ALNYLAM PHARMACEUTICALS INC

Ticker: ALNY CUSIP: 02043Q107 Class: EQTY

Banco Santander, S.A.'s Holding History (CIK: 0000891478)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 731 Value ($000) $291 Avg Close $442.56 Range $387.03 - $495.55

Q2 2025

Shares 1,245 Value ($000) $406 Avg Close $276.71 Range $205.87 - $327.21

Q1 2022

Shares 40,000 Value ($000) $6,532 Avg Close $152.35 Range $125.00 - $174.66

Q2 2020

Shares 3,429 Value ($000) $508 Avg Close $134.81 Range $98.01 - $158.37

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	731	$291	$442.56	$387.03 - $495.55
Q2 2025	1,245	$406	$276.71	$205.87 - $327.21
Q1 2022	40,000	$6,532	$152.35	$125.00 - $174.66
Q2 2020	3,429	$508	$134.81	$98.01 - $158.37