DEEP FISSION INC (FISN) Institutional Ownership and Insiders Activity

DEEP FISSION INC (FISN) is widely held by institutional investors, with 24 firms reporting positions valued at approximately $25.29M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Blue Owl Capital Holdings Lp is the largest disclosed holder, reporting approximately $14.72M in FISN holdings in its latest filing.

Institutional ownership remains highly concentrated, with Blue Owl Capital Holdings Lp representing the majority of disclosed value.