Competition Compliance Officer Obligations in Large Platforms

1. Introduction

A Competition Compliance Officer in a large digital platform is responsible for helping the company identify, prevent, detect, investigate, and remediate conduct that may violate competition/antitrust law.

Large platforms create special compliance challenges because they may simultaneously operate as:

marketplace operators;

sellers;

advertisers;

search engines;

app stores;

payment systems;

cloud providers;

data intermediaries;

AI providers;

infrastructure providers.

This can create conflicts between the platform's role as a neutral intermediary and its role as a competitor.

A Competition Compliance Officer therefore has to monitor issues such as:

abuse of dominance/monopolization;

self-preferencing;

discriminatory access;

tying and bundling;

exclusive agreements;

loyalty rebates;

refusal to deal;

interoperability restrictions;

algorithmic coordination;

exchange of competitively sensitive information;

acquisitions of emerging competitors;

marketplace restrictions;

pricing algorithms;

employee no-poach arrangements;

data-related exclusion;

retaliation against business users.

Important: “Competition Compliance Officer” is generally an internal governance/compliance function, not a universally defined statutory office. The precise legal duties depend on the jurisdiction, company structure, regulatory orders, applicable competition law, and internal delegation of responsibilities.

2. Why Large Platforms Need Special Competition Compliance

Traditional businesses often have relatively clear boundaries between:

manufacturer → wholesaler → retailer → consumer.

A large platform can occupy several positions simultaneously:

Platform + competitor + data controller + infrastructure provider + advertiser + gatekeeper.

This creates risks of vertical and horizontal conflicts.

Example

Suppose a marketplace allows independent sellers to use its platform.

The platform also sells its own products.

The compliance question becomes:

Can the platform use seller data, ranking information, search information, or transaction data to advantage its own products?

That question can involve:

dominance;

self-preferencing;

discriminatory treatment;

access conditions;

data advantages;

foreclosure.

3. Core Obligations of a Competition Compliance Officer

A useful framework is:

Identify → Prevent → Monitor → Investigate → Escalate → Remediate → Document

4. Obligation 1 — Identify Competition Risk

The first responsibility is competition-risk mapping.

The officer should identify:

A. Markets

relevant product markets;

geographic markets;

platform sides;

adjacent markets;

upstream/downstream markets.

B. Sources of market power

market share;

network effects;

data advantages;

switching costs;

ecosystem control;

interoperability;

entry barriers;

brand/network effects.

C. Potentially problematic conduct

exclusive contracts;

tying;

bundling;

discriminatory ranking;

self-preferencing;

loyalty discounts;

refusal to supply;

interoperability restrictions;

acquisition strategies.

5. Obligation 2 — Monitor Dominance

A compliance officer should not assume:

“We were not dominant last year, therefore we cannot have a competition problem.”

Platform markets can change rapidly.

Monitoring should therefore include:

market shares;

competitor entry;

customer switching;

network effects;

platform dependency;

technological developments;

acquisitions;

ecosystem expansion.

Important distinction

Large market share ≠ automatic infringement.

The legal risk increases when market power is combined with potentially exclusionary conduct.

6. Obligation 3 — Prevent Abuse of Dominance

Where a platform has substantial market power, compliance controls should focus particularly on:

Self-preferencing

Giving the platform's own products or services preferential treatment.

Tying

Making access to one product conditional on taking another.

Bundling

Combining products in a way that may disadvantage rivals.

Loyalty incentives

Using rebates or contractual incentives that potentially foreclose competitors.

Refusal to deal

Withholding access to an important facility or input.

Discrimination

Applying materially different conditions to comparable business users without adequate justification.

7. Obligation 4 — Establish a Competition Review Process

Major commercial decisions should undergo competition review.

A platform can create a:

Competition Impact Assessment

before implementing:

major pricing changes;

ranking changes;

new platform rules;

API restrictions;

access restrictions;

interoperability changes;

exclusivity arrangements;

loyalty programmes;

tying/bundling;

significant acquisitions.

The assessment should record:

business objective;

affected market;

competitors affected;

market-power position;

possible foreclosure;

legitimate business justification;

alternative less restrictive approaches;

legal review;

approval.

8. Obligation 5 — Algorithmic Competition Compliance

This is increasingly important.

Large platforms use algorithms for:

pricing;

ranking;

recommendations;

advertising;

search;

matching;

inventory;

promotions;

fraud detection.

