Competition Law and Market-Sharing Agreements

1. Introduction

A market-sharing agreement is an arrangement under which competitors agree to divide or allocate a market among themselves instead of competing for the same customers, territories, products, or sources of supply.

Market sharing is one of the classic forms of horizontal cartel conduct. Competition authorities generally treat a genuine agreement between competitors to allocate markets or customers as particularly serious because it removes rivalry directly: instead of competing to win business, each participant receives an agreed portion of the market.

Common forms include:

• Geographic allocation — “Company A gets North India; Company B gets South India.”
• Customer allocation — “Company A supplies government customers; Company B supplies private customers.”
• Product allocation — “Company A sells Product X; Company B sells Product Y.”
• Allocation by sales channel — one competitor serves online customers and another physical retailers.
• Allocation by tender or project — competitors decide which company will pursue particular contracts.
• No-poaching/no-compete arrangements between competitors.
• Allocation of suppliers or sources of raw materials.
• Cross-border market allocation.
• Agreements not to enter or expand in one another's territories.

The Competition Commission of India expressly identifies “agreement to allocate markets” as one of the four principal categories of horizontal agreements presumed to cause an appreciable adverse effect on competition under Section 3(3) of the Competition Act, 2002.

2. Meaning of Market Sharing

A market-sharing agreement exists where competing undertakings coordinate their conduct so that each obtains a protected portion of the market.

For example:

A and B are competitors supplying medical equipment. They agree that A will supply hospitals in Delhi and Haryana while B will supply hospitals in Uttar Pradesh and Rajasthan, and neither will solicit the other's customers.

The agreement does not necessarily contain an express statement that prices will be increased. The allocation itself reduces competitive pressure.

The United States Supreme Court has described agreements between competitors allocating territories to minimize competition as a classic form of unlawful market allocation. United States v. Topco Associates, Inc. is the leading authority.

3. Legal Character of Market-Sharing Agreements

Market sharing is ordinarily treated as a hard-core restriction of competition.

The fundamental economic concern is simple:

Competition normally operates as:

Competitor A ↔ Competitor B ↔ Competitor C → compete for customers

A market-sharing cartel changes this into:

Competitor A → Customer Group 1
Competitor B → Customer Group 2
Competitor C → Customer Group 3

The customer loses the possibility of choosing among competing suppliers.

Consequently, market-sharing arrangements can produce:

• higher prices;
• reduced output;
• reduced innovation;
• lower quality;
• reduced customer choice;
• territorial protection;
• artificial market stability for cartel members;
• exclusion of new competitors;
• coordinated tender outcomes; and
• weakened incentives to improve efficiency.

4. Market Sharing Under Indian Competition Law

Section 3 of the Competition Act, 2002

Section 3 prohibits agreements that cause or are likely to cause an appreciable adverse effect on competition (AAEC).

Section 3(3) specifically addresses agreements between enterprises engaged in identical or similar trade.

It covers agreements relating to:

1. price fixing;
2. limiting or controlling production, supply, markets, technical development or investment;
3. allocation of geographical markets, customers or sources of production or provision of services; and
4. bid rigging or collusive bidding.

The CCI explains that these horizontal agreements are presumed to have an AAEC, although the statutory presumption is rebuttable.

Therefore:

Competitor + agreement/concerted practice + market/customer allocation = serious Section 3(3) issue.

5. Types of Market-Sharing Agreements

A. Geographic Market Allocation

Competitors divide territories.

Example:

A operates in northern states while B operates in southern states, with each agreeing not to enter the other's territory.

Geographic allocation is particularly easy for authorities to identify where there is evidence such as emails, meeting records, internal instructions or coordinated customer lists.

B. Customer Allocation

Competitors agree that certain customers belong exclusively to particular firms.

Examples:

• government customers allocated to A;
• private customers allocated to B;
• large corporate customers allocated to C.

A particularly important variation is the “no-poaching” arrangement, under which competitors agree not to solicit each other's customers.

The UK CMA's investigation into concrete companies found arrangements involving allocation of customers and agreements not to compete for certain customers. The CMA treated these arrangements as part of an illegal cartel.

C. Product Market Allocation

Competitors divide products rather than geographical areas.

For example:

Manufacturer A agrees to manufacture premium products, while Manufacturer B concentrates on standard products, with neither entering the other's segment.

The competition concern increases where the products are close substitutes.

