Regulatory Reporting

The compliance stack generates regulatory reports required by US, EU, and UK financial authorities.

US Reporting

Report	Authority	Frequency	Description
OATS	FINRA	Real-time	Order Audit Trail System -- every order event
CAT	SEC/FINRA	T+1	Consolidated Audit Trail -- all order lifecycle events
ATS-N	SEC	Quarterly	Form ATS-N -- ATS operations and conflicts disclosure
CTR	FinCEN	Per event	Currency Transaction Report for transactions over $10,000
SAR	FinCEN	Per event	Suspicious Activity Report within 30 days of detection

EU/UK Reporting

Report	Authority	Frequency	Description
MiFID II Transaction	ESMA/NCA	T+1	Transaction reports for all executed orders
FCA Reports	FCA	Periodic	UK regulatory returns under 5AMLD

CTR Filing

Currency Transaction Reports are triggered automatically when a single transaction or aggregate daily transactions exceed $10,000:

Transaction ──► Amount Check ──► Over $10,000?
                                     │
                              ┌──────┴──────┐
                              ▼             ▼
                           File CTR       No action
                           (FinCEN)

The pkg/payments package detects CTR threshold crossings for both single transactions and daily aggregates.

SAR Filing

Suspicious Activity Reports are filed when the surveillance system escalates an alert:

Filing deadline: 30 calendar days from detection
No notification to the subject (tipping off is prohibited)
Retention: 5 years from filing date

Travel Rule (FATF Rec 16)

For transfers exceeding $3,000, originator and beneficiary information must accompany the transaction:

Field	Required
Originator name	Yes
Originator account	Yes
Originator address or national ID	Yes
Beneficiary name	Yes
Beneficiary account	Yes

Entity Types

The pkg/entity package defines compliance requirements per regulated entity type:

Entity	Registration	Net Capital
ATS	SEC Reg ATS, Form ATS-N	$250,000
Broker-Dealer	SEC/FINRA/SIPC, Rule 15c3-1	$250,000
Transfer Agent	SEC Rule 17Ad, Form TA-1/TA-2	--
MSB	FinCEN registration, state MTLs	Varies by state