13FBOX
AMBAC FINL GROUP INC · 13F Institutional Holdings
Options Calculator Rankings
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AMBAC FINL GROUP INC

Institutions
3
Combined AUM (Q2 2026)
$3.6M
Combined Shares (Q2 2026)
581,900
Overall Trend
Increase
All institutions combined
Basis: holder count and combined value / shares merge all share classes of the same company (e.g. Class A / C); each institution is counted once, and value & shares are the sum across classes.
📥 Inflow (Q1 2026→Q2 2026)
+290,800
1 institutions added · 0 new buys
Est. buy amount
📤 Outflow (Q1 2026→Q2 2026)
-250,800
2 institutions reduced · 0 exits
Est. sell amount
⚖️ Net Share Change
+40,000
Net Buy
💰 Est. Net Value
≈ —
est. price
Latest AUM (Q2 2026)
$3.6M
Institutions
3
New Buys
0
Adds
1
Reduces
2
Exits
0
Unchanged
0
Ownership TrendPortfolio %Prev Q %RankQ2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
SIMPLEX TRADING, LLC
<0.01%<0.01%#2$2.0M312,600$101,37021,800+290,800+1,333.94%Add
GROUP ONE TRADING LLC
<0.01%<0.01%#1$1.1M181,000$1.9M399,500-218,500-54.69%Reduce
IMC-Chicago, LLC
<0.01%<0.01%#3$550,99288,300$560,790120,600-32,300-26.78%Reduce

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow