<PAGE>
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 4 OMB APPROVAL
-----------------------------
[_] Check this box if no longer OMB NUMBER: 3235-0287
subject to Section 16. Form 4 Expires: September 30, 1998
or Form 5 obligations may Estimated average burden
continue. See Instruction 1(b). hours per response ...... 0.5
(Print or Type Responses) -----------------------------
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934,
Section 17(a) of the Public Utility Holding Company Act of 1935 or
Section 30(f) of the Investment Company Act of 1940
1. Name and Address of Reporting Person*
Kirk Randall J.
--------------------------------------------------------------------------------
(Last) (First) (Middle)
The Governor Tyler
1902 Downey Street
--------------------------------------------------------------------------------
(Street)
Radford, Virginia 24141
--------------------------------------------------------------------------------
(City) (State) (Zip)
--------------------------------------------------------------------------------
2. Issuer Name and Ticker or Trading Symbol
Novitron International, Inc. (NASDAQ - "NOVI")
--------------------------------------------------------------------------------
3. IRS or Social Security Number of Reporting Person (Voluntary)
--------------------------------------------------------------------------------
4. Statement for Month/Year
May 2000
--------------------------------------------------------------------------------
5. If Amendment, Date of Original (Month/Year)
--------------------------------------------------------------------------------
6. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
----- ------
Officer (give Other (Specify
----- title below) ------ below)
7. Individual or Joint/Group Filing (Check Applicable
Line)
X Form filed by One Reporting Person
---------
Form filed by More than One Reporting Person
---------
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>
Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security 2. Trans- 3. Trans- 4. Securities Acquired (A) 5. Amount of 6. Ownership 7. Nature
(Instr. 3) action action or Disposed of (D) Securities Form: of Indirect
Date Code (Instr. 3, 4 and 5) Beneficially Direct Beneficial
(Instr. 8) Owned at (D) or Ownership
(Month/ ------------ -------------------------- End of Month Indirect (Instr. 4)
Day/ Code V Amount (A) or Price (Instr. 3 (I)
Year) (D) and 4) (Instr. 4)
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C>
Common Stock, $.01 par value
per share 5/2/00 P 900 A $3.00 I (1)
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
Common Stock, $.01 par value
per share 5/5/00 P 1,200 A $3.00 I (2)
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
Common Stock, $.01 par value
per share 5/11/00 P 500 A $3.00 I (2)
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
Common Stock, $.01 par value
per share 5/16/00 P 1,300 A $3.00 401,133 I (2)
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
-------------------------- ---------- ------ ---- -------- ------ ------ -------------- ------------ -------------
</TABLE>
Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly.
* If the form is filed by more than one reporting person, see
Instruction 4(b)(v)
(Over)
SEC 1474 (7-96)
<PAGE>
FORM 4 (continued)
<TABLE>
<CAPTION>
Table II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security 2. Conversion 3. Transaction 4. Transacation 5. Number of Derivative 6. Date Exercisable
(Instr. 3) or Exercise Date Code Securities Acquired (A) and Expiration
Price of (Month/Day/ (Instr. 8) or Disposed of (D) Date
Derivative Year) (Instr. 3, 4, and 5) (Month/Day/
Security Year)
--------------- -------------------------- -------------------
Code V (A) (D) Date Expiration
Exer- Date
cisable
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
None
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
------------------------------- -------------- -------------- -------- ----- --------------- ---------- -------- ----------
</TABLE>
<TABLE>
<CAPTION>
7. Title and Amount of 8. Price of Derivative 9. Number of Derivative 10. Ownership Form 11. Nature of Indirect
Underlying Securities Security (Instr. 5) Securities Beneficially of Derivative Security: Beneficial Ownership
(Instr. 3 and 4) Owned at End of Month Direct (D) or (Instr. 4)
(Instr. 4) Indirect (I) (Instr. 4)
------------------------
Title Amount or
Number of
Shares
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
<S> <C> <C> <C> <C>
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
------------------------ ---------------------- -------------------------- --------------------------- ------------------------
</TABLE>
Explanation of Responses:
(1) These shares are directly owned by Clinical Chemistry Holdings, Inc.
("CCH"). These shares may be deemed to be indirectly beneficially owned (as
defined under Rule 13d-3 promulgated under the Securities Exchange Act of
1934, as amended) by Randal J. Kirk who, as a result of his position with
and ownership of securities of CCH, could be deemed to have voting power
and/or investment power with respect to the securities directly beneficially
owned by CCH.
(2) These shares are directly owned by Kirkfield, L.L.C. ("Kirkfield"). These
shares may be deemed to be indirectly beneficially owned (as defined under
Rule 13d-3 promulgated under the Securities Exchange Act of 1934, as
amended) by Randal J. Kirk who, as a result of his position with Kirkfield,
could be deemed to have voting power and/or investment power with respect to
the securities directly beneficially owned by Kirkfield.
**Intentional misstatements or omissions of facts constitute Federal Criminal
Violations.
See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
/s/ Randal J. Kirk 6/9/00
------------------------ --------
**Randal J. Kirk Date
Note: File three copies of this Form, one of which must be manually signed. If
space is insufficient, see Instruction 6 for procedure.
Potential persons who are to respond to the collection of information contained
in this form are not required to respond unless the form displays a currently
valid OMB Number
Page 2
SEC 1474 (7-96)
