAIC CO PUT Put 407,300 -42.96 14 -41.67 n/a n/a n/a
2023-08-04 2023-06-30 13F MOSAIC CO PUT Put 714,000 54.45 25 14.29 n/a n/a n/a
2023-04-27 2023-03-31 13F MOSAIC CO PUT Put 462,300 -40.59 21 -38.24 n/a n/a n/a
2023-02-02 2022-12-31 13F MOSAIC CO PUT Put 778,200 19.58 34 -99.89 n/a n/a n/a
2022-11-04 2022-09-30 13F MOSAIC CO PUT Put 650,800 -27.66 31,453 -25.97 n/a n/a n/a
2022-08-03 2022-06-30 13F MOSAIC CO PUT Put 899,600 44.40 42,488 2.56 n/a n/a n/a
2022-05-02 2022-03-31 13F MOSAIC CO PUT Put 623,000 76.24 41,429 198.29 n/a n/a n/a
2022-02-23 2021-12-31 13F/A MOSAIC CO PUT Put 353,500 -25.45 13,889 -7.86 n/a n/a n/a
2022-02-04 2021-12-31 13F MOSAIC CO PUT Put 474,200 15,074 n/a n/a n/a
2021-10-28 2021-09-30 13F MOSAIC CO PUT Put 474,200 3.40 15,074 3.01 n/a n/a n/a
2021-08-12 2021-06-30 13F MOSAIC CO PUT Put 458,600 16,372.70 14,633 n/a n/a n/a
2021-04-26 2021-03-31 13F MOSAIC CO PUT Put 2,784 3.49 0 -100.00 n/a n/a n/a
2021-02-02 2020-12-31 13F MOSAIC CO PUT Put 2,690 43.70 6,189 80.96 n/a n/a n/a
2020-10-14 2020-09-30 13F MOSAIC CO PUT Put 1,872 -21.18 3,420 15.11 n/a n/a n/a
2020-07-13 2020-06-30 13F MOSAIC CO PUT Put 2,375 280.61 2,971 340.15 n/a n/a n/a
2020-04-29 2020-03-31 13F MOSAIC CO PUT Put 624 -22.68 675 -61.34 n/a n/a n/a
2020-02-05 2019-12-31 13F MOSAIC CO PUT Put 807 15.78 1,746 22.27 n/a n/a n/a
2019-10-15 2019-09-30 13F MOSAIC CO PUT Put 697 -34.12 1,428 -46.07 n/a n/a n/a
2019-07-26 2019-06-30 13F MOSAIC CO PUT Put 1,058 -25.49 2,648 -31.72 n/a n/a n/a
2019-04-18 2019-03-31 13F MOSAIC CO PUT Put 1,420 195.22 3,878 176.01 n/a n/a n/a
2019-01-16 2018-12-31 13F MOSAIC CO PUT Put 481 53.67 1,405 38.29 n/a n/a n/a
2018-10-23 2018-09-30 13F MOSAIC CO PUT Put 313 25.70 1,016 45.56 n/a n/a n/a
2018-07-30 2018-06-30 13F MOSAIC CO PUT Put 249 -60.10 698 462.90 n/a n/a n/a
2018-04-26 2018-03-31 13F MOSAIC CO PUT Put 624 -45.64 124 -58.80 n/a n/a n/a
2018-01-10 2017-12-31 13F MOSAIC CO PUT Put 1,148 -6.97 301 -57.49 n/a n/a n/a
2017-10-25 2017-09-30 13F MOSAIC CO PUT Put 1,234 -22.34 708 -11.61 n/a n/a n/a
2017-07-12 2017-06-30 13F MOSAIC CO PUT Put 1,589 -36.08 801 87.15 n/a n/a n/a
2017-04-21 2017-03-31 13F MOSAIC CO PUT Put 2,486 81.99 428 28.53 n/a n/a n/a
2017-01-11 2016-12-31 13F MOSAIC CO PUT Put 1,366 -63.97 333 -67.35 n/a n/a n/a
2016-10-07 2016-09-30 13F MOSAIC CO PUT Put 3,791 5.28 1,020 2.82 n/a n/a n/a
2016-07-18 2016-06-30 13F MOSAIC CO PUT Put 3,601 720.27 992 308.23 n/a n/a n/a
2016-04-14 2016-03-31 13F MOSAIC CO PUT Put 439 -46.46 243 -38.94 n/a n/a n/a
2016-01-20 2015-12-31 13F MOSAIC CO PUT Put 820 64.00 398 23.22 n/a n/a n/a
2015-10-08 2015-09-30 13F MOSAIC CO PUT Put 500 461.80 323 651.16 n/a n/a n/a
2015-07-08 2015-06-30 13F MOSAIC CO PUT Put 89 -78.45 43 -66.41 n/a n/a n/a
2015-04-21 2015-03-31 13F MOSAIC CO PUT Put 413 241.32 128 66.23 n/a n/a n/a
2015-03-04 2014-12-31 13F MOSAIC CO PUT Put 121 77 n/a n/a n/a
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.