D. Tender or Project Allocation

Competitors decide beforehand who will receive particular contracts.

For example:

• Company A wins Project 1;
• Company B wins Project 2;
• Company C wins Project 3.

This often occurs together with:

• bid rotation;
• cover bids;
• withdrawal of bids;
• price coordination;
• customer allocation.

The CCI has dealt with cases involving geographic allocation combined with bid rigging and relied on documentary communications and bidding arrangements as evidence.

E. Allocation of Sources of Supply

Competitors may agree not to purchase from particular suppliers or not to compete for particular sources.

This can be especially problematic where access to the source is essential for downstream competition.

F. Market-Entry Allocation

Competitors may agree:

“You remain in your existing territory and I will remain in mine.”

Even if the firms do not formally divide a market in which they currently compete, an agreement reserving separate territories can constitute market allocation.

This principle was central to Palmer v. BRG of Georgia, Inc.

6. Essential Elements of a Market-Sharing Violation

A competition authority normally examines several elements.

1. Competitor relationship

The parties generally operate at the same level of the supply chain.

2. Agreement, arrangement or concerted practice

The agreement need not necessarily be written.

It may be established through:

• emails;
• WhatsApp or other communications;
• meeting records;
• spreadsheets;
• tender patterns;
• customer lists;
• internal instructions;
• admissions;
• communications between sales personnel.

Indian competition law expressly recognizes arrangements and understandings that may be written or unwritten.

3. Allocation mechanism

There must be evidence that the parties coordinated who would serve:

• which territory;
• which customer;
• which product;
• which tender;
• which supplier; or
• which market segment.

4. Competitive significance

Authorities examine whether the parties are actual or potential competitors and whether the arrangement affects competitive rivalry.

7. Market Definition

Although market-sharing agreements are normally treated as serious restrictions, identifying the relevant market may still be important.

The authority can examine:

Product market

• Are the products substitutes?
• Are customers able to switch suppliers?
• Are there technological differences?

Geographic market

• Is competition local?
• Regional?
• National?
• International?

Customer dimension

In some industries, government procurement, hospitals, large corporations and consumers may have different purchasing characteristics.

However, the fact that a market is divided into apparently separate segments does not automatically make the arrangement lawful.

8. Direct and Indirect Evidence

Direct evidence

Examples:

“You take Maharashtra; we will take Gujarat.”

or:

“Do not approach this customer because it belongs to us.”

This is extremely powerful evidence.

Indirect evidence

Authorities may instead examine:

• unusual bidding patterns;
• customer allocation patterns;
• communications;
• parallel withdrawal from territories;
• identical internal descriptions of customers;
• unexplained geographic specialization;
• sales personnel communications;
• synchronized tender participation.

The absence of a formal written cartel agreement therefore does not necessarily prevent enforcement.

9. Market Sharing and Bid Rigging

Market sharing frequently overlaps with bid rigging.

For example:

This arrangement can simultaneously constitute:

• market allocation;
• customer allocation;
• bid rigging;
• price coordination.

The CCI's enforcement materials contain examples where parties were found to have geographically allocated tender circles in combination with bid rigging.

10. Market Sharing and Information Exchange

Information exchange can support a market-sharing cartel.

Competitors may exchange:

• customer lists;
• geographic sales data;
• future bids;
• pricing information;
• planned market entry;
• sales volumes;
• production information.

The information exchange may allow cartel members to monitor whether another participant has violated the allocation arrangement.

The CMA's groundworks investigation, for example, involved competitors sharing confidential pricing and strategic information to reduce strategic uncertainty.

11. Six Major Case Laws

Case 1 — United States v. Topco Associates, Inc., 405 U.S. 596 (1972)

Facts

Topco was a cooperative association involving independent grocery stores. Agreements among participating competitors allocated exclusive territories.

Issue

Whether agreements between competitors allocating territories were prohibited under Section 1 of the Sherman Act.

Decision

The U.S. Supreme Court treated horizontal territorial allocation as a per se unlawful restraint.

Principle

Competitors cannot agree to divide territories in order to reduce competition.

The case established one of the classic rules concerning horizontal market allocation.

Significance

Topco remains one of the foundational authorities for the proposition that territorial market allocation among competitors is a core antitrust violation.

Case 2 — Palmer v. BRG of Georgia, Inc., 498 U.S. 46 (1990)

Facts

BRG and Harcourt Brace Jovanovich were involved in the market for bar-review courses.

