Glaukos
GKOS
336 hedge funds and large institutions have $6.25B invested in Glaukos in 2026 Q1 according to their latest regulatory filings, with 50 funds opening new positions, 110 increasing their positions, 127 reducing their positions, and 41 closing their positions.
22% more first-time investments, than exits
New positions opened: 50 | Existing positions closed: 41
1% more funds holding
Funds holding: 332 → 336 (+4)
0.47% more ownership
Funds ownership: 99.37% → 99.84% (+0.47%)
3% less capital invested
Capital invested by funds: $6.44B → $6.25B (-$193M)
13% less repeat investments, than reductions
Existing positions increased: 110 | Existing positions reduced: 127
25% less funds holding in top 10
Funds holding in top 10: 4 → 3 (-1)
79% less call options, than puts
Call options by funds: $18.4M | Put options by funds: $85.9M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Janus Henderson Group
London,
|
+$262M |
| 2 |
Citadel Advisors
Miami,
Florida
|
+$160M |
| 3 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
+$54.9M |
| 4 |
Jennison Associates
New York
|
+$54.8M |
| 5 |
Westfield Capital Management
Boston,
Massachusetts
|
+$54.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Ameriprise
Minneapolis,
Minnesota
|
-$55.5M |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$54.9M |
| 3 |
Millennium Management
New York
|
-$49.1M |
| 4 |
Wellington Management Group
Boston,
Massachusetts
|
-$38M |
| 5 |
A
AustralianSuper
Melbourne,
Australia
|
-$35.8M |
GKOS Hedge Fund Activity: Q1 2026 in Review
336 of the 8,191 institutional investors tracked by Wall St. Rank reported a position in Glaukos (GKOS) for Q1 2026, worth a combined $6.25B — down 3% from $6.44B a quarter earlier.
Buyers outnumbered sellers: 50 funds opened new GKOS positions and 41 closed out — a net gain of 9 holders — while 110 added to existing stakes and 127 trimmed.
The largest buyer was Janus Henderson Group, adding an estimated $262M. The largest seller was Ameriprise, cutting an estimated $55.5M.
- 336 institutional investors held Glaukos (GKOS) as of Q1 2026, up from 332 in Q4 2025.
- Funds reported $6.25B of Glaukos stock for Q1 2026, down 3% quarter-over-quarter.
- 50 funds opened new Glaukos positions in Q1 2026 and 41 closed out, a net change of +9 holders.
- The largest Glaukos buyer in Q1 2026 was Janus Henderson Group, an estimated $262M added.
- The largest Glaukos seller in Q1 2026 was Ameriprise, an estimated $55.5M sold.
Based on aggregated 13F filings for Q1 2026.