Siebert Financial Corp. (SIEB) Ownership
SIEB ownership summary
as of October 18, 2026- Institutions
- 5.7% of shares outstanding
- Insiders
- 62.72% of shares outstanding
- Shares outstanding
- 41.2M
- Float
- 22.0M shares available to trade
- Short interest
- 1.26% 186K shares short
- Days to cover
- 2.68 short interest down 19.0% vs prior month
- Institutions 5.71%
- Insiders 62.72%
- Other investors 31.58%
SIEB top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | CANTOR FITZGERALD, L. P. | 2.50% | 1.0M | $2.0M | +1.0M (0.0%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 1.33% | 550K | $1.1M | −899 (−0.2%) | June 30, 2026 |
| 3 | Geode Capital Management, LLC | 0.62% | 254K | $495,082 | −181,651 (−41.7%) | June 30, 2026 |
| 4 | Cetera Investment Advisers | 0.36% | 147K | $286,630 | +531 (+0.4%) | June 30, 2026 |
| 5 | Millennium Management LLC | 0.29% | 121K | $236,402 | +121,232 (0.0%) | June 30, 2026 |
| 6 | Vanguard Fiduciary Trust Co | 0.26% | 108K | $209,871 | −5,269 (−4.7%) | June 30, 2026 |
| 7 | BlackRock Inc | 0.25% | 102K | $198,795 | −677,640 (−86.9%) | June 30, 2026 |
| 8 | The Goldman Sachs Group Inc | 0.14% | 56K | $109,508 | +20,090 (+55.7%) | June 30, 2026 |
| 9 | Jane Street Group LLC | 0.14% | 56K | $108,753 | +55,771 (0.0%) | June 30, 2026 |
| 10 | State Street Corp | 0.12% | 51K | $98,768 | −93,584 (−64.9%) | June 30, 2026 |
| 11 | Citadel Advisors Llc | 0.12% | 49K | $95,367 | +21,561 (+78.8%) | June 30, 2026 |
| 12 | Susquehanna International Group, LLP | 0.12% | 48K | $94,201 | +19,643 (+68.5%) | June 30, 2026 |
| 13 | Northern Trust Corp | 0.10% | 42K | $82,508 | −96,313 (−69.5%) | June 30, 2026 |
| 14 | Bridgeway Capital Management, LLC | 0.09% | 35K | $68,849 | −21,953 (−38.3%) | June 30, 2026 |
| 15 | Dimensional Fund Advisors, Inc. | 0.06% | 26K | $51,283 | −8,542 (−24.5%) | June 30, 2026 |
| 16 | AQR Capital Management LLC | 0.06% | 25K | $49,282 | +25,273 (0.0%) | June 30, 2026 |
| 17 | UBS Group AG | 0.05% | 22K | $43,477 | −138,297 (−86.1%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 0.05% | 22K | $43,064 | +13,852 (+168.3%) | June 30, 2026 |
| 19 | Williams & Novak LLC | 0.05% | 22K | $42,705 | +6,100 (+38.6%) | June 30, 2026 |
| 20 | Qube Research & Technologies | 0.05% | 21K | $41,564 | +21,315 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 1.3M shares and 9 cut 1.2M.
