-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, KY08ahZ+N+pyYs63ipeDW5ULuDO+PuQ1aEMq+qa1cQFlglu/81Vs4Z2PRJ7e8LJi Sium8E1mhCt0EinOYxm6QQ== 0001144204-05-030509.txt : 20050930 0001144204-05-030509.hdr.sgml : 20050930 20050930164211 ACCESSION NUMBER: 0001144204-05-030509 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20050930 DATE AS OF CHANGE: 20050930 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: MCDATA CORP CENTRAL INDEX KEY: 0000731502 STANDARD INDUSTRIAL CLASSIFICATION: COMMUNICATIONS EQUIPMENT, NEC [3669] IRS NUMBER: 841421844 STATE OF INCORPORATION: DE FISCAL YEAR END: 0131 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-60177 FILM NUMBER: 051114684 BUSINESS ADDRESS: STREET 1: 380 INTERLOCKEN CRESCENT CITY: BROOMFIELD STATE: CO ZIP: 80021 BUSINESS PHONE: 3034609200 MAIL ADDRESS: STREET 1: 380 INTERLOCKEN CRESCENT CITY: BROOMFIELD STATE: CO ZIP: 80021 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: Black River Asset Management LLC CENTRAL INDEX KEY: 0001303241 IRS NUMBER: 412066451 STATE OF INCORPORATION: DE FISCAL YEAR END: 0531 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 12700 WHITEWATER DRIVE CITY: MINNETONKA STATE: MN ZIP: 55343 BUSINESS PHONE: 952-984-3557 MAIL ADDRESS: STREET 1: 12700 WHITEWATER DRIVE CITY: MINNETONKA STATE: MN ZIP: 55343 SC 13G 1 v026591.txt =============================== OMB APPROVAL =============================== OMB Number: 3235-0145 =============================== Expires: December 31, 2005 =============================== Estimated average burden hours per response. . . 11 =============================== UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* McData Corporation ================================================================================ (Name of Issuer) Class A Common Stock ================================================================================ (Title of Class of Securities) 580031201 ================================================================================ (CUSIP Number) September 21, 2005 ================================================================================ (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |_| Rule 13d-1(b) |X| Rule 13d-1(c) |_| Rule 13d-1(d) Page 2 of 6 SCHEDULE 13G CUSIP NO. 580031201 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Black River Asset Management LLC I.R.S. Identification No: 41-2066451 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) ................................... (b) .................................... 3. SEC Use Only .................................... Citizenship or Place of Organization 4. Delaware Number of 5. Sole Voting Power: 1,933,096 Shares Beneficially 6. Shared Voting Power: 0 Owned by Each Reporting 7. Sole Dispositive Power: 1,933,096 Person With 8. Shared Dispositive Power: 0 9. Aggregate Amount Beneficially Owned by Each Reporting Person: 1,933,096 10. Shares Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) 11. Percent of Class Represented by Amount in Row (9): 5.4% 12. Type of Reporting Person (See Instructions) CO Page 3 of 6 SCHEDULE 13G CUSIP NO. 580031201 Item 1. (a) Name of Issuer: McData Corporation (b) Address of Issuer's Principal Executive Offices: 380 Interlocken Crescent Broomfield, CO 80021 Item 2. (a) Name of Person Filing: Black River Asset Management LLC. (b) Address of Principal Business Office or, if none, Residence: 12700 Whitewater Drive Minnetonka, MN 55343 (c) Citizenship: Delaware (d) Title of Class of Securities: Class A Common Stock (e) CUSIP Number: 580031201 Item 3. If this statement is filed pursuant to Sections 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: (a) |_| Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o). (b) |_| Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c). (c) |_| Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c). (d) |_| Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8). (e) |_| An investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E); (f) |_| An employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F); (g) |_| A parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G); (h) |_| A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); (i) |_| A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); (j) |_| Group, in accordance with Section 240.13d-1(b)(1)(ii)(J). Page 4 of 6 SCHEDULE 13G CUSIP NO. 580031201 Item 4. Ownership. Provide the following information regarding the aggregate number and percentageof the class of securities of the issuer identified in Item 1. (a) Amount beneficially owned: 1,933,096 (b) Percent of class: 5.4% (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote: 1,933,096 (ii) Shared power to vote or to direct the vote: 0. (iii) Sole power to dispose or to direct the disposition of: 1,933,096 (iv) Shared power to dispose or to direct the disposition of: 0. Item 5. Ownership of Five Percent or Less of a Class If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following. |_| Item 6. Ownership of More than Five Percent on Behalf of Another Person. Not Applicable Page 5 of 6 SCHEDULE 13G CUSIP NO. 580031201 Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person Not Applicable Item 8. Identification and Classification of Members of the Group Not Applicable Item 9. Notice of Dissolution of Group Not Applicable Page 6 of 6 SCHEDULE 13G CUSIP NO. 580031201 Item 10.Certification By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: September 30, 2005 Black River Asset Managemnet LLC /s/ Robert Goedken ----------------------------- Signature Name: Robert Goedken Title: Chief Legal Officer -----END PRIVACY-ENHANCED MESSAGE-----