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Siebert Financial
SIEB

47 hedge funds and large institutions have $3.93M invested in Siebert Financial in 2026 Q2 according to their latest regulatory filings, with 11 funds opening new positions, 12 increasing their positions, 22 reducing their positions, and 18 closing their positions.

New
Increased
Maintained
Reduced
Closed

2.09% less ownership

Funds ownership: 7.91% → 5.81% (-2.1%)

15% less funds holding

Funds holding: 55 → 47 (-8)

39% less first-time investments, than exits

New positions opened: 11 | Existing positions closed: 18

45% less repeat investments, than reductions

Existing positions increased: 12 | Existing positions reduced: 22

49% less capital inflows, than outflows

Capital inflows: $1.57M | Capital outflows: $3.09M

Holders
47
Holders Change
-8
Holders Change %
-14.55%
% of All Funds
0.56%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
11
Increased
12
Reduced
22
Closed
18
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Cantor Fitzgerald
Cantor Fitzgerald
New York
+$939K
2
Millennium Management
Millennium Management
New York
+$221K
3
Jane Street
Jane Street
New York
+$101K
4
AQR Capital Management
AQR Capital Management
Connecticut
+$46K
5
Citadel Advisors
Citadel Advisors
Florida
+$39.2K

Top Sellers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
-$1.23M
2
Geode Capital Management
Geode Capital Management
Massachusetts
-$331K
3
UBS Group
UBS Group
Switzerland
-$252K
4
Northern Trust
Northern Trust
Illinois
-$175K
5
State Street
State Street
Massachusetts
-$170K

SIEB Hedge Fund Activity: Q2 2026 in Review

47 of the 8,362 institutional investors tracked by Wall St. Rank reported a position in Siebert Financial (SIEB) for Q2 2026, worth a combined $3.93M — down 36% from $6.13M a quarter earlier.

Sellers outnumbered buyers: 18 funds closed out of SIEB and 11 opened new positions — a net loss of 7 holders — while 22 trimmed existing stakes and 12 added.

The largest buyer was Cantor Fitzgerald, opening a new position worth an estimated $939K. The largest seller was BlackRock, cutting an estimated $1.23M.

  • 47 institutional investors held Siebert Financial (SIEB) as of Q2 2026, down from 55 in Q1 2026.
  • Funds reported $3.93M of Siebert Financial stock for Q2 2026, down 36% quarter-over-quarter.
  • 11 funds opened new Siebert Financial positions in Q2 2026 and 18 closed out, a net change of -7 holders.
  • The largest Siebert Financial buyer in Q2 2026 was Cantor Fitzgerald, an estimated $939K added.
  • The largest Siebert Financial seller in Q2 2026 was BlackRock, an estimated $1.23M sold.

Based on aggregated 13F filings for Q2 2026.