Glaukos Corporation (GKOS) Insider Trading

Over the last 3 months, GKOS insiders made 0 open-market buys and 10 sales, a net sale of -$19.9M (SEC Form 4). Over the last 6 months, 258 institutions increased and 238 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
10
Net (3m)
-$19.9M
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Jul
Aug
Context3-month price +74.3%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
Aug 20, 2026Kliman Gilbert HdirectorOption2,500$25.77
Aug 20, 2026Kliman Gilbert HdirectorSell2,500$190.00
Aug 13, 2026Gilliam Joseph Eofficer: PRESIDENT & COOOption20,000$55.18
Aug 13, 2026Gilliam Joseph Eofficer: PRESIDENT & COOSell27,963$178.89
Aug 13, 2026Gilliam Joseph Eofficer: PRESIDENT & COOOption10,000$48.46
Aug 13, 2026Gilliam Joseph Eofficer: PRESIDENT & COOSell32,037$180.49
Aug 11, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICERSell20,000$180.13
Aug 11, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICEROption20,000$33.81
Aug 3, 2026WEN LEANAdirectorSell525$167.63
Jul 21, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICEROption10,000$38.68
Jul 21, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICERSell10,000$160.00
Jul 13, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICERSell10,000$155.00
Jul 13, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICEROption10,000$38.68
Jul 8, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICERSell10,000$150.00
Jul 8, 2026Thurman Alex R.officer: SVP & CHIEF FINANCIAL OFFICEROption10,000$38.68
Jul 8, 2026Navratil Tomasofficer: CHIEF DEVELOPMENT OFFICERSell716$139.06
Jun 29, 2026Gilliam Joseph Eofficer: PRESIDENT & COOTax1,056$142.57
Jun 29, 2026Burns Thomas Williamdirector, officer: CHAIRMAN & CEOTax4,059$142.57
Jun 29, 2026Navratil Tomasofficer: CHIEF DEVELOPMENT OFFICERTax483$142.57
Jun 23, 2026Kliman Gilbert HdirectorGrant2,987$106.52
Jun 23, 2026Foley Mark JdirectorGrant2,987$106.52
Jun 23, 2026Hoffmeister David FdirectorGrant2,987$106.52
Jun 23, 2026WEN LEANAdirectorGrant2,987$106.52
Jun 23, 2026Stapley MarcdirectorGrant2,987$106.52
Jun 23, 2026WEISNER AIMEE SdirectorGrant2,987$106.52
Jun 23, 2026Torres DenicedirectorGrant2,987$106.52
Jun 18, 2026Navratil Tomasofficer: CHIEF DEVELOPMENT OFFICERSell1,537$130.68
Jun 1, 2026Hoffmeister David FdirectorGrant2,987$53.57
Jun 1, 2026Foley Mark JdirectorGrant2,987$53.57
Jun 1, 2026WEN LEANAdirectorGrant1,878

Source: GKOS SEC Form 4 filings, latest Aug 20, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their GKOS positions over the last 6 months (SEC Form 13F).

Increased
258
New positions
122
Reduced
238
Sold out
42
Largest moves
InstitutionActionSharesFiled
BlackRock, Inc.Increased9.5MAug 7, 2026
BLACKROCK, INC.Reduced9.1MMay 13, 2026
JANUS HENDERSON GROUP PLCIncreased5.3MMay 18, 2026
Jupiter Topco LLCNew Position4.9MAug 14, 2026
PRIMECAP MANAGEMENT CO/CA/Reduced3.4MMay 11, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCIncreased3.3MAug 13, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position3.2MMay 8, 2026
PRIMECAP MANAGEMENT CO/CA/Reduced3.0MAug 14, 2026
VANGUARD CAPITAL MANAGEMENT LLCIncreased2.6MAug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position2.5MMay 15, 2026
STATE STREET CORPIncreased2.3MAug 7, 2026
STATE STREET CORPIncreased2.2MMay 15, 2026
MILLENNIUM MANAGEMENT LLCIncreased1.6MAug 14, 2026
AMERIPRISE FINANCIAL INCReduced1.6MJul 17, 2026
Holocene Advisors, LPIncreased1.5MAug 14, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.