They entered an arrangement under which BRG received the Georgia market while HBJ retained markets outside Georgia, with the parties agreeing not to compete against each other.

Decision

The U.S. Supreme Court held the arrangement unlawful.

Importantly, the Court rejected the argument that market allocation is unlawful only when competitors divide a market in which they previously competed.

Principle

Competitors cannot lawfully reserve separate markets for themselves simply because they did not previously compete in all of those markets.

Significance

The case is particularly important for:

• geographic allocation;
• market-entry restrictions;
• territorial exclusivity between competitors;
• per se treatment of horizontal market allocation.

Case 3 — United States v. Sealy, Inc., 388 U.S. 350 (1967)

Facts

Sealy operated a licensing system for mattress manufacturers and distributors. Territorial restrictions limited where licensees could sell.

Decision

The Supreme Court treated the arrangement as a horizontal restraint because the substance and ownership structure showed that the supposedly vertical licensing arrangement involved competitors coordinating territorial restrictions.

Principle

Businesses cannot avoid antitrust scrutiny merely by giving a market-sharing arrangement a licensing or contractual form.

Significance

Sealy is important for distinguishing genuine vertical restrictions from arrangements that effectively coordinate competitors.

Case 4 — Suiker Unie v. Commission, Joined Cases 40–48, 50, 54–56, 111, 113 & 114/73 (1975)

Facts

The European Commission investigated arrangements involving sugar producers and related conduct affecting competition in European markets.

Decision

The European Court of Justice examined coordinated conduct and market protection arrangements under the predecessor provisions to what is now Article 101 TFEU.

Principle

Competition law can address arrangements by which undertakings protect particular markets or customers from competitors.

Significance

The case is historically important in developing EU jurisprudence concerning:

• concerted practices;
• market protection;
• coordinated conduct;
• Article 101-type restrictions.

Case 5 — Gosselin Group NV v European Commission, Case C-429/11 P

Facts

The case concerned cartel conduct in the international removal-services sector.

The European Commission found arrangements involving allocation of markets and customers.

Decision

The EU courts treated market-sharing arrangements as particularly serious restrictions of competition.

The Court of Justice has repeatedly characterized market-sharing arrangements as conduct whose very object is restrictive of competition.

Principle

Market-sharing agreements are generally among the most serious forms of horizontal cartel conduct.

Significance

The case illustrates the EU's strict approach to customer and market allocation.

Case 6 — YKK Corporation and Others v European Commission, Case C-408/12 P

Facts

The case concerned a cartel in the market for fastening products, including coordination among competitors concerning markets and customers.

Decision

The EU courts treated the market-sharing aspects as serious cartel conduct.

The Court of Justice has expressly referred to market-sharing agreements as particularly serious infringements of Article 101 TFEU.

Principle

An agreement allocating customers or markets can constitute a restriction by object, meaning that extensive proof of actual market effects is generally unnecessary once the requisite agreement and context are established.

Case 7 — Nexans France SA and Nexans SA v European Commission, Case C-606/18 P

Facts

The case concerned the power-cable industry.

The European Commission identified a cartel involving extensive allocation of markets and customers in relation to high-voltage submarine and underground power cables.

Decision

The EU litigation confirmed the seriousness of the cartel conduct and addressed, among other issues, the Commission's investigative powers and the treatment of the cartel.

Principle

International market allocation can constitute a single broad cartel strategy even where the allocation covers numerous countries, customers and projects.

Significance

The case is particularly useful for modern multinational industries involving:

• infrastructure;
• energy;
• international procurement;
• major projects;
• cross-border customers.

Case 8 — Ministry of Commerce, Government of India v. Puja Enterprises & Others

Facts

The case concerned a tender for polyester-blended duck ankle boots.

The investigation identified coordinated bidding and market-sharing conduct.

Decision

The CCI found conduct involving:

• bid rigging;
• price/rate coordination;
• limitation of supply; and
• sharing of the relevant market.

The CCI considered the conduct under Sections 3(1), 3(3)(a), 3(3)(b), 3(3)(c) and 3(3)(d).

Principle

Market allocation occurring within a public procurement process can simultaneously constitute bid rigging and other forms of horizontal cartel conduct.

12. Recent Indian Example: Amreesh Neon

In Amreesh Neon Pvt. Ltd. v. Competition Commission of India, the dispute concerned allegations of bid rigging, price fixing and allocation of market territories.

