Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this joint proxy statement/ prospectus. Any representation to the contrary is a criminal offense.

SUMMARY

      This summary highlights material information from this joint proxy statement/ prospectus. It may not contain all of the information that is important to you. To better understand the merger, we urge you to read carefully this entire joint proxy statement/ prospectus and the documents we refer to in this joint proxy statement/ prospectus. Please see “Where You Can Find More Information” beginning on page 112. A copy of the merger agreement itself is attached to this joint proxy statement/ prospectus as Annex A. We urge you to read carefully the entire merger agreement and the other documents attached to this joint proxy statement/ prospectus.

The Companies

      Stellent is a leading provider of content management software solutions that allow browser-based Web and wireless access to content-rich business Websites and content-supported e-business applications. Stellent’s Universal Content Management architecture provides all five content management elements — Web content management, document management, collaboration, records management and digital asset management — from a single technology platform and interface. The Stellent technology enables customers to rapidly deploy business Websites by automating the content contribution, conversion, management and publishing processes for these sites. The solution allows content from a wide variety of enterprise sources, including desktop applications, business applications and templates, to be automatically converted to output formats such as XML, HTML, WML, cHTML and PDF. In addition, the personalization features of Stellent’s products and their compatibility with corporate security models ensure users access only the information they need. For further information, visit Stellent’s Website at http://www.stellent.com. Information on Stellent’s Website is not a part of, and is not being incorporated by reference into, this joint proxy statement/ prospectus.

      Optika is a leading provider of enterprise content management, or ECM, technology, including document imaging, workflow, collaboration and records management software. Optika’s Acorde family of ECM software solutions, including Acorde Context^TM, Acorde Process^TM, Acorde Resolve^TM, Acorde Application Link^TM and Acorde Records Management^TM, allows companies to streamline their business processes, eliminate paper, increase operational efficiencies and effectively leverage their enterprise resource planning and line-of-business systems. Acorde provides the ability to manage compliance requirements, access and store multiple formats of business content, both digital and non-digital; automate processes across the organization and externally with partners and customers; and enable online collaboration around these paper-intensive or complex processes in real and near time. Acorde supports a wide spectrum of critical business operations, including accounts payable, accounts receivable, claims processing, expense reporting, records management and human resources. For further information, visit Optika’s Website at http://www.optika.com. Information on Optika’s Website is not a part of, and is not being incorporated by reference into, this joint proxy statement/ prospectus.

      STEL Sub, Inc. is a Delaware corporation and a direct wholly owned subsidiary of Stellent. STEL Sub, Inc. was formed exclusively for the purpose of completing the merger.

      Stellent. Stellent’s board of directors has unanimously agreed that the merger is advisable and in the best interest of Stellent and its shareholders. In reaching its decision, the Stellent board of directors identified several reasons for, and potential benefits of, the merger to Stellent shareholders. These potential benefits include the following:

      Optika. The Optika board of directors has unanimously agreed that the merger is advisable and in the best interests of Optika and its stockholders. In reaching its decision, the Optika board of directors identified several reasons for, and potential benefits of, the merger to Optika stockholders, including the following:

      Stellent Shareholders. After careful consideration, the Stellent board of directors unanimously recommends that the Stellent shareholders vote “FOR”approval of the issuance of Stellent shares pursuant to the merger agreement.

      Optika Stockholders. The Optika board of directors believes that the merger is in the best interests of Optika and its stockholders and, after careful consideration, recommends that Optika stockholders vote “FOR” approval of the merger agreement and the merger and the amendment to the certificate of designation.

      Stellent. RBC Dain Rauscher Inc., a member of RBC Capital Markets, referred to in this joint proxy statement/prospectus as RBC, has given a written opinion, dated January 11, 2004, to the Stellent board of directors as to the fairness on that date, from a financial point of view, of the total consideration to be paid in the merger. The full text of this opinion is attached to this joint proxy statement/ prospectus as Annex E. You should read the opinion carefully in its entirety to understand the procedures followed, assumptions made, matters considered, and limitations on the review undertaken by RBC in providing its opinion. The opinion of RBC is directed to the Stellent board of directors and does not constitute a recommendation to any Stellent shareholder as to any matter relating to the merger.

