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flag Adaptive Biotechnologies shares dropped 24.5% on Dec. 8, 2025, after executives sold millions in stock, raising investor concerns.

flag Adaptive Biotechnologies (ADPT) shares plunged 24.5% on December 8, 2025, after reports that company executives sold millions in stock, reducing insider holdings. flag The undisclosed details of the transaction sparked investor concern over leadership confidence, though no official explanation was provided. flag The sharp decline reflects market sensitivity to large insider sales, even without confirmation of motives. flag The company remains active in immune system diagnostics and therapies but has not commented on the sales or their implications for its strategy.

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