Mario Gabelli Glaukos Corp Transaction History

Gamco Investors, Inc. Et Al

$9.45 Billion
Q3 2025

A detailed history of Mario Gabelli (Gamco Investors, Inc. Et Al) transactions in Glaukos Corp stock. As of the latest transaction made, Gamco Investors, Inc. Et Al holds 8,100 shares of GKOS stock, worth $729,243. This represents 0.01% of its overall portfolio holdings.

Number of Shares

8,100

Previous 8,001 1.24%

Holding current value

$729,243

Previous $826,000 20.1%

% of portfolio

0.01%

Previous 0.01%

25 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 12, 2025	BUY	$79.92 - $106.55 $7,912 - $10,548	99 Added 1.24%	8,100 $660,000
Q2 2025 Aug 13, 2025	BUY	$82.27 - $103.29 $63,594 - $79,843	773 Added 10.69%	8,001 $826,000
Q1 2025 May 14, 2025	BUY	$96.6 - $161.22 $195,035 - $325,503	2,019 Added 38.76%	7,228 $711,000
Q4 2024 Feb 13, 2025	SELL	$126.42 - $152.67 $7,711 - $9,312	-61 Reduced 1.16%	5,209 $781,000
Q3 2024 Nov 14, 2024	SELL	$113.62 - $135.39 $26,927 - $32,087	-237 Reduced 4.3%	5,270 $686,000
Q2 2024 Aug 13, 2024	SELL	$89.48 - $118.35 $222,178 - $293,863	-2,483 Reduced 31.08%	5,507 $651,000
Q1 2024 May 14, 2024	SELL	$76.4 - $96.33 $27,886 - $35,160	-365 Reduced 4.37%	7,990 $753,000
Q3 2023 Nov 08, 2023	SELL	$69.23 - $79.09 $52,891 - $60,424	-764 Reduced 8.38%	8,355 $628,000
Q2 2023 Aug 10, 2023	BUY	$45.44 - $71.21 $18,675 - $29,267	411 Added 4.72%	9,119 $649,000
Q1 2023 May 12, 2023	BUY	$43.88 - $52.48 $78,896 - $94,359	1,798 Added 26.02%	8,708 $436,000
Q4 2022 Feb 13, 2023	SELL	$40.82 - $57.75 $11,103 - $15,708	-272 Reduced 3.79%	6,910 $301,000
Q3 2022 Nov 10, 2022	BUY	$46.84 - $58.49 $50,680 - $63,286	1,082 Added 17.74%	7,182 $382,000
Q2 2022 Aug 12, 2022	SELL	$34.86 - $63.77 $35,382 - $64,726	-1,015 Reduced 14.27%	6,100 $277,000
Q1 2022 May 18, 2022	SELL	$44.33 - $57.82 $1,462 - $1,908	-33 Reduced 0.46%	7,115 $411,000
Q1 2022 May 13, 2022	BUY	$44.33 - $57.82 $37,059 - $48,337	836 Added 13.24%	7,148 $413,000
Q4 2021 Feb 11, 2022	BUY	$40.27 - $56.99 $57,143 - $80,868	1,419 Added 29.0%	6,312 $281,000
Q3 2021 Nov 12, 2021	SELL	$47.43 - $84.23 $8,774 - $15,582	-185 Reduced 3.64%	4,893 $236,000
Q2 2021 Aug 13, 2021	SELL	$73.06 - $97.7 $4,821 - $6,448	-66 Reduced 1.28%	5,078 $431,000
Q1 2021 May 14, 2021	BUY	$70.43 - $97.42 $13,311 - $18,412	189 Added 3.81%	5,144 $432,000
Q4 2020 Feb 05, 2021	SELL	$48.9 - $75.26 $137,360 - $211,405	-2,809 Reduced 36.18%	4,955 $373,000
Q3 2020 Nov 06, 2020	SELL	$37.23 - $50.97 $14,110 - $19,317	-379 Reduced 4.65%	7,764 $384,000
Q2 2020 Aug 13, 2020	BUY	$28.78 - $46.83 $57 - $93	2 Added 0.02%	8,143 $313,000
Q1 2020 May 14, 2020	BUY	$25.53 - $70.14 $86,112 - $236,582	3,373 Added 70.74%	8,141 $251,000
Q4 2019 Feb 14, 2020	BUY	$54.18 - $65.64 $61,981 - $75,092	1,144 Added 31.57%	4,768 $260,000
Q3 2019 Nov 01, 2019	BUY	$58.58 - $83.91 $212,293 - $304,089	3,624 New	3,624 $227,000

Others Institutions Holding GKOS

# of Institutions

348

Shares Held

55.3M

Call Options Held

163K

Put Options Held

458K

View Full List

About GLAUKOS Corp

Ticker GKOS
Exchange NYSE
Sector Healthcare
Industry Medical Devices
Shares Outstandng 47,596,900
Market Cap $4.29B
Description
Glaukos Corporation, an ophthalmic medical technology and pharmaceutical company, focuses on the development of novel therapies for the treatment of glaucoma, corneal disorders, and retinal diseases. It offers iStent, iStent inject, iStent inject W micro-bypass stents that enhance aqueous humor outflow inserted in cataract surgery to treat mild-...

More about GKOS

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