Mark Zuckerberg
Mark Zuckerberg: COB and CEO · Director · 10% owner at Meta Platforms. What Mark Zuckerberg holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Meta Platforms (META)
Mark Zuckerberg holds 342.4M Meta Platforms shares (13.4% of the company), worth about $254.4B at the last price, according to the Form 4 of Sep 24, 2026.
- Shares held: 339.0M (13.3%), $251.8B — Held through companies or funds (By Chan Zuckerberg Biohub, Inc., By CZI Holdings, LLC, By Chan Zuckerberg Holdings, LLC, By CZI Holdings I, LLC): 337.8M Class B, 1.2M Class A.
- Shares held: 3.4M (0.13%), $2.5B — Held through trusts (By Mark Zuckerberg, Trustee Of The Mark Zuckerberg Trust Dated July 7, 2006): 3.4M Class B.
Declarations
- Meta Platforms (META) — Form 4 of Sep 24, 2026 (COB and CEO): conversion of 17,140; open-market sale of 2,093 at $775.39; 342.4M shares after 0000950103-26-014647
- Meta Platforms (META) — Form 4 of Jul 31, 2026 (COB and CEO): conversion of 591,690; gift of 591,690; 342.5M shares after 0000950103-26-011908
- Meta Platforms (META) — Form 4 of May 7, 2026 (COB and CEO): gift of 8.7M; gift of 8.7M; 342.5M shares after 0000950103-26-007078
- Meta Platforms (META) — Form 4 of Oct 31, 2025 (COB and CEO): conversion of 242,340; gift of 242,340; 342.5M shares after 0000950103-25-014304
- Meta Platforms (META) — Form 4 of Aug 13, 2025 (COB and CEO): conversion of 1,037; open-market sale of 26 at $778.57; 342.5M shares after 0000950103-25-010271
- Meta Platforms (META) — Form 4 of Aug 12, 2025 (COB and CEO): conversion of 15,847; open-market sale of 80 at $773.45; 342.5M shares after 0000950103-25-010270
- Meta Platforms (META) — Form 4 of Aug 11, 2025 (COB and CEO): conversion of 15,847; open-market sale of 1,157 at $765.39; 342.5M shares after 0000950103-25-010269
- Meta Platforms (META) — Form 4 of Aug 8, 2025 (COB and CEO): conversion of 15,847; open-market sale of 100 at $759.63; 342.5M shares after 0000950103-25-010157
- Meta Platforms (META) — Form 4 of Aug 7, 2025 (COB and CEO): conversion of 15,847; open-market sale of 792 at $760.77; 342.5M shares after 0000950103-25-010158
- Meta Platforms (META) — Form 4 of Aug 6, 2025 (COB and CEO): conversion of 15,847; open-market sale of 680 at $761.28; 342.5M shares after 0000950103-25-010038
- Meta Platforms (META) — Form 4 of Aug 5, 2025 (COB and CEO): conversion of 15,847; open-market sale of 982 at $763.86; 342.5M shares after 0000950103-25-010037
- Meta Platforms (META) — Form 4 of Aug 4, 2025 (COB and CEO): conversion of 15,847; open-market sale of 170 at $759.51; 342.6M shares after 0000950103-25-010036
- Meta Platforms (META) — Form 4 of Aug 1, 2025 (COB and CEO): conversion of 412,854; gift of 397,007; 342.6M shares after 0000950103-25-009864
- Meta Platforms (META) — Form 4 of Jul 31, 2025 (COB and CEO): conversion of 15,847; open-market sale of 200 at $767.18; 342.6M shares after 0000950103-25-009863
- Meta Platforms (META) — Form 4 of Jul 2, 2025 (COB and CEO): open-market sale of 408 at $713.62; open-market sale of 366 at $714.82; 342.6M shares after 0000950103-25-008410
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.