      Optika. Revolution Partners, LLC has given a written opinion, dated January 11, 2004, to the Optika board of directors as to the fairness on that date, from a financial point of view, of the consideration to be received by the holders of Optika capital stock in the merger. The full text of this opinion is attached to this joint proxy statement/ prospectus as Annex F. You should read the opinion carefully in its entirety to understand the procedures followed, assumptions made, matters considered and limitations on the review undertaken by Revolution Partners in providing its opinion. The opinion of Revolution Partners is directed to the Optika board of directors and does not constitute a recommendation to any Optika stockholder as to any matter relating to the merger. Optika agreed to pay Revolution Partners a customary financial advisory fee, a substantial portion of which will be received upon the consummation of the merger. The board of directors of Optika was aware of this fee structure and took it into account in considering Revolution Partners’ opinion and in approving the merger.

      In considering the recommendation of Optika’s board of directors in favor of approval of the merger agreement and the merger, Optika stockholders should be aware that some of Optika’s directors and executive officers have interests in the merger that are different from, or in addition to, the interests of Optika stockholders generally. Optika’s board of directors was aware of and considered these interests when it considered and approved the merger agreement. The interests include the potential for those individuals to obtain positions as directors or officers of Stellent, the acceleration of vesting of certain stock options, the receipt of severance and other benefits under employment agreements, and the right to continued indemnification and insurance coverage for the benefit of current and former Optika directors and officers. In particular:

      Stellent. The nine directors and executive officers of Stellent, holding, in the aggregate, approximately 10.6% of the outstanding shares of Stellent common stock on the record date, have entered into a voting agreement with Optika and have delivered irrevocable proxies granting to Optika the right to vote all of the Stellent common stock owned by them in favor of the issuance of Stellent common stock in the merger. We have attached a copy of the Stellent voting agreement as Annex B to this joint proxy statement/ prospectus.

      Optika. Ten Optika stockholders, each a director or officer of Optika, holding, in the aggregate, approximately 1.8% of the outstanding shares of Optika common stock on the record date, have entered into a voting agreement with Stellent and have delivered irrevocable proxies granting to Stellent the right to vote all of the Optika common stock owned by them in favor of the Optika merger proposals. We have attached a copy of the Optika voting agreement, as amended, as Annex C to this joint proxy statement/ prospectus.

      TWCP Written Consent and Voting Agreement. In connection with the execution of the merger agreement, Stellent and Optika entered into a written consent and voting agreement with Thomas Weisel Capital Partners, L.P., referred to in the joint proxy statement/prospectus as TWCP, and certain related entities, which hold as of the date of this joint proxy statement/ prospectus, approximately 95% of the outstanding shares of Optika’s preferred stock. In that agreement, the TWCP entities agreed, among others things, to:

      Pursuant to the TWCP written consent and voting agreement, Optika and Stellent have agreed, among other things, to indemnify TWCP and the other entities party to the TWCP written consent and voting agreement against any and all damages suffered by such parties arising out of or in connection with the performance by such parties of their obligations under the agreement or certain actions that may be brought in connection with the merger.

      We have attached a copy of the TWCP written consent voting agreement as Annex D to this joint proxy statement/ prospectus.

      Upon completion of the merger, each outstanding Optika stock option will be converted into an option to purchase a number of shares of Stellent common stock that is equal to the product of the ratio at which each outstanding share of Optika common stock will be converted into Stellent common stock under the merger agreement multiplied by the number of shares of Optika common stock that would have been obtained before the merger upon the exercise of the option, rounded to the nearest whole share. The exercise price per share will be equal to the exercise price per share of Optika common stock subject to the option before the conversion divided by the ratio at which each outstanding share of Optika common

      The merger will be treated as a “purchase” for accounting purposes.

Regulatory Matters (See page 77.)

      Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, known as the HSR Act, if the amount of consideration to be paid by Stellent to the common and preferred stockholders of Optika were valued at $50 million or more for the entire 45-day period prior to the effective date of the merger, Stellent and Optika would not be allowed to complete the merger until they had furnished information required by the HSR Act to the Antitrust Division of the United States Department of Justice and the Federal Trade Commission and the applicable HSR Act waiting period had expired or been terminated. Based on the number of shares of common stock of Optika outstanding at January 30, 2004, as long as the price of Stellent’s common stock closes below approximately $9.73 on at least one day during the 45-day period prior to the effective date of the merger, Stellent and Optika would not be required to furnish certain information under the HSR Act or wait for HSR Act waiting period to expire or be terminated.

