Exhibit 4.1

[EXECUTION COPY]

REGISTRATION RIGHTS AGREEMENT

THIS REGISTRATION RIGHTS AGREEMENT (this “ Agreement ”) is made and entered into as of April 1, 2007 between Tribune Company, a Delaware corporation (the “ Company ”), EGI-TRB, L.L.C., a Delaware limited liability company (“ EGI-TRB ”), and GreatBanc Trust Company, not in its individual or corporate capacity, but solely as trustee (the “ ESOP Fiduciary ”) of the Tribune Employee Stock Ownership Trust, which forms a part of the Tribune Employee Stock Ownership Plan (the “ ESOP ,” and together with EGI-TRB, the “ Initial Stockholders ” and each, an “ Initial Stockholder ”).

WHEREAS, the Company, EGI-TRB and Samuel Zell, as Guarantor, have concurrently herewith entered into that certain Securities Purchase Agreement, dated April 1, 2007 (the “ Securities Purchase Agreement ”), pursuant to which EGI-TRB will purchase from the Company, as soon as practicable following the execution and delivery of this Agreement, (i) an aggregate of 1,470,588 newly-issued shares (the “ EGI-TRB Purchased Shares ”) of the Company’s common stock, par value $0.01 per share (the “ Common Stock ”), and (ii) an unsecured subordinated exchangeable promissory note in the principal amount of $200 million, which shall be exchangeable into shares of Common Stock (the “ Exchangeable Note ”).

WHEREAS, the Company and the ESOP Fiduciary, not in its individual or corporate capacity, but solely as trustee of the ESOP, have concurrently herewith entered into that certain ESOP Purchase Agreement, dated April 1, 2007 (the “ ESOP Purchase Agreement ”), pursuant to which the ESOP will purchase from the Company, as soon as practicable following the execution and delivery of this Agreement, an aggregate of 8,928,571 newly-issued shares of Common Stock (the “ ESOP Purchased Shares ” and together with the EGI-TRB Purchased Shares, the “ Purchased Shares ”).

WHEREAS, EGI-TRB, the ESOP Fiduciary, not in its individual or corporate capacity, but solely as trustee of the ESOP, Tesop Corporation, a Delaware corporation (“ Merger Sub ”), and the Company have concurrently herewith entered into that certain Agreement and Plan of Merger, dated as of April 1, 2007 (the “ Merger Agreement ”),   pursuant to which Merger Sub, a wholly owned subsidiary of the ESOP, will be merged with and into the Company, with the Company surviving the Merger (the “ Merger ”), on the terms and subject to the conditions set forth therein.

WHEREAS, in order to induce EGI-TRB and the ESOP Fiduciary, not in its individual or corporate capacity, but solely as trustee of the ESOP, to enter into the Securities Purchase Agreement and ESOP Purchase Agreement, respectively, the Company hereby agrees that this Agreement shall govern the rights of the Stockholders to cause the Company to register shares of Common Stock owned by or issuable to the Stockholders, and shall govern certain other matters as set forth in this Agreement.

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NOW, THEREFORE, in consideration of the mutual covenants contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby agree as follows:

SECTION 1.  Definitions .  In addition to the terms that are defined elsewhere in this Agreement, the following terms shall have the following meanings:

“ Affiliate ” means, with respect to a Person, another Person who, directly or indirectly, controls, is controlled by or is under common control with such Person, including, without limitation, any general partner, officer, director, or manager of such Person; provided , however , that no Person for whom the ESOP Fiduciary serves as trustee shall be deemed to be an Affiliate of the ESOP Fiduciary.

“ Agreement ” has the meaning specified in the first paragraph of this Agreement.

“ Business Day ” means each Monday, Tuesday, Wednesday, Thursday and Friday that is not a day on which banking institutions in The City of Chicago are authorized or obligated by law or executive order to close.

“ Chandler Registration Rights Agreement ” has the meaning specified in Section 10.

“ Common Stock ” has the meaning specified in the recitals to this Agreement.

“ Company ” has the meaning specified in the first paragraph of this Agreement.

“ Deferral Notice ” has the meaning specified in Section 3(i).

“ Deferral Period ” has the meaning specified in Section 3(i).

“ Demand Registration ” has the meaning specified in Section 2(a)(i).

“ EGI Transferee ” means any direct or indirect Affiliate of EGI-TRB, Equity Group Investments, L.L.C. or Samuel Zell, and any senior employee of Equity Group Investments, L.L.C. and any direct or indirect Affiliate thereof.

