MP Materials Corp.
MX ˙ BMV ˙ US5533681012
SecurityMX:MP / MP Materials Corp.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership2,206 shares
Latest Disclosed Value $ 106,462
Walleye Capital LLC ownership in MP / MP Materials Corp.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 2,206 shares of MP Materials Corp. (MX:MP) valued at $106,462 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 204,107 shares of MP Materials Corp.. This represents a change in shares of -98.92% during the quarter.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (MP) in the form of stock options. The firm currently holds call options representing 55,700 of underlying shares valued at $2,688,082 USD and put options representing 45,500 of underlying shares valued at $2,195,830 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.

MX:MP / MP Materials Corp. 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)
2026-05-13 2026-03-31 13F/A-1 MP MATERIALS COM CL A 553368101 2,206 -201,901 -98.92 106 -98.97 0.0004
2026-05-08 2026-03-31 13F MP MATERIALS COM CL A 553368101 2,206 -201,901 106 0.0004
2026-02-13 2025-12-31 13F MP MATERIALS COM CL A 553368101 204,107 129,978 175.34 10,311 107.42 0.0316
2025-11-14 2025-09-30 13F MP MATERIALS COM CL A 553368101 74,129 -18,735 -20.17 4,972 60.93 0.0187
2025-08-13 2025-06-30 13F MP MATERIALS COM CL A 553368101 92,864 67,015 259.26 3,090 390.32 0.0120
2025-05-14 2025-03-31 13F MP MATERIALS COM CL A 553368101 25,849 2,466 10.55 631 73.08 0.0028
2025-02-13 2024-12-31 13F MP MATERIALS COM CL A 553368101 23,383 -10,070 -30.10 365 -38.31 0.0009
2024-11-14 2024-09-30 13F MP MATERIALS COM CL A 553368101 33,453 -45,581 -57.67 590 -41.35 0.0012
2024-08-14 2024-06-30 13F MP MATERIALS COM CL A 553368101 79,034 -88,780 -52.90 1,006 -58.07 0.0018
2024-05-15 2024-03-31 13F MP MATERIALS COM CL A 553368101 167,814 86,966 107.57 2,400 49.56 0.0043
2024-02-14 2023-12-31 13F MP MATERIALS COM CL A 553368101 80,848 -62,968 -43.78 1,605 -41.59 0.0034
2023-11-21 2023-09-30 13F/A-1 MP MATERIALS COM CL A 553368101 143,816 107,394 294.86 2,747 229.65 0.0070
2023-11-14 2023-09-30 13F MP MATERIALS COM CL A 553368101 143,816 107,394 2,747 0.0071
2023-08-14 2023-06-30 13F MP MATERIALS COM CL A 553368101 36,422 36,422 833 0.0030
2023-05-15 2023-03-31 13F MP MATERIALS COM CL A 553368101 0 -15,334 -100.00 0 -100.00
2023-02-14 2022-12-31 13F MP MATERIALS COM CL A 553368101 15,334 -16,942 -52.49 372 -57.78 0.0068
2022-11-14 2022-09-30 13F MP MATERIALS COM CL A 553368101 32,276 22,983 247.32 881 195.64 0.0168
2022-08-19 2022-06-30 13F/A-1 MP MATERIALS COM CL A 553368101 9,293 -15,911 -63.13 298 -79.38 0.0082
2022-08-08 2022-06-30 13F MP MATERIALS COM CL A 553368101 9,293 -15,911 298 0.0082
2022-05-27 2022-03-31 13F/A-01 MP MATERIALS COM CL A 553368101 25,204 6,523 34.92 1,445 70.40 0.0386
2022-05-16 2022-03-31 13F MP MATERIALS COM CL A 553368101 25,204 6,523 1,445 0.0294
2022-05-27 2021-12-31 13F/A-01 MP MATERIALS COM CL A 553368101 18,681 18,681 848 0.0263
2022-03-03 2021-12-31 13F MP MATERIALS COM CL A 553368101 18,681 18,681 848 0.0212
2021-11-15 2021-09-30 13F MP MATERIALS COM CL A 553368101 0 -53,199 -100.00 0 -100.00
2021-08-16 2021-06-30 13F MP MATERIALS COM CL A 553368101 53,199 53,199 1,961 0.0668
