Castleark Management’s Somnigroup International SGI Stock Holding History

Castleark Management’s Portfolio SGI Stock Details SGI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$164K	Sell	2,090 -46,695	-96%	-$3.42M	﹤0.01%	297
2026 Q1	$3.61M	Sell	48,785 -2,450	-5%	-$213K	0.12%	173
2025 Q4	$4.57M	Buy	51,235 +1,690	+3%	+$148K	0.13%	162
2025 Q3	$4.18M	Buy	49,545 +1,725	+4%	+$136K	0.12%	158
2025 Q2	$3.25M	Sell	47,820 -1,350	-3%	-$84.9K	0.1%	155
2025 Q1	$2.94M	Buy	+49,170	New	+$2.98M	0.1%	162
2023 Q2	–	Sell	-99,090	Closed	-$3.91M	–	321
2023 Q1	$3.91M	Hold	99,090	–	–	0.19%	121
2022 Q4	$3.4M	Buy	+99,090	New	+$2.98M	0.18%	125
2014 Q3	–	Sell	-607,092	Closed	-$9.06M	–	346
2014 Q2	$9.06M	Buy	+607,092	New	+$8.14M	0.25%	89
2013 Q4	–	Sell	-722,452	Closed	-$10.1M	–	398
2013 Q3	$10.1M	Buy	+722,452	New	+$7.5M	0.29%	86

Other funds holding SGI

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Select Equity Group New York $20.2B AUM 17.52% 1-Year Est. Return

WPL

WINDACRE PARTNERSHIP LLC Houston, Texas $10.1B AUM 10.46% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Linonia Partnership New York $5.6B AUM 1.81% 1-Year Est. Return

Browning West Los Angeles, California $1.69B AUM 9.16% 1-Year Est. Return

ACM

Abrams Capital Management Boston, Massachusetts $5.48B AUM 3.63% 1-Year Est. Return

Castleark Management's SGI Position: Q2 2026 in Review

Castleark Management reduced its Somnigroup International (SGI) stake by 96% in Q2 2026, selling an estimated $3.42M and leaving 2,090 shares worth $164K. The position accounts for ﹤0.01% of the portfolio, ranked #297.

Castleark Management first reported a position in SGI in Q3 2013 and has held it in 10 quarters since. The position peaked at $10.1M in Q3 2013. 538 funds tracked by Wall St. Rank hold SGI as of Q2 2026.

Castleark Management held 2,090 shares of Somnigroup International worth $164K as of Q2 2026.
Castleark Management sold 46,695 Somnigroup International shares in Q2 2026, an estimated $3.42M.
Somnigroup International made up ﹤0.01% of Castleark Management's portfolio in Q2 2026, its #297 holding.
Castleark Management first reported a position in Somnigroup International in Q3 2013 and has held it in 10 quarters since.
Castleark Management's Somnigroup International position peaked at $10.1M in Q3 2013.
538 funds tracked by Wall St. Rank held Somnigroup International as of Q2 2026.

Based on Castleark Management's 13F filing for Q2 2026, filed 14 Aug 2026.