Estimated market cap $3.10BShares outstanding from the company’s latest SEC filing (all share classes, each priced at its own close; ADRs converted to ADS) × last close from Tiingo. Updated daily. This figure: shares as of Apr 30, 2026, last close Nov 13, 2026.160.37M shares, shares as of Apr 30, 2026CIK 1275214The SEC’s Central Index Key, the number it uses to identify every company and person that files.
Insider trades, 12 mo
—
No open-market trades
Congress trades, 24 mo
—
No disclosed trades
13F holders
…
Lobbying, 12 mo
—
No lobbying filings
Federal contracts, 12 mo
—
None matched
Ask your AI:
Latest 10-Q
What changed in Calamos Strategic Total Return Fund's latest quarterly report, compared with the one before.
We have not read a recent 10-Q for this company yet.
Insider trades
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
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13F holders
Funds that report this stock, checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
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Top 10 holders.Premium lists every holder, with CSV downloads.
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
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Lobbying
What Calamos Strategic Total Return Fund and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
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Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
13F holders, Q3 2026Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
153
14.8% of shares · 57 added
Insider trades
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
No open-market insider trades reported since Jan 30, 2025. Insiders have two business days to file.
Recent insider trades
How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss.
153 funds report CSQ. Values checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
Q3 2026. 8 new, 57 added to, 34 trimmed, 80 exited since Q2 2026.
Download CSVEvery fund that holds CSQ, not only these ten. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.
Trades by members of Congress
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
Recent congressional trades
Member
Transaction
Amount
Traded → disclosed
Since tradeHow the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss.
What Calamos Strategic Total Return Fund and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
No recent lobbying filings for this company.
Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
Funds holding the stock
Shares they report
Funds holding the stock by quarter
Q2 2013
67
—
16.76M
$170.0M
Q3 2013
78
+11
17.69M
$177.0M
Q4 2013
93
+15
18.83M
$205.0M
Q1 2014
99
+6
18.57M
$206.5M
Q2 2014
91
-8
18.79M
$225.7M
Q3 2014
89
-2
19.26M
$225.2M
Q4 2014
96
+7
18.70M
$747.6M
Q1 2015
107
+11
20.11M
$757.9M
Q2 2015
101
-6
20.71M
$227.1M
Q3 2015
101
0
21.47M
$199.6M
Q4 2015
118
+17
23.83M
$236.1M
Q1 2016
112
-6
22.03M
$209.4M
Q2 2016
111
-1
22.69M
$224.2M
Q3 2016
101
-10
22.54M
$231.6M
Q4 2016
113
+12
25.54M
$262.6M
Q1 2017
105
-8
26.08M
$291.0M
Q2 2017
103
-2
23.82M
$280.4M
Q3 2017
106
+3
24.55M
$297.8M
Q4 2017
124
+18
25.88M
$312.7M
Q1 2018
121
-3
23.58M
$279.4M
Q2 2018
121
0
23.21M
$295.7M
Q3 2018
130
+9
24.18M
$326.5M
Q4 2018
130
0
24.86M
$263.3M
Q1 2019
130
0
24.77M
$306.9M
Q2 2019
126
-4
24.35M
$310.8M
Q3 2019
127
+1
24.36M
$313.7M
Q4 2019
133
+6
24.92M
$338.9M
Q1 2020
137
+4
24.79M
$242.6M
Q2 2020
125
-12
24.76M
$307.8M
Q3 2020
133
+8
25.16M
$338.7M
Q4 2020
149
+16
25.43M
$401.5M
Q1 2021
149
0
24.85M
$432.2M
Q2 2021
148
-1
25.31M
$460.4M
Q3 2021
143
-5
25.94M
$459.6M
Q4 2021
168
+25
27.14M
$523.3M
Q1 2022
158
-10
26.87M
$471.2M
Q2 2022
150
-8
27.76M
$364.0M
Q3 2022
155
+5
28.60M
$357.6M
Q4 2022
163
+8
29.07M
$389.1M
Q1 2023
168
+5
29.31M
$410.4M
Q2 2023
159
-9
29.63M
$437.1M
Q3 2023
167
+8
30.03M
$422.6M
Q4 2023
172
+5
34.67M
$517.2M
Q1 2024
175
+3
39.39M
$644.5M
Q2 2024
188
+13
32.64M
$546.0M
Q3 2024
189
+1
33.32M
$573.7M
Q4 2024
202
+13
34.06M
$603.5M
Q1 2025
203
+1
34.55M
$559.2M
Q2 2025
204
+1
38.01M
$693.2M
Q3 2025
211
+7
37.65M
$725.6M
Q4 2025
217
+6
38.67M
$742.4M
Q1 2026
220
+3
38.65M
$661.9M
Q2 2026
224
+4
39.06M
$802.4M
Q3 2026
153
-71
23.70M
$483.7M
Each point is a quarter-end, from Q2 2013 to Q3 2026. A fund's 13F lists its long positions in US-listed securities as of the last day of the quarter and arrives up to 45 days later, so each point shows holdings at quarter-end, not on the day they were reported.
Common shares only; options and bonds are left out. When a fund amends a report, the amended version is the one counted.
The history follows the company's current CUSIP number (128125101). If the company's shares were ever re-issued under a different CUSIP, the quarters before the change are not part of this series, so the first point (Q2 2013) can be later than the stock's first appearance in 13F reports.
Share counts are adjusted for stock splits; none took place between these quarters. Values are in dollars as reported at the time and are not adjusted.
A quarter appears once our daily update has built its summary. If a summary cannot be built, older reports are kept and the chart shows the quarters it has until the next update repairs it.