Glaukos Corporation
DE ˙ DB ˙ US3773221029
102,00 € ↑5,50 (5,70%)
2026-06-05
DEL PRIS
SecurityDE:6GJ / Glaukos Corporation
InstitutionFred Alger Management, Llc
Latest Disclosed Ownership113,943 shares
Latest Disclosed Value $ 12,267,104
Fred Alger Management, Llc reports 65.00% decrease in ownership of 6GJ / Glaukos Corporation

On May 15, 2026 - Fred Alger Management, Llc filed a 13F-HR form disclosing ownership of 113,943 shares of Glaukos Corporation (DE:6GJ) valued at $10,368,813 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 325,540 shares of Glaukos Corporation. This represents a change in shares of -65.00% during the quarter. The current value of the position is $11,622,186 USD.

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)
2026-05-15 2026-03-31 13F Glaukos Equity 377322102 113,943 -211,597 -65.00 12,267 -66.63 0.0343
2026-02-17 2025-12-31 13F Glaukos Equity 377322102 325,540 8,736 2.76 36,757 42.27 0.1442
2025-11-14 2025-09-30 13F Glaukos Equity 377322102 316,804 -109,170 -25.63 25,835 -41.28 0.1006
2025-08-14 2025-06-30 13F Glaukos Equity 377322102 425,974 -179,716 -29.67 43,999 -26.19 0.1969
2025-05-16 2025-03-31 13F Glaukos Equity 377322102 605,690 -159,268 -20.82 59,612 -48.03 0.3395
2025-02-14 2024-12-31 13F Glaukos Equity 377322102 764,958 -312,016 -28.97 114,698 -18.25 0.5465
2024-11-14 2024-09-30 13F GLAUKOS Common 377322102 1,076,974 -201,749 -15.78 140,308 -7.29 0.6801
2024-08-14 2024-06-30 13F GLAUKOS Common 377322102 1,278,723 47,308 3.84 151,337 30.34 0.7357
2024-05-15 2024-03-31 13F GLAUKOS Common 377322102 1,231,415 -413,666 -25.15 116,110 -11.21 0.5758
2024-02-14 2023-12-31 13F GLAUKOS Common 377322102 1,645,081 -135,609 -7.62 130,767 -2.41 0.7055
2023-11-14 2023-09-30 13F GLAUKOS Common 377322102 1,780,690 150,102 9.21 133,997 15.40 0.7104
2023-11-14 2023-09-30 13F GLAUKOS Common 377322102 1,780,690 150,102 133,997 0.7104
2023-08-14 2023-06-30 13F GLAUKOS Common 377322102 1,630,588 109,801 7.22 116,114 52.40 0.5931
2023-05-16 2023-03-31 13F/A-1 GLAUKOS Common 377322102 1,520,787 194,028 14.62 76,191 31.47 0.4075
2023-05-15 2023-03-31 13F GLAUKOS Common 377322102 1,520,787 194,028 76,191 0.3778
2023-02-14 2022-12-31 13F GLAUKOS Common 377322102 1,326,759 -75,351 -5.37 57,953 -22.37 0.3141
2022-11-15 2022-09-30 13F GLAUKOS Common 377322102 1,402,110 358,360 34.33 74,648 57.46 0.3782
2022-08-15 2022-06-30 13F GLAUKOS Common 377322102 1,043,750 39,959 3.98 47,407 -18.32 0.2214
2022-05-16 2022-03-31 13F GLAUKOS Common 377322102 1,003,791 38,088 3.94 58,039 35.24 0.1854
2022-02-14 2021-12-31 13F GLAUKOS Common 377322102 965,703 348,954 56.58 42,916 44.45 0.1075
2021-11-15 2021-09-30 13F GLAUKOS Common 377322102 616,749 -91,938 -12.97 29,709 -50.58 0.0708
2021-08-16 2021-06-30 13F GLAUKOS Common 377322102 708,687 8,758 1.25 60,118 2.34 0.1419
2021-05-17 2021-03-31 13F GLAUKOS Common 377322102 699,929 251,678 56.15 58,745 74.14 0.1537
2021-02-16 2020-12-31 13F GLAUKOS Common 377322102 448,251 -340,536 -43.17 33,735 -13.64 0.0878
2020-11-13 2020-09-30 13F GLAUKOS Common 377322102 788,787 -399,651 -33.63 39,061 -14.45 0.1134
2020-08-14 2020-06-30 13F GLAUKOS Common 377322102 1,188,438 -1,671,734 -58.45 45,660 -48.27 0.1504
2020-05-19 2020-03-31 13F/A-1 GLAUKOS Common 377322102 2,860,172 624,749 27.95 88,265 -27.51 0.3879
2020-05-15 2020-03-31 13F GLAUKOS Common 377322102 2,860,172 624,749 88,265 388,344.3972
2020-02-14 2019-12-31 13F GLAUKOS Common 377322102 2,235,423 133,232 6.34 121,763 -7.34 0.4481
2019-11-14 2019-09-30 13F GLAUKOS Common 377322102 2,102,191 1,134,638 117.27 131,408 80.13 0.5156
2019-08-14 2019-06-30 13F GLAUKOS Common 377322102 967,553 248,679 34.59 72,953 29.49 0.2802
2019-05-14 2019-03-31 13F GLAUKOS Common 377322102 718,874 606,227 538.17 56,338 790.44 0.2244
2019-02-14 2018-12-31 13F GLAUKOS Common 377322102 112,647 -57,158 -33.66 6,327 -42.59 0.0291
2018-11-14 2018-09-30 13F GLAUKOS Common 377322102 169,805 98,225 137.22 11,020 278.82 0.0414
2018-07-19 2018-06-30 13F GLAUKOS Common 377322102 71,580 71,580 2,909 0.0122
2017-11-14 2017-09-30 13F GLAUKOS Common 377322102 0 -21,000 -100.00 0 -100.00
2017-08-14 2017-06-30 13F GLAUKOS Common 377322102 21,000 -7,000 -25.00 871 -39.35 0.0042
2017-05-15 2017-03-31 13F GLAUKOS Common 377322102 28,000 28,000 1,436 0.0071
2016-05-16 2016-03-31 13F GLAUKOS Common 377322102 0 -22,050 -100.00 0 -100.00
2016-02-16 2015-12-31 13F GLAUKOS Common 377322102 22,050 1,000 4.75 544 6.88 0.0026
2015-11-16 2015-09-30 13F GLAUKOS Common 377322102 21,050 -87,185 -80.55 509 -83.77 0.0028
2015-08-14 2015-06-30 13F GLAUKOS Common 377322102 108,235 108,235 3,137 0.0141
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.