Calamos Advisors’s Calamos S&P 500 Structured Alt Protection ETF - September CPST Stock Holding History

Calamos Advisors’s Portfolio CPST Stock Details CPST Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$9.6M	Sell	345,128 -87,916	-20%	-$2.42M	0.03%	419
2026 Q1	$11.7M	Buy	433,044 +146,291	+51%	+$3.97M	0.04%	371
2025 Q4	$7.75M	Buy	286,753 +30,428	+12%	+$818K	0.03%	462
2025 Q3	$6.85M	Sell	256,325 -2,101	-0.8%	-$55.6K	0.03%	495
2025 Q2	$6.75M	Buy	258,426 +54,201	+27%	+$1.38M	0.03%	497
2025 Q1	$5.14M	Sell	204,225 -55,260	-21%	-$1.4M	0.02%	513
2024 Q4	$6.57M	Buy	259,485 +82,917	+47%	+$2.09M	0.03%	482
2024 Q3	$4.43M	Buy	+176,568	New	+$4.4M	0.02%	542

Other funds holding CPST

CWM

Calamos Wealth Management Naperville, Illinois $3.31B AUM 32.95% 1-Year Est. Return

Camelot Portfolios Maumee, Ohio $143M AUM 14.82% 1-Year Est. Return

Commonwealth Equity Services Waltham, Massachusetts $79.5B AUM 27.1% 1-Year Est. Return

BFS

Burkett Financial Services Rock Hill, South Carolina $320M AUM 19.24% 1-Year Est. Return

CFD

Creative Financial Designs Kokomo, Indiana $2.1B AUM 23.1% 1-Year Est. Return

Calamos Advisors's CPST Position: Q2 2026 in Review

Calamos Advisors reduced its Calamos S&P 500 Structured Alt Protection ETF - September (CPST) stake by 20% in Q2 2026, selling an estimated $2.42M and leaving 345,128 shares worth $9.6M. The position accounts for 0.03% of the portfolio, ranked #419.

Calamos Advisors first reported a position in CPST in Q3 2024 and has held it in 8 quarters since. The position peaked at $11.7M in Q1 2026. 6 funds tracked by Wall St. Rank hold CPST as of Q2 2026.

Calamos Advisors held 345,128 shares of Calamos S&P 500 Structured Alt Protection ETF - September worth $9.6M as of Q2 2026.
Calamos Advisors sold 87,916 Calamos S&P 500 Structured Alt Protection ETF - September shares in Q2 2026, an estimated $2.42M.
Calamos S&P 500 Structured Alt Protection ETF - September made up 0.03% of Calamos Advisors's portfolio in Q2 2026, its #419 holding.
Calamos Advisors first reported a position in Calamos S&P 500 Structured Alt Protection ETF - September in Q3 2024 and has held it in 8 quarters since.
Calamos Advisors's Calamos S&P 500 Structured Alt Protection ETF - September position peaked at $11.7M in Q1 2026.
6 funds tracked by Wall St. Rank held Calamos S&P 500 Structured Alt Protection ETF - September as of Q2 2026.

Based on Calamos Advisors's 13F filing for Q2 2026, filed 31 Jul 2026.