Meta Platforms, Inc.
MX ˙ BMV ˙ US30303M1027
SecurityMX:META / Meta Platforms, Inc.
InstitutionPortolan Capital Management, LLC
Latest Disclosed Ownership10,261 shares
Latest Disclosed Value $ 5,870,626
Portolan Capital Management, LLC reports 0.55% decrease in ownership of META / Meta Platforms, Inc.

On May 15, 2026 - Portolan Capital Management, LLC filed a 13F-HR form disclosing ownership of 10,261 shares of Meta Platforms, Inc. (MX:META) valued at $5,870,626 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 10,318 shares of Meta Platforms, Inc.. This represents a change in shares of -0.55% during the quarter.

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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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 10,261 -57 -0.55 5,871 -13.80 0.3124
2026-02-17 2025-12-31 13F META PLATFORMS CL A 30303M102 10,318 -1,370 -11.72 6,811 -20.66 0.3649
2025-11-13 2025-09-30 13F META PLATFORMS CL A 30303M102 11,688 -27 -0.23 8,583 -0.73 0.4645
2025-08-13 2025-06-30 13F META PLATFORMS CL A 30303M102 11,715 -728 -5.85 8,647 20.57 0.5421
2025-05-15 2025-03-31 13F META PLATFORMS CL A 30303M102 12,443 -2,264 -15.39 7,172 -16.72 0.5451
2025-02-13 2024-12-31 13F META PLATFORMS CL A 30303M102 14,707 -1,273 -7.97 8,611 -5.86 0.5792
2024-11-14 2024-09-30 13F META PLATFORMS CL A 30303M102 15,980 -7,681 -32.46 9,148 -23.33 0.6631
2024-08-14 2024-06-30 13F META PLATFORMS CL A 30303M102 23,661 -1,764 -6.94 11,930 -3.36 0.9824
2024-05-15 2024-03-31 13F META PLATFORMS CL A 30303M102 25,425 -13,594 -34.84 12,346 -10.61 0.9403
2024-02-14 2023-12-31 13F META PLATFORMS CL A 30303M102 39,019 -17,954 -31.51 13,811 -19.25 1.2075
2023-11-14 2023-09-30 13F META PLATFORMS COM 30303M102 56,973 -2,836 -4.74 17,104 -0.35 1.5984
2023-08-14 2023-06-30 13F META PLATFORMS COM 30303M102 59,809 -22,434 -27.28 17,164 -1.53 1.5197
2023-05-15 2023-03-31 13F META PLATFORMS COM 30303M102 82,243 -50,696 -38.13 17,431 8.96 1.6603
2023-02-13 2022-12-31 13F META PLATFORMS COM 30303M102 132,939 92,751 230.79 15,998 193.36 1.5871
2022-11-14 2022-09-30 13F META PLATFORMS COM 30303M102 40,188 -21,798 -35.17 5,453 -45.44 0.5763
2022-08-15 2022-06-30 13F META PLATFORMS COM 30303M102 61,986 22,795 58.16 9,995 14.69 1.0064
2022-05-16 2022-03-31 13F META PLATFORMS COM 30303M102 39,191 -25,903 -39.79 8,715 -60.19 0.6946
2022-02-14 2021-12-31 13F META PLATFORMS COM 30303M102 65,094 -6,249 -8.76 21,894 -9.58 1.4725
2021-11-15 2021-09-30 13F FACEBOOK COM 30303M102 71,343 7,009 10.89 24,213 8.24 1.7648
2021-08-16 2021-06-30 13F FACEBOOK COM 30303M102 64,334 16,339 34.04 22,370 58.25 1.6086
2021-05-17 2021-03-31 13F FACEBOOK COM 30303M102 47,995 10,470 27.90 14,136 37.91 1.1101