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
(%)
2026-05-13 2026-03-31 13F/A MP MATERIALS COM CL A Call 55,700 -68.46 2,688 -69.87 n/a n/a n/a
2026-05-08 2026-03-31 13F MP MATERIALS COM CL A Call 55,700 2,688 n/a n/a n/a
2026-02-13 2025-12-31 13F MP MATERIALS COM CL A Call 176,600 131.76 8,922 74.58 n/a n/a n/a
2025-11-14 2025-09-30 13F MP MATERIALS COM CL A Call 76,200 -73.19 5,111 -45.95 n/a n/a n/a
2025-08-13 2025-06-30 13F MP MATERIALS COM CL A Call 284,200 432.21 9,455 625.63 n/a n/a n/a
2025-05-14 2025-03-31 13F MP MATERIALS COM CL A Call 53,400 196.67 1,303 365.36 n/a n/a n/a
2025-02-13 2024-12-31 13F MP MATERIALS COM CL A Call 18,000 -35.94 281 -43.43 n/a n/a n/a
2024-11-14 2024-09-30 13F MP MATERIALS COM CL A Call 28,100 119.53 496 205.56 n/a n/a n/a
2024-08-14 2024-06-30 13F MP MATERIALS COM CL A Call 12,800 -71.30 163 -74.57 n/a n/a n/a
2024-05-15 2024-03-31 13F MP MATERIALS COM CL A Call 44,600 -25.54 638 -46.43 n/a n/a n/a
2024-02-14 2023-12-31 13F MP MATERIALS COM CL A Call 59,900 390.98 1,189 410.30 n/a n/a n/a
2023-11-21 2023-09-30 13F/A MP MATERIALS COM CL A Call 12,200 46.99 233 23.28 n/a n/a n/a
2023-11-14 2023-09-30 13F MP MATERIALS COM CL A Call 12,200 233 n/a n/a n/a
2023-08-14 2023-06-30 13F MP MATERIALS COM CL A Call 8,300 -50.30 190 -59.79 n/a n/a n/a
2023-05-15 2023-03-31 13F MP MATERIALS COM CL A Call 16,700 77.66 471 106.14 n/a n/a n/a
2023-02-14 2022-12-31 13F MP MATERIALS COM CL A Call 9,400 141.03 228 115.09 n/a n/a n/a
2022-11-14 2022-09-30 13F MP MATERIALS COM CL A Call 3,900 106 n/a n/a n/a
2021-05-17 2021-03-31 13F MP MATERIALS COM CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-16 2020-12-31 13F MP MATERIALS COM CL A Call 45,000 1,448 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
(%)
2026-05-13 2026-03-31 13F/A MP MATERIALS COM CL A Put 45,500 -72.10 2,196 -73.36 n/a n/a n/a
2026-05-08 2026-03-31 13F MP MATERIALS COM CL A Put 45,500 2,196 n/a n/a n/a
2026-02-13 2025-12-31 13F MP MATERIALS COM CL A Put 163,100 -29.70 8,240 -47.05 n/a n/a n/a
2025-11-14 2025-09-30 13F MP MATERIALS COM CL A Put 232,000 20.33 15,560 142.59 n/a n/a n/a
2025-08-13 2025-06-30 13F MP MATERIALS COM CL A Put 192,800 96.73 6,414 168.14 n/a n/a n/a
2025-05-14 2025-03-31 13F MP MATERIALS COM CL A Put 98,000 19.80 2,392 87.46 n/a n/a n/a
2025-02-13 2024-12-31 13F MP MATERIALS COM CL A Put 81,800 -52.47 1,276 -57.98 n/a n/a n/a
2024-11-14 2024-09-30 13F MP MATERIALS COM CL A Put 172,100 128.86 3,038 217.35 n/a n/a n/a
2024-08-14 2024-06-30 13F MP MATERIALS COM CL A Put 75,200 -53.18 957 -58.32 n/a n/a n/a
2024-05-15 2024-03-31 13F MP MATERIALS COM CL A Put 160,600 -14.53 2,297 -38.43 n/a n/a n/a
2024-02-14 2023-12-31 13F MP MATERIALS COM CL A Put 187,900 9.37 3,730 13.65 n/a n/a n/a
2023-11-21 2023-09-30 13F/A MP MATERIALS COM CL A Put 171,800 188.26 3,281 140.72 n/a n/a n/a
2023-11-14 2023-09-30 13F MP MATERIALS COM CL A Put 171,800 3,281 n/a n/a n/a
2023-08-14 2023-06-30 13F MP MATERIALS COM CL A Put 59,600 282.05 1,364 210.48 n/a n/a n/a
2023-05-15 2023-03-31 13F MP MATERIALS COM CL A Put 15,600 13.04 440 31.04 n/a n/a n/a
2023-02-14 2022-12-31 13F MP MATERIALS COM CL A Put 13,800 335 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.