William Blair Investment Management
GKOS icon

William Blair Investment Management’s Glaukos GKOS Stock Holding History

William Blair Investment 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 		$92.5M Sell
661,675
-412,144
-38% -$52.1M 0.28% 106
2026
Q1 		$116M Sell
1,073,819
-33,099
-3% -$3.72M 0.38% 72
2025
Q4 		$125M Buy
1,106,918
+13,174
+1% +$1.26M 0.35% 77
2025
Q3 		$89.2M Sell
1,093,744
-42,351
-4% -$3.89M 0.23% 114
2025
Q2 		$117M Buy
1,136,095
+390,805
+52% +$36.7M 0.31% 87
2025
Q1 		$73.4M Sell
745,290
-64,299
-8% -$8.58M 0.21% 121
2024
Q4 		$121M Buy
+809,589
New +$112M 0.3% 101
2020
Q1 		– Sell
-1,976,525
Closed -$108M – 358
2019
Q4 		$108M Sell
1,976,525
-416,534
-17% -$25.3M 0.43% 79
2019
Q3 		$150M Sell
2,393,059
-19,963
-0.8% -$1.41M 0.64% 51
2019
Q2 		$182M Sell
2,413,022
-52,410
-2% -$3.76M 0.76% 40
2019
Q1 		$193M Buy
2,465,432
+9,401
+0.4% +$628K 0.81% 34
2018
Q4 		$138M Buy
2,456,031
+13,089
+0.5% +$787K 0.69% 42
2018
Q3 		$159M Sell
2,442,942
-248,266
-9% -$12.2M 0.55% 57
2018
Q2 		$109M Sell
2,691,208
-77,837
-3% -$2.77M 0.41% 78
2018
Q1 		$85.4M Buy
2,769,045
+789,085
+40% +$23.9M 0.33% 97
2017
Q4 		$50.8M Buy
1,979,960
+137,969
+7% +$4.11M 0.2% 142
2017
Q3 		$60.8M Sell
1,841,991
-322,773
-15% -$12.3M 0.22% 131
2017
Q2 		$89.8M Buy
2,164,764
+100,320
+5% +$4.32M 0.33% 101
2017
Q1 		$106M Buy
2,064,444
+104,670
+5% +$4.56M 0.4% 80
2016
Q4 		$67.2M Buy
1,959,774
+883,914
+82% +$30.3M 0.27% 121
2016
Q3 		$40.6M Buy
1,075,860
+937,703
+679% +$31M 0.15% 165
2016
Q2 		$4.03M Buy
+138,157
New +$3.2M 0.02% 369

Other funds holding GKOS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Holocene Advisors
Holocene Advisors New York $44.4B AUM 57.89% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return

William Blair Investment Management's GKOS Position: Q2 2026 in Review

William Blair Investment Management reduced its Glaukos (GKOS) stake by 38% in Q2 2026, selling an estimated $52.1M and leaving 661,675 shares worth $92.5M. The position accounts for 0.28% of the portfolio, ranked #106.

William Blair Investment Management first reported a position in GKOS in Q2 2016 and has held it in 22 quarters since. The position peaked at $193M in Q1 2019. 366 funds tracked by Wall St. Rank hold GKOS as of Q2 2026.

  • William Blair Investment Management held 661,675 shares of Glaukos worth $92.5M as of Q2 2026.
  • William Blair Investment Management sold 412,144 Glaukos shares in Q2 2026, an estimated $52.1M.
  • Glaukos made up 0.28% of William Blair Investment Management's portfolio in Q2 2026, its #106 holding.
  • William Blair Investment Management first reported a position in Glaukos in Q2 2016 and has held it in 22 quarters since.
  • William Blair Investment Management's Glaukos position peaked at $193M in Q1 2019.
  • 366 funds tracked by Wall St. Rank held Glaukos as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.