William Blair Investment Management

William Blair Investment Management’s Kosmos Energy KOS Stock Holding History

William Blair Investment Management’s Portfolio KOS Stock Details KOS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q2	–	Sell	-17,169,011	Closed	-$39.1M	–	444
2025 Q1	$39.1M	Sell	17,169,011 -1,574,723	-8%	-$4.65M	0.11%	165
2024 Q4	$64.1M	Buy	18,743,734 +4,114,499	+28%	+$15.7M	0.16%	133
2024 Q3	$59M	Buy	14,629,235 +1,008,381	+7%	+$4.91M	0.15%	127
2024 Q2	$75.5M	Buy	13,620,854 +1,624,495	+14%	+$9.47M	0.2%	122
2024 Q1	$71.5M	Sell	11,996,359 -197,987	-2%	-$1.19M	0.18%	131
2023 Q4	$81.8M	Sell	12,194,346 -504,658	-4%	-$3.53M	0.24%	118
2023 Q3	$104M	Buy	12,699,004 +2,559,942	+25%	+$18.1M	0.35%	92
2023 Q2	$60.7M	Sell	10,139,062 -5,081,035	-33%	-$33.1M	0.19%	126
2023 Q1	$113M	Buy	+15,220,097	New	+$111M	0.39%	88

Other funds holding KOS

BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return

Grantham, Mayo, Van Otterloo & Co (GMO)

Grantham, Mayo, Van Otterloo & Co (GMO) Boston, Massachusetts $39.1B AUM 28.69% 1-Year Est. Return

American Century Companies

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Hotchkis & Wiley Capital Management

Hotchkis & Wiley Capital Management Los Angeles, California $32.4B AUM 17.21% 1-Year Est. Return

Patient Capital Management Baltimore, Maryland $2.68B AUM 43.59% 1-Year Est. Return

Equinox Partners Investment Management Stamford, Connecticut $245M AUM 225.58% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Geode Capital Management

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Dimensional Fund Advisors

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return