The Competition Compliance Officer should establish controls against:

A. Algorithmic coordination

Algorithms should not be designed or used to facilitate unlawful coordination between competitors.

B. Algorithmic discrimination

Ranking or access algorithms should be reviewed where they potentially discriminate against competing businesses.

C. Self-preferencing

The platform should assess whether algorithmic changes systematically favour its own services.

D. Dynamic pricing

Pricing algorithms should be tested for potential coordination or exclusionary effects.

E. Data feedback loops

The compliance team should monitor whether:

more users → more data → better algorithm → more users

creates a reinforcing market-power mechanism combined with exclusionary conduct.

9. Obligation 6 — Information Governance

A platform may receive enormous amounts of commercially sensitive information from businesses using its service.

Examples:

prices;

inventory;

costs;

sales volumes;

customer information;

future product launches;

marketing strategies;

supplier information.

The compliance officer should establish information firewalls.

For example:

Marketplace sellers' confidential information should not automatically become available to the platform's competing retail division.

This is particularly important where the platform acts both as:

intermediary + competitor.

10. Obligation 7 — Contract Review

Platform contracts should be screened for:

exclusivity;

non-compete provisions;

parity clauses;

MFNs;

tying;

bundling;

discriminatory access;

termination rights;

interoperability restrictions;

data-use provisions;

loyalty incentives.

The compliance officer should create a system where high-risk clauses automatically receive competition-law review.

11. Obligation 8 — Merger and Acquisition Compliance

Large platforms frequently acquire:

startups;

competitors;

complementary businesses;

data companies;

AI companies;

infrastructure companies.

Competition compliance must therefore involve M&A review.

Questions include:

Is the target a current competitor?

Could it become a future competitor?

Does it possess strategically important data?

Does it control an important technology?

Could the acquisition eliminate a competitive constraint?

Are merger-control filings required?

Are there jurisdiction-specific notification requirements?

12. Obligation 9 — Training Employees

Competition compliance cannot be limited to the legal department.

Training should cover:

Sales teams

pricing;

exclusivity;

customer allocation.

Product teams

platform access;

ranking;

interoperability.

Engineering teams

algorithms;

APIs;

data access.

Procurement teams

buyer coordination;

supplier allocation.

M&A teams

competitor acquisitions;

information exchange.

Executives

strategic decisions involving competitors and market power.

13. Obligation 10 — Maintain Documentation

A major compliance responsibility is maintaining evidence of:

legal assessments;

risk reviews;

approvals;

training;

algorithm audits;

contract reviews;

investigation records;

remedial actions.

Good documentation helps demonstrate that the company has a functioning compliance system.

But documentation should not be used to create artificial justifications after the fact.

14. Case Law 1 — United Brands v Commission

Case 27/76, United Brands v Commission

Facts

United Brands held a powerful position in the banana market.

The Commission found several practices abusive.

Principle

The Court explained the concept of a dominant position as a position of economic strength allowing an undertaking to behave to an appreciable extent independently of competitors, customers and consumers.

The case also addressed discriminatory conditions.

Relevance to Compliance Officers

A compliance officer should therefore monitor:

market power;

customer dependency;

discriminatory treatment;

contractual practices.

Compliance lesson

Dominance creates increased competition-law responsibility.

15. Case Law 2 — Hoffmann-La Roche v Commission

Case 85/76

Facts

Hoffmann-La Roche used loyalty-related arrangements concerning vitamins.

Principle

The Court treated certain exclusive or loyalty-inducing arrangements by a dominant undertaking as abusive because they could restrict competition.

The judgment is a fundamental Article 102 authority.

Compliance lesson

A dominant platform should have a system for reviewing:

exclusivity;

loyalty rebates;

conditional discounts;

incentives tied to customer purchasing behaviour.

The officer should not assume:

“The discount benefits customers, therefore it is automatically lawful.”

The competitive context matters.

16. Case Law 3 — Microsoft v Commission

Case T-201/04

Facts

Microsoft's conduct concerning interoperability and tying was examined under EU competition law.

Principle

The case addressed:

interoperability;

refusal to provide information;

tying;

ecosystem power.

The General Court upheld important parts of the Commission's findings.

Relevance

This is highly relevant to modern platforms because platform ecosystems often control:

APIs;

operating systems;

technical interfaces;

data;

interoperability.

Compliance lesson

Before restricting interoperability, the compliance officer should ask:

What legitimate technical objective exists?

Is the restriction necessary?

Does it disadvantage competitors?

Does the platform have substantial market power?

