Dennis Washington

Dennis Washington is an American businessman, born in 1934, associated with Montana and the diversified industry. His estimated net worth is ~$7.8B Wikidata.

Business & SEC Activity

SEC EDGAR identifies Washington as a reporting person with 38 insider-related filings. His recent filings include amendments to Schedule 13D, a form used to update disclosures by investors who own more than 5% of a public company’s shares; the listed filings span 2016 through November 2022 and include Seaspan Corp. and Atlas Corp. SEC EDGAR.

Philanthropy

Three organizations named Washington Foundation appear in the available 990 data. The Nashville, Tennessee foundation reported $10.1M in assets and $701,820 in grants paid in tax year 2023; the Manvel, Texas foundation reported $1 in assets and $11,217 in grants paid in 2022; and the Denmark, South Carolina foundation reported $0 assets and $0 grants paid. Together, these filings report $10.1M in assets and $713,037 in grants paid ProPublica 990.

Political Activity

FEC data contains at least 100 federal contributions in the most recent 100 records on file, covering only March 13, 2020 through June 1, 2026. Those sampled contributions total $699,162.53: $590,012.53 is classified as Unknown, $100,600 as Republican, and $8,550 as Democratic; the largest listed recipients are 34N22, Inc. ($500,000), Senate Georgia Battleground Fund ($25,000), Graham Victory 2020 ($20,600), NRSC ($19,400), and Montana Republican State Central Committee ($12,500) FEC.

These donations are matched to this person by name only, so some may belong to a different person with the same name: FEC filings can include a donor's employer and city, but our matching does not check them against what we know about this person.