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CSQ · Calamos Strategic Total Return Fund

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$20.74 +0.06 (+0.29%) At close · Aug 21
Market Cap
$3.33B
Shares
160.37M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 224
Total Value: $801,858,274
Total Shares: 38,846,758

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 224 13F filers · Δ vs Mar 31, 2026
Top Holder
12.5%
Sep 2023 → Jun 2026 · range 12.3% – 15.3%
−0.1 pts
Top 5
47.4%
Sep 2023 → Jun 2026 · range 46.6% – 56.1%
+0.1 pts
Top 10
66.4%
Sep 2023 → Jun 2026 · range 65.7% – 72.1%
+0.5 pts
HHI
585
Sep 2023 → Jun 2026 · range 571 – 770
Broadly held+1

Quarterly Activity

vs Mar 31, 2026
New
19
Increased
84
Decreased
50
Sold Out
15
Unchanged
71
Holder count: +4
Institutional value: +20.9%
Shares held: +0.7%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 224
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1275214 CUSIP 128125101 13F (30d) 183 filings 178 filers Investor relations