Is there a less restrictive alternative?

17. Case Law 4 — Intel v Commission

C-413/14 P, Intel v Commission

Facts

Intel provided rebates to major computer manufacturers and a major retailer.

Principle

The Court of Justice emphasized that, where relevant, assessment of rebate conduct may require consideration of economic factors such as:

dominant position;

market coverage;

duration;

rebate amount;

competitors' position;

possible exclusionary capability;

as-efficient-competitor analysis where appropriate.

Compliance lesson

A compliance officer should not approve a rebate programme solely because:

“The contract does not expressly prohibit competitors.”

The economic effect of the programme can matter.

18. Case Law 5 — Google Shopping

Google and Alphabet v Commission, C-48/22 P

Facts

Google operated a dominant general search service and treated its own comparison-shopping service differently from competing comparison-shopping services.

Principle

The EU courts upheld the core competition finding concerning Google's conduct.

The case demonstrates that differentiated treatment by a dominant platform can raise Article 102 concerns where it is capable of disadvantaging competing services.

Compliance lesson

Platforms should establish controls over:

search ranking;

recommendation systems;

display positions;

traffic allocation;

platform-owned services.

A particularly important question is:

Would the same ranking rule apply if the platform's own service were a competitor rather than an internal product?

19. Case Law 6 — Google Android

T-604/18

Facts

The Commission examined contractual practices concerning Google's Android ecosystem, including arrangements concerning:

search;

browser distribution;

application distribution;

pre-installation.

Principle

The case demonstrates the competition risks that can arise when a dominant platform uses contractual arrangements across an ecosystem to reinforce its position.

Compliance lesson

Platform compliance officers should examine the combined effect of several contracts rather than reviewing each contract completely in isolation.

For example:

Device agreement + app-store requirement + search agreement

may produce a different competitive effect from each agreement considered separately.

20. Case Law 7 — Verizon Communications v Trinko

540 U.S. 398 (2004)

Facts

The US Supreme Court considered allegations involving Verizon's obligations concerning telecommunications access.

Principle

The Court adopted a cautious approach to imposing antitrust duties to deal with competitors.

It emphasized that antitrust law should not automatically require monopolists to share resources with competitors.

Compliance lesson

A platform should not assume:

“Any refusal to provide access is illegal.”

But neither should it assume:

“We can always refuse access.”

The legal analysis depends upon the specific circumstances and applicable regulatory obligations.

21. Case Law 8 — United States v Microsoft

253 F.3d 34 (D.C. Cir. 2001)

Facts

Microsoft possessed monopoly power in Intel-compatible PC operating systems.

The government challenged practices directed at competing technologies.

Principle

The court distinguished legitimate competition from exclusionary conduct and found liability for several practices that maintained Microsoft's monopoly position.

Compliance lesson

This case demonstrates why product-development decisions should receive competition review where a dominant platform:

controls a key gateway;

changes technical interfaces;

restricts competitors;

contracts with distributors;

integrates products.

22. Case Law 9 — Aspen Skiing Co. v Aspen Highlands

472 U.S. 585 (1985)

Facts

A dominant ski operator discontinued cooperation with a smaller competitor after previously participating in joint ticket arrangements.

Principle

The Supreme Court found the particular refusal-to-deal conduct unlawful under Section 2.

Compliance lesson

A dominant platform should document legitimate reasons for significant decisions to:

terminate access;

discontinue interoperability;

end partnerships;

change API access;

terminate business relationships.

The documentation should reflect the actual contemporaneous business rationale.

23. Case Law 10 — Verizon v Trinko and Aspen Together

These two cases demonstrate an important compliance principle.

Aspen Skiing

Exceptional refusal to deal can produce Section 2 liability.

Trinko

Antitrust law generally does not impose a broad obligation on monopolists to cooperate with competitors.

Therefore:

Refusal to deal is neither automatically lawful nor automatically unlawful.

A compliance officer should escalate unusual access decisions for legal analysis rather than applying a simple rule.

24. Competition Compliance and Self-Preferencing

A large platform should establish a specific self-preferencing review mechanism.

For example:

Platform

Marketplace

Platform-owned business

Retail division

Risk

The marketplace algorithm gives platform-owned products:

higher rankings;

better recommendations;

lower commissions;

better search visibility;

privileged data;

faster access to customers.

The compliance officer should investigate:

Objective justification + market power + discriminatory treatment + foreclosure capability + actual/potential effects.

Google Shopping provides an important EU precedent.

