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<TITLE>LabOne, Inc. Form 8-K dated April 20, 2005</TITLE>
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<FONT SIZE=5><STRONG><P ALIGN="CENTER">UNITED STATES SECURITIES AND EXCHANGE COMMISSION</P>
</FONT></STRONG><FONT SIZE=4><P ALIGN="CENTER">Washington, D.C. 20549</P>
</FONT><FONT SIZE=5><STRONG><P ALIGN="CENTER">FORM 8-K</P>
</FONT></STRONG><P ALIGN="CENTER">CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934</P>
<P ALIGN="CENTER">Date of Report: <U>April 20, 2005</P>
</U><P ALIGN="CENTER">Commission file number: 0-16946</P>
<B><U><FONT FACE="Times,Times New Roman" SIZE=5><P ALIGN="CENTER">LabOne, Inc.</P>
</B></U></FONT><P ALIGN="CENTER">10101 Renner Blvd.</P>
<P ALIGN="CENTER">Lenexa, Kansas 66219</P>
<P ALIGN="CENTER">(913) 888-1770</P>
<FONT FACE="Times,Times New Roman"><P ALIGN="CENTER">Incorporated in Missouri</P>
<P ALIGN="CENTER">I.R.S. Employer Identification Number: 43-1039532</P>
</FONT><FONT FACE="Times,Times New Roman" SIZE=2><P>&nbsp;</P>
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<B><P>Item 1.01  Entry into a Material Definitive Agreement</P></B>

<P>On April 20, 2005, LabOne, Inc. and American Stock Transfer and Trust Company amended the parties' February 11, 2000 Rights Agreement, as previously amended on August 31, 2001 ("Rights Agreement").</P>

<P>The Rights Agreement grants Company shareholders the right to purchase Company common stock for one-half of the stock's market price if a person becomes the beneficial owner of fifteen percent (15%) or more of the Company's outstanding common stock ("Acquiring Person"), subject to the terms and conditions of the Rights Agreement.  Prior to this amendment, the Rights Agreement exempted parties affiliated with Welsh, Carson, Anderson & Stowe and family members of W. T. Grant from the definition of "Acquiring Person," even if such parties acquired fifteen percent (15%) or more of the Company's common stock.</P>

<P>This amendment removes the exemptions pertaining to Welsh, Carson, Anderson & Stowe and the family members of W.T. Grant from the Rights Agreement's definition of "Acquiring Person."  Thus, subject to the terms and conditions of the Rights Agreement, such parties' acquisition of fifteen percent (15%) or more of the Company's common stock would trigger the rights specified in the Rights Agreement on the same basis as other non-exempt acquirers.</P>

<P>This summary is qualified in its entirety by the text of the amendment to the Rights Agreement, which is attached hereto as Exhibit 4.1.</P>


<P>&nbsp;&nbsp;</P>
<B><P>Item 9.01  Financial Statements and Exhibits</P>
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<P>  (c)  Exhibits  </P>
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<P>  4.1    Amendment No. 2 to the Rights Agreement</P>


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<I><FONT SIZE=5><P ALIGN="CENTER">Signatures</I></FONT><FONT FACE="Times,Times New Roman"> </P>
<P ALIGN="CENTER">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.</P>

<P ALIGN="CENTER">&nbsp;</FONT><FONT SIZE=5>LabOne, Inc.</P>
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      <P>Date:&nbsp;&nbsp;April 25, 2005</P></TD>
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      <P>By <U>/s/ <I>John W. McCarty</I></U><BR>John W. McCarty
      <BR>Executive V.P. and Chief Financial Officer
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{"company-data": {"conformed-name": "LABONE INC/", "cik": "0000830158", "assigned-sic": "8071", "irs-number": "431039532", "state-of-incorporation": "MO", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-92137", "film-number": "05770192"}, "business-address": {"street1": "10101 RENNER BLVD", "street2": "P. O. BOX 7568", "city": "LENEXA", "state": "KS", "zip": "66219", "phone": "9138881770"}, "mail-address": {"street1": "10101 RENNER BLVD", "street2": "X", "city": "LENEXA", "state": "KS", "zip": "66219"}, "former-company": [{"former-conformed-name": "LAB HOLDINGS INC", "date-changed": "19980406"}, {"former-conformed-name": "SEAFIELD CAPITAL CORP", "date-changed": "19920703"}, {"former-conformed-name": "SEAFIELD CAPTIAL CORP", "date-changed": "19910520"}]}
LabOne, Inc. Form 8-K dated April 20, 2005
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Date of Report:
April 20, 2005
Commission file number: 0-16946
LabOne, Inc.
10101 Renner Blvd.
Lenexa, Kansas 66219
(913) 888-1770
Incorporated in Missouri
I.R.S. Employer Identification Number: 43-1039532
Item 1.01  Entry into a Material Definitive Agreement
On April 20, 2005, LabOne, Inc. and American Stock Transfer and Trust Company amended the parties' February 11, 2000 Rights Agreement, as previously amended on August 31, 2001 ("Rights Agreement").
The Rights Agreement grants Company shareholders the right to purchase Company common stock for one-half of the stock's market price if a person becomes the beneficial owner of fifteen percent (15%) or more of the Company's outstanding common stock ("Acquiring Person"), subject to the terms and conditions of the Rights Agreement.  Prior to this amendment, the Rights Agreement exempted parties affiliated with Welsh, Carson, Anderson & Stowe and family members of W. T. Grant from the definition of "Acquiring Person," even if such parties acquired fifteen percent (15%) or more of the Company's common stock.
This amendment removes the exemptions pertaining to Welsh, Carson, Anderson & Stowe and the family members of W.T. Grant from the Rights Agreement's definition of "Acquiring Person."  Thus, subject to the terms and conditions of the Rights Agreement, such parties' acquisition of fifteen percent (15%) or more of the Company's common stock would trigger the rights specified in the Rights Agreement on the same basis as other non-exempt acquirers.
This summary is qualified in its entirety by the text of the amendment to the Rights Agreement, which is attached hereto as Exhibit 4.1.
Item 9.01  Financial Statements and Exhibits
(c)  Exhibits
4.1    Amendment No. 2 to the Rights Agreement
Signatures
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
LabOne, Inc.
Date:  April 25, 2005
By
/s/
John W. McCarty
John W. McCarty
Executive V.P. and Chief Financial Officer