Meta Platforms, Inc.
MX ˙ BMV ˙ US30303M1027
SecurityMX:META / Meta Platforms, Inc.
InstitutionMariner, LLC
Latest Disclosed Ownership1,423,014 shares
Latest Disclosed Value $ 813,817,607
Mariner, LLC ownership in META / Meta Platforms, Inc.

On May 13, 2026 - Mariner, LLC filed a 13F-HR form disclosing ownership of 1,423,014 shares of Meta Platforms, Inc. (MX:META) valued at $813,817,607 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,467,617 shares of Meta Platforms, Inc.. This represents a change in shares of -3.04% during the quarter.

Mariner, LLC has a history of taking positions in derivatives of the underlying security (META) in the form of stock options.

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)
2026-05-13 2026-03-31 13F META PLATFORMS CL A 30303M102 1,423,014 -44,603 -3.04 813,818 -16.01 0.7836
2026-02-13 2025-12-31 13F META PLATFORMS CL A 30303M102 1,467,617 98,170 7.17 968,896 -3.66 1.1536
2025-11-14 2025-09-30 13F META PLATFORMS CL A 30303M102 1,369,447 239,931 21.24 1,005,748 20.65 1.2996
2025-08-14 2025-06-30 13F META PLATFORMS CL A 30303M102 1,129,516 115,050 11.34 833,625 42.57 1.2033
2025-05-15 2025-03-31 13F META PLATFORMS CL A 30303M102 1,014,466 64,753 6.82 584,702 5.14 0.9729
2025-02-13 2024-12-31 13F META PLATFORMS CL A 30303M102 949,713 61,328 6.90 556,113 9.38 0.9338
2024-11-13 2024-09-30 13F META PLATFORMS CL A 30303M102 888,385 74,082 9.10 508,422 23.82 0.9020
2024-08-13 2024-06-30 13F META PLATFORMS CL A 30303M102 814,303 172,567 26.89 410,608 31.75 0.7960
2024-05-15 2024-03-31 13F META PLATFORMS CL A 30303M102 641,736 218,815 51.74 311,647 108.19 0.6444
2024-02-14 2023-12-31 13F META PLATFORMS CL A 30303M102 422,921 34,790 8.96 149,690 28.47 0.3550
2023-11-13 2023-09-30 13F META PLATFORMS CL A 30303M102 388,131 21,594 5.89 116,515 10.78 0.3125
2023-08-11 2023-06-30 13F META PLATFORMS CL A 30303M102 366,537 22,952 6.68 105,173 145,972.22 0.2810
2023-05-15 2023-03-31 13F META PLATFORMS CL A 30303M102 343,585 -10,504 -2.97 73 -99.83 0.2115
2023-02-14 2022-12-31 13F META PLATFORMS CL A 30303M102 354,089 -105,722 -22.99 42,609 -31.70 0.1370
2022-11-10 2022-09-30 13F META PLATFORMS CL A 30303M102 459,811 50,588 12.36 62,385 -5.46 0.2494
2022-08-15 2022-06-30 13F META PLATFORMS CL A 30303M102 409,223 65,231 18.96 65,986 -13.73 0.2710
2022-05-13 2022-03-31 13F META PLATFORMS CL A 30303M102 343,992 142,251 70.51 76,491 12.73 0.2887
2022-02-14 2021-12-31 13F META PLATFORMS CL A 30303M102 201,741 37,162 22.58 67,856 21.48 0.2870
2021-11-15 2021-09-30 13F FACEBOOK CL A 30303M102 164,579 21,428 14.97 55,856 12.22 0.2916
2021-08-24 2021-06-30 13F FACEBOOK CL A 30303M102 143,151 2,653 1.89 49,775 20.30 0.3088
2021-05-07 2021-03-31 13F FACEBOOK CL A 30303M102 140,498 -112,504 -44.47 41,377 -40.13 0.2885
2021-02-16 2020-12-31 13F FACEBOOK CL A 30303M102 253,002 14,937 6.27 69,110 10.84 0.5301