2021-02-16 2020-12-31 13F FACEBOOK COM 30303M102 37,525 8,523 29.39 10,250 34.94 0.9317
2020-11-16 2020-09-30 13F FACEBOOK COM 30303M102 29,002 -2,958 -9.26 7,596 4.67 0.8595
2020-08-14 2020-06-30 13F FACEBOOK COM 30303M102 31,960 -16,795 -34.45 7,257 -10.76 0.8288
2020-05-14 2020-03-31 13F FACEBOOK COM 30303M102 48,755 -36,777 -43.00 8,132 -53.68 1.2199
2020-02-14 2019-12-31 13F FACEBOOK COM 30303M102 85,532 -14,807 -14.76 17,555 -1.75 1.7733
2019-11-14 2019-09-30 13F FACEBOOK COM 30303M102 100,339 27,737 38.20 17,868 27.52 2.0143
2019-08-14 2019-06-30 13F FACEBOOK COM 30303M102 72,602 7,298 11.18 14,012 28.72 1.5072
2019-05-15 2019-03-31 13F FACEBOOK COM 30303M102 65,304 -239 -0.36 10,886 26.70 1.1199
2019-02-13 2018-12-31 13F FACEBOOK COM 30303M102 65,543 11,870 22.12 8,592 -2.66 1.0650
2018-11-14 2018-09-30 13F FACEBOOK COM 30303M102 53,673 -1,918 -3.45 8,827 -18.28 0.8709
2018-08-14 2018-06-30 13F FACEBOOK COM 30303M102 55,591 -10 -0.02 10,802 21.59 1.1030
2018-05-14 2018-03-31 13F FACEBOOK COM 30303M102 55,601 9,659 21.02 8,884 9.58 0.9731
2018-02-14 2017-12-31 13F FACEBOOK COM 30303M102 45,942 -146 -0.32 8,107 2.95 0.8878
2017-11-14 2017-09-30 13F FACEBOOK COM 30303M102 46,088 0 0.00 7,875 13.18 0.9389
2017-08-14 2017-06-30 13F FACEBOOK COM 30303M102 46,088 -5,166 -10.08 6,958 -4.44 0.8929
2017-05-15 2017-03-31 13F FACEBOOK COM 30303M102 51,254 -902 -1.73 7,281 21.33 0.9460
2017-02-14 2016-12-31 13F FACEBOOK COM 30303M102 52,156 -6,053 -10.40 6,001 -19.62 0.8080
2016-11-14 2016-09-30 13F FACEBOOK COM 30303M102 58,209 -7,906 -11.96 7,466 -1.19 1.0246
2016-08-12 2016-06-30 13F FACEBOOK COM 30303M102 66,115 407 0.62 7,556 0.79 1.0882
2016-05-13 2016-03-31 13F FACEBOOK COM 30303M102 65,708 52,933 414.35 7,497 460.73 1.0039
2016-02-12 2015-12-31 13F FACEBOOK COM 30303M102 12,775 0 0.00 1,337 16.46 0.1695
2015-11-13 2015-09-30 13F FACEBOOK COM 30303M102 12,775 0 0.00 1,148 4.74 0.1521
2015-08-14 2015-06-30 13F FACEBOOK COM 30303M102 12,775 -57 -0.44 1,096 3.89 0.1533
2015-05-15 2015-03-31 13F FACEBOOK COM 30303M102 12,832 -2,804 -17.93 1,055 -13.52 0.1936
2015-02-11 2014-12-31 13F FACEBOOK, INC. CMN COM 30303M102 15,636 0 0.00 1,220 -1.29 0.2444
2014-11-13 2014-09-30 13F FACEBOOK COM 30303M102 15,636 -13,681 -46.67 1,236 -37.35 0.2807
2014-08-12 2014-06-30 13F FACEBOOK COM 30303M102 29,317 -5,823 -16.57 1,973 -6.80 0.4310
2014-05-15 2014-03-31 13F FACEBOOK COM 30303M102 35,140 -5,378 -13.27 2,117 -4.38 0.4874
2014-02-13 2013-12-31 13F FACEBOOK COM 30303M102 40,518 -14,347 -26.15 2,214 -19.67 0.4909
2013-11-08 2013-09-30 13F FACEBOOK, INC. COM 30303M102 54,865 54,865 2,756 0.7219
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.