Meta Platforms, Inc.
MX ˙ BMV ˙ US30303M1027
SecurityMX:META / Meta Platforms, Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership1,659,646 shares
Latest Disclosed Value $ 949,533,270
Robeco Institutional Asset Management B.V. reports 13.55% decrease in ownership of META / Meta Platforms, Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 1,659,646 shares of Meta Platforms, Inc. (MX:META) valued at $949,533,270 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 1,919,709 shares of Meta Platforms, Inc.. This represents a change in shares of -13.55% 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)
2026-04-21 2026-03-31 13F META PLATFORMS CL A 30303M102 1,659,646 -260,063 -13.55 949,533 -25.07 1.3534
2026-01-23 2025-12-31 13F META PLATFORMS CL A 30303M102 1,919,709 -336,806 -14.93 1,267,181 -23.53 1.8047
2025-10-22 2025-09-30 13F META PLATFORMS CL A 30303M102 2,256,515 70,970 3.25 1,657,139 2.73 2.4006
2025-07-18 2025-06-30 13F META PLATFORMS CL A 30303M102 2,185,545 -92,150 -4.05 1,613,129 22.88 2.6083
2025-04-23 2025-03-31 13F META PLATFORMS CL A 30303M102 2,277,695 -12,979 -0.57 1,312,772 -2.12 2.5502
2025-01-23 2024-12-31 13F META PLATFORMS CL A 30303M102 2,290,674 287,130 14.33 1,341,213 16.94 2.5422
2024-10-29 2024-09-30 13F META PLATFORMS CL A 30303M102 2,003,544 -20,798 -1.03 1,146,909 12.36 2.2782
2024-07-23 2024-06-30 13F META PLATFORMS CL A 30303M102 2,024,342 -68,960 -3.29 1,020,714 0.42 2.1962
2024-04-24 2024-03-31 13F META PLATFORMS CL A 30303M102 2,093,302 390,485 22.93 1,016,466 68.64 2.2088
2024-02-14 2023-12-31 13F/A-1 META PLATFORMS CL A 30303M102 1,702,817 -224,422 -11.64 602,729 4.17 1.4612
2024-02-08 2023-12-31 13F META PLATFORMS CL A 30303M102 1,108,979 -818,260 1,703 0.3189
2023-10-24 2023-09-30 13F META PLATFORMS CL A 30303M102 1,927,239 121,118 6.71 578,576 11.63 1.5462
2023-07-24 2023-06-30 13F META PLATFORMS CL A 30303M102 1,806,121 -211,295 -10.47 518,321 21.22 1.3589
2023-05-04 2023-03-31 13F META PLATFORMS CL A 30303M102 2,017,416 534,164 36.01 427,571 139.54 1.1656
2023-02-07 2022-12-31 13F META PLATFORMS CL A 30303M102 1,483,252 87,603 6.28 178,495 -5.74 0.5144
2022-12-01 2022-09-30 13F/A-1 META PLATFORMS CL A 30303M102 1,395,649 197,561 16.49 189,357 -1.99 0.6119
2022-10-27 2022-09-30 13F META PLATFORMS CL A 30303M102 1,395,649 197,561 189,357 0.6037
2022-12-01 2022-06-30 13F/A-1 META PLATFORMS CL A 30303M102 1,198,088 -923,671 -43.53 193,193 -59.05 0.6003
2022-07-27 2022-06-30 13F META PLATFORMS CL A 30303M102 1,198,088 -923,671 193,193 0.5918
