MAREX GROUP PLC

Ticker: MRX CUSIP: G5S37H101 Class: Common Stock

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q4 2025

Shares 1,738,927 Value ($000) $66,705 Avg Close $33.95 Range $27.79 - $40.39

Q3 2025

Shares 368,449 Value ($000) $12,387 Avg Close $35.86 Range $32.08 - $40.08

Q2 2025

Shares 810,791 Value ($000) $32,002 Avg Close $41.19 Range $32.61 - $48.76

Q1 2025

Shares 1,676,359 Value ($000) $59,209 Avg Close $34.28 Range $29.91 - $39.41

Q4 2024

Shares 2,504,726 Value ($000) $78,072 Avg Close $27.46 Range $22.62 - $31.93

Q3 2024

Shares 1,437,590 Value ($000) $33,956 Avg Close $21.77 Range $17.65 - $25.49

Q2 2024

Shares 1,441,762 Value ($000) $28,835 Avg Close $19.14 Range $17.65 - $22.83

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,738,927	$66,705	$33.95	$27.79 - $40.39
Q3 2025	368,449	$12,387	$35.86	$32.08 - $40.08
Q2 2025	810,791	$32,002	$41.19	$32.61 - $48.76
Q1 2025	1,676,359	$59,209	$34.28	$29.91 - $39.41
Q4 2024	2,504,726	$78,072	$27.46	$22.62 - $31.93
Q3 2024	1,437,590	$33,956	$21.77	$17.65 - $25.49
Q2 2024	1,441,762	$28,835	$19.14	$17.65 - $22.83