Calamos S&P 500 Structured Alt Protection ETF - September
CPST
13 hedge funds and large institutions have $12.9M invested in Calamos S&P 500 Structured Alt Protection ETF - September in 2025 Q1 according to their latest regulatory filings, with 3 funds opening new positions, 0 increasing their positions, 2 reducing their positions, and 6 closing their positions.
0.18% more ownership
Funds ownership: 51.13% → 51.31% (+0.18%)
13% less capital invested
Capital invested by funds: $14.9M → $12.9M (-$1.97M)
19% less funds holding
Funds holding: 16 → 13 (-3)
50% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 6
100% less repeat investments, than reductions
Existing positions increased: 0 | Existing positions reduced: 2
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CP
Camelot Portfolios
Maumee,
Ohio
|
+$669K |
| 2 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$437K |
| 3 |
UBS Group
Zurich,
Switzerland
|
+$1.83K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Calamos Advisors
Naperville,
Illinois
|
-$1.4M |
| 2 |
OMC
Old Mission Capital
Chicago,
Illinois
|
-$617K |
| 3 |
Jane Street
New York
|
-$504K |
| 4 |
Wealth Enhancement Advisory Services
Plymouth,
Minnesota
|
-$244K |
| 5 |
JWCA
J.W. Cole Advisors
Tampa,
Florida
|
-$201K |
CPST Hedge Fund Activity: Q1 2025 in Review
13 of the 7,459 institutional investors tracked by Wall St. Rank reported a position in Calamos S&P 500 Structured Alt Protection ETF - September (CPST) for Q1 2025, worth a combined $12.9M — down 13% from $14.9M a quarter earlier.
Sellers outnumbered buyers: 6 funds closed out of CPST and 3 opened new positions — a net loss of 3 holders — while 2 trimmed existing stakes and 0 added.
The largest buyer was Camelot Portfolios, opening a new position worth an estimated $669K. The largest seller was Calamos Advisors, cutting an estimated $1.4M.
- 13 institutional investors held Calamos S&P 500 Structured Alt Protection ETF - September (CPST) as of Q1 2025, down from 16 in Q4 2024.
- Funds reported $12.9M of Calamos S&P 500 Structured Alt Protection ETF - September stock for Q1 2025, down 13% quarter-over-quarter.
- 3 funds opened new Calamos S&P 500 Structured Alt Protection ETF - September positions in Q1 2025 and 6 closed out, a net change of -3 holders.
- The largest Calamos S&P 500 Structured Alt Protection ETF - September buyer in Q1 2025 was Camelot Portfolios, an estimated $669K added.
- The largest Calamos S&P 500 Structured Alt Protection ETF - September seller in Q1 2025 was Calamos Advisors, an estimated $1.4M sold.
Based on aggregated 13F filings for Q1 2025.