X0306 4 2021-05-03 0 0001426332 NGM BIOPHARMACEUTICALS INC NGM 0001642996 CHEN JIN-LONG 333 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080 1 1 0 0 Chief Scientific Officer Common Stock 2021-05-03 4 S 0 25000 27.62 D 920005 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 15, 2020. Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $27.12 to $27.90. The reporting person has provided to the issuer, and undertakes to provide to the staff of the Commission or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the range. /s/ Jin-Long Chen 2021-05-04