United States
Securities and Exchange Commission
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 4)
Name of Issuer: Marcum Natural Gas Services, Inc.
Title of Class of Securities: Common Stock
CUSIP Number: 566323101
CUSIP No. 566323101 Page 2 of 4 Pages
1. Name of Reporting Person Alphi Investment Management Company
IRS No. 36-3588013
2. Check the appropriate box if a member of a group
3. SEC Use Only
4. Citizenship or Place of Organization Illinois
5. Sole Voting Power 615,400
6. Shared Voting Power 0
7. Sole Dispositive Power 615,400
8. Shared Dispositive Power 0
9. Aggregate Amount Beneficially Owned by Each Reporting Person 615,400
10. Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares
11. Percent of Class Represented by Amount in Row 9 4.9%
12. Type of Reporting Person CO
CUSIP No. 566323101 Page 3 of 4 Pages
Item 1(a). Name of Issuer
This Amendment No. 4 to the Schedule 13G relates to the Shares of Common
Stock of Marcum Natural Gas Services, Inc. (the "Shares" and the "Company"
respectively).
Item 1(b). Address of Issuer's Principal Executive Offices
The executive offices of the Company are located at 1675 Broadway,
Suite 2200, Denver, Colorado 80202.
Item 2(a). Name of Person Filing
This Amendment No. 4 to the Schedule 13G is being filed on behalf of Alphi
Investment Management Company ("AIMCO"), an Illinois corporation.
Item 2(b). Address of Principal Business Office
The principal business offices of AIMCO are located at 155 Pfingsten Road,
Suite 360, Deerfield, IL 60015.
Item 2(c). Citizenship
U.S.A.
Item 2(d). Title of Class of Securities
Common Stock
Item 2(e). CUSIP Number
566323101
Item 3. Type of Person
Corporation, passive investor
Item 4. Ownership
(a) Amount Beneficially Owned: 615,400
(b) Percent of Class: 4.9%
(c) Number of shares as to which person has:
(I) sole power to vote or to direct the vote: 615,400
(2) shared power to vote or to direct the vote: 0
(3) sole power to dispose or to direct the disposition of: 615,400
(4) shared power to dispose or to direct the disposition of: 0
CUSIP No. 566323101 Page 4 of 4 Pages
Item 5. Ownership of Five Percent or less of a Class
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.
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 acquired in
the ordinary course of business and were not acquired for the
purpose of and do not have the effect of changing or influencing
the control of the issuer of such securities and were not acquired
in connection with or as a participant in any transaction having
such 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.
April 7, 1998
Date
Philip R. Smith
Signature
Philip R. Smith/Secretary
Name/Title