“ EGI-TRB ” has the meaning specified in the first paragraph of this Agreement.

“ EGI-TRB Purchased Shares ” has the meaning specified in the recitals to this Agreement.

“ EGI-TRB Restriction Termination Date ” has the meaning set forth in Section 2(a)(i).

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“ EGI-TRB Stockholders Representative ” has the meaning specified in Section 9(a).

“ ESOP ” has the meaning specified in the first paragraph of this Agreement.

“ ESOP Fiduciary ” has the meaning specified in the first paragraph of this Agreement.

“ ESOP Purchase Agreement ” has the meaning specified in the recitals to this Agreement.

“ ESOP Purchased Shares ” has the meaning specified in the recitals to this Agreement.

“ ESOP Restriction Termination Date ” has the meaning set forth in Section 2(a)(i).

“ ESOP Stockholders Representative ” has the meaning specified in Section 9(a).

“ Exchange Act ” means the Securities Exchange Act of 1934, as amended, and the rules and regulations of the SEC promulgated thereunder.

“ Exchangeable Note ” has the meaning specified in the recitals to this Agreement.

“ Initial Stockholders ” and “ Initial Stockholder ” have the meaning specified in the first paragraph of this Agreement.

“ Issuer Free Writing Prospectus ” has the meaning specified in Section 2(d).

“ Lock-up Period ” has the meaning specified in Section 2(c).

“ Material Event ” has the meaning specified in Section 3(i).

“ Merger ” has the meaning specified in the recitals to this Agreement.

“ Merger Agreement ” has the meaning specified in the recitals to this Agreement.

“ Merger Sub ” has the meaning specified in the recitals to this Agreement.

“ Merger Termination Date ” means the date the Merger Agreement is terminated, without consummation of the Merger, pursuant to Article VII thereof.

“ Permitted Transferee ” means any EGI Transferee and any member of the Zell Family Group.

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“ Person ” shall mean any individual, corporation, partnership, joint venture, association, joint-stock company, limited liability company, trust, unincorporated organization or government or other agency or political subdivision thereof.

“ Piggyback Registration ” has the meaning specified in Section 2(b)(i).

“ Prospectus ” means the prospectus included in any Registration Statement, as amended or supplemented by all amendments and prospectus supplements, including post-effective amendments, and all materials incorporated by reference or explicitly deemed to be incorporated by reference in such Prospectus.

“ Purchase Date ” means the date on which the purchase and sale of the Purchased Shares and the Exchangeable Note are consummated at the First Closing (as defined in the Securities Purchase Agreement).

“ Purchased Shares ” has the meaning specified in the recitals to this Agreement.

“ Registrable Securities ” means (a) the Purchased Shares, (b) any shares of Common Stock issued by the Company to the Stockholders pursuant to the Exchangeable Note or (c) any equity security issued with respect to any shares of Common Stock referred to in clauses (a) or (b) above upon any stock dividend, split, merger or similar event.  As to any particular Registrable Securities, such securities shall cease to be Registrable Securities on the earliest of the date on which such securities: (x) have been effectively registered under the Securities Act and disposed of in accordance with a Registration Statement; (y) have been sold to the public pursuant to Rule 144 or may be sold or transferred pursuant to Rule l44(k) (or any similar provision then in force, but not Rule 144A) under the Securities Act; or (z) cease to be outstanding (whether as a result of redemption, repurchase and cancellation, conversion or otherwise).

“ Registration Statement ” means any registration statement of the Company that covers any of the Registrable Securities pursuant to the provisions of this Agreement, including the Prospectus, amendments and supplements to such registration statement, including post-effective amendments, all exhibits, and all materials incorporated by reference or explicitly deemed to be incorporated by reference in such registration statement.

“ Restriction Termination Dates ” has the meaning set forth in Section 2(a)(i).

“ Rule 144 ” means Rule 144 under the Securities Act, as such Rule may be amended from time to time, or any similar or successor rule or regulation hereafter adopted by the SEC having substantially the same effect as such Rule.

“ Rule 145 ” means Rule 145 under the Securities Act, as such Rule may be amended from time to time, or any similar or successor rule or regulation hereafter adopted by the SEC having substantially the same effect as such Rule.

“ SEC ” means the United States Securities and Exchange Commission and any successor agency.

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“ Securities Act ” means the Securities Act of 1933, as amended, and the rules and regulations promulgated by the SEC thereunder.

