As of November 6, 2026, Calamos Strategic Total Return Fund is a publicly traded company (Nasdaq: CSQ); its largest reported holder is BlackRock, with 36.4% on Schedule 13G of September 8, 2026, then Equitable Holdings, Inc. (19.9%). The largest insider holding is John S. Koudounis, the president, with 15,830 shares, per Form 3/A of September 9, 2025 (Schedule 13G, September 8, 2026).
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Is Calamos Strategic Total Return Fund a real, registered company?
- Calamos Strategic Total Return Fund files with the SEC under CIK 1275214 (its SEC filings).
- Its shares are listed under the ticker CSQ on Nasdaq (SEC company record).
- business address in Naperville, Illinois, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under CALAMOS STRATEGIC TOTAL RETURN FUND in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Equitable Holdings, Inc. (filed 2026-09-11).
Who are Calamos Strategic Total Return Fund's owners and officers?
Calamos Strategic Total Return Fund: business address in Naperville, Illinois (Schedule 13G, 2026-09-11).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-09-11 | Equitable Holdings, Inc. | 19.9% |
| Schedule 13G, 2026-09-08 | Blackrock Portfolio Management LLC | 36.4% |
| Schedule 13G, 2026-09-08 | The Lincoln National Life Insurance Company | 10.6% |
| Schedule 13G/A, 2026-09-08 | Metlife Investment Management, LLC | 0% |
| Schedule 13G/A, 2026-07-28 | Apollo Management Holdings Gp, LLC | 15.2% |
| Schedule 13G/A, 2026-05-14 | Apollo Management Holdings Gp, LLC | 48% |
| Schedule 13G/A, 2026-02-13 | Apollo Management Holdings Gp, LLC | 48% |
| Schedule 13G/A, 2025-11-14 | Apollo Management Holdings Gp, LLC | 48% |
| Schedule 13G/A, 2025-08-14 | Apollo Management Holdings Gp, LLC | 48% |
Questions about who owns Calamos Strategic Total Return Fund
Who owns Calamos Strategic Total Return Fund?
On this page, 4 holders' latest ownership filings report 5% or more of Calamos Strategic Total Return Fund: Blackrock Portfolio Management LLC (36.4%, Schedule 13G, filed 2026-09-08), Equitable Holdings, Inc. (19.9%, Schedule 13G, filed 2026-09-11), Apollo Management Holdings Gp, LLC (15.2%, Schedule 13G/A, filed 2026-07-28) and The Lincoln National Life Insurance Company (10.6%, Schedule 13G, filed 2026-09-08).
Who are the largest shareholders of Calamos Strategic Total Return Fund?
By the share each holder's latest filing reports, the largest holders of Calamos Strategic Total Return Fund on this page are Blackrock Portfolio Management LLC (36.4%), Equitable Holdings, Inc. (19.9%) and Apollo Management Holdings Gp, LLC (15.2%).
When did Blackrock Portfolio Management LLC buy into Calamos Strategic Total Return Fund?
The filings give report dates, not purchase dates. The earliest filing from Blackrock Portfolio Management LLC on this page is the Schedule 13G, filed 2026-09-08, reporting 36.4%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 9 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Calamos Strategic Total Return Fund covers
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Who Runs It, And How To Reach Them
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Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Which insiders own Calamos Strategic Total Return Fund shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the president: 15,830 shares (Form 3/A, 2025-09-09).
Shares only: the company's cover page does not give one share count for a single class, so no percentage is worked out.
How much has Calamos Strategic Total Return Fund raised?
No fundraising or offering filing from Calamos Strategic Total Return Fund is on file with us.
Keep reading
More on Calamos Strategic Total Return Fund and the records around it.
Calamos Strategic Total Return Fund elsewhere on the record
- 5%+ stake filings Sep 2026
Companies that share a holder
- Equitable Holdings, Inc. also filed stake reports on 3 other companies: RIVERNORTH OPPORTUNITIES FUND, INC. (Oct 2026), AB Private Lending Fund (Aug 2026), ALLIANCEBERNSTEIN L.P. (Jul 2025)
- MetLife Investment Management, LLC also filed stake reports on 7 other companies: Calamos Global Dynamic Income Fund (Sep 2026), Carlyle Tactical Private Credit Fund (Apr 2026), abrdn Income Credit Strategies Fund (Jan 2026)
- Apollo Management Holdings GP, LLC also filed stake reports on 14 other companies: Carlyle Tactical Private Credit Fund (Aug 2026), CION Ares Diversified Credit Fund (Aug 2026), COMMUNITY HEALTH SYSTEMS INC (Aug 2026)
Related pages
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https://mentionfox.com/who-owns/calamos-strategic-total-return-fund