Silicon Valley Bank CEO Greg Becker sold nearly $30 million of stock over the past two years, raising new questions over insider stock sales.

Becker sold $3.6 million worth of shares on Feb. 27, just days before the bank disclosed a large loss that triggered its stock slide and collapse. The sale capped two years of stock sales by Becker that totaled $29.5 million, according to data from Smart Insider. He sold at prices ranging from $287 a share to $598 a share.

Becker also purchased options, at lower exercise prices, as part of many of the sales and maintained his equity ownership stake.