Title 15 — Commerce and TradeRelease 119-73
§18 Acquisition by one corporation of stock of another
Title 15 › Chapter CHAPTER 1— - MONOPOLIES AND COMBINATIONS IN RESTRAINT OF TRADE › § 18
Summary
People or companies that do business across state lines must not buy, directly or indirectly, any part of another company's stock or assets if that purchase would greatly reduce competition or help create a monopoly in any market or area. This rule also covers using bought stock to control a company by voting, proxies, or other means. Buying stock just for investment is OK if the buyer does not use it to cut competition. A company may form and own subsidiaries for its regular lawful business if that does not hurt competition. Common carriers may help build or own branch or short lines, or buy stock in them, when there is no substantial competition between the lines. The rule does not take away rights already legally owned. It also does not make past illegal acts lawful or remove antitrust penalties. It does not apply to transactions approved by the Secretary of Transportation, the Federal Power Commission, the Surface Transportation Board, the Securities and Exchange Commission under section 79j of this title, the United States Maritime Commission, or the Secretary of Agriculture.
Full Legal Text
Title 15, §18
Commerce and Trade — Source: USLM XML via OLRC
No person engaged in commerce or in any activity affecting commerce shall acquire, directly or indirectly, the whole or any part of the stock or other share capital and no person subject to the jurisdiction of the Federal Trade Commission shall acquire the whole or any part of the assets of another person engaged also in commerce or in any activity affecting commerce, where in any line of commerce or in any activity affecting commerce in any section of the country, the effect of such acquisition may be substantially to lessen competition, or to tend to create a monopoly. No person shall acquire, directly or indirectly, the whole or any part of the stock or other share capital and no person subject to the jurisdiction of the Federal Trade Commission shall acquire the whole or any part of the assets of one or more persons engaged in commerce or in any activity affecting commerce, where in any line of commerce or in any activity affecting commerce in any section of the country, the effect of such acquisition, of such stocks or assets, or of the use of such stock by the voting or granting of proxies or otherwise, may be substantially to lessen competition, or to tend to create a monopoly. This section shall not apply to persons purchasing such stock solely for investment and not using the same by voting or otherwise to bring about, or in attempting to bring about, the substantial lessening of competition. Nor shall anything contained in this section prevent a corporation engaged in commerce or in any activity affecting commerce from causing the formation of subsidiary corporations for the actual carrying on of their immediate lawful business, or the natural and legitimate branches or extensions thereof, or from owning and holding all or a part of the stock of such subsidiary corporations, when the effect of such formation is not to substantially lessen competition. Nor shall anything herein contained be construed to prohibit any common carrier subject to the laws to regulate commerce from aiding in the construction of branches or short lines so located as to become feeders to the main line of the company so aiding in such construction or from acquiring or owning all or any part of the stock of such branch lines, nor to prevent any such common carrier from acquiring and owning all or any part of the stock of a branch or short line constructed by an independent company where there is no substantial competition between the company owning the branch line so constructed and the company owning the main line acquiring the property or an interest therein, nor to prevent such common carrier from extending any of its lines through the medium of the acquisition of stock or otherwise of any other common carrier where there is no substantial competition between the company extending its lines and the company whose stock, property, or an interest therein is so acquired. Nothing contained in this section shall be held to affect or impair any right heretofore legally acquired: Provided, That nothing in this section shall be held or construed to authorize or make lawful anything heretofore prohibited or made illegal by the antitrust laws, nor to exempt any person from the penal provisions thereof or the civil remedies therein provided. Nothing contained in this section shall apply to transactions duly consummated pursuant to authority given by the Secretary of Transportation, Federal Power Commission, Surface Transportation Board, the Securities and Exchange Commission in the exercise of its jurisdiction under section 79j of this title,11 See References in Text note below. the United States Maritime Commission, or the Secretary of Agriculture under any statutory provision vesting such power in such Commission, Board, or Secretary.
Legislative History
Notes & Related Subsidiaries
Editorial Notes
References in Text
section 79j of this title, referred to in text, was repealed by Pub. L. 109–58, title XII, § 1263, Aug. 8, 2005, 119 Stat. 974.
