ARK rotates out of Palantir and Tempus into Rocket Lab and Block, across five ETFs and several sessions

ARK rotated out of AI and software winners and into space and fintech over the week to September 4, buying more than 705,000 shares of RKLB worth about $45 million and selling roughly $26 million of PLTR . The single largest identified block was XYZ, where ARK bought 456,059 shares for $38,112,850 across its ARKK, ARKW and ARKF ETFs on August 31. Palantir came out the same day: 139,456 shares for $25,979,258 across the same three funds.

The Rocket Lab position was built in stages rather than in one buy, which is why the reported figures differ legitimately across coverage. ARK acquired 200,303 shares for $12,897,510 through ARKK alone on August 31, then more than 504,000 shares worth approximately $31.6 million on September 1 through ARKK, ARKQ and ARKX. The 705,000-share, roughly $45 million figure is the weekly aggregate of those and subsequent trades, not a single dramatic purchase. ARK also added 28,589 shares of HOOD worth about $3.5 million, taking Robinhood to the seventh largest holding in ARK Innovation at 4.28% of the fund, and sold 7,450 shares of AMD through ARKQ and ARKX.

One number in this story is genuinely unresolved and should be read as such. On Tempus AI, the precise fund-attributed figure is 169,672 shares for $10,865,794 sold through ARKK on August 31, while weekly recaps cite $27.7 million trimmed with no share count attached. Those may be a single day against a full week, but no source states a weekly Tempus total explicitly, so both are recorded rather than reconciled.

Two framings worth correcting for anyone tracking these trades. This was not one fund: ARKK, ARKW, ARKF, ARKQ and ARKX all transacted across the week, and which fund bought what changes the exposure any individual ARK holder actually got. And the concentration story running alongside this is separate from the rebalancing: within ARK Innovation, which holds 47 positions and approximately $6.6 billion in assets, TSLA sits at 9.62% and SpaceX at 6.28%, so the two largest positions are both Elon Musk companies at roughly a sixth of the fund, with Circle Internet Group third at 6.06%. That concentration showed on Friday September 5, when Tesla fell 5.92% and accounted for more than half of ARKK's 1.06% decline. The rotation into Rocket Lab and Block does not change that picture materially.

Related Stocks

• RKLB
• PLTR
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