Sergey Brin
Sergey Brin: Director · 10% owner at Alphabet. What Sergey Brin 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.
Alphabet (GOOGL)
Sergey Brin holds 717.8M Alphabet shares (5.9% of the company), worth about $249.5B at the last price, according to the Form 4 of Aug 7, 2026.
- Shares held: 717.1M (5.9%), $249.3B — Held in their own name: 359.2M Class C, 357.9M Class B, 37,469 Class A.
- Shares held: 690,800 (0.01%), $240.1M — Held through trusts (SMB Pacific 2021 Charitable Remainder Unitrust I, SMB Pacific 2021 Charitable Remainder Unitrust II): 345,400 Class C, 345,400 Class B.
Declarations
- Alphabet (GOOGL) — Form 4 of Aug 7, 2026: conversion of 673,200; gift of 673,200; 717.8M shares after 0001193125-26-345383
- Alphabet (GOOGL) — Form 4 of Feb 19, 2026: gift of 437,500; gift of 437,500; 719.2M shares after 0001193125-26-072513
- Alphabet (GOOGL) — 13G filed Feb 17, 2026: 359.4M shares counted as of Dec 31, 2025, 5.8% as declared
- Alphabet (GOOGL) — Form 4 of Nov 26, 2025: conversion of 1.8M; gift of 1.8M; 719.1M shares after 0001193125-25-302626
- Alphabet (GOOGL) — Form 4 of May 21, 2025: conversion of 2.0M; gift of 2.0M; 722.6M shares after 0000950170-25-075820
- Alphabet (GOOGL) — Form 4 of Nov 26, 2024: conversion of 322,800; gift of 322,800; 726.7M shares after 0000950170-24-131189
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.