“ Securities Purchase Agreement ” has the meaning specified in the recitals to this Agreement.

“ Stockholders ” means the Initial Stockholders and any Permitted Transferees of the Initial Stockholders to whom Registrable Securities and/or the Exchangeable Note are properly transferred and, in each case, who continue to be entitled to the rights of a Stockholder hereunder.

“ Stockholder Indemnified Person ” has the meaning specified in Section 6(a).

“ Stockholder Representatives ” and “ Stockholder Representative ” have the meaning specified in Section 9(a).

“ Zell Family Group ” shall mean Samuel Zell and his spouse, lineal ancestors and descendants (whether natural or adopted), and any trust or retirement account primarily for the benefit of Samuel Zell and/or his spouse, lineal ancestors and descendants.

SECTION 2.  Registrations and Transfer Restrictions .

(a) Demand Registrations .

(i) Each Stockholder Representative may, subject to Sections 2(a)(ii) and 2(a)(iv), request up to three registrations under the Securities Act of all or any portion of (A) its Registrable Securities and (B) any Registrable Securities of a Stockholder to whom such Stockholder Representative has properly assigned its rights under this Section 2(a) (each such registration request, a “ Demand Registration ”), subject to a minimum of $50 million of Registrable Securities in any Demand Registration; provided that, in the case of a Demand Registration requested by the EGI-TRB Stockholders Representative, the Company shall not be required to file such requested registration prior to the third anniversary of the Purchase Date (the “ EGI-TRB Restriction Termination Date ”) and, in the case of a Demand Registration requested by the ESOP Stockholders Representative, the Company shall not be required to file such requested registration prior to the first anniversary of the date hereof (the “ ESOP Restriction Termination Date ” and, together with the EGI-TRB Restriction Termination Date, the “ Restriction Termination Dates ”); provided , further , that each Stockholder Representative may make such request up to 90 days prior to the applicable Restriction Termination Date for a filing on or after the applicable Restriction Termination Date.  Each request for a Demand Registration shall specify the number of Registrable Securities requested to be registered and the intended method of distribution thereof (it being understood that no Demand Registration shall require the Company to effect a shelf registration statement).

(ii) A registration requested pursuant to this Agreement shall be deemed to have been effected for purposes of Section 2(a)(i) if (A) it has been declared effective by the SEC, (B) at least 80% of the Registrable Securities requested to be included in such Demand Registration (after giving effect to any reduction pursuant to Section 2(a)(iii)) shall have been

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registered and, in the case of an underwritten offering, sold, (C) it has not failed to remain effective for the period set forth in Section 3(c) and (D) the offering of Registrable Securities pursuant to such Demand Registration has not been subject to any stop order or injunction or other order or requirement of the SEC lasting more than 45 days and preventing the offering of Registrable Securities thereunder.

(iii) In connection with a Demand Registration pursuant to which an underwritten public offering is requested as the intended method of distribution pursuant to Section 2(a)(i), if the managing underwriters advise the Company in writing, with a copy to be delivered to the requesting Stockholder Representative, that, in their opinion, the number of Registrable Securities requested to be included in such offering exceeds the largest number of securities which can be sold therein without adversely affecting the marketability of the offering and within a price range reasonably acceptable to the requesting Stockholder Representative, the Company shall include in such registration the amount of Registrable Securities requested to be included which in the opinion of such underwriters can be sold without adversely affecting the marketability of the offering; provided , that if the number of Registrable Securities to be included in the registration is less than 75% of the number requested to be so included, the requesting Stockholder Representative shall be entitled to withdraw its request for a Demand Registration in lieu of the registration of such lesser amount of Registrable Securities and, if such request is withdrawn, such Demand Registration shall not count as one of the permitted Demand Registrations hereunder.

