Save your place

Sign in to WhoBought

Please try again later.

Ken Griffin's Glaukos Corporation (GKOS) position

Yes: as of Q1 2026, Ken Griffin holds 1.4M shares of GKOS worth $156M (0.1% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
View full portfolio →
Current value
$156M
Shares held
1.4M
% of portfolio
0.1%
Est. average buy price (i)
$112.81
est. since Q1 2021
Quarter-end price
$107.66

Estimated trade prices

Average price in quarters with purchases
$101.37
Average prices in quarters with sales
  • Q4 2025: $95.54 (29K shares sold)
  • Q3 2025: $91.83 (265K shares sold)
  • Q2 2025: $93.83 (100K shares sold)
  • Q1 2025: $133.38 (772K shares sold)
  • Q3 2024: $124.44 (169K shares sold)
  • Q1 2024: $89.35 (83K shares sold)
  • Q4 2023: $68.19 (247K shares sold)
  • Q3 2023: $74.68 (69K shares sold)
  • Q2 2023: $57.40 (324K shares sold)
  • Q2 2022: $47.46 (47K shares sold)
  • Q1 2022: $52.91 (11K shares sold)
  • Q4 2021: $46.16 (227K shares sold)
  • Q2 2021: $82.12 (145K shares sold)

GKOS price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$30$100$150$20020222023202420252026Added 239K shares (434.8%) · Q3 2021. Average closing price $55.46 · Price range $47.43–$84.23239KsharespurchasedSold 227K shares (77.4%) · Q4 2021. Average closing price $46.16 · Price range $40.27–$56.99227KsharessoldSold 11K shares (17.1%) · Q1 2022. Average closing price $52.91 · Price range $44.33–$57.8211KsharessoldSold 47K shares (86.0%) · Q2 2022. Average closing price $47.46 · Price range $34.86–$63.7747KsharessoldAdded 660K shares (over 1,000%) · Q3 2022. Average closing price $51.61 · Price range $46.84–$58.49660KsharespurchasedAdded 33K shares (4.9%) · Q4 2022. Average closing price $49.32 · Price range $40.82–$57.7533KsharespurchasedAdded 57K shares (8.1%) · Q1 2023. Average closing price $48.59 · Price range $43.88–$52.4857KsharespurchasedSold 324K shares (42.7%) · Q2 2023. Average closing price $57.40 · Price range $45.44–$71.21324KsharessoldSold 69K shares (15.8%) · Q3 2023. Average closing price $74.68 · Price range $69.23–$79.0969KsharessoldSold 247K shares (67.5%) · Q4 2023. Average closing price $68.19 · Price range $59.53–$85.11247KsharessoldSold 83K shares (69.8%) · Q1 2024. Average closing price $89.35 · Price range $76.40–$96.3383KsharessoldAdded 493K shares (over 1,000%) · Q2 2024. Average closing price $106.17 · Price range $89.48–$118.35493KsharespurchasedSold 169K shares (32.0%) · Q3 2024. Average closing price $124.44 · Price range $113.62–$135.39169KsharessoldAdded 833K shares (231.8%) · Q4 2024. Average closing price $137.76 · Price range $126.42–$152.67833KsharespurchasedSold 772K shares (64.7%) · Q1 2025. Average closing price $133.38 · Price range $96.60–$161.22772KsharessoldSold 100K shares (23.8%) · Q2 2025. Average closing price $93.83 · Price range $82.27–$103.29100KsharessoldSold 265K shares (82.5%) · Q3 2025. Average closing price $91.83 · Price range $79.92–$106.55265KsharessoldSold 29K shares (51.8%) · Q4 2025. Average closing price $95.54 · Price range $74.67–$117.0929KsharessoldAdded 1.4M shares (over 1,000%) · Q1 2026. Average closing price $112.54 · Price range $97.02–$125.901.4Msharespurchased← Earlier —1 sell
Average closing price · filing quarter
$112.54
Price range · filing quarter
$97.02 – $125.90
Sign in to see who bought

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +1.4M +$160M +5,267.7% 1.4M May 15, 2026
Q4 2025 Reduced −29K −$2.8M −51.8% 27K Feb 17, 2026
Q3 2025 Reduced −265K −$24M −82.5% 56K Nov 14, 2025
Q2 2025 Reduced −100K −$9.4M −23.8% 321K Aug 14, 2025
Q1 2025 Reduced −772K −$103M −64.7% 420K May 15, 2025
Q4 2024 Added +833K +$115M +231.8% 1.2M Feb 14, 2025
Q3 2024 Reduced −169K −$21M −32.0% 359K Nov 14, 2024
Q2 2024 Added +493K +$52M +1,370.8% 529K Aug 14, 2024
Q1 2024 Reduced −83K −$7.4M −69.8% 36K May 15, 2024
Q4 2023 Reduced −247K −$17M −67.5% 119K Feb 14, 2024
Q3 2023 Reduced −69K −$5.1M −15.8% 366K Nov 14, 2023
Q2 2023 Reduced −324K −$19M −42.7% 434K Aug 14, 2023
Q1 2023 Added +57K +$2.8M +8.1% 758K May 15, 2023
Q4 2022 Added +33K +$1.6M +4.9% 701K Feb 14, 2023
Q3 2022 Added +660K +$34M +8,595.8% 668K Nov 14, 2022
Q2 2022 Reduced −47K −$2.2M −86.0% 8K Aug 15, 2022
Q1 2022 Reduced −11K −$599K −17.1% 55K May 16, 2022
Q4 2021 Reduced −227K −$10M −77.4% 66K Feb 14, 2022
Q3 2021 Added +239K +$13M +434.8% 293K Nov 15, 2021
Q2 2021 Reduced −145K −$12M −72.5% 55K Aug 16, 2021
Q1 2021 First covered – – – 200K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
21 grouped rows from 21 quarters

More Griffin positions

NVIDIA Corporation(NVDA)
$3.2B
2.3% of portfolio

Amazon.com, Inc.(AMZN)
$1.7B
1.2% of portfolio

Micron Technology, Inc.(MU)
$1.6B
1.1% of portfolio

Taiwan Semiconductor Manufacturing Company Limited(TSM)
$1.4B
1.0% of portfolio

Apple Inc.(AAPL)
$1.3B
0.9% of portfolio

Meta Platforms, Inc.(META)
$1.0B
0.7% of portfolio

Common questions

Does Ken Griffin own GKOS?

Yes. As of Q1 2026, Ken Griffin disclosed 1.4M shares of GKOS, worth $156M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy GKOS?

Ken Griffin held GKOS since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell GKOS?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in GKOS. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of GKOS does Ken Griffin own?

Ken Griffin disclosed 1.4M shares of GKOS as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for GKOS?

Ken Griffin began building the GKOS position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.