RK Capital Management, LLC/FL

RK Capital Management's first-quarter filing contains one of the most dramatic single-quarter portfolio pivots on record: the filer went from running an 85%-plus concentrated technology and momentum book in December 2025 — heavy in Nvidia, Tesla, Amazon, Broadcom, and Palantir — to a 98.6% S&P 500 ETF (SPY) position by March 2026, adding roughly $2.55B in a single quarter and essentially abandoning stock selection entirely. The selling was comprehensive: Nvidia ($1.86B), Tesla ($616M), Amazon ($606M), Broadcom ($197M), AMD ($154M), Palantir ($124M), UnitedHealth ($122M), and Netflix ($122M) were all liquidated. A tiny satellite sleeve remains — Silvergate's PSLV precious-metals ETF, a small Sars-CoV-era biotech position in ArcellX, Micro Strategy's BITO Bitcoin ETF carryover, a handful of legacy Armada Acquisition SPACs, and speculative micro-caps — but the portfolio's character has fundamentally changed. The question this filing raises is whether this represents a deliberate strategy shift to passive indexing, a liquidation in preparation for a restructured mandate, or an interim repositioning ahead of a concentrated re-deployment. Either way, it is a whaleScore-tier filing that documents the end of an experiment in concentrated active management.