- Securities Registration (section 12(g)) (8-A12G)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

PURSUANT TO SECTION 12(b) OR (g) OF THE

SECURITIES EXCHANGE ACT OF 1934

HEMAGEN DIAGNOSTICS, INC.

(Exact name of Registrant as specified in its Charter)

Delaware	1-11700	04-2869857
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No. )
9033 Red Branch Road, Columbia, MD
		21045
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code (410) 740-3198

Securities to be registered pursuant to Section 12(b) of the Act: None

Title of each class to be so registered	Name of each exchange on which each class is to be registered
N/A	N/A

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), check the following box. o

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d), check the following box. x

Securities Act registration statement file number to which this form relates: N/A

Securities to be registered pursuant to Section 12(g) of the Act:

Common Share Purchase Rights Pursuant to Rights Agreement

(Title of Class)

Item 1. Description of Registrant’s Securities to be Registered

Effective April 29, 2010, the Board of Directors of Hemagen Diagnostics, Inc. (the “ Company ”) declared a dividend distribution of one Common Stock Purchase Right (a “ Right ”) for each outstanding share of Common Stock of the Company (the “ Company Common Stock ”) to stockholders of record as of the close of business on April 29, 2010 (the “ Record Date ”). The Rights will also attach to new shares of Common Stock issued after the Record Date. Each Right entitles the registered holder thereof to purchase from the Company one share (a “ Unit ”) of Common Stock of the Company at a cash exercise price of $0.15 per share (the “ Exercise Price ”), subject to adjustment, under certain conditions specified in a Rights Agreement dated as of April 29, 2010 (the “ Rights Agreement ”) between the Company and Continental Stock Transfer & Trust Company (the “ Rights Agent ”) and summarized below. The full description and terms of the Rights are set forth in the Rights Agreement.

Distribution Date

Initially, the Rights will be attached to the certificates representing outstanding shares of Company Common Stock, and no separate Rights certificates will be distributed. The Rights are not exercisable until the Distribution Date (as defined below) and will expire at the close of business on April 29, 2020 (the " Final Expiration Date "), unless earlier redeemed by the Company as described below. Until the Distribution Date, (i) the Rights will be evidenced by and will be transferred with and only with such Company Common Stock certificates, (ii) new Common Stock certificates issued after April 29, 2010, will contain a legend incorporating the Rights Agreement by reference, and (iii) the surrender for transfer of any certificate for Company Common Stock will also constitute the transfer of the Rights associated with the Company Common Stock represented by such certificate. As promptly as reasonably practicable after the Distribution Date, Rights certificates will be mailed to holders of record of the Company Common Stock as of the close of business on the Distribution Date, and thereafter, the separate Rights certificates alone will represent the Rights. Except as otherwise determined by the Board of Directors, the only Company Common Stock that will be issued with Rights is Company Common Stock issued prior to the earliest of (i) the Distribution Date, and (ii) the Expiration Date.

The Rights will separate from the Company Common Stock and the " Distribution Date " will occur upon the earlier of (i) ten (10) business days following a public announcement that a person or group of affiliated or associated persons (an " Acquiring Person ") has acquired, obtained the right to acquire, or otherwise obtained beneficial ownership of ten percent (10%) or more of the outstanding shares of Company Common Stock (or an earlier date under certain circumstances specified in the Rights Agreement) (the " Stock Acquisition Date "), and (ii) ten (10) business days following the commencement of a tender offer or exchange offer that would result in a person or group beneficially owning ten percent (10%) or more of the outstanding Company Common Stock. The Continuing Directors (defined as the directors who are not affiliated or associated with an Acquiring Person) may vote to extend these timeframes in their discretion. In the event that (i) an Acquiring Person becomes the beneficial owner of ten percent (10%) or more of the then outstanding shares of Company Common Stock, (ii) the Company is the surviving corporation in a merger with an Acquiring Person and shares of Company Common Stock shall remain outstanding, (iii) an Acquiring Person engages in one or more "self-dealing" transactions as set forth in the Rights Agreement, (iv) the Company takes steps to liquidate or dissolve, or (v) during such time as there is an Acquiring Person, an event occurs which results in such Acquiring Person's ownership interest being increased by more than one percent (1%) (e.g., by means of a reverse stock split or recapitalization), then, in each such case, each holder of a Right will thereafter have the right to acquire, upon exercise of such Right, up to that number of shares of Common Stock (or, in certain circumstances, cash, property or other securities of the Company) having a value equal to two times (2x) the exercise price of the Right. The exercise price is the Purchase Price multiplied by the number of Units of Company Common Stock issuable upon exercise of a Right prior to the events described in this paragraph. Notwithstanding any of the foregoing, following the occurrence of any of the events set forth in this paragraph, all Rights that are, or (under certain circumstances specified in the Rights Agreement) were, beneficially owned by any Acquiring Person will be null and void.

