Loomis, Sayles & Co., L.P.

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

Total Filings

Stocks Covered

Latest Filing

Feb 12, 2026

Filings

SEI Investments Co

SC 13G/A · Feb 12, 2026

7.2%

8.8M shares

SEI Investments Co

SC 13G/A · Nov 13, 2025

7.3%

9.0M shares

SEI Investments Co

SC 13G/A · Aug 13, 2025

7.1%

8.9M shares

EchoStar Corp

SC 13G/A · May 15, 2025

3.0%

4.9M shares

SEI Investments Co

SC 13G/A · May 15, 2025

6.9%

8.7M shares

EchoStar Corp

SC 13G · Feb 12, 2025

6.0%

8.9M shares

SEI Investments Co

SC 13G/A · Feb 12, 2025

6.9%

8.9M shares

SEI Investments Co

SC 13G/A · Nov 14, 2024

7.0%

9.2M shares