Exhibit 3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

OF

THE NAVIGATORS GROUP, INC.

ARTICLE 1

The name of the corporation is: The Navigators Group, Inc.

ARTICLE 2

The address of the corporation’s registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, Wilmington, New Castle County, Delaware 19801. The name of the corporation’s registered agent at such address is The Corporation Trust Company.

ARTICLE 3

The purpose of the corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware unless the bylaws of the corporation provide otherwise.

ARTICLE 4

(a) The total number of shares of stock which the corporation shall have authority to issue is 5,000, all of which shall be common stock, and the par value of each such share shall be

$0.01.

(b) In addition to any and all powers conferred upon the Board of Directors by the laws of the State of Delaware, the Board of Directors shall have the authority to establish by resolution more than one class or series of shares, either preferred or common, and to fix the relative rights, restrictions and preferences of any such different classes or series, and the authority to issue shares of a class or series to another class or series to effectuate share dividends, splits or conversions of the corporation’s outstanding shares.

ARTICLE 5

Meetings of stockholders may be held within or outside the State of Delaware, as the bylaws of the corporation may provide. The books of the corporation may be kept outside the State of Delaware at such place or places as may be designated from time to time by the board of directors or in the bylaws of the corporation. Elections of directors need not be by written ballot unless the bylaws of the corporation so provide.

ARTICLE 6

No director shall be personally liable to the corporation or its stockholders for monetary damages for any breach of fiduciary duty by such director as a director. Notwithstanding the foregoing sentence, a director shall be liable to the extent provided by applicable law (i) for breach of the director’s duty of loyalty to the corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) pursuant to Section 174 of the Delaware General Corporation Law or (iv) for any transaction from which the director derived an improper personal benefit.

ARTICLE 7

Whenever a compromise or arrangement is proposed between this corporation and its creditors or any class of them and/or between this corporation and its stockholders or any class of them, any court of equitable jurisdiction within the State of Delaware may, on the application in a summary way of this corporation or of any creditor or stockholder thereof or on the application of any receiver or receivers appointed for this corporation under Section 291 of Title 8 of the Delaware Code or on the application of trustees in dissolution or of any receiver or receivers appointed for this corporation under Section 279 of Title 8 of the Delaware Code, order a meeting of the creditors or class of creditors and/or of the stockholders or class of stockholders of this corporation, as the case may be, to be summoned in such manner as the said court directs. If a majority in number representing three-fourths in value of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this corporation, as the case may be, agree to any compromise or arrangement and to any reorganization of this corporation as consequence of such compromise or arrangement, the said compromise or arrangement and the said reorganization shall, if sanctioned by the court to which the said application has been made, be binding on all the creditors or class of creditors, and/or on all the stockholders or class of stockholders, of this corporation, as the case may be, and also on this corporation.

ARTICLE 8

The corporation reserves the right to amend, alter, change or repeal any provision contained in this certificate of incorporation in the manner now or hereafter prescribed by applicable law, and all rights and powers conferred upon stockholders herein are granted subject to this reservation.