The investigation relied on communications and other evidence concerning the tender process. The CCI found contraventions involving Sections 3(3)(c) and 3(3)(d), and the matter subsequently reached the courts.

The case demonstrates the evidentiary importance of emails and tender-related communications in proving market allocation.

13. EU Approach: Restriction by Object

Under Article 101(1) TFEU, agreements that have as their object or effect the restriction of competition are prohibited.

Market-sharing agreements generally fall into the restriction-by-object category.

The EU courts have stated that market-sharing agreements are particularly serious breaches and can have an inherently restrictive object.

The European Commission's competition materials likewise identify allocation of geographic markets, product markets and customers as a form of market sharing.

Practical consequence

The authority ordinarily does not need to demonstrate the same level of detailed economic harm required for conduct that is not restrictive by object.

14. United States Approach

The U.S. Sherman Act prohibits agreements restraining interstate commerce.

Horizontal market allocation is traditionally treated as a per se violation.

The principal authorities are:

1. United States v. Topco Associates
2. Palmer v. BRG of Georgia
3. United States v. Sealy

The essential principle is:

Competitors must compete for customers and territories rather than agree in advance who will receive them.

15. United Kingdom Approach

In the UK, Chapter I of the Competition Act 1998 prohibits agreements, decisions and concerted practices that have as their object or effect the prevention, restriction or distortion of competition.

Market sharing is a classic cartel concern.

The CMA has investigated market-sharing arrangements in several industries.

For example, in the precast concrete sector, the CMA found arrangements involving price coordination, customer allocation and information exchange, resulting in substantial penalties.

The CMA's case database also identifies numerous Chapter I cartel investigations involving construction, retail, pharmaceuticals and other sectors.

16. Market Sharing Versus Legitimate Territorial Restrictions

Not every territorial restriction automatically constitutes illegal market sharing.

The critical distinction is often who is agreeing with whom and why.

Potentially unlawful

Competitor A ↔ Competitor B
“You will not sell in my territory, and I will not sell in yours.”

Potentially different legal analysis

Manufacturer → independent distributor
“You have an exclusive distribution territory.”

The second arrangement may be vertical and can require a different analysis under the applicable competition regime.

However, competitors cannot simply disguise a horizontal cartel as a vertical arrangement.

The reasoning in Sealy is particularly important here.

17. Market Sharing and Joint Ventures

A genuine joint venture can require parties to divide responsibilities.

For example:

Company A manufactures component X; Company B manufactures component Y for a jointly developed product.

That does not automatically constitute an unlawful market-sharing cartel.

The question is whether the restriction is:

• genuinely connected to legitimate cooperation;
• objectively necessary for the cooperation;
• proportionate;
• limited in duration and scope; and
• consistent with the applicable competition-law framework.

A supposed joint venture cannot be used as a mechanism for competitors to divide unrelated markets.

18. Possible Economic Effects

Market-sharing arrangements can cause several forms of consumer harm.

A. Higher prices

Without competing suppliers, the allocated supplier may have greater pricing freedom.

B. Reduced output

A protected firm may supply less because it faces less competitive pressure.

C. Reduced innovation

Competition normally creates incentives to improve:

• technology;
• product quality;
• delivery;
• customer service.

Market allocation reduces those incentives.

D. Reduced consumer choice

Customers may effectively have only one cartel-designated supplier.

E. Entry barriers

New entrants may find that established competitors collectively control customers and territories.

F. Procurement harm

Public authorities may pay more where competitors decide in advance which bidder will win.

19. Defences and Exceptions

Because market sharing is generally a hard-core restriction, potential justifications must be examined carefully.

Possible issues include:

1. Genuine collaboration

A legitimate joint venture may require some restriction.

2. Vertical distribution arrangements

Exclusive territories involving firms at different levels of the supply chain may require a separate vertical-restraint analysis.

3. Specialisation

Competitors may sometimes specialize in different products or production activities under applicable exemption regimes.

4. Efficiency justification

Under legal systems permitting an efficiency assessment, parties may attempt to demonstrate:

• production efficiencies;
• distribution efficiencies;
• technological improvements;
• consumer benefits.

However, a naked horizontal market-sharing cartel generally faces substantial difficulty in establishing a lawful justification.

