Osterweis Capital Management’s Glaukos GKOS Stock Holding History

Osterweis Capital Management’s Portfolio GKOS Stock Details GKOS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$5.67M	Sell	40,539 -54,324	-57%	-$6.87M	0.27%	85
2026 Q1	$10.2M	Sell	94,863 -6,750	-7%	-$760K	0.53%	57
2025 Q4	$11.5M	Sell	101,613 -40,675	-29%	-$3.89M	0.49%	59
2025 Q3	$11.6M	Buy	142,288 +47,915	+51%	+$4.4M	0.52%	52
2025 Q2	$9.75M	Buy	94,373 +35,240	+60%	+$3.31M	0.47%	55
2025 Q1	$5.82M	Buy	+59,133	New	+$7.89M	0.29%	79
2017 Q2	–	Sell	-45,165	Closed	-$2.32M	–	100
2017 Q1	$2.32M	Sell	45,165 -6,020	-12%	-$262K	0.18%	64
2016 Q4	$1.76M	Buy	+51,185	New	+$1.75M	0.13%	64

Other funds holding GKOS

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

Jupiter Topco New York $245B AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

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

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Holocene Advisors New York $44.4B AUM 57.89% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return

Osterweis Capital Management's GKOS Position: Q2 2026 in Review

Osterweis Capital Management reduced its Glaukos (GKOS) stake by 57% in Q2 2026, selling an estimated $6.87M and leaving 40,539 shares worth $5.67M. The position accounts for 0.27% of the portfolio, ranked #85.

Osterweis Capital Management first reported a position in GKOS in Q4 2016 and has held it in 8 quarters since. The position peaked at $11.6M in Q3 2025. 366 funds tracked by Wall St. Rank hold GKOS as of Q2 2026.

Osterweis Capital Management held 40,539 shares of Glaukos worth $5.67M as of Q2 2026.
Osterweis Capital Management sold 54,324 Glaukos shares in Q2 2026, an estimated $6.87M.
Glaukos made up 0.27% of Osterweis Capital Management's portfolio in Q2 2026, its #85 holding.
Osterweis Capital Management first reported a position in Glaukos in Q4 2016 and has held it in 8 quarters since.
Osterweis Capital Management's Glaukos position peaked at $11.6M in Q3 2025.
366 funds tracked by Wall St. Rank held Glaukos as of Q2 2026.

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