(iv) The Company shall not be obligated to effect any Demand Registration within (A) 180 days after the effective date of a previous Demand Registration or (B) 120 days after the date of a previous Piggyback Registration in which the Stockholder participates pursuant to Section 2(b).  The Company may postpone or suspend, as applicable, for no more than two periods in any 12-month period aggregating not more than 120 days in such 12-month period the filing, effectiveness or use of a registration statement for a Demand Registration (and the Stockholder agrees not to offer or sell any Registrable Securities pursuant to such Registration Statement during such deferral or suspension), pursuant to this Section 2(a)(iv) or clause (C) of Section 3(i), if the Company’s board of directors determines in good faith that such filing or effectiveness would (A) interfere with or adversely affect in any material respect the negotiation or completion of any material transaction or other Material Event that is being contemplated by the Company or (B) involve initial or continuing disclosure obligations relating to a Material Event, the disclosure of which could, in the reasonable judgment of the Company, be materially adverse to its interests; provided , that in the event of such a postponement of registration, each requesting Stockholder Representative shall be entitled to withdraw its request for a Demand Registration and, if such request is withdrawn, such Demand Registration shall not count as one of the permitted Demand Registrations hereunder.  In the event the Company shall exercise its deferral or suspension rights hereunder following the effectiveness of a registration statement filed in response to the request for a Demand Registration, the applicable time period during which the registration statement is to remain effective under Section 3(c) shall be extended by a period of time equal to the duration of such deferral or suspension.  The number and length of deferral and suspension periods in any 12-month period under this Section 2(a)(iv) shall be aggregated with the number and the length of Deferral Periods under clause (C) of Section 3(i), such that the Company shall not be permitted to postpone or suspend, for more

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than two periods in any 12-month period aggregating not more than 120 days in such 12-month period the filing, effectiveness or use of a registration statement for a Demand Registration pursuant to this Section 2(a)(iv) and/or clause (C) of Section 3(i) taken together.

(v) In connection with any Demand Registration, the requesting Stockholder Representative shall have the right to designate a nationally recognized underwriter or underwriters as the lead or managing underwriter(s) of such underwritten offering who shall be reasonably acceptable to the Company.  In connection with any such underwritten offering, each Stockholder holding Registrable Securities to be included in such registration and the Company agree that they will each enter into a customary underwriting agreement with the underwriter(s) selected pursuant to the preceding sentence.

(b) Piggyback Registrations .

(i) If the Company proposes to register Common Stock (for its own account or for the account of any other holder of its securities) under the Securities Act (other than pursuant to a Demand Registration which shall be governed by Section 2(a), and registrations on Form S-4 or Form S-8 or on any successor or other form promulgated for similar purposes or relating to a Rule 145 transaction) at any time after the applicable Restriction Termination Date and the registration form to be used may be used for the registration of Registrable Securities for sale to the public under the Securities Act (a “ Piggyback Registration ”), then the Company shall give prompt written notice to each applicable Stockholder Representative of its intention to effect such a registration and, subject to the terms hereof, shall use reasonable best efforts to include in such registration all Registrable Securities with respect to which the Company has received written requests for inclusion therein from such Stockholder Representative (which request shall specify the number of Registrable Securities intended to be disposed of by such Stockholder Representative and any Registrable Securities of a Stockholder to whom such Stockholder Representative has properly assigned its rights under this Section 2(b)) within 20 days after such Stockholder Representative receives the Company’s notice; provided , that (A) if, at any time after giving written notice of its intention to register any securities and prior to the effective date of the registration statement filed in connection with such registration, the Company shall determine for any reason not to proceed with the proposed registration, the Company may, at its election, give written notice of such determination to the applicable Stockholder Representatives and thereupon shall be relieved of its obligation to register any Registrable Securities in connection with such registration, (B) if such registration involves an underwritten offering by the Company, each Stockholder holding Registrable Securities to be included in such registration must sell its Registrable Securities to such underwriters who shall have been selected by the Company on the same terms and conditions as apply to the Company, with such differences, including any with respect to indemnification and contribution, as may be customary or appropriate in combined primary and secondary offerings and (C) if such registration involves an underwritten secondary offering on behalf of holders of the Company’s securities other than the Stockholders pursuant to a demand or similar registration right, each applicable Stockholder Representative may, in lieu of exercising its rights on its own behalf and/or on behalf of other Stockholders under this Section 2(b), elect (by written notice sent to the Company within ten (10) Business Days from the date of the Company’s notice pursuant to this Section 2(b)(i)) to include all or a portion of its Registrable Securities and any

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Registrable Securities of a Stockholder to whom such Stockholder Representative has properly assigned its rights under Section 2(a) in such demand registration (it being understood that, subject to Section 2(a)(ii), such a registration shall be deemed to be one of such Stockholder Representative’s Demand Registrations).

(ii) If a Piggyback Registration is an underwritten primary offering on behalf of the Company, and the managing underwriters advise the Company in writing that in their opinion the number of securities requested to be included in such offering exceeds the largest number of securities which can be sold therein without adversely affecting the marketability of the offering and within a price range reasonably acceptable to the Company, the Company shall include in such registration (A) first, the securities the Company proposes to sell and (B) second, the Registrable Securities requested to be included in such registration by the applicable Stockholder Representatives and any other securities requested to be included in such registration, pro rata among the holders of all such securities (including the Registrable Securities of the Stockholders) on the basis of the number of securities of the Company owned by each such holder.

