Siebert Financial SIEB Institutional Ownership

Updated Oct 10, 2026

Siebert Financial Corp (NASDAQ:SIEB) appeared in the 13F filings of 49 institutional investors for the quarter ended June 30, 2026.

• Together they owned 5.79% of the outstanding stock in Q2 2026, down from 7.81% a quarter earlier.
• Total shares held in Siebert Financial fell 25.50% from Q1 2026, while the number of holders rose 13.95% from Q2 2025.
• Of the 49 holders of SIEB in Q2 2026, 24 added to their positions, 23 reduced their stakes and 2 left their positions unchanged.
• The aggregate institutional position in Siebert Financial was 2.38Mn shares at the end of Q2 2026, down 815.05K from the prior quarter and down 792.44K from a year earlier.
• As of June 30, 2026, the biggest holder of Siebert Financial was Vanguard Capital Management LLC with 549.72K shares, or 1.34% of shares outstanding.
• Holders that added the most shares of Siebert Financial in Q2 2026 were Citadel Advisors LLC (+21.56K shares), Goldman Sachs Group Inc (+20.09K shares), Susquehanna International Group, LLP (+19.64K shares), Morgan Stanley (+13.85K shares) and Russell Investments Group, Ltd. (+7.69K shares).
• On the other side, among holders that kept a position in Siebert Financial, the largest reductions in Q2 2026 came from BlackRock, Inc. (-677.64K shares), Geode Capital Management, LLC (-181.65K shares), UBS Group AG (-138.3K shares), Northern Trust Corp (-96.31K shares) and State Street Corp (-93.58K shares).
• Per Business Quant, the top 10 investors in SIEB for the quarter ended June 30, 2026 were Vanguard Capital Management LLC (549.72K shares), Cantor Fitzgerald, L. P. (515.91K shares), Geode Capital Management, LLC (253.89K shares), Cetera Investment Advisers (146.99K shares), Millennium Management LLC (121.23K shares), Vanguard Fiduciary Trust Co (107.63K shares), BlackRock, Inc. (101.95K shares), Goldman Sachs Group Inc (56.16K shares), Jane Street Group, LLC (55.77K shares) and State Street Corp (50.65K shares).