What is CPST's market cap?

$36.50M, based on the Sep 28 close of $28.08.

NYSE Arca · CPST

Calamos S&P 500 Structured Alt Protection ETF - September (CPST)

$28.08−0.21%

Close Sep 28, 2026 · split-adjusted

Sep 28, 2026$28.08▲ 5.05% in range

Sep 29, 2025Low $26.68 · High $28.18Sep 28, 2026

What changed · written from our data

As of Sep 28, 2026

Calamos S&P 500 Structured Alt Protection ETF - September closed at $28.08 on Sep 28, down 0.21%, 0.3% below its 52-week closing high. Volume of 125 shares was 0.01× its 20-day average (below normal).

Split-adjusted performance: -0.0% over one month, +4.5% over six months, +5.2% over one year.

In the quarter ended Mar 31, 2021, revenue was $17.86M, up 54.5% from a year earlier, with a net margin of -26.6%.

Short interest was 3.9K shares at the Sep 15 settlement, down 66.8% from the prior report (1.0 days to cover).

Market cap$36.5M1.3M shares

Revenue · quarter$17.9M+54.5% YoY

Diluted EPS$-0.38—

P/E · TTM—P/S 0.5×

Net margin-26.6%Gross -14.3%

Dividend yieldNone

52-week range26.68 – 28.18−0.3% from high

Volume1250.01× 20-day avg

Volatility · 60d1.7%Annualised

Short % of float—1.0 days to cover

Net cash-$16.3MCash $49.5M

Next earnings—Not scheduled

Split-adjusted performance

1W −0.1%1M 0.0%3M +1.0%6M +4.5%YTD +3.9%1Y +5.2%3Y —5Y —

Earnings reactions

History →

No reported quarters with price history yet.

Rank within industry

Not enough peers to rank

6-month momentum—

Revenue growth—

Net margin—

Value (low P/E)—

Size—

Short interest

Details →

Shares short3.9K−66.8% vs prior

Days to cover1.0Settled Sep 15

% of float—

Short vol. 10d77.6%of daily volume

News about Calamos S&P 500 Structured Alt Protection ETF - September

All news →

No recent articles focused on Calamos S&P 500 Structured Alt Protection ETF - September.

Quick answers

What is CPST's market cap?: $36.50M, based on the Sep 28 close of $28.08.

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology