UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 7, 2019

Glaukos Corporation

(Exact name of registrant as specified in its charter)

Delaware |  | 001-37463 |  | 33-0945406
(State or other jurisdiction |  | (Commission |  | (I.R.S. Employer
of incorporation) |  | File Number) |  | Identification No.)

229 Avenida Fabricante San Clemente, California |  | 92672
(Address of principal executive offices) |  | (Zip Code)

Registrant’s telephone number, including area code: (949) 367-9600

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☒Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Securities registered pursuant to Section 12(b) of the Act:

Title of each class: |  | Trading Symbol |  | Name of each exchange on which registered:
Common Stock |  | GKOS |  | New York Stock Exchange

Item 8.01. Other Events.

Glaukos Corporation (the “Company”) intends to present the materials attached as Exhibit 99.1 to this Current Report on Form 8-K (the “Investor Presentation”) from time to time in presentations to investors and other stakeholders. The Investor Presentation will also be available on the investor page of the Company’s website at http://investors.glaukos.com.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No. |  | Description
99.1 |  | Investor Presentation, dated August 7, 2019

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| GLAUKOS CORPORATION (Registrant)
| By: | /s/ Joseph E. Gilliam
|  | Name: | Joseph E. Gilliam
|  | Title: | Chief Financial Officer and Senior Vice President, Corporate Development

Date: August 7, 2019