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Yes. I heard that NASDEQ owns a part of Circle. Circle bought Poloniex. I'm not 100% sure about that NASDEQ owning circle however. But Circle is backed by Goldman Sachs.
https://www.nasdaq.com/article/circle-leaps-into-exchange-business-with-poloniex-acquisition-cm927016

First Crypto Exchange Using Nasdaq’s Tech Announces Launch, Excluding US Customers
https://cointelegraph.com/news/first-crypto-exchange-using-nasdaqs-tech-announces-launch-excluding-us-customers

Nasdaq May Launch Its Own Cryptocurrency Exchange If Regulation Allows for It
https://themerkle.com/nasdaq-may-launch-its-own-cryptocurrency-exchange-if-regulation-allows-for-it/