Material Terms of the Merger Agreement

      Conversion of Optika Common Stock in the Merger (See page 79.) Upon completion of the merger, Optika stockholders will be entitled to receive, for each share of Optika common stock, 0.44 of a share of Stellent common stock, subject to adjustment based on the average closing price of a share of Stellent common stock during the ten consecutive trading days ending on, and including, the third trading day before the closing date of the merger. If the value of 0.44 of a share of Stellent common stock, based on the average closing price during that period, is greater than $4.00, a portion of the shares of Stellent common stock that otherwise would have been issued to holders of the Optika common stock instead will be allocated pro rata to holders of the Optika preferred stock. If any shares of Stellent common stock are allocated to the holders of the Optika preferred stock, the total number of shares so allocated, will be equal to:

      If any shares of Stellent common stock that otherwise would have been issued to the holders of Optika common stock are allocated to the holders of the Optika preferred stock, Optika common stockholders will be entitled to receive, for each share of Optika common stock, a portion of a share of Stellent common stock equal to:

      Stellent will not issue fractional shares in the merger. As a result, the total number of shares of Stellent common stock that you receive in the merger will be rounded down to the nearest whole number. You will receive a cash payment for the value of the remaining fraction of a share of Stellent common stock that you would otherwise have received, based on the average of the trading price of Stellent

      Conversion of Optika Preferred Stock in the Merger (See page 80.) Upon completion of the merger, holders of Optika’s preferred stock will receive an aggregate of $10 million in cash and, if the value of 0.44 of a share of Stellent common stock, based on the average Stellent closing price over a period ending shortly before the merger is consummated, is greater than $4.00, an amount (in the form of newly issued shares of Stellent common stock) equal to 20% of the value of the total number of outstanding shares of Optika common stock multiplied by the difference between the value of 0.44 of a share of Stellent common stock and $4.00. Such additional amount, if any, will be allocated on a pro rata basis to the holders of the Optika preferred stock.

      Conversion Examples (See page 79). The following table shows rates at which the Optika common stock and Optika preferred stock would be converted into Stellent common stock in the merger based on various assumed values for the average closing price of a share of Stellent common stock over a period ending shortly before the merger is consummated. In each of the examples, 9.3 million shares of Optika common stock, and 731,851 shares of Optika preferred stock, are assumed to be outstanding at the effective time of the merger. In each case, in addition to a portion of a share of Stellent common stock, each share of Optika preferred stock will convert into the right to receive $13.664 in cash. In all of the examples, a total of 4,092,000 shares of Stellent common stock would be issued in exchange for all of the outstanding shares of Optika common stock and the outstanding shares of Optika preferred stock.

      The assumed Stellent average closing prices are presented for illustrative purposes only. They imply no representation regarding the value or expected market price of any security at any time. Actual trading prices will vary based on market factors.

Optika Common Stock

Optika Preferred Stock

      Conditions to Completion of the Merger (See page 85.) Stellent and Optika will not be required to complete the merger unless specified conditions are satisfied, including:

      In addition, Stellent will not be required to complete the merger unless specified conditions are satisfied, including:

      Neither Stellent or Optika has any present intention of waiving any condition to the merger.

      Termination of the Merger Agreement (See page 87.) Stellent and Optika can jointly agree to terminate the merger agreement at any time before completing the merger. In addition, either company can terminate the merger agreement if:

      The merger agreement may also be terminated by Optika if, at any time before the Optika stockholders meeting, Optika receives an unsolicited acquisition offer from a third party, and the board of directors of Optika determines the offer is reasonably likely to be more favorable to Optika’s stockholders than the merger with Stellent and for which financing, to the extent required, is committed or reasonably capable of being obtained. However, before terminating the merger agreement, Optika must have, among other things, given Stellent at least five business days’ notice and, during that period, a chance to propose such amendments to the terms of the merger agreement as would enable Optika’s board of directors to determine that the merger with Stellent, as so amended, is at least as favorable to Optika’s stockholders as the third party’s offer.

      A Termination Fee and Expense Reimbursement Will Be Payable Under Certain Circumstances (See page 88.) Optika will be obligated to pay Stellent a termination fee of $1.6 million, plus an amount, not to exceed $750,000, to reimburse Stellent’s expenses relating to the merger, if:

      If the merger agreement is terminated by either party because the other party has materially breached any representation, warranty, covenant or agreement materially adversely affecting (or materially delaying) the consummation of the merger and the breach has not been cured within ten business days following written notice from the terminating party, the terminating party may require the other party to reimburse up to $750,000 of the terminating party’s out-of-pocket expenses incurred in connection with the merger agreement, and the terminating party may seek additional remedies.

      No Solicitation (See page 84.) Optika has agreed not to solicit an acquisition proposal from a third party while the merger is pending. Optika has also agreed not to engage in discussions or negotiations concerning an acquisition proposal unless the Optika board of directors determines that the unsolicited proposal is reasonably likely to be more favorable to Optika’s stockholders than the merger with Stellent and that any required financing is committed or reasonably capable of being obtained by the third party. In

      All shares of Stellent common stock that Optika stockholders receive in connection with the merger will be freely transferable unless the holder is considered an “affiliate” of Optika or Stellent for purposes of the federal securities laws. Shares of Stellent common stock held by these affiliates may be sold only pursuant to a registration statement or an exemption under the Securities Act of 1933.

