UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
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SCHEDULE 13G/A
Amendment No. 1
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Information to be included in statements filed pursuant
to Rules 13d-1(b), (c) and (d) and amendments thereto filed
pursuant to Rule 13d-2(b)
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LUMINEX CORPORATION
(Name of Issuer)
Common Stock
(Title of Class of Securities)
55027E 10 2
(Cusip Number)
December 31, 2001
(Date of Event Which Requires Filing of this Statement)
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Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[ ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[X] Rule 13d-1(d)
The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
Page 1 of 5 Pages
CUSIP No. 55027E 10 2 SCHEDULE 13G
(cover page continued)
1. NAME OF REPORTING PERSON
Mark B. Chandler
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
(A) [ ]
(B) [ ]
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION
United States
5. SOLE VOTING POWER
300,000
NUMBER OF
SHARES 6. SHARED VOTING POWER
BENEFICIALLY
OWNED BY 3,604,255
EACH
REPORTING PERSON 7. SOLE DISPOSITIVE POWER
300,000
8. SHARED DISPOSITIVE POWER
3,604,255
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,904,255
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [X]
100,000 shares are held by Mrs. Chandler as trustee in a trust
for her benefit and 200,000 shares held by Mrs. Chandler as
her separate property.
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
13.6 %
12. TYPE OF REPORTING PERSON
IN
Page 2 of 5 Pages
SCHEDULE 13G
ITEM 1(A). NAME OF ISSUER: Luminex Corporation
ITEM 1(B). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
12212 Technology Blvd., Austin, Texas 78727
ITEM 2(A). NAME OF PERSON FILING: Mark B. Chandler, Ph.D.
ITEM 2(B). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
12212 Technology Blvd., Austin, Texas 78727
ITEM 2(C). CITIZENSHIP: United States (Texas)
ITEM 2(D). TITLE OF CLASS OR SECURITIES: Common Stock, $0.001 par value
ITEM 2(E). CUSIP NUMBER: 55027E 10 2
ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B) OR
13D-2(B),
(A) [ ] BROKER OR DEALER REGISTERED UNDER THE ACT
(B) [ ] BANK AS DEFINED IN SECTION 3 (A) (6) OF THE ACT
(C) [ ] INSURANCE COMPANY AS DEFINED IN SECTION 3 (A) (19) OF
THE ACT
(D) [ ] INVESTMENT COMPANY REGISTERED UNDER SECTION 8 OF THE
INVESTMENT COMPANY ACT
(E) [ ] INVESTMENT ADVISER REGISTERED UNDER SECTION 203 OF THE
INVESTMENT ADVISERS ACT OF 1940
(F) [ ] EMPLOYEE BENEFIT PLAN, PENSION FUND WHICH IS SUBJECT
TO THE PROVISIONS OF THE EMPLOYEE RETIREMENT INCOME
SECURITY ACT OF 1974 OR ENDOWMENT FUND; SEE SECTION
240.13D- (B) (1) (II) (F)
(G) [ ] PARENT HOLDING COMPANY, IN ACCORDANCE WITH SECTION
240.13D-1 (B) (II) (G); SEE ITEM 7
(H) [ ] GROUP, IN ACCORDANCE WITH SECTION 240.13D-1 (B) (1)
(II) (H)
ITEM 4. OWNERSHIP:
(A) AMOUNT BENEFICIALLY OWNED: 3,904,255 shares of which
150,000 shares are owned
directly, 3,133,702 shares owned
jointly, 100,000 shares are held
in trust for the benefit of Dr.
Chandler of which Dr. Chandler
is the Trustee, 50,000 shares
are held in trust for the
benefit of his daughter of which
Dr. Chandler is the Trustee and
470,553 shares of Common Stock
subject to vested and
immediately exercisable stock
options.
(B) PERCENT OF CLASS: 13.6 %
Page 3 of 5 Pages
SCHEDULE 13G
(C) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:
(I) SOLE POWER TO VOTE OR TO DIRECT THE VOTE:
300,000
(II) SHARED POWER TO VOTE OR TO DIRECT THE VOTE:
3,604,255
(III) SOLE POWER TO DISPOSE OR TO DIRECT THE DISPOSITION
OF:
300,000
(IV) SHARED POWER TO DISPOSE OR TO DIRECT THE DISPOSITION
OF:
3,604,255
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 [ ].
Not applicable.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
Not applicable.
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
COMPANY.
Not applicable.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
Not applicable.
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.
Page 4 of 5 Pages
SCHEDULE 13G
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.
/s/ Mark B. Chandler
-----------------------------------------
Mark B. Chandler
Date: 7 February 2002
Page 5 of 5 Pages