MEMORANDUM OPINION AND ORDER
This diversity action arises out of an alleged agreement to purchase the assets of an affiliate company of the defendant. Plaintiff Venture Associate Corporation (“Venture”) brings this single-count complaint against Zenith Data Systems Corporation (“ZDS”), claiming breach of contract. Presently before the court are (1) ZDS’s motion to dismiss pursuant to Fed.R.Civ.P. 12(b)(6), and (2) Venture’s motion to exclude exhibits attached to ZDS’s motion to dismiss. For the reasons set forth below, we deny Venture’s motion to exclude, and grant ZDS’s motion to dismiss.
I. Motion to Dismiss Standard
A motion to dismiss should not be granted unless it “appears beyond doubt that the plaintiff can prove no set of facts in support of his claims which would entitle him to relief.”
Conley v. Gibson,
II. Background
In November 1990, Venture received an unsolicited offer from Financiere Indosuez, the authorized broker for ZDS, to consider the purchase of ZDS’s Health Business. After preliminary negotiations, on May 31, 1991, Venture mailed to Financiere Indo-suez a signed “Letter of Intent” to purchase the assets of the Health Business for a price of $11 million. Thomas Kelly, Vice President Finance of ZDS, responded in writing on June 11, 1991, accepting in principle the terms and conditions of the Letter of Intent, and inviting negotiations to reach a definitive agreement. On June 12, 1991, Venture confirmed in writing its receipt and acceptance of the June 11 letter, and *790 indicated that it would begin to prepare the first draft of a definitive purchase agreement.
While reviewing the draft agreement submitted by Venture, on September 6, 1991, ZDS wrote Venture — knowing that the letter would be relied upon by prospective lenders — stating that the execution of a formal written agreement was anticipated on September 13, 1991, because substantial agreement on all major economic and legal aspects of the transaction had been reached. Thereafter, ZDS prepared a revised purchase agreement, sending it to Venture on September 11, 1991. On September 13, 1991, Venture returned the agreement, proposing minor, nonsubstan-tive changes and agreeing to immediately execute the document as amended. The agreement was never retyped by ZDS, and was never signed by the parties. Nonetheless, Venture contends that each side manifested mutual assent, culminating in an agreement with its terms embodied in the September 13, 1991 document, as amended by Venture’s minor handwritten notations.
Venture states that during early October, 1991, ZDS concluded that it had undervalued the assets of the Health Business by at least $3.5 million. Accordingly, on October 15, 1991, Financiere Indosuez, acting at the direction of ZDS, wrote to Venture, stating that the sale could only proceed upon adjustment of the purchase price. Venture considered this demand a breach of contract, yet in the interests of avoiding litigation met with ZDS to discuss the new term. Venture reviewed ZDS’s proposal and refused to execute a newly drafted sales agreement. On November 13, 1991, Thomas Kelly wrote to Venture and reiterated that the price of the Health Business stood at $14.5 million. Venture states that as of September 13, 1991, it had performed all of the conditions imposed under the agreement, and as a result of the breach suffered direct and consequential damages in excess of $3.5 million.
III. Motion to Exclude
In support of its motion to dismiss, ZDS attached as exhibits a copy of the complaint, the May 31, 1991 Letter of Intent, Thomas Kelly’s letter of June 11, 1991, and Venture’s letter of June 12, 1991. Noting that the additional documents were not attached to the complaint, Venture argues that these documents should be excluded or, in the alternative, that this court should treat the motion as one for summary judgment to be disposed of in accordance with Fed.R.Civ.P. 56. We take neither course.
It is settled law that documents integral to plaintiff’s claim, yet not appended to its complaint, will be considered part of the pleading if attached by a defendant in a motion to dismiss.
See Field v. Trump,
IV. Motion to Dismiss
As noted by the Seventh Circuit, courts are often confronted with “a pattern common in commercial life,”
Empro Mfg. Co. v. Ball-Co Mfg., Inc.,
Two firms reach concord on the general terms of their transaction. They sign a document, captioned “agreement in prin- *791 eiple” or “letter of intent”, memorializing these terms but anticipating further negotiations and decisions — an appraisal of the assets, the clearing of title, the list is endless. One of these terms proves divisive, and the deal collapses. The party that perceives itself the loser then claims that the preliminary document has legal force independent of the definitive contract.
The present case is analogous to the dispute described in Empro. The question raised in ZDS’s motion to dismiss is whether the documents exchanged by the parties, starting with the Letter of Intent dated May 31, 1991 and ending with the September 13, 1991 draft agreement as edited by Venture, form a legally binding contract. 1 We think not.
As discussed above, the proposed purchase of ZDS’s Health Business began with a “Letter of Intent” drafted by Venture and accepted in principle by ZDS. This preliminary agreement led to the exchange of various draft purchase agreements in the effort to solidify a definitive agreement. The initial draft agreement was drafted by Venture, representing an offer. ZDS responded on September 11, 1991, by sending a revised draft purchase
agreement
— i.e., a counteroffer. Such counteroffer is a rejection of the original offer, which expires and may not be accepted later.
Lee v. Voyles,
Under Illinois law, whether a writing setting forth all the essential terms of a contract, but contemplating a later execution of a formal agreement, is itself a contract as opposed to mere negotiation depends on the intent of the parties.
See Inland Real Estate Corp. v. Christoph,
Upon careful review of the unambiguous text and structure of the Letter of Intent, there can be no doubt that the *792 parties intended that the execution of a formal agreement be a condition precedent to a contractual obligation. Paragraph six of the Letter begins: “This proposal, of course, is subject to the preparation and execution of a mutually satisfactory Purchase Agreement (containing customary representations and warranties).” Similar language is contained in paragraph eight: “It is understood that this is merely a letter of intent subject to the execution by Seller and Buyer of a definitive Purchase Agreement ... [and] does not constitute a binding obligation on either of us.” Moreover, the Letter of Intent provides that “[u]pon acceptance by Seller of this letter, we shall commence the drafting of a definitive Purchase Agreement for submission to Seller and Seller’s counsel for review.” Finally, paragraph eight explicitly deals with the possibility that no binding obligation may result from future negotiations, providing: “If the acquisition contemplated hereby shall not become effective for any reason, each of the parties hereto shall pay its own expenses.”
Letters of intent and agreements in principle often ... do no more than set the stage for negotiations on details. Sometimes the details can be ironed out; sometimes they can’t. Illinois, as Chicago Investment, Interway, and Feldman [v. Allegheny Int’l, Inc.,850 F.2d 1217 (7th Cir.1987) (interpreting Illinois law)] show, allows the parties to approach agreement in stages, without fear that by reaching a preliminary understanding they have bargained away their privilege to disagree on the specifics. Approaching agreement by stages is a valuable method of doing business. So long as Illinois preserves the availability of this device, a federal court in a diversity case must send a the disappointed party home empty-handed.
Empro,
In a final attempt to salvage its complaint, Venture argues that the decision in
Quake Const. v. American Airlines, Inc.,
V. Conclusion
For the reasons set forth above, we deny Venture’s motion to exclude documents, and grant ZDS’s motion to dismiss the complaint pursuant to Fed.R.Civ.P. 12(b)(6). It is so ordered.
Notes
. It is undisputed that Illinois law applies in this action.