      Stellent’s shares of common stock are listed and trade on the Nasdaq National Market System. Optika’s shares of common stock are listed and trade on the Nasdaq SmallCap Market System. Stellent trades under the symbol “STEL,” and Optika trades under the symbol “OPTK.” The following table presents the last reported sale price for Stellent common stock and for Optika common stock on January 9, 2004, the last trading day before our announcement of the signing of the merger agreement, and on April 27, 2004, the last trading day before the printing of this document. The table also sets forth the value of the merger consideration Optika stockholders would have received for one share of Optika common stock and Optika preferred stock assuming the merger had taken place on those dates.

      Past price performance is not necessarily indicative of future price performance. You should obtain current market quotations for shares of Optika and Stellent common stock.

      Neither Stellent nor Optika has ever paid cash dividends to its shareholders. Stellent does not anticipate paying cash dividends for the foreseeable future.

STELLENT, INC.

SUMMARY SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA

      The tables below present summary selected historical consolidated financial data of Stellent. You should read the information set forth below in conjunction with the consolidated financial statements (including the notes thereto) and management’s discussion and analysis of financial condition and results of operations in Stellent’s annual report on Form 10-K for the fiscal year ended March 31, 2003 and Stellent’s quarterly report on Form 10-Q for the nine months ended December 31, 2003, which are incorporated by reference into this joint proxy statement/ prospectus. Please refer to the section of this joint proxy statement/ prospectus entitled “Where You Can Find More Information,” beginning on page 112.

      The selected historical consolidated statement of operations data for the nine months ended December 31, 2003 and 2002 and the selected historical consolidated balance sheet data as of December 31, 2003 are derived from the unaudited condensed consolidated financial statements of Stellent contained in Stellent’s quarterly report on Form 10-Q for the period ended December 31, 2003, which is incorporated by reference into this joint proxy statement/ prospectus. The selected historical consolidated balance sheet data as of December 31, 2002 is derived from the unaudited condensed consolidated financial statements of Stellent contained in Stellent’s quarterly report on Form 10-Q for the period ended December 31, 2002, which is not included in or incorporated by reference into this joint proxy statement/ prospectus.

      The unaudited historical consolidated results of operations data for the nine months ended December 31, 2003 are not necessarily indicative of the results to be expected for any other interim period or for the fiscal year ending March 31, 2004 as a whole. However, in the opinion of Stellent’s management, the historical financial data presented reflects all adjustments, consisting only of normal recurring adjustments, necessary for the fair presentation of the financial condition at such date and the results of operations for such period. The historical financial data may not be indicative of Stellent’s future performance.

      The selected historical consolidated statement of operations data for the fiscal years ended March 31, 2003, 2002 and 2001 and the selected historical consolidated balance sheet data as of March 31, 2003 and 2002 are derived from the audited consolidated financial statements of Stellent contained in Stellent’s consolidated financial statements and the related notes thereto, which are incorporated by reference in this joint proxy statement/ prospectus. The selected historical consolidated statement of operations data for the years ended March 31, 2000 and 1999 and the selected historical consolidated balance sheet data as of March 31, 2001, 2000, and 1999 are derived from audited financial statements that are not included in, or incorporated by reference into, this joint proxy statement/ prospectus.

OPTIKA INC.

SUMMARY SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA

      The tables below present summary selected historical consolidated financial data of Optika. You should read the information set forth below in conjunction with the consolidated financial statements (including the notes thereto) and management’s discussion and analysis of financial condition and results of operations in Optika’s annual report on Form 10-K for the fiscal year ended December 31, 2003, which is incorporated by reference into this joint proxy statement/ prospectus and attached as Annex H.

      The selected historical consolidated statement of operations data for the years ended December 31, 2003, 2002 and 2001 and the selected historical consolidated balance sheet data as of December 31, 2003 and 2002 are derived from the audited consolidated financial statements of Optika contained in Optika’s consolidated financial statements, and the related notes thereto, that are incorporated by reference in this joint proxy statement/ prospectus and attached as Annex H. The selected historical consolidated statement of operations data for the years ended December 31, 2000 and 1999 and the selected historical consolidated balance sheet data as of December 31, 2001, 2000 and 1999 are derived from audited financial statements that are not included in, or incorporated by reference into, this joint proxy statement/ prospectus. The historical financial data may not be indicative of Optika’s future performance.