2020-11-13 2020-09-30 13F FACEBOOK CL A 30303M102 238,065 -1,419 -0.59 62,349 14.66 0.5870
2020-08-14 2020-06-30 13F FACEBOOK CL A 30303M102 239,484 10,472 4.57 54,379 42.35 0.5451
2020-05-14 2020-03-31 13F FACEBOOK CL A 30303M102 229,012 37,388 19.51 38,202 -2.87 0.4774
2020-02-13 2019-12-31 13F FACEBOOK CL A 30303M102 191,624 5,578 3.00 39,331 18.71 0.4085
2019-11-13 2019-09-30 13F FACEBOOK CL A 30303M102 186,046 4,599 2.53 33,131 -5.39 0.3963
2019-08-14 2019-06-30 13F FACEBOOK CL A 30303M102 181,447 4,943 2.80 35,019 19.03 0.4178
2019-05-15 2019-03-31 13F FACEBOOK CL A 30303M102 176,504 28,250 19.06 29,421 51.38 0.4194
2019-02-13 2018-12-31 13F FACEBOOK CL A 30303M102 148,254 70,407 90.44 19,435 51.80 0.3461
2018-11-14 2018-09-30 13F FACEBOOK CL A 30303M102 77,847 4,725 6.46 12,803 -9.90 0.3292
2018-08-14 2018-06-30 13F FACEBOOK CL A 30303M102 73,122 8,652 13.42 14,209 37.92 0.4028
2018-05-15 2018-03-31 13F FACEBOOK CL A 30303M102 64,470 29,392 83.79 10,302 66.43 0.3693
2018-02-09 2017-12-31 13F FACEBOOK CL A 30303M102 35,078 3,960 12.73 6,190 16.40 0.2395
2017-11-14 2017-09-30 13F FACEBOOK CL A 30303M102 31,118 1,451 4.89 5,318 18.73 0.2404
2017-08-11 2017-06-30 13F FACEBOOK CL A 30303M102 29,667 -26,356 -47.04 4,479 -43.72 0.2107
2017-05-15 2017-03-31 13F FACEBOOK CL A 30303M102 56,023 7,978 16.61 7,958 43.96 0.3466
2017-02-14 2016-12-31 13F FACEBOOK CL A 30303M102 48,045 17,411 56.84 5,528 40.73 0.2548
2016-11-14 2016-09-30 13F FACEBOOK CL A 30303M102 30,634 2,985 10.80 3,928 24.34 0.1898
2016-08-12 2016-06-30 13F FACEBOOK CL A 30303M102 27,649 2,190 8.60 3,159 8.78 0.1709
2016-05-13 2016-03-31 13F FACEBOOK CL A 30303M102 25,459 7,477 41.58 2,904 54.39 0.1724
2016-02-16 2015-12-31 13F FACEBOOK CL A 30303M102 17,982 -5,430 -23.19 1,881 -10.60 0.1207
2015-11-16 2015-09-30 13F FACEBOOK CL A 30303M102 23,412 122 0.52 2,104 5.36 0.0935
2015-08-17 2015-06-30 13F Facebook Inc - A COS 30303M102 23,290 13,173 130.21 1,997 140.31 0.0926
2015-05-15 2015-03-31 13F FACEBOOK CL A 30303M102 10,117 1,079 11.94 831 17.87 0.0707
2015-02-13 2014-12-31 13F FACEBOOK CL A 30303M102 9,038 2,055 29.43 705 27.72 0.0635
2014-11-13 2014-09-30 13F FACEBOOK CL A 30303M102 6,983 2,612 59.76 552 87.76 0.0622
2014-08-21 2014-06-30 13F FACEBOOK CL A 30303M102 4,371 683 18.52 294 32.43 0.0326
2014-05-08 2014-03-31 13F FACEBOOK CL A 30303M102 3,688 -4,520 -55.07 222 -50.56 0.0286
2014-02-14 2013-12-31 13F FACEBOOK CL A 30303M102 8,208 -482 -5.55 449 2.98 0.0562
2013-11-14 2013-09-30 13F FACEBOOK CL A 30303M102 8,690 -1,051 -10.79 436 80.17 0.0804
2013-08-19 2013-06-30 13F FACEBOOK CL A 30303M102 9,741 9,741 242 0.0510
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
(%)
2018-08-14 2018-06-30 13F FACEBOOK CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-05-15 2018-03-31 13F FACEBOOK CL A Put 200 2 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.