Amendments
1996—Pub. L. 104–104, in sixth par., struck out “Federal Communications Commission,” after “Secretary of Transportation,”. 1995—Pub. L. 104–88, in sixth par., substituted “Surface Transportation Board” for “Interstate Commerce Commission” and inserted “, Board,” after “vesting such power in such Commission”. 1984—Pub. L. 98–443 substituted “Secretary of Transportation” for “Civil Aeronautics Board” and “Commission or Secretary” for “Commission, Secretary, or Board” in sixth par. 1980—Pub. L. 96–349, substituted “person” for “corporation” wherever appearing in first and second pars.; substituted “persons” for “corporations” in second par. and first sentence of third par.; and inserted “or in any activity affecting commerce” after “commerce” wherever appearing in first, second, and third pars. 1950—Act Dec. 29, 1950, amended section generally so as to prohibit the acquisition of the whole or any part of the assets of another corporation when the effect of the acquisition may substantially lessen competition or tend to create a monopoly.
Statutory Notes and Related Subsidiaries
Effective Date
of 1995 AmendmentAmendment by Pub. L. 104–88 effective Jan. 1, 1996, see section 2 of Pub. L. 104–88, set out as an
Effective Date
note under section 1301 of Title 49, Transportation.
Effective Date
of 1984 AmendmentAmendment by Pub. L. 98–443 effective Jan. 1, 1985, see section 9(v) of Pub. L. 98–443, set out as a note under section 5314 of Title 5, Government Organization and Employees.
Effective Date
of 1980 Amendment Pub. L. 96–349, § 6(b), Sept. 12, 1980, 94 Stat. 1158, provided that: “The
Amendments
made by this section [amending this section] shall apply only with respect to acquisitions made after the date of the enactment of this Act [Sept. 12, 1980].”
Transfer of Functions
The Federal Power Commission was terminated, and its functions, personnel, property, funds, etc., were transferred to the Secretary of Energy (except for certain functions which were transferred to the Federal Energy Regulatory Commission) by section 7151(b), 7171(a), 7172(a), 7291, and 7293 of Title 42, The Public Health and Welfare. Maritime Administration of Department of Commerce transferred to Department of Transportation, and all related functions of Secretary and other officers and offices of Department of Commerce transferred to Department of Transportation and vested in Secretary of Transportation, by Maritime Act of 1981, Pub. L. 97–31, Aug. 6, 1981, 95 Stat. 151, which was repealed in part by Pub. L. 109–304, § 19, Oct. 6, 2006, 120 Stat. 1710. See section 109 of Title 49, Transportation.
Executive Documents
Transfer of Functions
Executive and administrative functions of Maritime Commission transferred to Chairman of Maritime Commission by Reorg. Plan No. 6 of 1949, eff. Aug. 19, 1949, 14 F.R. 5228, 63 Stat. 1069, which was repealed by Pub. L. 109–304, § 19, Oct. 6, 2006, 120 Stat. 1710, and was formerly set out in the Appendix to Title 5, Government Organization and Employees. United States Maritime Commission abolished by Reorg. Plan No. 21 of 1950, eff. May 24, 1950, 15 F.R. 3178, 64 Stat. 1273, which was superseded in part by Reorg. Plan No. 7 of 1961, § 305, eff. Aug. 12, 1961, 26 F.R. 7315, 75 Stat. 840, repealed in part by Pub. L. 109–304, § 19, Oct. 6, 2006, 120 Stat. 1710, and remains only partially set out in the Appendix to Title 5. Reorg. Plan No. 21 of 1950 transferred part of Commission’s functions and part of functions of its Chairman, to Federal Maritime Board and Chairman thereof, such Board having been created by that Plan as an agency within Department of Commerce with an independent status in some respects, and transferred remainder of such Commission’s functions and functions of its Chairman to Secretary of Commerce, with power vested in Secretary to authorize their performance by Maritime Administrator (the head of Maritime Administration, which likewise established by the Plan in Department of Commerce) with provision that Chairman of Federal Maritime Board should, ex officio, be such Administrator. section 304 of Reorg. Plan No. 7 of 1961, eff. Aug. 12, 1961, 26 F.R. 7315, 75 Stat. 840, set out in the Appendix to Title 5, abolished Federal Maritime Board, including offices of members of Board. Functions of Board transferred either to Federal Maritime Commission, by section 103 of Reorg. Plan No. 7 of 1961, which was repealed by Pub. L. 109–304, § 19, Oct. 6, 2006, 120 Stat. 1710 and formerly set out in the Appendix to Title 5, or to Secretary of Commerce, by section 202 of Reorg. Plan No. 7 of 1961, set out in the Appendix to Title 5.
Reference
Citations & Metadata
Citation
15 U.S.C. § 18
Title 15 — Commerce and Trade
Last Updated
Apr 6, 2026
Release point: 119-73