Exhibit 5.2

June 11, 2014

Board of Directors

The Laclede Group, Inc.

720 Olive Street

St. Louis Missouri 63101

Registration Statement on Form S-3

File No. 333- 190388

Ladies and Gentlemen:

We have acted as special counsel to The Laclede Group, Inc., a Missouri corporation (the “Company”), in connection with the registration, pursuant to a Registration Statement on Form S-3, as amended (File No. 333-190388) (the “Registration Statement”), filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Act”), of the offering and sale by the Company of 2,875,000 corporate units of the Company (including 375,000 corporate units pursuant to the Underwriters’ (as defined below) option to purchase additional corporate units) (the “Corporate Units”), pursuant to the terms of an underwriting agreement, dated June 5, 2014 (the “Underwriting Agreement”), by and among the Company and the several underwriters named on Exhibit A thereto for whom Credit Suisse Securities (USA) LLC and Wells Fargo Securities, LLC acted as representatives (collectively, the “Underwriters”). This opinion is being furnished in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Act.

Each Corporate Unit initially consists of (a) a 1/20th, or 5%, undivided beneficial ownership interest in $1,000 principal amount of the Company’s 2014 Series A 2.00% Remarketable Junior Subordinated Notes due 2022 (the “Notes”) and (b) a stock purchase contract (a “Purchase Contract”) issued by the Company pursuant to which the holder of the related Corporate Unit will purchase from the Company on April 1, 2017, subject to earlier termination or settlement, for an amount in cash equal to the stated amount per security of $50, a number of shares of common stock of the Company (the “Shares”), as set forth in the Purchase Contract and Pledge Agreement, dated as June 11, 2014 (the “Purchase Contract and Pledge Agreement”), by and between the Company and U.S. Bank National Association (“U.S. Bank”), as Purchase Contract Agent, Collateral Agent, Custodial Agent, and Securities Intermediary. The Notes are being issued pursuant to the Junior Subordinated Indenture (the “Base Indenture”), as supplemented by the First Supplemental Indenture thereto (the “Supplemental Indenture” and together with the Base Indenture, the “Indenture”), each dated as of June 11, 2014 and by and between the Company and U.S. Bank, as Trustee (the “Trustee”). Pursuant to the Purchase Contract and Pledge Agreement, a holder of Corporate Units may, at its option, elect to create treasury units (the “Treasury Units”). The term “Equity Units” includes both Corporate Units and Treasury Units.

The Laclede Group, Inc.

June 11, 2014

Page 2

We have either participated in the preparation of or have reviewed and are familiar with, the Registration Statement, together with the exhibits thereto and the documents incorporated by reference therein, and the Prospectus dated June 3, 2014 forming part of the Registration Statement (the “Prospectus”), as supplemented by the Prospectus Supplement dated June 5, 2014, filed with the Commission pursuant to Rule 424(b) of the Act relating to the offering of the Corporate Units (the “Prospectus Supplement”). We have also reviewed the Indenture, the form of global certificate representing the Notes, the forms of global certificates representing the Equity Units, the Purchase Contract and Pledge Agreement and the Underwriting Agreement (collectively, the “Transaction Documents”). In addition, we have examined originals or certified copies of such corporate records of the Company and other certificates and documents of officials of the Company, public officials and others as we have deemed appropriate for purposes of this letter.

We have assumed the genuineness of all signatures, the legal capacity of all natural persons, the authenticity of all documents submitted to us as originals and the conformity to authentic original documents of all copies submitted to us as conformed, certified or reproduced copies and the conformity of the Notes and the Equity Units to the forms thereof that we have reviewed. In our examination of documents, we have also assumed (a) the due organization, valid existence and good standing under the laws of its jurisdiction of organization of each party to the Transaction Documents, (b) the legal capacity of natural persons, (c) the corporate or other power and due authorization of each of the Company and the other parties signatory thereto to execute, deliver and perform its obligations under the Transaction Documents, and to consummate the transactions contemplated therein, and (d) the due execution and delivery of the Transaction Documents by all parties thereto and (e) that the Transaction Documents constitute the valid and binding obligation of each party thereto, other than the Company. As to various questions of fact relevant to this letter, we have relied, without independent investigation, upon certificates of public officials and certificates of officers of the Company, all of which we assume to be true, correct and complete.

Based upon the foregoing, and subject to the assumptions, exceptions, qualifications and limitations set forth herein, we are of the opinion that:

1. Upon (a) the due execution of the Equity Units by the Company and U.S. Bank, as attorney-in-fact of the holders thereof, (b) the due authentication of the Equity Units by the Purchase Contract Agent under the Purchase Contract and Pledge Agreement, and (c) the delivery of the Equity Units against the consideration provided for in the Purchase Contract and Pledge Agreement and the Underwriting Agreement, the Equity Units, including the Purchase Contracts forming a part thereof, will constitute valid and binding obligations of the Company.

2. Upon (a) the due execution of the Notes by the Company, (b) the due authentication of the Notes by the Trustee pursuant to the Indenture, and (c) the delivery of the Corporate Units against payment therefor in accordance with the Underwriting Agreement, the Notes will constitute valid and binding obligations of the Company.

The Laclede Group, Inc.

June 11, 2014

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The opinions and other matters in this letter are qualified in their entirety and subject to the following:

We hereby consent to the filing of this opinion as an exhibit to a Current Report on Form 8-K filed by the Company with the Commission on or about the date hereof, to the incorporation by reference of this opinion into the Registration Statement and to the use of our name in the Prospectus and the Prospectus Supplement, in each case forming a part of the Registration Statement and under the caption “Legal Matters”. In giving this consent, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Act and the rules and regulations thereunder.