2022-12-01 2022-03-31 13F/A-1 META PLATFORMS CL A 30303M102 2,121,759 -13,715 -0.64 471,796 -34.31 1.1113
2022-04-26 2022-03-31 13F META PLATFORMS CL A 30303M102 2,121,759 -13,715 471,796 1.0980
2022-12-01 2021-12-31 13F/A-1 META PLATFORMS CL A 30303M102 2,135,474 -35,859 -1.65 718,268 -2.53 1.5287
2022-01-31 2021-12-31 13F META PLATFORMS CL A 30303M102 2,135,474 -35,859 718,268 1.5096
2022-12-01 2021-09-30 13F/A-1 FACEBOOK CL A 30303M102 2,171,333 327,504 17.76 736,926 14.94 1.6338
2021-10-20 2021-09-30 13F FACEBOOK CL A 30303M102 2,171,333 327,504 736,926 1.6129
2022-12-01 2021-06-30 13F/A-1 FACEBOOK CL A 30303M102 1,843,829 129,103 7.53 641,119 26.94 1.4212
2021-07-28 2021-06-30 13F FACEBOOK CL A 30303M102 1,843,829 129,103 641,119 1.4018
2022-12-01 2021-03-31 13F/A-1 FACEBOOK CL A 30303M102 1,714,726 109,825 6.84 505,037 15.20 1.2447
2021-04-23 2021-03-31 13F FACEBOOK CL A 30303M102 1,714,726 109,825 505,037 1.2272
2022-12-01 2020-12-31 13F/A-1 FACEBOOK CL A 30303M102 1,604,901 270,556 20.28 438,396 25.45 1.1519
2021-01-28 2020-12-31 13F FACEBOOK CL A 30303M102 1,604,901 270,556 438,396 1.1381
2021-01-19 2020-09-30 13F/A-1 FACEBOOK CL A 30303M102 1,334,345 342,951 34.59 349,465 55.24 1.0801
2020-10-29 2020-09-30 13F FACEBOOK CL A 30303M102 1,334,345 342,951 349,465 1,079,261.6567
2021-01-19 2020-06-30 13F/A-1 FACEBOOK CL A 30303M102 991,394 196,605 24.74 225,117 69.80 0.7645
2020-07-20 2020-06-30 13F FACEBOOK CL A 30303M102 991,394 196,605 225,117 763,862.1346
2021-01-19 2020-03-31 13F/A-1 FACEBOOK CL A 30303M102 794,789 215,227 37.14 132,575 11.45 0.5318
2020-04-30 2020-03-31 13F FACEBOOK CL A 30303M102 794,789 215,227 132,575 531,390.4983
2021-01-19 2019-12-31 13F/A-1 FACEBOOK CL A 30303M102 579,562 17,196 3.06 118,951 18.78 0.3808
2020-02-06 2019-12-31 13F FACEBOOK CL A 30303M102 579,562 17,196 118,951 380,455.6262
2021-01-19 2019-09-30 13F/A-1 FACEBOOK CL A 30303M102 562,366 -12,936 -2.25 100,145 -9.81 0.3536
2019-10-17 2019-09-30 13F FACEBOOK CL A 30303M102 562,366 -12,936 100,145 353,052.3099
2021-01-19 2019-06-30 13F/A-1 FACEBOOK CL A 30303M102 575,302 47,898 9.08 111,034 26.30 0.3921
2019-07-19 2019-06-30 13F FACEBOOK CL A 30303M102 575,302 47,898 111,034 391,534.9270
2021-01-19 2019-03-31 13F/A-1 FACEBOOK CL A 30303M102 527,404 172,959 48.80 87,915 89.04 0.3233
2019-05-02 2019-03-31 13F FACEBOOK CL A 30303M102 527,404 172,959 87,915 322,792.6056
2021-01-19 2018-12-31 13F/A-1 FACEBOOK CL A 30303M102 354,445 -31,417 -8.14 46,507 -26.71 0.2088
2019-02-08 2018-12-31 13F FACEBOOK CL A 30303M102 354,445 -31,417 46,507 208,465.3228
2021-01-19 2018-09-30 13F/A-1 FACEBOOK CL A 30303M102 385,862 100,045 35.00 63,459 14.26 0.2513
