Fountain Nathan B

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	Company	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value
2026-06-10	2026-06-09	Acumen Pharmaceuticals Inc (ABOS)	S Sale	38,405 +15.9% 420.51 US$782,521	38,405 +15.9%	420.51	US$782,521
2026-06-09	2026-06-09	Acumen Pharmaceuticals Inc (ABOS)	PrS Proposed sale	83,876 165.67 US$2,445,798	83,876	165.67	US$2,445,798
2021-07-08	2021-07-06	Acumen Pharmaceuticals Inc (ABOS)	B Purchase	98,479 +40.3% 36.44 US$1,022,742	98,479 +40.3%	36.44	US$1,022,742