SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ------------------------------------ SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 AROC INC. (Name of Issuer) Common Stock, $.01 par value (Title of Class of Securities) 02932810 (CUSIP Number) December 7, 1999 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1(b) [X] Rule 13d-1(c) [ ] Rule 13d-1(d) CUSIP NO. 1 Name of Reporting Person: Bank of America Corporation I.R.S. Identification Number of Above Person: 560906609 2 Check the Appropriate Box if a Member of a Group (a) [ ] (b) [ ] 3 SEC Use Only 4 Citizenship or Place of Organization Delaware Number of Shares Beneficially 5 Sole Voting Power 0 6 Shared Voting Power 7,179,519 Owned by Each Reporting 7 Sole Dispositive Power 0 8 Shared Dispositive Power 7,179,519 Person With 9 Aggregate Amount Beneficially Owned by each Reporting Person 7,179,519 10 Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ] 11 Percent of Class Represented by Amount in Row (9) 12.1% 12 Type of Reporting Person HC
Page 2 CUSIP NO. 1 Name of Reporting Person: LaSalle Street Natural Resources Corporation I.R.S. Identification Number of Above Person: 363931868 2 Check the Appropriate Box if a Member of a Group (a) [ ] (b) [ ] 3 SEC Use Only 4 Citizenship or Place of Organization Delaware Number of Shares Beneficially 5 Sole Voting Power 0 6 Shared Voting Power 7,179,519 Owned by Each Reporting 7 Sole Dispositive Power 0 8 Shared Dispositive Power 7,179,519 Person With 9 Aggregate Amount Beneficially Owned by each Reporting Person 7,179,519 10 Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ] 11 Percent of Class Represented by Amount in Row (9) 12.1% 12 Type of Reporting Person CO
Page 3 ITEM 1(A). NAME OF ISSUER. AROC Inc. ITEM 1(B). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES. 4200 East Skelly Drive, Suite 1000 Tulsa, Oklahoma 74135 ITEM 2(A) . NAMES OF PERSON(S) FILING. Bank of America Corporation LaSalle Street Natural Resources Corporation ITEM 2(B). ADDRESS OR PRINCIPAL BUSINESS OFFICES. Bank of America Corporation 100 North Tryon Street Charlotte, North Carolina 28255 LaSalle Street Natural Resources Corporation 333 Clay Street, Suite 4550 Houston, Texas 77002 ITEM 2(C). CITIZENSHIP. Bank of America Corporation - Delaware LaSalle Street Natural Resources Corporation - Delaware ITEM 2(D). TITLE OF CLASS OF SECURITIES. Common Stock, $.01 par value ITEM 2(E). CUSIP NUMBER. 02932810 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A: (a) [ ] Broker or dealer registered under Section 16 of the Exchange Act. (b) [ ] Bank as defined in Section 3(a)(6) of the Exchange Act. (c) [ ] Insurance company as defined in Section 3(a)(19) of the Exchange Act. (d) [ ] Investment company registered under Section 8 of the Investment Company Act. (e) [ ] An Investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); (f) [ ] An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F); (g) [ ] A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G); (h) [ ] A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; (i) [ ] A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act; (j) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J). If this statement is filed pursuant to Rule 13d-1(c), check this box. [X] Page 4 ITEM 4. OWNERSHIP. With respect to the beneficial ownership of each reporting person, see Items 5 through 8 of the cover pages to this Schedule 13G applicable to each such person (pp. 2-3), which are incorporated herein by reference. ITEM5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS. Not Applicable. ITEM6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON. Not Applicable. ITEM 7. IDENTIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY. LaSalle Street Natural Resources Corporation 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. EXHIBIT A: Joint Filing Agreement among the parties regarding filing of Schedule 13G. Page 5 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. December 21, 1999 Bank of America Corporation: By: /s/ Peter J. Brown ------------------------------- Peter J. Brown Authorized Representative [Signature Page- Schedule 13G] SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. December 21, 1999 LaSalle Street Natural Resources Corporation: By: /s/ Douglas I. Robinson ----------------------------------------- Douglas I. Robinson President [Signature Page- Schedule 13G]