2021-01-19 2018-06-30 13F/A-1 FACEBOOK CL A 30303M102 285,817 -49,215 -14.69 55,539 3.74 0.2530
2018-08-03 2018-06-30 13F FACEBOOK CL A 30303M102 285,817 -49,215 55,539
2021-01-19 2018-03-31 13F/A-1 FACEBOOK CL A 30303M102 335,032 -485,525 -59.17 53,537 -63.03 0.2512
2018-05-07 2018-03-31 13F FACEBOOK CL A 30303M102 335,032 -485,525 53,537 250,367.5053
2021-01-19 2017-12-31 13F/A-1 FACEBOOK CL A 30303M102 820,557 -58,876 -6.69 144,797 -3.64 0.7503
2018-01-25 2017-12-31 13F FACEBOOK CL A 30303M102 820,557 -58,876 144,797
2021-01-19 2017-09-30 13F/A-1 FACEBOOK CL A 30303M102 879,433 30,014 3.53 150,267 17.17 0.9331
2017-10-17 2017-09-30 13F FACEBOOK CL A 30303M102 879,433 30,014 150,267 930,956.7802
2021-01-19 2017-06-30 13F/A-1 FACEBOOK CL A 30303M102 849,419 -220,475 -20.61 128,243 -15.62 0.8260
2017-08-07 2017-06-30 13F FACEBOOK CL A 30303M102 849,419 -220,475 128,243 834,965.2124
2021-01-19 2017-03-31 13F/A-1 FACEBOOK CL A 30303M102 1,069,894 -138,554 -11.47 151,979 9.31 1.0120
2017-05-15 2017-03-31 13F FACEBOOK CL A 30303M102 1,069,894 -138,554 151,979 1,009,435.3402
2017-02-09 2016-12-31 13F FACEBOOK CL A 30303M102 1,208,448 -409,525 -25.31 139,030 -33.01 1.0876
2016-11-07 2016-09-30 13F FACEBOOK CL A 30303M102 1,617,973 -89,056 -5.22 207,538 6.39 1.5340
2016-07-22 2016-06-30 13F FACEBOOK CL A 30303M102 1,707,029 -72,605 -4.08 195,079 -3.93 1.4793
2016-05-16 2016-03-31 13F FACEBOOK CL A 30303M102 1,779,634 -3,351 -0.19 203,056 8.81 1.6289
2016-02-08 2015-12-31 13F FACEBOOK CL A 30303M102 1,782,985 4,470 0.25 186,609 16.71 1.5959
2015-11-12 2015-09-30 13F FACEBOOK CL A 30303M102 1,778,515 73,608 4.32 159,889 9.35 1.2180
2015-08-17 2015-06-30 13F FACEBOOK CL A 30303M102 1,704,907 -104,484 -5.77 146,222 -1.71 1.1099
2015-04-24 2015-03-31 13F FACEBOOK CL A 30303M102 1,809,391 -51,936 -2.79 148,759 2.44 1.1184
2015-02-12 2014-12-31 13F FACEBOOK CL A 30303M102 1,861,327 -352,174 -15.91 145,221 -16.99 1.0413
2014-11-10 2014-09-30 13F FACEBOOK CL A 30303M102 2,213,501 -315,115 -12.46 174,952 2.82 1.2497
2014-08-13 2014-06-30 13F FACEBOOK CL A 30303M102 2,528,616 518,668 25.81 170,148 40.53 1.2176
2014-05-07 2014-03-31 13F FACEBOOK CL A 30303M102 2,009,948 -9,607 -0.48 121,079 9.68 0.9289
2014-02-04 2013-12-31 13F FACEBOOK CL A 30303M102 2,019,555 -41,326 -2.01 110,389 6.62 0.9173
2013-11-12 2013-09-30 13F FACEBOOK CL A 30303M102 2,060,881 1,483,618 257.01 103,538 621.42 1.0058
2013-08-27 2013-06-30 13F Facebook COM 30303M102 577,263 577,263 14,352 0.1452
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.