MP Materials Corp.
MX ˙ BMV ˙ US5533681012
SecurityMX:MP / MP Materials Corp.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership105,474 shares
Latest Disclosed Value $ 5,090,175
Millennium Management Llc ownership in MP / MP Materials Corp.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 105,474 shares of MP Materials Corp. (MX:MP) valued at $5,090,175 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 542,372 shares of MP Materials Corp.. This represents a change in shares of -80.55% during the quarter.

Millennium Management 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 57,800 of underlying shares valued at $2,789,428 USD and put options representing 170,800 of underlying shares valued at $8,242,808 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)
2026-05-15 2026-03-31 13F MP MATERIALS COM CL A 553368101 105,474 -436,898 -80.55 5,090 -81.42 0.0021
2026-02-17 2025-12-31 13F MP MATERIALS COM CL A 553368101 542,372 7,744 1.45 27,401 -23.59 0.0115
2025-11-14 2025-09-30 13F MP MATERIALS COM CL A 553368101 534,628 534,628 35,858 0.0153
2025-08-14 2025-06-30 13F MP MATERIALS COM CL A 553368101 0 -112,934 -100.00 0 -100.00
2025-05-15 2025-03-31 13F MP MATERIALS COM CL A 553368101 112,934 12,967 12.97 2,757 76.78 0.0015
2025-02-14 2024-12-31 13F MP MATERIALS COM CL A 553368101 99,967 -201,960 -66.89 1,559 -70.74 0.0008
2024-11-14 2024-09-30 13F MP MATERIALS COM CL A 553368101 301,927 -499,401 -62.32 5,329 -47.75 0.0025
2024-08-14 2024-06-30 13F MP MATERIALS COM CL A 553368101 801,328 648,838 425.50 10,201 367.89 0.0047
2024-05-15 2024-03-31 13F MP MATERIALS COM CL A 553368101 152,490 66,464 77.26 2,181 27.71 0.0009
2024-02-14 2023-12-31 13F MP MATERIALS COM CL A 553368101 86,026 -31,210 -26.62 1,708 -23.76 0.0007
2023-11-14 2023-09-30 13F MP MATERIALS COM CL A 553368101 117,236 117,236 2,239 0.0011
2023-08-14 2023-06-30 13F MP MATERIALS COM CL A 553368101 0 -121,075 -100.00 0 -100.00
2023-05-15 2023-03-31 13F MP MATERIALS COM CL A 553368101 121,075 -55,315 -31.36 3,413 -20.31 0.0020
2023-02-14 2022-12-31 13F MP MATERIALS COM CL A 553368101 176,390 119,048 207.61 4,283 173.67 0.0024
2022-11-14 2022-09-30 13F MP MATERIALS COM CL A 553368101 57,342 -519,135 -90.05 1,565 -91.54 0.0009
2022-08-15 2022-06-30 13F MP MATERIALS COM CL A 553368101 576,477 492,184 583.90 18,493 282.64 0.0115
2022-05-16 2022-03-31 13F MP MATERIALS COM CL A 553368101 84,293 65,762 354.88 4,833 473.99 0.0026
2022-02-14 2021-12-31 13F MP MATERIALS COM CL A 553368101 18,531 -86,242 -82.31 842 -75.07 0.0004
2021-11-15 2021-09-30 13F MP MATERIALS COM CL A 553368101 104,773 104,773 3,377 0.0020
2021-08-16 2021-06-30 13F MP MATERIALS COM CL A 553368101 0 -19,828 -100.00 0 -100.00
2021-05-17 2021-03-31 13F MP MATERIALS COM CL A 553368101 19,828 -1,005,781 -98.07 713 -97.84 0.0005
2021-02-16 2020-12-31 13F MP MATERIALS COM CL A 553368101 1,025,609 1,025,609 32,994 0.0238
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
(%)
2026-05-15 2026-03-31 13F MP MATERIALS COM CL A Call 57,800 -44.05 2,789 -46.55 n/a n/a n/a
2026-02-17 2025-12-31 13F MP MATERIALS COM CL A Call 103,300 5,219 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
(%)
2026-05-15 2026-03-31 13F MP MATERIALS COM CL A Put 170,800 18.36 8,243 13.06 n/a n/a n/a
2026-02-17 2025-12-31 13F MP MATERIALS COM CL A Put 144,300 7,290 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.