25. Competition Compliance and Data

Data creates several potential competition issues.

1. Data access

Who can access platform data?

2. Data advantage

Does the platform obtain information unavailable to competitors?

3. Data combination

Can data from different services be combined?

4. Data portability

Can users/businesses move data to competitors?

5. Data exclusion

Can competitors obtain sufficient information to compete?

6. Competitor monitoring

Does the platform use business-user data to compete against those businesses?

The compliance officer should therefore work closely with:

privacy teams;

cybersecurity teams;

product teams;

data-governance teams.

26. Competition Compliance and AI

Large platforms increasingly use AI for:

recommendations;

search;

pricing;

advertising;

ranking;

fraud detection;

content moderation;

customer service.

A Competition Compliance Officer should require an AI competition impact assessment for high-risk systems.

Questions should include:

Does the algorithm favour the platform's own products?

Does it disadvantage particular competitors?

Does it use competitors' confidential data?

Could it facilitate coordination?

Does it create artificial switching costs?

Does it restrict interoperability?

Can the company explain material ranking decisions?

Are the results tested for discriminatory effects?

27. Competition Compliance and Information Exchange

Employees should be trained not to exchange competitively sensitive information with competitors.

Examples:

future prices;

future capacity;

strategic plans;

customer allocation;

production plans;

bidding strategies.

This is especially important for platform companies because employees may interact with competitors through:

industry associations;

APIs;

data exchanges;

joint ventures;

standard-setting organisations;

conferences.

28. Internal Competition Compliance Committee

A large platform may establish a cross-functional committee consisting of:

Competition Compliance Officer;

antitrust counsel;

product representatives;

economics team;

data scientists;

engineering representatives;

M&A team;

compliance/audit team.

The committee can review high-risk projects before deployment.

29. Three-Level Risk Classification

A practical system can classify activities as:

Level 1 — Low risk

Examples:

ordinary price reductions;

ordinary product improvements;

non-exclusive commercial terms.

Level 2 — Medium risk

Examples:

significant rebate programmes;

platform rule changes;

new data-sharing arrangements;

API modifications.

Level 3 — High risk

Examples:

competitor exclusion;

self-preferencing;

exclusivity;

major acquisitions;

interoperability restrictions;

refusal to provide critical access;

tying;

algorithmic pricing involving competitor data.

High-risk conduct should require specialist legal approval.

30. Whistleblowing and Internal Reporting

Employees should have confidential channels to report:

suspected price coordination;

competitor communications;

improper data use;

ranking manipulation;

exclusionary instructions;

suspicious contract terms.

The compliance officer should have authority to escalate credible reports.

31. Investigation Obligations

When a potential competition issue is identified, the officer should:

Step 1

Preserve relevant evidence.

Step 2

Identify the conduct.

Step 3

Identify affected markets.

Step 4

Determine the company's market position.

Step 5

Assess possible competitive effects.

Step 6

Obtain appropriate economic/legal analysis.

Step 7

Determine whether immediate mitigation is necessary.

Step 8

Document the investigation.

Step 9

Implement remediation.

Step 10

Monitor the result.

32. Regulatory Cooperation

A large platform may face competition authorities in multiple jurisdictions.

Potential authorities include:

European Commission;

national competition authorities;

US Department of Justice;

Federal Trade Commission;

UK Competition and Markets Authority;

other national regulators.

The compliance officer should maintain:

regulatory correspondence;

dawn-raid procedures;

document preservation protocols;

response teams;

employee guidance.

33. Dawn Raid / Investigation Preparedness

Large platforms should have procedures covering:

reception/security;

legal notification;

document preservation;

employee instructions;

IT systems;

privileged materials;

regulator access;

communication protocols.

Employees should never:

destroy documents;

alter records;

hide evidence;

mislead investigators.

34. Monitoring Remedial Commitments

If a platform has accepted:

commitments;

behavioural remedies;

interoperability obligations;

access obligations;

monitoring requirements,

the Competition Compliance Officer should monitor continuing compliance.

A compliance programme should therefore not end after regulatory settlement.

35. Independence of the Compliance Function

An effective compliance function should have sufficient independence from commercial teams.

For example:

Bad structure

Sales director → Competition Compliance Officer

where the officer's performance is heavily dependent upon sales targets.

Better governance

Compliance officer → senior compliance/legal governance structure

with independent escalation rights.

The objective is to allow the officer to raise concerns even when compliance advice may delay a profitable product launch.

