SemGroup Corporation Information Request Form

Levi & Korsinsky, LLP has commenced an investigation into the fairness of the sale of SemGroup Corporation (“SemGroup” or the “Company”) (NYSE: SEMG) to Energy Transfer LP (“Energy Transfer”) (NYSE: ET). Under the terms of the deal, SemGroup shareholders will receive $6.80 per share in cash and 0.7275 of an Energy Transfer common unit for each SemGroup share.

The SemGroup merger investigation concerns whether the Board of SemGroup breached their fiduciary duties to stockholders by failing to adequately shop the Company before agreeing to enter into this transaction, and whether Energy Transfer is underpaying for SemGroup shares, thus unlawfully harming SemGroup shareholders.

To receive more information, please fill out the form.

Levi & Korsinsky, LLP does not share your information with others. There is no cost or obligation for you to submit.

This submission does not create an attorney-client relationship. If we believe that you might be an appropriate lead plaintiff, we will contact you to discuss whether to establish an attorney-client relationship.

Yes I'd Like to Join Action

This letter confirms that you have retained Levi & Korsinsky, LLP to represent you as a named plaintiff in the class action against SemGroup Corporation As a named plaintiff, you acknowledge that you owned shares in SemGroup Corporation prior to the recent takeover announcement and that you must maintain ownership in SemGroup Corporation throughout the litigation.

We agree to advance all expenses in the litigation, which means that you are not liable to pay any of the expenses of the lawsuit, whether attorneys’ fees or costs. Regardless of the result, we will never ask you to directly pay for any attorneys’ fees or costs. Should we obtain a favorable result, we may ask the court to award us compensation to be paid by the defendants or as a portion of any benefit, but, again, we will never ask you to directly pay any of the costs of this litigation.

As our client, you are entitled to direct the litigation in any way you deem proper, and may at any time order us to dismiss the case. Should you choose to do so, we will never ask you to reimburse us directly for any legal fees or expenses. During the course of this litigation, we may employ and/or work with other law firms to prosecute your case.

We look forward to representing you and other SemGroup shareholders.

Sincerely,

Levi & Korsinsky,LLP

Joseph Levi

AGREED: Sign Name Clear