Sec Form 4 Filing - SILVERSTEIN JONATHAN @ AVEDRO INC - 2019-11-21

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person SILVERSTEIN JONATHAN 2. Issuer Name and Ticker or Trading Symbol AVEDRO INC [ AVDR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 201 JONES ROAD 3. Date of Earliest Transaction (MM/DD/YY) 11/21/2019 (Street) WALTHAM, MA02451 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 11/21/2019 D 4,240,128 D 0 I See Footnote ( 2 ) ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option (right to buy) $ 12.73 11/21/2019 D 8,314 ( 4 ) 01/08/2029 Common Stock 8,314 ( 4 ) 0 D Restricted Stock Units ( 5 ) 11/21/2019 D 3,005 ( 6 ) ( 6 ) Common Stock 3,005 ( 6 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other SILVERSTEIN JONATHAN 201 JONES ROAD WALTHAM, MA02451 X X Signatures /s/ Paul S. Bavier, Attorney-in-Fact 11/21/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Agreement and Plan of Merger (the "Merger Agreement") dated as of August 7, 2019, by and among Avedro, Inc. (the "Issuer"), Glaukos Corporation ("Parent") and Atlantic Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Merger Sub"), on November 21, 2019, Merger Sub merged with and into the Issuer (the "Merger") with the Issuer continuing as the surviving corporation. Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), each share of common stock of the Issuer ("Issuer Common Stock") that was issued and outstanding immediately prior to the Effective Time was automatically cancelled and converted into the right to receive 0.365 of a share of Parent's common stock ("Parent Common Stock"). The closing price of shares of the Parent Common Stock on November 21, 2019 was $63.07 per share. ( 2 )These securities are held of record by OrbiMed Private Investments VI, LP ("OPI VI"). OrbiMed Capital GP VI LLC ("GP VI") is the sole general partner of OPI VI, and OrbiMed Advisors LLC ("Advisors"), a registered adviser under the Investment Advisers Act of 1940, as amended, is the sole managing member of GP VI. By virtue of such relationships, GP VI and Advisors may be deemed to have voting and investment power with respect to the securities held by OPI VI noted above and as a result may be deemed to have beneficial ownership over such securities. The Reporting Person is a member of Advisors. ( 3 )Each of GP VI, Advisors, and the Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed an admission that any such entity or person is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose. ( 4 )At the Effective Time, each outstanding and unexercised option to purchase Issuer Common Stock (whether vested or unvested) immediately prior to the Effective Time, was assumed by Parent and converted into an option to purchase shares of Parent Common Shares (rounded down to the nearest whole share) using a conversion ratio designed to preserve the intrinsic value of such option of Issuer. ( 5 )Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. ( 6 )At the Effective Time, each outstanding restricted stock unit ("Issuer RSU") (excluding any Issuer RSU that vested prior to or as a result of the consummation of the Merger and which settled in shares of Issuer Common Stock that were converted into the right to receive shares of Parent Common Stock as a result of the Merger) was assumed by Parent and converted into the right to receive shares of Parent Common Stock (rounded down to the nearest whole share) using a conversion ratio designed to preserve the intrinsic value of such Issuer RSU.

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