36. Competition Compliance Audit

Regular audits should examine:

Contracts

exclusivity;

MFNs;

rebates;

tying.

Algorithms

ranking;

pricing;

recommendations.

Data

competitor information;

seller information;

access controls.

M&A

competitor acquisitions.

Employees

training;

communications.

Governance

approval records;

escalation procedures.

37. Key Distinction: Compliance vs Business Decision

The Competition Compliance Officer should not become the person who makes every commercial decision.

The proper role is generally:

identify legal risk + provide analysis + establish controls + escalate + monitor compliance.

Business management remains responsible for legitimate commercial strategy.

38. Major Challenges for Large Platforms

1. Rapid technological change

AI and algorithms may change faster than compliance policies.

2. Global operations

Different jurisdictions apply different standards.

3. Multi-sided markets

A platform may affect:

consumers;

sellers;

advertisers;

developers;

suppliers simultaneously.

4. Data complexity

Millions of transactions may make individual competitive effects difficult to identify.

5. Ecosystem effects

Conduct in one market may reinforce power in another.

6. Automated decision-making

Employees may not know precisely how algorithms reach particular outcomes.

39. Seven Core Duties for Exam Purposes

Remember:

M-A-R-C-H-E-D

M — Monitor market power

A — Assess anticompetitive agreements

R — Review platform rules and algorithms

C — Control competitively sensitive information

H — Handle investigations and complaints

E — Educate employees

D — Document and remediate

40. Model Competition Compliance Framework

              LARGE PLATFORM                    │                    ▼          Market-Power Assessment                    │                    ▼           Competition Risk Map                    │       ┌────────────┼────────────┐       ▼            ▼            ▼   Contracts     Algorithms      Data       │            │            │       └────────────┼────────────┘                    ▼            Competition Review                    │                    ▼             Risk Classification                    │             ┌──────┴──────┐             ▼             ▼           Low           High             │             │        Routine       Legal/Economic        approval         review                           │                           ▼                     Senior Escalation                           │                           ▼                    Remediation                           │                           ▼                    Continuous Audit

41. Case-Law-Based Compliance Lessons

42. Important Legal Distinctions

A compliance officer should avoid these incorrect assumptions:

Large platform = illegal

Incorrect.

Market power alone is not necessarily unlawful.

Self-preferencing = automatically illegal

Incorrect.

The legal analysis depends on the applicable jurisdiction, market position, conduct and competitive effects.

Data advantage = abuse

Incorrect.

Data advantage may contribute to market power or competitive effects, but it does not automatically establish infringement.

Refusal to deal = illegal

Incorrect.

Both EU and US law apply important limitations and contextual tests.

Algorithm = neutral

Incorrect.

Algorithms can create competition risks depending on their design, inputs and effects.

Compliance programme = immunity

Incorrect.

A compliance programme does not immunize a company from competition liability.

43. Conclusion

The Competition Compliance Officer in a large platform should function as a competition-risk governance mechanism, particularly where the company possesses substantial market power or operates an important digital ecosystem.

The central responsibilities are:

Monitor market power → identify risky conduct → review contracts and algorithms → control sensitive information → train employees → investigate complaints → document decisions → escalate serious risks → remediate violations → continuously audit.

The major cases demonstrate why these duties matter:

United Brands → dominance and discrimination;

Hoffmann-La Roche → loyalty/exclusivity;

Microsoft → interoperability and ecosystem power;

Intel → economically informed rebate analysis;

Google Shopping → self-preferencing;

Google Android → ecosystem restrictions;

Aspen Skiing → exceptional refusal-to-deal concerns;

Trinko → limits of refusal-to-deal liability.

Thus, for a large platform, competition compliance should not be treated merely as a legal review performed after a problem arises. It should be integrated into product design, algorithm governance, contracting, data governance, M&A, employee training and strategic decision-making.

Ultra-short revision formula

Large Platform + Market Power + Platform Gatekeeping → Continuous Competition Monitoring

Compliance Officer = Identify + Prevent + Monitor + Investigate + Escalate + Remediate + Document

Keywords

Competition Compliance – Dominance – Monopoly Power – Article 102 – Sherman Act §2 – Platform Governance – Self-Preferencing – Algorithmic Competition – Data Governance – Tying – Bundling – Exclusivity – Loyalty Rebates – Refusal to Deal – Interoperability – Information Exchange – M&A – Market Power – Foreclosure – Competition Audit – Compliance Training – Regulatory Investigation – Digital Ecosystems.