Major Wall Street ETF issuers BlackRock and State Street are reportedly targeting Invesco Ltd.'s Nasdaq 100 franchise, threatening its long-standing near-exclusive control over the index.

BlackRock Inc. is reportedly preparing to challenge Invesco Ltd.'s long-held monopoly in tracking the Nasdaq 100 Index within the $13.7 trillion US exchange-traded fund industry.

Invesco Ltd. (IVZ) has released its preliminary assets under management (AUM) figures for February, reporting a total of $2.26 trillion.