Cathie Wood's ARK Investment used yesterday's weakness in Palantir (NYSE: PLTR) to buy another ~5.3 million shares. Shares were bought for the first time via the main ARK Innovation ETF (ARKK). The firm had held shares through the ARKW fund, which has ~4.1 million shares.

Shares of Palantir fell 7% on Thursday amid a lock-up expiration.

ARK discloses its trades daily M-F. Wood is famous for her ultra-bullish call on Tesla and is regarded as having the hottest hand on the Street currently.

Below is a full summary of trades made by ARK on 02/18/21: