Sirenia Capital Management LP Reports New 6.7% Stake in AnaptysBio, Inc. (ANAB)

On May 15, 2026, Sirenia Capital Management LP and Alex Silverstein filed a Schedule 13G disclosing a new beneficial ownership position in AnaptysBio, Inc. (ANAB). The reporting persons collectively hold 1,920,402 shares of Common Stock, representing 6.7% of the company's outstanding shares as of February 27, 2026. The shares are held through the Sirenia Fund and a managed account, with Sirenia Capital Management LP serving as the investment adviser. Alex Silverstein, as the managing member of the general partner of Sirenia, shares voting and dispositive power over these securities. The filing indicates that the acquisition was made in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. This filing marks a significant new position for the investment firm, as the previous ownership percentage was reported as 0.0%. The principal business office for the reporting persons is located in Miami Beach, Florida.