Meta Platforms, Inc.
MX ˙ BMV ˙ US30303M1027
SecurityMX:META / Meta Platforms, Inc.
InstitutionGreat Diamond Partners, LLC
Latest Disclosed Ownership3,233 shares
Latest Disclosed Value $ 1,849,696
Great Diamond Partners, LLC reports 1.67% increase in ownership of META / Meta Platforms, Inc.

On May 12, 2026 - Great Diamond Partners, LLC filed a 13F-HR form disclosing ownership of 3,233 shares of Meta Platforms, Inc. (MX:META) valued at $1,849,696 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 3,180 shares of Meta Platforms, Inc.. This represents a change in shares of 1.67% 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)
2026-05-12 2026-03-31 13F META PLATFORMS CL A 30303M102 3,233 53 1.67 1,850 -11.91 0.3560
2026-02-06 2025-12-31 13F META PLATFORMS CL A 30303M102 3,180 -187 -5.55 2,099 -15.09 0.4039
2025-10-20 2025-09-30 13F META PLATFORMS CL A 30303M102 3,367 -29 -0.85 2,473 -1.36 0.4796
2025-08-13 2025-06-30 13F META PLATFORMS CL A 30303M102 3,396 638 23.13 2,507 57.71 0.5294
2025-05-13 2025-03-31 13F META PLATFORMS CL A 30303M102 2,758 -198 -6.70 1,590 -8.15 0.4345
2025-01-23 2024-12-31 13F META PLATFORMS CL A 30303M102 2,956 -24 -0.81 1,731 1.47 0.4476
2024-10-25 2024-09-30 13F META PLATFORMS CL A 30303M102 2,980 -1,759 -37.12 1,706 -28.63 0.4335
2024-07-29 2024-06-30 13F META PLATFORMS CL A 30303M102 4,739 -331 -6.53 2,389 -2.93 0.5615
2024-05-08 2024-03-31 13F META PLATFORMS CL A 30303M102 5,070 -904 -15.13 2,462 16.41 0.5653
2024-02-07 2023-12-31 13F META PLATFORMS CL A 30303M102 5,974 -506 -7.81 2,115 8.69 0.5211
2023-10-19 2023-09-30 13F META PLATFORMS CL A 30303M102 6,480 -406 -5.90 1,945 -1.57 0.5267
2023-07-17 2023-06-30 13F META PLATFORMS CL A 30303M102 6,886 -183 -2.59 1,976 31.91 0.5217
2023-05-04 2023-03-31 13F META PLATFORMS CL A 30303M102 7,069 -31 -0.44 1,498 75.41 0.4339
2023-02-01 2022-12-31 13F META PLATFORMS CL A 30303M102 7,100 1,006 16.51 854 3.39 0.2630
2022-10-24 2022-09-30 13F META PLATFORMS INC CL A CL A 30303M102 6,094 301 5.20 826 -11.56 0.2823
2022-07-26 2022-06-30 13F META PLATFORMS INC CL A CL A 30303M102 5,793 241 4.34 934 -24.31 0.3105
2022-05-05 2022-03-31 13F META PLATFORMS INC CL A CL A 30303M102 5,552 98 1.80 1,234 -32.72 0.3435
2022-01-26 2021-12-31 13F META PLATFORMS INC CL A CL A 30303M102 5,454 293 5.68 1,834 4.74 0.4722
2021-10-21 2021-09-30 13F FACEBOOK INC CL A CL A 30303M102 5,161 38 0.74 1,751 -1.68 0.4800
2021-07-26 2021-06-30 13F FACEBOOK INC CL A CL A 30303M102 5,123 137 2.75 1,781 21.32 0.5037
2021-05-04 2021-03-31 13F FACEBOOK INC CL A CL A 30303M102 4,986 -25 -0.50 1,468 7.31 0.4517
2021-01-26 2020-12-31 13F FACEBOOK INC CL A CL A 30303M102 5,011 -361 -6.72 1,368 -2.70 0.4361
2020-10-19 2020-09-30 13F FACEBOOK INC CL A CL A 30303M102 5,372 240 4.68 1,406 20.69 0.5159
2020-08-04 2020-06-30 13F FACEBOOK INC CL A CL A 30303M102 5,132 38 0.75 1,165 37.22 0.4823
2020-05-01 2020-03-31 13F FACEBOOK INC CL A CL A 30303M102 5,094 -673 -11.67 849 -28.23 0.4370
2020-02-07 2019-12-31 13F FACEBOOK INC CL A CL A 30303M102 5,767 5,767 1,183 0.4498
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.