Liu Curtis

• 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
2026-06-03	2026-06-01	Amplitude Inc (AMPL)	PlS Planned sale	42,160 +19.7% 168.56 US$1,971,677	42,160 +19.7%	168.56	US$1,971,677
2026-06-01	2026-06-01	Amplitude Inc (AMPL)	PrS Proposed sale	23,123 440.05 US$2,568,898	23,123	440.05	US$2,568,898
2026-05-06	2026-05-04	Amplitude Inc (AMPL)	PlS Planned sale	99,564 -49.9% 192.83 US$3,986,334	99,564 -49.9%	192.83	US$3,986,334
2026-03-10	2026-03-06	Amplitude Inc (AMPL)	PlS Planned sale	33,201 -5.2% 8.01 US$265,840	33,201 -5.2%	8.01	US$265,840
2026-03-09	2026-03-05	Amplitude Inc (AMPL)	PlS Planned sale	30,061 -4.5% 8.00 US$240,539	30,061 -4.5%	8.00	US$240,539
2026-03-05	2026-03-05	Amplitude Inc (AMPL)	PrS Proposed sale	80,848 7.72 US$624,147	80,848	7.72	US$624,147