1. What Is DRAM Antitrust Litigation?
DRAM, or dynamic random access memory, is semiconductor memory used in computers, servers, mobile devices, and other electronic products. DRAM antitrust cases generally examine whether competitors acted independently in response to market conditions or entered an unlawful agreement concerning price, output, customers, or supply.
Section 1 of the Sherman Act prohibits agreements that unreasonably restrain trade. Naked agreements among competitors to fix prices or restrict output can be unlawful per se, but similar pricing or production decisions made independently do not establish an agreement.
For broader issues involving competitor coordination, antitrust economics, class actions, and federal antitrust procedure, see the firm's Antitrust Litigation practice.
2. The 2026 Garciaguirre DRAM Antitrust Class Action
In Garciaguirre et al. .. Samsung Electronics Co., Ltd. .t al., No. 5:26-cv-06345 (N.D. Cal.), plaintiffs filed a proposed antitrust class action on June 25, 2026, naming Samsung Electronics, Samsung Semiconductor, SK hynix, SK hynix America, and Micron Technology as defendants and asserting a Sherman Act § 1 claim. Garciaguirre case docket
What Does the Complaint Allege?
The plaintiffs allege that the defendants coordinated restrictions on conventional DRAM supply and thereby contributed to higher prices. Their theory treats the challenged production and capacity decisions as concerted conduct rather than independent responses to changing demand, product transitions, and semiconductor manufacturing economics.
The defendants dispute those allegations. On September 2, 2026, they filed a joint motion to dismiss, arguing that the complaint does not plausibly allege an agreement and substantially repackages a conspiracy theory rejected in the earlier DRAM litigation. As of the latest update to this page, the motion to dismiss remains pending, and no court has determined that the alleged conspiracy occurred.
Why Does HBM Matter to the Current Allegations?
High-bandwidth memory, or HBM, has become increasingly important for AI and data-center applications. Plaintiffs contend that movement of manufacturing capacity toward HBM coincided with restrictions on supplies of conventional DRAM products.
That allegation does not itself establish coordination. A manufacturer may independently shift capacity toward a product with different demand, margins, technical requirements, or strategic importance. The antitrust question is whether the pleaded facts plausibly support an agreement among competitors rather than parallel responses to similar market incentives.
3. Earlier DRAM Price-Fixing Litigation and DOJ Enforcement
The current allegations should be separated from the historical DRAM cartel prosecuted more than two decades ago. The relevant periods, evidence, procedural records, and legal outcomes are different.
The 1999–2002 DRAM Cartel Cases
DOJ prosecuted an international conspiracy involving DRAM prices sold to certain original equipment manufacturers during a period beginning in 1999 and ending in 2002. Samsung and Hynix ultimately pleaded guilty to participating in that historical conspiracy, as did other manufacturers. DOJ's historical DRAM prosecution materials
The historical prosecutions involved specific competitor meetings and communications concerning pricing, agreed price levels, quotations, and exchanges of sales information. Samsung was sentenced to a $300 million criminal fine and Hynix to a $185 million criminal fine following their guilty pleas.
That history provides context, but it does not establish liability for conduct alleged during a different period.
4. The 2018 DRAM Litigation and the Ninth Circuit'S 2022 Decision
The most significant recent appellate precedent for the current dispute is the Ninth Circuit's decision in In re Dynamic Random Access Memory (DRAM) Indirect Purchaser Antitrust Litigation.
Plaintiffs in that case alleged that Samsung, Micron, and SK hynix coordinated reductions in DRAM production beginning in 2016. Their conspiracy theory relied on parallel conduct and several alleged plus factors said to suggest an agreement.
The Ninth Circuit affirmed dismissal. It held that plaintiffs relying on parallel business conduct must plead further factual enhancement placing that conduct in a context suggesting a preceding agreement. The alleged plus factors, considered individually and together, did not move the theory from possible to plausible. Ninth Circuit DRAM opinion
The decision does not establish that later allegations involving different conduct necessarily fail. It does establish an important pleading principle: lawful conscious parallelism must be distinguished from concerted action through facts supporting a plausible inference of agreement.
5. Parallel Conduct, Plus Factors, and Section 1
Parallel conduct occurs when competitors make similar decisions, such as raising prices, reducing output, or reallocating production. Similar behavior can be relevant circumstantial evidence, but it is not synonymous with conspiracy.
Agreement or Concerted Action
Section 1 requires concerted conduct. The central defense question is whether the alleged facts support an actual agreement rather than independent decisions made by competitors facing similar economic conditions.
Communications among competitors can matter, but their existence or subject matter should be evaluated in context. The issue is whether the communication and surrounding conduct support coordination on a competitively significant decision.
Plus Factors
Plus factors are circumstances plaintiffs use to argue that parallel conduct is better explained by agreement than independent action. Depending on the case, allegations may concern competitor communications, information exchanges, price signaling, conduct said to be contrary to unilateral economic interest, market concentration, or coordinated capacity changes.
No single factor should be treated mechanically. A concentrated market can make competitors more responsive to one another while remaining consistent with lawful conscious parallelism. Simultaneous production changes can likewise result from common costs, demand conditions, technological transitions, inventories, or capacity constraints.
Economic Evidence
Semiconductor antitrust litigation frequently requires analysis of supply, demand, capacity, inventories, product substitution, pricing, costs, and investment incentives.
In a DRAM case, economists may examine whether conventional DRAM and HBM compete for the same production resources, whether capacity reallocations are consistent with independent profit-maximizing behavior, how investment decisions are made over time, and whether observed price movements are better explained by alleged restrictions or other market conditions.