(iii) If a Piggyback Registration is an underwritten secondary offering on behalf of holders of the Company’s securities other than the Stockholders, and the managing underwriters advise the Company in writing that in their opinion the number of securities requested to be included in such offering exceeds the largest number of securities which can be sold in such offering without adversely affecting the marketability of the offering and within a price range reasonably acceptable to the holders of the Company’s securities requesting such registration other than the Stockholders, the Company shall include in such registration (A) first, the securities requested to be included therein by the holders of registrable securities requesting such registration, including Registrable Securities included therein pursuant to Section 2(b)(i)(C), pro rata among the holders of all such securities on the basis of the number of securities of the Company owned by each such holder and (B) second, Registrable Securities requested to be included in such registration by the applicable Stockholder Representatives (other than Registrable Securities included pursuant to clause (A) above) and any other securities requested to be included in such registration, pro rata among the holders of all such securities on the basis of the number of securities of the Company owned by each such holder.  For the avoidance of doubt, the parties hereto agree that the Company may offer registration rights in the future that have reciprocal piggyback registration provisions that permit the holder of such registration rights to exercise one of its demand registrations following a Demand Registration request from a Stockholder Representative and be treated pari passu with the Stockholders participating in such Demand Registration in the event of an underwritten offering cutback of the type contemplated by this paragraph (iii).

(iv) The Company shall have the right to select the investment banker(s) and/or manager(s) to administer the offering in connection with any Piggyback Registration.

(v) Each Stockholder holding Registrable Securities to be included in a registration pursuant to this Section 2(b) agrees that it will execute such other customary agreements as the Company may reasonably request to further accomplish the purposes of this Section 2(b).

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(c) Holdback Agreement .  Upon the written request of the underwriters managing an underwritten registered public offering of the Common Stock, the Stockholders shall not effect any public sale or distribution (including sales pursuant to Rule 144) of equity securities of the Company, or any securities convertible into or exchangeable or exercisable for such securities, during the 7 days prior to, and during the 90-day period beginning on, the effective date of the registration statement relating to such underwritten offering (the “ Lock-Up Period ”); provided , however , that if (i) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or a Material Event relating to the Company occurs or (ii) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in either case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the occurrence of the Material Event, as applicable, unless the underwriters managing such underwritten registered public offering of the Common Stock waive, in writing, such extension.

(d) Issuer Free-Writing Prospectuses .  The Company represents and agrees that, unless it obtains the prior consent of each of the Stockholder Representatives or the approval of the counsel for each of the Stockholder Representatives, and each of the Stockholders represents and agrees that, unless it obtains the prior consent of the Company, it will not make any offer relating to the Registrable Securities that would constitute an “issuer free writing prospectus,” as defined in Rule 433 under the Securities Act (an “ Issuer Free Writing Prospectus ”), or that would otherwise constitute a “free writing prospectus,” as defined in Rule 405 under the Securities Act, required to be filed with the SEC.  The Company represents that any Issuer Free Writing Prospectus will not include any information that conflicts with the information contained in a Registration Statement or Prospectus and that any Issuer Free Writing Prospectus, when taken together with the information in the Registration Statement and the Prospectus, will not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading.

(e) Transfer Restrictions .  Notwithstanding anything to the contrary contained herein, EGI-TRB hereby agrees that from the Merger Termination Date until the EGI-TRB Restriction Termination Date, it shall not and shall not offer to, directly or indirectly (including by means of a transfer of EGI-TRB), sell, assign, give, mortgage, pledge, hypothecate, hedge, issue, bequeath or in any manner encumber or dispose of, or permit to be sold, assigned, encumbered, attached or otherwise disposed of in any manner, whether voluntarily, involuntarily or by operation of law, with or without consideration, the Exchangeable Note or the Registrable Securities (without giving effect to the second sentence of the definition of Registrable Securities) held by EGI-TRB, other than to a Permitted Transferee who agrees to be bound by these transfer restrictions.

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SECTION 3.  Registration Procedures .  Whenever a Stockholder Representative has properly requested that any Registrable Securities be registered pursuant to this Agreement, the Company shall use reasonable best efforts to effect the registration under the Securities Act of the offering a