Can anybody sue to block an M&A deal (given it's a civil case as I believe?
The answer to that is very clearly no, because of the doctrine of standing: Standing is, in its simplest form, the right of an injured party to sue someone responsible for the damage. Or rather, it is usually argued by the defending party: Only someone that was injured by the defending party can sue them. Let's make some examples:
- If Alice hits Bob, Bob has standing to sue Alice for damages (=money). Mortimer, unrelated to everything, has no standing to do that.
- If Bob dies from the hit, Bob's wife Charlene may sue Alice instead. Mortimer, again, does not.
- If Delta-Corporation's toaster set Bob's and Charlene's house on fire, they may sue Delta-Corporation. Mortimer, once again unrelated, does not.
However, standing is more complex than that. Relevant to the FTC, some agencies are granted standing based on the fact that they represent the common interest or are specifically tasked to do things:
- If Alice does not pay her taxes, the IRS has standing to sue her for the taxes.
- If Alice murders Bob, the prosecutor's office may go after Alice criminally and put her into jail.
- If Delta-Corporation's unsafe toaster is sold thousands of times, a Consumer Protection Office that is empowered to do so (not all are!) might step up and get an injunction against Delta-Corporation's toaster ovens.
An individual end consumer does not have any chance of standing in this matter of Antitrust Law against a producer of the product, especially if they buy the item from a retailer.
No one individual
had a sufficient economic stake to bear the litigation burden necessary to
maintain a private suit for recovery under section 4. Restrictive judicial
interpretation of the notice and manageability provisions of F.R.C.P. 23 and
proof of individual damages has made consumer class actions rare.
- Journal of Legislation, Vol. 6: 85, Consumer Standing in Antitrust violations: The Kennedy Proposal
Illinois Brick also establishes this in part: Only a direct purchaser has standing. So if you buy your games from Steam, or Epic, you have no standing to sue Microsoft or Activision. Steam and Epic would need to sue Microsoft or Activision.
However, the FTC is special: they are directly legislated to be able to bring antitrust lawsuits. They were empowered by the FTCA of 1914, the Sherman Antitrust Act of 1890 and the Clayton Act of 1914. The most relevant article that grants them the power to actually do things can be found in 15 USC §44 & §45. In fact, let me bold it for you:
15 USC §45
(2) The Commission is hereby empowered and directed to prevent persons, partnerships, or corporations, except banks, savings and loan institutions described in section 57a(f)(3) of this title, Federal credit unions described in section 57a(f)(4) of this title, common carriers subject to the Acts to regulate commerce, air carriers and foreign air carriers subject to part A of subtitle VII of title 49, and persons, partnerships, or corporations insofar as they are subject to the Packers and Stockyards Act, 1921, as amended [7 U.S.C. 181 et seq.], except as provided in section 406(b) of said Act [7 U.S.C. 227(b)], from using unfair methods of competition in or affecting commerce and unfair or deceptive acts or practices in or affecting commerce.
That sentence directly says, the FTC is empowered and talked with enforcing all the antitrust laws, which gives them also standing to enforce the laws (by working together with the DoJ usually).