Rubrik RBRK Drops 7.5%, Shedding $1.5 Billion in Market Cap
As seen on the 24/7 Wall St. homepage on October 30, 2026.
A 7.5% slide to $122.30 knocks roughly $1.5 billion off a $19.7 billion cybersecurity name in a single session. Whether the $132.21 open becomes resistance is the level to keep an eye on.
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Rubrik closed at $122.30, down about 7.5% on the day after opening at $132.21.
Roughly $1.5 billion in market value was erased from a cybersecurity company trading at a significant premium to many of its peers in the data security space.
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A mid-session recovery attempt stalled well below the open, leaving the $132.21 level as the immediate overhead mark bulls need to reclaim. That open is the number to keep an eye on.
The $122 zone absorbed sustained selling pressure through the afternoon, and whether it holds as support or breaks lower is the key question for investors sizing up the risk here.
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Mentioned: RBRK