Glaukos Corporation
DE ˙ DB ˙ US3773221029
102,00 € ↑5,50 (5,70%)
2026-06-05
DEL PRIS
SecurityDE:6GJ / Glaukos Corporation
InstitutionPrimecap Management Co/ca/
Latest Disclosed Ownership3,376,928 shares
Ownership 5.88%
Primecap Management Co/ca/ ownership in 6GJ / Glaukos Corporation

2026-02-11 - Primecap Management Co/ca/ has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 3,376,928 shares of Glaukos Corporation (DE:6GJ). This represents 5.88 percent ownership of the company.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-02-11 2026-02-11 13G 3,376,928 5.88

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F GLAUKOS COM 377322102 3,370,628 -6,300 -0.19 362,882 -4.83 0.2857
2026-02-11 2025-12-31 13F GLAUKOS COM 377322102 3,376,928 1,123,140 49.83 381,289 107.45 0.2886
2025-11-12 2025-09-30 13F GLAUKOS COM 377322102 2,253,788 425,790 23.29 183,796 -2.66 0.1408
2025-08-11 2025-06-30 13F GLAUKOS COM 377322102 1,827,998 609,523 50.02 188,814 57.45 0.1496
2025-05-09 2025-03-31 13F GLAUKOS COM 377322102 1,218,475 4,150 0.34 119,922 -34.14 0.0991
2025-02-10 2024-12-31 13F GLAUKOS COM 377322102 1,214,325 -30,860 -2.48 182,076 12.24 0.1410
2024-11-08 2024-09-30 13F GLAUKOS COM 377322102 1,245,185 24,370 2.00 162,223 12.28 0.1193
2024-08-09 2024-06-30 13F GLAUKOS COM 377322102 1,220,815 372,180 43.86 144,483 80.57 0.1046
2024-05-14 2024-03-31 13F GLAUKOS COM 377322102 848,635 58,600 7.42 80,018 27.42 0.0597
2024-02-09 2023-12-31 13F GLAUKOS COM 377322102 790,035 151,415 23.71 62,800 30.68 0.0497
2023-11-13 2023-09-30 13F GLAUKOS COM 377322102 638,620 20,120 3.25 48,056 9.11 0.0406
2023-08-11 2023-06-30 13F GLAUKOS COM 377322102 618,500 10,300 1.69 44,043 44.55 0.0368
2023-05-15 2023-03-31 13F GLAUKOS COM 377322102 608,200 57,720 10.49 30,471 26.73 0.0266
2023-02-13 2022-12-31 13F GLAUKOS COM 377322102 550,480 12,590 2.34 24,045 -16.04 0.0220
2022-11-14 2022-09-30 13F GLAUKOS COM 377322102 537,890 -3,480 -0.64 28,637 16.46 0.0277
2022-08-11 2022-06-30 13F GLAUKOS COM 377322102 541,370 8,870 1.67 24,589 -20.14 0.0220
2022-05-11 2022-03-31 13F GLAUKOS COM 377322102 532,500 -400 -0.08 30,789 30.01 0.0232
2022-02-11 2021-12-31 13F GLAUKOS COM 377322102 532,900 32,700 6.54 23,682 -1.71 0.0164
2021-11-12 2021-09-30 13F GLAUKOS COM 377322102 500,200 55,700 12.53 24,095 -36.10 0.0170
2021-08-10 2021-06-30 13F GLAUKOS COM 377322102 444,500 8,200 1.88 37,707 2.97 0.0253
2021-05-14 2021-03-31 13F GLAUKOS COM 377322102 436,300 5,100 1.18 36,619 12.84 0.0255
2021-02-08 2020-12-31 13F GLAUKOS COM 377322102 431,200 23,500 5.76 32,452 60.74 0.0241
2020-11-13 2020-09-30 13F GLAUKOS COM 377322102 407,700 6,070 1.51 20,189 30.83 0.0167
2020-08-13 2020-06-30 13F GLAUKOS COM 377322102 401,630 61,930 18.23 15,431 47.20 0.0132
2020-05-14 2020-03-31 13F GLAUKOS COM 377322102 339,700 21,500 6.76 10,483 -39.52 0.0103
2020-02-14 2019-12-31 13F GLAUKOS COM 377322102 318,200 35,900 12.72 17,332 -1.79 0.0126
2019-11-13 2019-09-30 13F GLAUKOS COM 377322102 282,300 9,600 3.52 17,647 -14.18 0.0141
2019-08-14 2019-06-30 13F GLAUKOS COM 377322102 272,700 0 0.00 20,562 -3.79 0.0152
2019-05-14 2019-03-31 13F GLAUKOS COM 377322102 272,700 4,000 1.49 21,371 41.60 0.0157
2019-02-12 2018-12-31 13F GLAUKOS COM 377322102 268,700 -300 -0.11 15,093 -13.55 0.0122
2018-11-13 2018-09-30 13F GLAUKOS COM 377322102 269,000 54,500 25.41 17,458 100.28 0.0118
2018-08-13 2018-06-30 13F GLAUKOS COM 377322102 214,500 32,500 17.86 8,717 55.36 0.0065
2018-05-14 2018-03-31 13F GLAUKOS COM 377322102 182,000 99,790 121.38 5,611 166.05 0.0042
2018-02-13 2017-12-31 13F GLAUKOS COM 377322102 82,210 82,210 2,109 0.0016
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.