Mario Gabelli's GKOS Position Overview
Mario Gabelli (via Gamco Investors, Inc. Et Al) currently holds 3,701 shares of Glaukos Corporation (GKOS) worth $417,880, representing 0.00% of the portfolio. First purchased in 2019-Q3, this long-term strategic position has been held for 26 quarters.
Based on 13F filings, Mario Gabelli has maintained a strategic position in GKOS, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2020, adding 3,373 shares. Largest reduction occurred in Q4 2025, reducing 4,399 shares.
Analysis based on 13F filings available since 2013 Q2
Mario Gabelli's Glaukos Corporation (GKOS) Holding Value Over Time
Track share changes against reported price movement
Quarterly Glaukos Corporation (GKOS) Trades by Mario Gabelli
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -4,399 | Reduce 54.31% | 3,701 | $112.91 |
| Q3 2025 | +99 | Add 1.24% | 8,100 | $81.55 |
| Q2 2025 | +773 | Add 10.69% | 8,001 | $103.29 |
| Q1 2025 | +2,019 | Add 38.76% | 7,228 | $98.42 |
| Q4 2024 | -61 | Reduce 1.16% | 5,209 | $149.94 |
| Q3 2024 | -237 | Reduce 4.30% | 5,270 | $130.28 |
| Q2 2024 | -2,483 | Reduce 31.08% | 5,507 | $118.35 |
| Q1 2024 | -141 | Reduce 1.73% | 7,990 | $94.29 |
| Q4 2023 | -224 | Reduce 2.68% | 8,131 | $79.49 |
| Q3 2023 | -764 | Reduce 8.38% | 8,355 | $75.25 |
| Q2 2023 | +411 | Add 4.72% | 9,119 | $71.21 |
| Q1 2023 | +1,798 | Add 26.02% | 8,708 | $50.10 |
| Q4 2022 | -272 | Reduce 3.79% | 6,910 | $43.68 |
| Q3 2022 | +1,082 | Add 17.74% | 7,182 | $53.19 |
| Q2 2022 | -1,015 | Reduce 14.27% | 6,100 | $45.41 |
| Q1 2022 | +803 | Add 12.72% | 7,115 | $57.77 |
| Q4 2021 | +1,419 | Add 29.00% | 6,312 | $44.52 |
| Q3 2021 | -185 | Reduce 3.64% | 4,893 | $48.23 |
| Q2 2021 | -66 | Reduce 1.28% | 5,078 | $84.88 |
| Q1 2021 | +189 | Add 3.81% | 5,144 | $83.98 |
| Q4 2020 | -2,809 | Reduce 36.18% | 4,955 | $75.28 |
| Q3 2020 | -379 | Reduce 4.65% | 7,764 | $49.46 |
| Q2 2020 | +2 | Add 0.02% | 8,143 | $38.44 |
| Q1 2020 | +3,373 | Add 70.74% | 8,141 | $30.83 |
| Q4 2019 | +1,144 | Add 31.57% | 4,768 | $54.53 |
| Q3 2019 | +3,624 | New Buy | 3,624 | $62.64 |
Mario Gabelli's Glaukos Corporation Investment FAQs
Mario Gabelli first purchased Glaukos Corporation (GKOS) in Q3 2019, acquiring 3,624 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mario Gabelli has held Glaukos Corporation (GKOS) for 26 quarters since Q3 2019.
Mario Gabelli's largest addition to Glaukos Corporation (GKOS) was in Q3 2019, adding 3,624 shares worth $227,000.
According to the latest 13F filing for Q4 2025, Mario Gabelli's firm, Gamco Investors, Inc. Et Al, owns 3,701 shares of Glaukos Corporation (GKOS), valued at approximately $417,880.
As of the Q4 2025 filing, Glaukos Corporation (GKOS) represents approximately 0.00% of Mario Gabelli's publicly disclosed stock portfolio, making it one of their key holdings.
Mario Gabelli's peak holding in Glaukos Corporation (GKOS) was 9,119 shares, as reported at the end of Q2 2023.