How many shares of GKOS does PRIMECAP MANAGEMENT CO/CA/ own?

As of 2026-Q2, PRIMECAP MANAGEMENT CO/CA/ holds 3M shares of GKOS (GLAUKOS CORP).

What is PRIMECAP MANAGEMENT CO/CA/'s GKOS position worth?

As of 2026-Q2, PRIMECAP MANAGEMENT CO/CA/'s GKOS position is worth $425M.

Is PRIMECAP MANAGEMENT CO/CA/ buying or selling GKOS?

In 2026-Q2, PRIMECAP MANAGEMENT CO/CA/ decreased their GKOS position (-9.8% change in shares).

When did PRIMECAP MANAGEMENT CO/CA/ first buy GKOS?

Based on available 13F filings, PRIMECAP MANAGEMENT CO/CA/ first reported a position in GKOS in 2018-Q4. They have held the position across 31 quarters.

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PRIMECAP MANAGEMENT CO/CA/

GKOS
31 quarters

Position history for PRIMECAP MANAGEMENT CO/CA/'s holdings in GLAUKOS CORP

Current Value

$425M

Current Shares

Total Value Change

+$409.9M

Total Shares Change

+2.8M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	3M	-9.8%	$425M	0.3%	$139.76	0
2026-Q1	Decreased	3.4M	-0.2%	$362.9M	0.3%	$117.75	0
2025-Q4	Increased	3.4M	+49.8%	$381.3M	0.3%	$114.24	51
2025-Q3	Increased	2.3M	+23.3%	$183.8M	0.1%	$81.28	44
2025-Q2	Increased	1.8M	+50.0%	$188.8M	0.1%	$101.42	50
2025-Q1	Increased	1.2M	+0.3%	$119.9M	0.1%	$102.00	30
2024-Q4	Decreased	1.2M	-2.5%	$182.1M	0.1%	$149.51	0
2024-Q3	Increased	1.2M	+2.0%	$162.2M	0.1%	$128.29	37
2024-Q2	Increased	1.2M	+43.9%	$144.5M	0.1%	$118.35	49
2024-Q1	Increased	848,635	+7.4%	$80M	0.1%	$94.29	32
2023-Q4	Increased	790,035	+23.7%	$62.8M	0.0%	$79.49	36
2023-Q3	Increased	638,620	+3.3%	$48.1M	0.0%	$75.25	30
2023-Q2	Increased	618,500	+1.7%	$44M	0.0%	$70.81	30
2023-Q1	Increased	608,200	+10.5%	$30.5M	0.0%	$49.25	32
2022-Q4	Increased	550,480	+2.3%	$24M	0.0%	$43.68	29
2022-Q3	Decreased	537,890	-0.6%	$28.6M	0.0%	$53.53	0
2022-Q2	Increased	541,370	+1.7%	$24.6M	0.0%	$45.75	29
2022-Q1	Decreased	532,500	-0.1%	$30.8M	0.0%	$57.31	0
2021-Q4	Increased	532,900	+6.5%	$23.7M	0.0%	$45.84	30
2021-Q3	Increased	500,200	+12.5%	$24.1M	0.0%	$48.79	32
2021-Q2	Increased	444,500	+1.9%	$37.7M	0.0%	$82.08	30
2021-Q1	Increased	436,300	+1.2%	$36.6M	0.0%	$84.48	29
2020-Q4	Increased	431,200	+5.8%	$32.5M	0.0%	$74.79	31
2020-Q3	Increased	407,700	+1.5%	$20.2M	0.0%	$50.97	29
2020-Q2	Increased	401,630	+18.2%	$15.4M	0.0%	$38.18	33
2020-Q1	Increased	339,700	+6.8%	$10.5M	0.0%	$33.36	30
2019-Q4	Increased	318,200	+12.7%	$17.3M	0.0%	$54.18	32
2019-Q3	Increased	282,300	+3.5%	$17.6M	0.0%	$61.17	29
2019-Q2	Unchanged	272,700	0.0%	$20.6M	0.0%	$75.40	0
2019-Q1	Increased	272,700	+1.5%	$21.4M	0.0%	$78.37	29
2018-Q4	New	268,700	-	$15.1M	0.0%	$55.80	39

Other major holders of GKOS: BNP PARIBAS FINANCIAL MARKETS, BlackRock, Inc.

GKOS31 quarters

GKOS
31 quarters