SIEBERT FINANCIAL CORP (SIEB) Institutional Shareholders
SIEBERT FINANCIAL CORP (SIEB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $3.93M in SIEB holdings during the latest filing period.
Vanguard Capital Management Llc is currently the largest disclosed institutional shareholder of SIEB tracked by InsiderSet, reporting ownership valued at approximately $907,038 in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.31M, representing an estimated gain of +44.85% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 82% of the total disclosed SIEB value among the investors covered in this analysis. Major shareholders include Vanguard Capital Management Llc, Cantor Fitzgerald, L. P., Geode Capital Management, Llc, and several other long-term asset managers with concentrated positions in SIEBERT FINANCIAL CORP (SIEB).
This page ranks the largest institutional SIEB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
46
Total Reported Value
$3.93M
Largest Holder
Vanguard Capital Management Llc
Largest Position
$907,038
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
70
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Vanguard Capital Management Llc | 0.00% | 549,720 | $907,038 | $1,313,831 | +$406,793 | +44.85% | |
| Cantor Fitzgerald, L. P. | 0.02% | 515,911 | $851,253 | $1,233,027 | +$381,774 | +44.85% | |
| Geode Capital Management, Llc | 0.00% | 253,888 | $419,165 | $606,792 | +$187,627 | +44.76% | |
| Cetera Investment Advisers | 0.00% | 146,990 | $242,534 | $351,306 | +$108,772 | +44.85% | |
| Millennium Management Llc | 0.00% | 121,232 | $200,033 | $289,744 | +$89,711 | +44.85% | |
| Vanguard Fiduciary Trust Co | 0.00% | 107,626 | $177,583 | $257,226 | +$79,643 | +44.85% | |
| Blackrock, Inc. | 0.00% | 101,946 | $168,210 | $243,651 | +$75,441 | +44.85% | |
| Goldman Sachs Group Inc | 0.00% | 56,158 | $92,661 | $134,218 | +$41,557 | +44.85% | |
| Jane Street Group, Llc | 0.00% | 55,771 | $92,023 | $133,293 | +$41,270 | +44.85% | |
| State Street Corp | 0.00% | 50,650 | $83,573 | $121,054 | +$37,481 | +44.85% | |
| Citadel Advisors Llc | 0.00% | 48,906 | $80,695 | $116,885 | +$36,190 | +44.85% | |
| Susquehanna International Group, Llp | 0.00% | 48,308 | $79,708 | $115,456 | +$35,748 | +44.85% | |
| Northern Trust Corp | 0.00% | 42,312 | $69,815 | $101,126 | +$31,311 | +44.85% | |
| Bridgeway Capital Management, Llc | 0.00% | 35,307 | $58,257 | $84,384 | +$26,127 | +44.85% | |
| Dimensional Fund Advisors Lp | 0.00% | 26,299 | $43,545 | $62,855 | +$19,310 | +44.34% | |
| Aqr Capital Management Llc | 0.00% | 25,273 | $41,701 | $60,402 | +$18,701 | +44.85% | |
| Ubs Group Ag | 0.00% | 22,296 | $36,788 | $53,287 | +$16,499 | +44.85% | |
| Morgan Stanley | 0.00% | 22,084 | $36,439 | $52,781 | +$16,342 | +44.85% | |
| Williams & Novak, Llc | 0.02% | 21,900 | $36,135 | $52,341 | +$16,206 | +44.85% | |
| Qube Research & Technologies Ltd | 0.00% | 21,315 | $35,170 | $50,943 | +$15,773 | +44.85% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 21,000 | $34,650 | $50,190 | +$15,540 | +44.85% |
| Xtx Topco Ltd | 0.00% | 17,780 | $29,337 | $42,494 | +$13,157 | +44.85% | |
| American Century Companies Inc | 0.00% | 11,545 | $19,049 | $27,593 | +$8,544 | +44.85% | |
| Point72 Asset Management, L.P. | 0.00% | 11,398 | $18,807 | $27,241 | +$8,434 | +44.85% | |
| Vanguard Global Advisers, Llc | 0.00% | 9,447 | $15,588 | $22,578 | +$6,990 | +44.84% | |
| Russell Investments Group, Ltd. | 0.00% | 8,859 | $14,617 | $21,173 | +$6,556 | +44.85% | |
| Osaic Holdings, Inc. | 0.00% | 8,130 | $13,414 | $19,431 | +$6,017 | +44.85% | |
| Rhumbline Advisers | 0.00% | 7,380 | $12,177 | $17,638 | +$5,461 | +44.85% | |
| Royal Bank Of Canada | 0.00% | 6,728 | $11,000 | $16,080 | +$5,080 | +46.18% | |
| Tower Research Capital Llc (Trc) | 0.00% | 1,060 | $1,749 | $2,533 | +$784 | +44.85% | |
| Cwm, Llc | 0.00% | 735 | $1,411 | $1,757 | +$346 | +24.50% | |
| Barclays Plc | 0.00% | 654 | $1,079 | $1,563 | +$484 | +44.86% | |
| Arax Advisory Partners | 0.00% | 576 | $951 | $1,377 | +$426 | +44.76% | |
| Jpmorgan Chase & Co | 0.00% | 482 | $815 | $1,152 | +$337 | +41.35% | |
| Citigroup Inc | 0.00% | 400 | $660 | $956 | +$296 | +44.85% | |
| Fmr Llc | 0.00% | 190 | $314 | $454 | +$140 | +44.62% | |
| Bnp Paribas Financial Markets | 0.00% | 101 | $167 | $241 | +$74 | +44.54% | |
| Allworth Financial Lp | 0.00% | 57 | $95 | $136 | +$41 | +43.40% | |
| Essential Partners Llc | 0.00% | 41 | $68 | $98 | +$30 | +44.10% | |
| Farther Finance Advisors, Llc | 0.00% | 24 | $40 | $57 | +$17 | +43.40% | |
| Rothschild Investment Llc | 0.00% | 13 | $21 | $31 | +$10 | +47.95% | |
| Ifp Advisors, Inc | 0.00% | 11 | $18 | $26 | +$8 | +46.06% | |
| Wells Fargo & Company/Mn | 0.00% | 10 | $17 | $24 | +$7 | +40.59% | |
| Caitong International Asset Management Co., Ltd | 0.00% | 4 | $7 | $10 | +$3 | +36.57% | |
| True Wealth Design, Llc | 0.00% | 2 | $4 | $5 | +$1 | +19.50% | |
| Sjs Investment Consulting Inc. | 0.00% | 1 | $2 | $2 | +$0 | +19.50% |
Frequently asked questions about SIEB
Who owns the most SIEB stock?
The largest holders of SIEB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for SIEBERT FINANCIAL CORP (SIEB).
Is SIEB widely held by superinvestors?
Many widely followed stocks like SIEB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly SIEB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.