CrowdStrike Holdings Inc. /zigman2/quotes/212513426/composite CRWD -1.05% shares rallied Tuesday after the cybersecurity company’s stock was added to the Nasdaq 100 Index /zigman2/quotes/210598364/realtime NDX +0.63% . CrowdStrike shares surged as much as 9%, touching an intraday high of $267.98. Late Monday, Nasdaq announced that CrowdStrike would replace integrated-circuit maker Maxim Integrated Products Inc. on the index. The Nasdaq 100 is an index comprising the 100 largest Nasdaq-listed non-financial companies. At last check, CrowdStrike had a market cap of just over $60 billion, while Maxim had a cap of about $28 billion. CrowdStrike shares have surged 140% over the past 12 months, compared with a 32% gain on the Nasdaq 100.