MP Materials Corp.
MX ˙ BMV ˙ US5533681012
SecurityMX:MP / MP Materials Corp.
InstitutionCitigroup Inc
Latest Disclosed Ownership568,593 shares
Latest Disclosed Value $ 27,440,299
Citigroup Inc ownership in MP / MP Materials Corp.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 568,593 shares of MP Materials Corp. (MX:MP) valued at $27,440,299 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 950,958 shares of MP Materials Corp.. This represents a change in shares of -40.21% during the quarter.

Citigroup Inc 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 112,000 of underlying shares valued at $5,405,120 USD and put options representing 0 of underlying shares valued at $0 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)
2026-05-11 2026-03-31 13F MP MATERIALS COM CL A 553368101 568,593 -382,365 -40.21 27,440 -42.88 0.0059
2026-02-13 2025-12-31 13F MP MATERIALS COM CL A 553368101 950,958 372,038 64.26 48,042 23.73 0.0212
2025-11-10 2025-09-30 13F MP MATERIALS COM CL A 553368101 578,920 429,822 288.28 38,828 682.82 0.0173
2025-08-11 2025-06-30 13F MP MATERIALS COM CL A 553368101 149,098 38,282 34.55 4,960 83.36 0.0024
2025-05-12 2025-03-31 13F MP MATERIALS COM CL A 553368101 110,816 12,306 12.49 2,705 76.11 0.0014
2025-02-12 2024-12-31 13F MP MATERIALS COM CL A 553368101 98,510 -404 -0.41 1,537 -11.98 0.0009
2024-11-12 2024-09-30 13F MP MATERIALS COM CL A 553368101 98,914 46,175 87.55 1,746 160.06 0.0010
2024-08-12 2024-06-30 13F MP MATERIALS COM CL A 553368101 52,739 -80,394 -60.39 671 -64.74 0.0004
2024-05-10 2024-03-31 13F MP MATERIALS COM CL A 553368101 133,133 109,254 457.53 1,904 302.33 0.0013
2024-02-09 2023-12-31 13F MP MATERIALS COM CL A 553368101 23,879 -10,037 -29.59 474 -26.89 0.0003
2023-12-06 2023-09-30 13F/A-1 MP MATERIALS COM CL A 553368101 33,916 -8,310 -19.68 648 -33.02 0.0005
2023-11-09 2023-09-30 13F MP MATERIALS COM CL A 553368101 33,916 -8,310 648 0.0002
2023-08-10 2023-06-30 13F MP MATERIALS COM CL A 553368101 42,226 -548,240 -92.85 966 -94.20 0.0006
2023-05-11 2023-03-31 13F MP MATERIALS COM CL A 553368101 590,466 19,170 3.36 16,645 20.00 0.0117
2023-02-09 2022-12-31 13F MP MATERIALS COM CL A 553368101 571,296 -97,022 -14.52 13,871 -23.98 0.0110
2022-11-10 2022-09-30 13F MP MATERIALS COM CL A 553368101 668,318 -27,280 -3.92 18,246 -18.23 0.0131
2022-08-10 2022-06-30 13F MP MATERIALS COM CL A 553368101 695,598 -53,233 -7.11 22,314 -48.03 0.0166
2022-05-12 2022-03-31 13F MP MATERIALS COM CL A 553368101 748,831 -81,286 -9.79 42,939 13.89 0.0261
2022-02-10 2021-12-31 13F MP MATERIALS COM CL A 553368101 830,117 -13,048 -1.55 37,703 38.74 0.0202
2021-11-10 2021-09-30 13F MP MATERIALS COM CL A 553368101 843,165 817,393 3,171.63 27,175 2,760.53 0.0161
2021-08-10 2021-06-30 13F MP MATERIALS COM CL A 553368101 25,772 3,751 17.03 950 19.95 0.0006
2021-05-13 2021-03-31 13F MP MATERIALS COM CL A 553368101 22,021 -33,000 -59.98 792 -55.25 0.0005
2021-02-11 2020-12-31 13F MP MATERIALS COM CL A 553368101 55,021 55,021 1,770 0.0010
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
(%)
2026-05-11 2026-03-31 13F MP MATERIALS COM CL A Call 112,000 -68.18 5,405 -69.61 n/a n/a n/a
2026-02-13 2025-12-31 13F MP MATERIALS COM CL A Call 352,000 60.00 17,783 20.52 n/a n/a n/a
2025-11-10 2025-09-30 13F MP MATERIALS COM CL A Call 220,000 14,755 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
(%)
2025-02-12 2024-12-31 13F MP MATERIALS COM CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-12 2024-09-30 13F MP MATERIALS COM CL A Put 46,100 5.73 814 46.49 n/a n/a n/a
2024-08-12 2024-06-30 13F MP MATERIALS COM CL A Put 43,600 555 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.