Great Lakes Dredge & Dock Corporation – Indentures Watch

from 8-K 8 pages This Supplemental Indenture (This “Supplemental Indenture”), Dated April 1, 2026, Among Great Lakes Dredge & Dock Corporation, a Delaware Corporation (“GLDD”), Great Lakes Dredge & Dock Company, LLC, a Delaware Limited Liability Company (“GLDD LLC”), Nasdi Holdings, LLC, a Delaware Limited Liability Company (“Nasdi”), Great Lakes Environmental & Infrastructure Solutions, LLC, a Delaware Limited Liability Company (“Solutions”), Great Lakes U.S. Fleet Management, LLC, a Delaware Limited Liability Company (“Fleet”), Drews Services LLC, a South Carolina Limited Liability Company (“Drews Services”) (GLDD LLC, Nasdi, Solutions, Fleet and Drews Services, and Each Person Joined Hereto as a Guarantor From Time to Time, Collectively, the “Guarantors”, and Each a “Guarantor”), and Computershare Trust Company, N.A., as Successor to Wells Fargo Bank, National Association, as Trustee (The “Trustee”)

from 10-K 5 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934

from 8-K 129 pages Great Lakes Dredge & Dock Corporation, as Issuer, and the Guarantors Party Hereto, as Guarantors $325,000,000 5.25% Senior Notes Due 2029 Indenture Dated as of May 25, 2021 Wells Fargo Bank, National Association, as Trustee

from 10-K 3 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934

from 8-K 28 pages Registration Rights Agreement Dated as of May 24, 2017 Among Great Lakes Dredge & Dock Corporation the Guarantors Named Herein and Deutsche Bank Securities Inc. 8.000% Senior Notes Due 2022

from 8-K 114 pages Great Lakes Dredge & Dock Corporation as Issuer, and Any Guarantors Party Hereto, as Guarantors $325,000,000 8.000% Senior Notes Due 2022 Indenture Dated as of May 24, 2017 Wells Fargo Bank, National Association, as Trustee

from S-4/A 12 pages Great Lakes Dredge & Dock Corporation

from S-4 12 pages Great Lakes Dredge & Dock Corporation

from 8-K 5 pages Third Supplemental Indenture

from 8-K 33 pages Registration Rights Agreement Dated as of November 24, 2014 Among Great Lakes Dredge & Dock Corporation the Guarantors Named Herein and Deutsche Bank Securities Inc. 7.375% Senior Notes Due 2019

from 10-K 5 pages Second Supplemental Indenture

from 8-K 4 pages First Supplemental Indenture

from 8-K 29 pages Registration Rights Agreement Dated as of January 28, 2011 Among Great Lakes Dredge & Dock Corporation the Guarantors Named Herein and Deutsche Bank Securities Inc. Merrill Lynch, Pierce, Fenner & Smith Incorporated 7.375% Senior Notes Due 2019

from 8-K 111 pages Great Lakes Dredge & Dock Corporation as Issuer, and Any Guarantors Party Hereto, as Guarantors $250,000,000 7.375% Senior Notes Due 2019 Indenture Dated as of January 28, 2011 Wells Fargo Bank, National Association, as Trustee

from 10-K 2 pages This Certifies That, for Value Received

from 10-K 2 pages Fully Paid and Non-Assessable Shares of the Par Value of $.0001 Each of the Common Stock of Great Lakes Dredge & Dock Corporation

from 8-K ~5 pages December 28, 2006 Great Lakes Dredge & Dock Corporation (Formerly Great Lakes Dredge & Dock Holdings Corp.) Rockefeller Center 540 Madison Avenue, 17th Floor New York, Ny 10022 Ladies and Gentlemen: Reference Is Made to the Certificate of Incorporation of Great Lakes Dredge & Dock Corporation (Formerly Great Lakes Dredge & Dock Holdings Corp.) (The “Certificate”). Capitalized Terms Used Herein and Not Otherwise Defined Shall Have the Meanings Set Forth in the Certificate

from 8-K 6 pages Fourth Supplemental Indenture

from S-4/A 4 pages Number Shares C Great Lakes Dredge & Dock Holdings Corp. Incorporated Under the Laws of the State of Delaware Common Stock See Reverse for Certain Definitions This Certifies That Cusip Is the Owner of Fully Paid and Non-Assessable Shares of the Par Value of $.0001 Each of the Common Stock of Great Lakes Dredge & Dock Holdings Corp

from S-4/A 3 pages Number Shares C Great Lakes Dredge & Dock Holdings Corp. Incorporated Under the Laws of the State of Delaware Common Stock See Reverse for Certain Definitions This Certifies That Cusip Is the Owner of Fully Paid and Non-Assessable Shares of the Par Value of $.0001 Each of the Common Stock of Great Lakes Dredge & Dock Holdings Corp