GI
GKOS icon

GAMCO Investors’s Glaukos GKOS Stock Holding History

GAMCO Investors’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
Q1 		$351K Sell
3,264
-437
-12% -$49.2K ﹤0.01% 859
2025
Q4 		$418K Sell
3,701
-4,399
-54% -$420K ﹤0.01% 837
2025
Q3 		$661K Buy
8,100
+99
+1% +$9.09K 0.01% 741
2025
Q2 		$826K Buy
8,001
+773
+11% +$72.5K 0.01% 705
2025
Q1 		$711K Buy
7,228
+2,019
+39% +$269K 0.01% 619
2024
Q4 		$781K Sell
5,209
-61
-1% -$8.4K 0.01% 623
2024
Q3 		$687K Sell
5,270
-237
-4% -$29.5K 0.01% 647
2024
Q2 		$652K Sell
5,507
-2,483
-31% -$264K 0.01% 664
2024
Q1 		$753K Sell
7,990
-141
-2% -$12.6K 0.01% 637
2023
Q4 		$646K Sell
8,131
-224
-3% -$15.3K 0.01% 657
2023
Q3 		$629K Sell
8,355
-764
-8% -$57.1K 0.01% 651
2023
Q2 		$649K Buy
9,119
+411
+5% +$23.6K 0.01% 648
2023
Q1 		$436K Buy
8,708
+1,798
+26% +$87.3K ﹤0.01% 705
2022
Q4 		$302K Sell
6,910
-272
-4% -$13.4K ﹤0.01% 768
2022
Q3 		$382K Buy
7,182
+1,082
+18% +$55.8K ﹤0.01% 715
2022
Q2 		$277K Sell
6,100
-1,015
-14% -$48.2K ﹤0.01% 786
2022
Q1 		$411K Buy
7,115
+803
+13% +$42.5K ﹤0.01% 748
2021
Q4 		$281K Buy
6,312
+1,419
+29% +$65.5K ﹤0.01% 826
2021
Q3 		$236K Sell
4,893
-185
-4% -$10.3K ﹤0.01% 861
2021
Q2 		$431K Sell
5,078
-66
-1% -$5.42K ﹤0.01% 779
2021
Q1 		$432K Buy
5,144
+189
+4% +$16.6K ﹤0.01% 779
2020
Q4 		$373K Sell
4,955
-2,809
-36% -$178K ﹤0.01% 771
2020
Q3 		$384K Sell
7,764
-379
-5% -$16.7K ﹤0.01% 722
2020
Q2 		$313K Buy
8,143
+2
+0% +$74 ﹤0.01% 733
2020
Q1 		$251K Buy
8,141
+3,373
+71% +$173K ﹤0.01% 761
2019
Q4 		$260K Buy
4,768
+1,144
+32% +$69.6K ﹤0.01% 825
2019
Q3 		$227K Buy
+3,624
New +$255K ﹤0.01% 840

Other funds holding GKOS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return

GAMCO Investors's GKOS Position: Q1 2026 in Review

GAMCO Investors reduced its Glaukos (GKOS) stake by 12% in Q1 2026, selling an estimated $49.2K and leaving 3,264 shares worth $351K. The position accounts for ﹤0.01% of the portfolio, ranked #859.

GAMCO Investors first reported a position in GKOS in Q3 2019 and has held it in 27 quarters since. The position peaked at $826K in Q2 2025. 336 funds tracked by Wall St. Rank hold GKOS as of Q1 2026.

  • GAMCO Investors held 3,264 shares of Glaukos worth $351K as of Q1 2026.
  • GAMCO Investors sold 437 Glaukos shares in Q1 2026, an estimated $49.2K.
  • Glaukos made up ﹤0.01% of GAMCO Investors's portfolio in Q1 2026, its #859 holding.
  • GAMCO Investors first reported a position in Glaukos in Q3 2019 and has held it in 27 quarters since.
  • GAMCO Investors's Glaukos position peaked at $826K in Q2 2025.
  • 336 funds tracked by Wall St. Rank held Glaukos as of Q1 2026.

Based on GAMCO Investors's 13F filing for Q1 2026, filed 14 May 2026.