Filing

13F-HR

13F-HR

0000900440-26-000035·TETRAD CORP

Filing metadata

Accession number: 0000900440-26-000035
Form type: 13F-HR
Filer: TETRAD CORP
CIK: CIK 883597
Filed: Apr 09, 2026
Reporting period: Mar 31, 2026
Description: Institutional holdings

Documents

0000900440-26-000035-index.htm

Complete submission

0000900440-26-000035.txt

directory listing

Filed by