Meta Platforms, Inc.
MX ˙ BMV ˙ US30303M1027
SecurityMX:META / Meta Platforms, Inc.
InstitutionCastleKnight Management LP
Latest Disclosed Ownership8,900 shares
Latest Disclosed Value $ 5,091,957
CastleKnight Management LP ownership in META / Meta Platforms, Inc.

On May 15, 2026 - CastleKnight Management LP filed a 13F-HR form disclosing ownership of 8,900 shares of Meta Platforms, Inc. (MX:META) valued at $5,091,957 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 63,880 shares of Meta Platforms, Inc.. This represents a change in shares of -86.07% during the quarter.

CastleKnight Management LP has a history of taking positions in derivatives of the underlying security (META) in the form of stock options. The firm currently holds call options representing 30,000 of underlying shares valued at $17,163,900 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:META / Meta Platforms, Inc. 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 META PLATFORMS CL A 30303M102 8,900 -54,980 -86.07 5,092 -87.93 0.0849
2026-02-17 2025-12-31 13F META PLATFORMS CL A 30303M102 63,880 9,310 17.06 42,167 5.22 0.9341
2025-11-14 2025-09-30 13F META PLATFORMS CL A 30303M102 54,570 12,650 30.18 40,075 29.52 0.7896
2025-08-14 2025-06-30 13F META PLATFORMS CL A 30303M102 41,920 7,120 20.46 30,941 54.26 0.8740
2025-05-15 2025-03-31 13F META PLATFORMS CL A 30303M102 34,800 17,060 96.17 20,057 93.12 0.7873
2025-02-14 2024-12-31 13F META PLATFORMS CL A 30303M102 17,740 4,600 35.01 10,387 38.09 0.3034
2024-11-14 2024-09-30 13F META PLATFORMS CL A 30303M102 13,140 -11,070 -45.72 7,522 -38.39 0.3099
2024-08-14 2024-06-30 13F META PLATFORMS CL A 30303M102 24,210 -2,670 -9.93 12,207 -6.47 0.6062
2024-05-15 2024-03-31 13F META PLATFORMS CL A 30303M102 26,880 -20,400 -43.15 13,052 -22.01 0.7787
2024-02-14 2023-12-31 13F META PLATFORMS CL A 30303M102 47,280 -19,490 -29.19 16,735 -16.51 0.8829
2023-11-14 2023-09-30 13F META PLATFORMS CL A 30303M102 66,770 14,530 27.81 20,045 33.71 1.3154
2023-08-14 2023-06-30 13F META PLATFORMS CL A 30303M102 52,240 31,140 147.58 14,992 235.29 1.5743
2023-05-15 2023-03-31 13F META PLATFORMS CL A 30303M102 21,100 16,400 348.94 4,472 691.33 0.4622
2023-02-14 2022-12-31 13F META PLATFORMS CL A 30303M102 4,700 4,700 566 0.0746
2022-11-14 2022-09-30 13F META PLATFORMS CL A 30303M102 0 -4,325 -100.00 0 -100.00
2022-08-15 2022-06-30 13F META PLATFORMS CL A 30303M102 4,325 -8,400 -66.01 697 -75.37 0.1152
2022-05-16 2022-03-31 13F META PLATFORMS CL A 30303M102 12,725 -35 -0.27 2,830 -34.06 0.4037
2022-02-14 2021-12-31 13F META PLATFORMS CL A 30303M102 12,760 12,760 4,292 0.8852
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 META PLATFORMS CL A Call 30,000 17,164 n/a n/a n/a
2026-02-17 2025-12-31 13F META PLATFORMS CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F META PLATFORMS CL A Call 40,000 42.86 29,375 42.14 n/a n/a n/a
2025-08-14 2025-06-30 13F META PLATFORMS CL A Call 28,000 -40.43 20,667 -23.71 n/a n/a n/a
2025-05-15 2025-03-31 13F META PLATFORMS CL A Call 47,000 67.86 27,089 65.23 n/a n/a n/a
2025-02-14 2024-12-31 13F META PLATFORMS CL A Call 28,000 75.00 16,394 78.99 n/a n/a n/a
2024-11-14 2024-09-30 13F META PLATFORMS CL A Call 16,000 -20.00 9,159 -9.17 n/a n/a n/a
2024-08-14 2024-06-30 13F META PLATFORMS CL A Call 20,000 10,084 n/a n/a n/a
2024-05-15 2024-03-31 13F META PLATFORMS CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-14 2023-12-31 13F META PLATFORMS CL A Call 15,000 -62.50 5,309 -55.79 n/a n/a n/a
2023-11-14 2023-09-30 13F META PLATFORMS CL A Call 40,000 14.29 12,008 19.55 n/a n/a n/a
2023-08-14 2023-06-30 13F META PLATFORMS CL A Call 35,000 -41.67 10,044 -21.01 n/a n/a n/a
2023-05-15 2023-03-31 13F META PLATFORMS CL A Call 60,000 12,716 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.