6. Price Fixing and Supply Restrictions in Semiconductor Markets
Traditional price fixing involves competitors agreeing on prices or pricing terms. An agreement among competitors to restrict production or output can likewise constitute a serious horizontal restraint because limiting supply can raise market prices.
The more difficult litigation question arises when no express agreement is apparent and several competitors respond similarly to the same market conditions. Semiconductor production involves substantial capital investment, long planning horizons, fabrication constraints, product transitions, and continuing allocation of capacity among technologies.
The defense should therefore distinguish evidence of coordination from conduct explained by common technological or economic incentives.
7. Class Actions and Purchaser Issues
DRAM antitrust litigation can involve direct purchasers, indirect purchasers, OEMs, businesses purchasing DRAM-containing products, and proposed consumer classes. Purchaser status can materially affect federal and state claims, class definitions, standing, causation, and damages.
Direct and Indirect Purchasers
Under Illinois Brick Co. v. Illinois, indirect purchasers generally cannot recover federal antitrust treble damages under § 4 of the Clayton Act based on an overcharge passed through intermediaries, subject to limited recognized exceptions.
State law can differ. In California v. ARC America Corp., the Supreme Court held that federal antitrust law does not preempt state laws allowing indirect purchasers to recover under state antitrust statutes.
For DRAM sold as a component and later incorporated into computers, servers, or other products, identifying where a purchaser sits in the distribution chain can therefore materially change the claims and damages analysis.
Class Certification and Damages
Class certification can raise questions about whether proposed class members experienced a common overcharge, whether any alleged overcharge was passed through different levels of distribution, and whether damages can be measured reliably on a classwide basis.
Economic models may need to account for product type, contract structure, purchaser category, timing, distribution channel, and downstream pricing. Those issues should be separated from the threshold question of whether an unlawful agreement existed.
8. Cross-Border Issues for Semiconductor Manufacturers
DRAM manufacturing, corporate decision-making, records, employees, and customers frequently span multiple jurisdictions. U.S. .ntitrust litigation involving a foreign parent and U.S. .ubsidiaries can therefore raise jurisdictional, discovery, and foreign-commerce issues.
The Foreign Trade Antitrust Improvements Act generally excludes non-import foreign commerce from the Sherman Act unless the statutory domestic-effects requirements are met; import commerce is treated differently and falls outside that general exclusion.
The Supreme Court's Empagran decision further illustrates that a domestic effect is not enough to support a Sherman Act claim based solely on an independent foreign injury. Foreign-commerce analysis therefore requires attention to the transaction, injury, and relationship between domestic and foreign effects.
Foreign headquarters also create practical discovery issues involving documents, witnesses, data transfer, privilege, and parallel regulatory proceedings. A foreign parent and U.S. .ubsidiary should not automatically be treated as one entity for liability, jurisdiction, or discovery purposes.
9. Evidence in DRAM Antitrust Litigation
The evidentiary record can extend well beyond published DRAM prices. Important material may include capacity planning, product roadmaps, customer pricing communications, forecasts, inventory records, sales data, executive communications, competitor contacts, and information concerning transitions between conventional DRAM and HBM.
Context matters. A document discussing competitor pricing does not automatically establish an agreement. Its source, recipients, business purpose, use in decision-making, and relationship to later pricing or capacity decisions can change its significance.
Economic data should also be preserved in a form that permits expert analysis. Production volumes, pricing records, capacity utilization, demand forecasts, customer segments, product substitution, and cost information may be necessary to test both conspiracy and damages theories.
10. Practical Pitfalls in Semiconductor Antitrust Litigation
Treating concentration as proof of conspiracy. A concentrated market can be relevant context without establishing concerted action.
Failing to preserve the business record behind parallel decisions. Capacity plans, demand forecasts, customer requirements, investment approvals, and product-transition records may explain why companies made similar decisions independently.
Conflating current allegations with the historical cartel. Earlier guilty pleas concerned a different period and evidentiary record; later claims must satisfy their own legal requirements.
Approaching overseas evidence as ordinary domestic discovery. Headquarters records, foreign witnesses, data-transfer restrictions, and local-law issues can require coordinated analysis.
Treating private litigation as isolated from government exposure. A class action can develop alongside DOJ, state, or foreign competition proceedings, although each has distinct standards and procedures.
11. How Counsel Can Defend DRAM and Semiconductor Antitrust Claims
Defense counsel can challenge whether the pleaded or proven facts establish an agreement, develop the economic record explaining pricing and capacity decisions, and coordinate discovery across U.S. .nd foreign entities.
Representation may also involve dismissal and class-certification motions, antitrust economists and other experts, government-investigation response, trial, appeal, and coordination of related proceedings without treating allegations in one forum as established facts in another.
12. Frequently Asked Questions
No. A motion to dismiss generally tests whether the complaint states a legally sufficient claim based on the pleading standards applicable at that stage. A ruling on pleading sufficiency is not necessarily a determination of the ultimate truth of disputed factual allegations.
Yes, depending on the transactions and statutory requirements. Import commerce and other foreign conduct are treated differently, and the FTAIA can limit application of the Sherman Act to specified non-import foreign-commerce conduct.
Yes. Private litigation, DOJ enforcement, state investigations, and foreign competition proceedings are legally distinct but can concern overlapping conduct and evidence.
Preservation should be tied to the allegations and anticipated proceedings. Potentially relevant sources can include competitor communications, customer and pricing records, capacity and production planning, inventory information, product-roadmap materials, meeting records, and data maintained by U.S. .r foreign affiliates.
22 Sep, 2026