SIEB top mutual fund and ETF holders
16 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 0.78% | 322K | $628,436 | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.28% | 114K | $223,012 | −615 (−0.5%) | August 31, 2026 |
| 3 | iShares Micro-Cap ETF | 0.12% | 48K | $93,070 | −329 (−0.7%) | September 30, 2026 |
| 4 | Fidelity Total Market Index | 0.09% | 38K | $74,498 | — | August 31, 2026 |
| 5 | Bridgeway Ultra-Small Company | 0.09% | 35K | $68,849 | −21,953 (−38.3%) | June 30, 2026 |
| 6 | Fidelity Series Total Market Index | 0.08% | 32K | $63,077 | — | August 31, 2026 |
| 7 | Fidelity Nasdaq Composite Index | 0.05% | 22K | $43,520 | — | August 31, 2026 |
| 8 | DFA US Micro Cap I | 0.03% | 11K | $21,735 | — | August 31, 2026 |
| 9 | Vanguard U.S. Eq Idx £ Acc | 0.02% | 9,447 | $18,422 | — | August 31, 2026 |
| 10 | Dimensional World Equity GBP Acc | 0.01% | 4,704 | $9,173 | — | August 31, 2026 |
| 11 | Dimensional International Core Eq Acc | 0.01% | 3,779 | $7,369 | — | August 31, 2026 |
| 12 | 1290 VT Micro Cap K | 0.01% | 2,773 | $5,407 | — | August 31, 2026 |
| 13 | Dimensional Global Core Equity USD Acc | 0.01% | 2,100 | $4,095 | — | August 31, 2026 |
| 14 | DFA US Vector Equity Class F | <0.01% | 1,623 | $3,165 | — | July 31, 2026 |
| 15 | Avantis US Small Cap Equity ETF | <0.01% | 1,398 | $2,726 | — | September 30, 2026 |
| 16 | Dimensional US Core Equity USD Acc | <0.01% | 1,081 | $2,108 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SIEB insider transactions
latest 8| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2020-04-16 | Richard Gebbia | Sell | $5.60 | 748,233 | $4.2M |
| 2020-01-24 | Gloria E Gebbia | Sell | $1.90 | 350,000 | $665,000 |
| 2019-12-16 | Gloria E Gebbia | Sell | $1.90 | 50,000 | $95,000 |
| 2019-09-25 | Gloria E Gebbia | Sell | $1.90 | 50,000 | $95,000 |
| 2019-03-28 | Kennedy Cabot Acquisition, Llc | Sell | $1.90 | 50,000 | $95,000 |
| 2018-05-22 | Francis V Cuttita | Sell | $9.30 | 4,000 | $37,200 |
| 2018-02-02 | Gloria E Gebbia | Sell | $5.04 | 288,537 | $1.5M |
| 2018-02-02 | Kennedy Cabot Acquisition, Llc | Sell | $5.04 | 70,000 | $352,800 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
SIEB shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SIEB
Institutional investors own 5.7% of Siebert Financial's shares and insiders 62.72%. The largest holder is CANTOR FITZGERALD, L. P. with 2.50% of the shares (1.0M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 9 reduced their stake in the latest filings. Short interest is 1.26% of the float, or 2.68 days of average trading volume. The share count rose 82.7% since 2014.
Related: SIEB key metrics. See the SIEB stock overview for the latest quote and news.
SIEB ownership FAQ
Who owns the most Siebert Financial stock?
The largest shareholders of Siebert Financial are CANTOR FITZGERALD, L. P. (2.50%), Vanguard Capital Management, LLC (1.33%), Geode Capital Management, LLC (0.62%), Cetera Investment Advisers (0.36%), Millennium Management LLC (0.29%).
What percentage of Siebert Financial is owned by institutions?
Institutions hold 5.7% of Siebert Financial's shares outstanding; insiders hold 62.72%.
Which funds own Siebert Financial?
The largest fund holders of Siebert Financial are Vanguard MStar Total Stk Mkt Idx Invest (0.78%), Fidelity Extended Market Index (0.28%), iShares Micro-Cap ETF (0.12%), Fidelity Total Market Index (0.09%), Bridgeway Ultra-Small Company (0.09%).
What is Siebert Financial's short interest?
186K shares of Siebert Financial were sold short, 1.26% of the float; at the average daily volume it would take 2.68 days to cover.
Are insiders buying or selling Siebert Financial?
Of the latest 8 reported insider transactions in Siebert Financial (since February 2, 2018), 0 were purchases and 8 were sales.
How many shares of Siebert Financial are outstanding?
Siebert Financial has 41.2M shares outstanding, of which 22.0M are in the public float.