BlackRock Portfolio Management LLC

Activist investor & 5%+ owner · SC 13D/13G filings

Total Filings

Stocks Covered

Latest Filing

Sep 16, 2025

Filings

CWEN.A

Clearway Energy, Inc.

SC 13D/A · Sep 16, 2025

55.4%

42.8M shares

MDIA

MediaCo Holding Inc.

SC 13D/A · Sep 8, 2025

46.1%

35.3M shares

MDIA

Mediaco Holding Inc.

SC 13D · Jul 3, 2025

46.1%

35.3M shares

HESM

Hess Midstream LP

SC 13D/A · May 30, 2025

0.3%

367K shares

HESM

Hess Midstream LP

SC 13D/A · May 12, 2025

11.9%

15.6M shares

HESM

Hess Midstream LP

SC 13D/A · May 8, 2025

13.9%

18.7M shares

HESM

Hess Midstream LP

SC 13D/A · May 7, 2025

13.9%

18.7M shares

HESM

Hess Midstream LP

SC 13D/A · Feb 19, 2025

13.9%

18.7M shares

HESM

Hess Midstream LP

SC 13D/A · Feb 12, 2025

15.1%

20.4M shares

CWEN.A

Clearway Energy, Inc.

SC 13D · Jan 30, 2025

55.5%

42.9M shares

HESM

Hess Midstream LP

SC 13D · Jan 30, 2025

23.3%

31.4M shares