20. Evidence Authorities Commonly Examine

A market-sharing investigation may involve:

Documentary evidence

• emails;
• contracts;
• handwritten notes;
• spreadsheets;
• customer allocation lists;
• internal presentations.

Digital evidence

• messaging applications;
• electronic calendars;
• shared files;
• CRM records;
• tender databases.

Economic evidence

• changes in market shares;
• geographic sales patterns;
• tender outcomes;
• customer switching;
• pricing patterns.

Witness evidence

• sales employees;
• managers;
• executives;
• procurement personnel.

Leniency/cooperation evidence

One cartel participant may disclose the arrangement and provide evidence in exchange for leniency or reduced penalties where the applicable regime provides for it.

The UK groundworks investigation is an example where one participant obtained leniency after bringing the conduct to the CMA's attention and cooperating.

21. Penalties and Remedies

Depending upon jurisdiction, consequences may include:

• substantial administrative fines;
• criminal sanctions in certain jurisdictions;
• director disqualification;
• damages actions;
• compensation claims;
• injunctions;
• behavioural remedies;
• compliance programmes;
• procurement consequences;
• exclusion from public contracts;
• individual liability.

The UK precast-concrete investigation, for example, resulted in £36 million in fines and director disqualification measures.

In India, Section 3 violations can result in significant monetary penalties, while individual responsibility may arise under Section 48 where statutory requirements are satisfied.

22. Compliance Measures for Businesses

Businesses should adopt clear rules against discussions with competitors concerning:

• customer allocation;
• territories;
• future bids;
• market-entry plans;
• pricing;
• output;
• suppliers;
• sales quotas;
• future commercial strategy.

Employees should be instructed:

Do not say:

“That customer belongs to us.”

Do not agree:

“You take this state and we will take that state.”

Do not discuss:

“Which competitor will bid for which tender?”

Instead, employees should independently determine:

• prices;
• customers;
• territories;
• bids;
• production;
• marketing strategy.

23. Market-Sharing Agreement: Analytical Framework

A useful exam or enforcement framework is:

Step 1 — Identify the parties
↓
Are they actual or potential competitors?

Step 2 — Identify the arrangement
↓
Is there an agreement, understanding or concerted practice?

Step 3 — Identify the allocation
↓
Territory / customer / product / tender / supplier / market segment?

Step 4 — Determine horizontal or vertical character
↓
Are the parties competitors at the same level?

Step 5 — Apply the relevant statutory provision
↓
India: Section 3(3)(c)
EU: Article 101 TFEU
UK: Chapter I Competition Act 1998
US: Section 1 Sherman Act

Step 6 — Determine whether it is a restriction by object/per se restriction
↓
If yes, extensive effects analysis may be unnecessary.

Step 7 — Examine evidence
↓
Documents + communications + conduct + economic evidence.

Step 8 — Consider legitimate cooperation or exemption
↓
Only where legally applicable.

Step 9 — Determine remedies and penalties

24. Important Distinction: Market Sharing vs Market Division

The expressions are often used interchangeably, but analytically they can be distinguished.

Market sharing

Broad concept covering agreements allocating:

• customers;
• territories;
• products;
• suppliers;
• contracts.

Market division

A narrower description of dividing a market into protected portions.

Thus:

Market division is generally a form of market sharing.

The U.S. Supreme Court in Palmer specifically rejected an overly narrow interpretation requiring the parties to divide a market in which they had previously competed.

25. Market Sharing in Digital Markets

Modern market-sharing arrangements may occur without an obvious geographic division.

Examples include competitors agreeing to divide:

• platform users;
• online sellers;
• advertising customers;
• app categories;
• digital distribution channels;
• cloud customers;
• AI-development markets;
• data sources.

A digital cartel could therefore allocate customers through algorithms, account lists or platform rules rather than a traditional written territorial agreement.

The legal question remains whether competitors have coordinated their independent competitive decisions.

26. Key Case-Law Principles at a Glance

27. Conclusion

Market-sharing agreements are among the clearest forms of horizontal anti-competitive conduct. They replace independent competition with an agreed division of customers, territories, products, suppliers or contracts.

The central legal principle across major competition regimes is that competitors should independently determine where, to whom and for which business they compete.

The principal authorities—Topco, Sealy, Palmer, Suiker Unie, Gosselin, YKK, Nexans and Indian CCI decisions such as Puja Enterprises—demonstrate the consistent treatment of naked market allocation as serious cartel conduct.