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SCHEDULE 13G Filed 2026-09-08 Event — SEC 0001493152-26-041782 →

BlackRock Portfolio Management LLC → Calamos Strategic Total Return Fund CSQ

Stake: — Shares: — Class: Series H Mandatory Redeemable Preferred Shares

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)
0 transactions
0 buys · 0 sales · 0 awards/exercises
Issuer Cluster
3 13D/G filings on this issuer
2 other filings besides this one
Filer Track Record
57 filings by this filer
56 other filings in the data moat
Short Interest · settle 2026-08-31
DTC 1.00
96,952 shares short · +125.4% vs prior

Other 13D/G Filings on Calamos Strategic Total Return Fund

FiledFormFilerStakeShares
2026-09-11 SCHEDULE 13G Equitable Holdings, Inc. — — view →
2026-09-08 SCHEDULE 13G LINCOLN NATIONAL LIFE INSURANCE CO /IN/ — — view →

Other Filings by BlackRock Portfolio Management LLC

FiledFormIssuerStakeShares
2026-09-08 SCHEDULE 13G Calamos Convertible Opportunities and Income Fund — — view →
2026-09-08 SCHEDULE 13G Calamos Convertible & High Income Fund — — view →
2026-09-08 SCHEDULE 13G Calamos Global Dynamic Income Fund — — view →
2026-09-08 SCHEDULE 13G Calamos Global Total Return Fund — — view →
2026-09-04 SCHEDULE 13G iShares S&P GSCI Commodity-Indexed Trust — — view →
2026-09-04 SCHEDULE 13G MYRIAD GENETICS INC — — view →
2026-09-04 SCHEDULE 13G/A iShares iBonds Dec 2056 Term Treasury ETF — — view →
2026-09-04 SCHEDULE 13G/A ISHARES CURRENCY HEDGED MSCI JAPAN ETF — — view →
2026-09-04 SCHEDULE 13G/A iShares iBonds Dec 2036 Term Corporate ETF — — view →
2026-09-04 SCHEDULE 13G/A iShares iBonds 2033 Term High Yield and Income ETF — — view →
2026-09-04 SCHEDULE 13G/A iShares S&P 500 3% Capped ETF — — view →
2026-09-04 SCHEDULE 13G/A Galiano Gold Inc. — — view →
2026-09-04 SCHEDULE 13G/A iShares, Inc. — — view →
2026-09-04 SCHEDULE 13G/A iShares, Inc. — — view →
2026-09-04 SCHEDULE 13G/A iShares, Inc. — — view →
2026-09-04 SCHEDULE 13G/A iSHARES TRUST — — view →
2026-09-04 SCHEDULE 13G/A iShares Enhanced Large Cap Core Active ETF — — view →
2026-09-04 SCHEDULE 13G/A iShares Emerging Markets Bond Active ETF — — view →
2026-09-04 SCHEDULE 13G/A iShares iBonds Dec 2046 Term Treasury ETF — — view →
2026-09-04 SCHEDULE 13G/A iShares High Yield Active ETF — — view →
Showing 20 of 56

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