Subscription Rights

The Purchase Price and the number of Units of the Company Common Stock issuable upon exercise of the Rights are subject to adjustment from time to time to prevent dilution (i) in the event of a stock dividend on, or subdivision, combination or reclassification of, the Company Common Stock, (ii) if holders of the Company Common Stock are granted certain rights or warrants to subscribe for Company Common Stock or convertible securities at less than the Current Market Price of the Company Common Stock, or (iii) upon the distribution to the holders of the Company Common Stock of evidences of indebtedness, cash or assets (excluding regular quarterly cash dividends) or of subscription rights or warrants (other than those referred to above). With certain exceptions, no adjustment in the Purchase Price will be required until cumulative adjustments amount to at least one percent (1%) of the Purchase Price. The Company is not required to issue fractional Units or shares of the Company Common Stock. In lieu thereof, an adjustment in cash may be made based on the market price of the Company Common Stock prior to the date of exercise or exchange.

Until a Right is exercised or exchanged, the holder thereof, as such, will have no rights as a stockholder of the Company, including, without limitation, the right to vote or to receive dividends. While the distribution of the Rights will not be taxable to stockholder or to the Company, stockholders may, depending upon the circumstances, recognize taxable income in the event that the Rights become exercisable or exchangeable for Units or shares of Company Common Stock (or other consideration).

Exchange Feature

At any time after a person becomes an Acquiring Person, but before any person becomes the beneficial owner of fifty percent or more of the Company's Common Stock, the Board of Directors of the Company may exchange the Rights (other than Rights owned by such Acquiring Person or group which become void), in whole or in part, at an exchange ratio of one share of Company Common Stock, per Right (subject to adjustment).

The Rights Agreement excludes from the definition of Acquiring Person certain defined Exempt Person(s) and any Person the Board of Directors determines in good faith (with the concurrence of a majority of Continuing Directors then in office prior to the time of the event causing a Person to become an Acquiring Person) is not, in fact, an Acquiring Person for purposes of the Rights Agreement. William P. Hales and his immediate family members and their affiliates and associates are defined as an Exempt Person.

Adjustments

The Exercise Price payable, and the number of shares of Common Stock or other securities or property issuable, upon exercise of the Rights are subject to adjustment from time to time to prevent dilution (i) in the event of a stock dividend on, or a subdivision, combination or reclassification of, the Common Stock, (ii) if holders of the Common Stock are granted certain rights or warrants to subscribe for Common Stock or convertible securities at less than the current market price of the Common Stock, or (iii) upon the distribution to holders of the Common Stock of evidences of indebtedness or assets (excluding regular quarterly cash dividends) or of subscription rights or warrants (other than those referred to above).

With certain exceptions, no adjustment in the Exercise Price will be required until cumulative adjustments amount to at least 1% of the Exercise Price. The Company is not obligated to issue fractional shares. If the Company elects not to issue fractional shares, in lieu thereof an adjustment in cash will be made based on the fair market value of the Common Stock on the last trading date prior to the date of exercise.

Redemption

The Rights may be redeemed in whole, but not in part, at a price of $0.0000001 per Right (payable in cash, Common Stock or other consideration deemed appropriate by the Board of Directors) by the Board of Directors only until the earlier of (i) the close of business on the tenth (10 th ) business day after the Stock Acquisition Date or such later date as may be determined by action of a majority of Continuing Directors (as defined in the Rights Agreement) then in office prior to such time at which any person becomes an Acquiring Person; or (ii) the expiration date of the Rights Agreement. Immediately upon the action of the Board of Directors ordering redemption of the Rights, the Rights will terminate and, thereafter, the only right of the holders of Rights will be to receive the redemption price.

Amendment

Any provision in the Rights Agreement may be amended by the Board of Directors prior to the Distribution Date. After the Distribution Date, the provisions of the Rights Agreement may be amended by the Board of Directors in order to cure any ambiguity, make corrections, lengthen or shorten time periods (which lengthening or shortening, following the first time a person becomes an Acquiring Person, shall be effective only if there are Continuing Directors and shall require the concurrence of a majority of such Continuing Directors) and to otherwise make changes which do not adversely affect the interests of holders of Rights (excluding the interests of any Acquiring Person); provided, however, that no amendment to adjust the time period governing redemption may be made at such time as the Rights are not redeemable or to lengthen any time period unless for the purpose of protecting or enhancing the rights or benefits of the holders of the Rights.

Expiration Date

The Rights are not exercisable until the Distribution Date and will expire at the close of business on the Final Expiration Date, unless previously redeemed or exchanged by the Company.

Miscellaneous

The form of Right Certificate is attached as Exhibit A to the Rights Agreement. The foregoing description of the Rights does not purport to be complete and is qualified in its entirety by reference to the Rights Agreement, which is attached as an exhibit to this Registration Statement of Form 8-A.

Item 2 - Exhibits

Exhibit No.	Description
4.1	Stockholder Rights Agreement, dated as of April 29, 2010 between Hemagen Diagnostics, Inc. and Continental Stock Transfer & Trust Company, LLC

SIGNATURES

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the Registrant has duly caused this registration statement to be signed on its behalf by the undersigned hereunto duly authorized.