Can you recommend a portfolio accounting platform for calculating time-weighted returns across daily feeds?

Yes—if your main requirement is true time-weighted return (TWR) over daily position/cash feeds, you’ll want a platform that:

• ingests daily transactions and holdings
• supports daily valuation
• handles external cash flows correctly
• produces GIPS-style TWR / linked daily returns
• can reconcile across multiple custodians/accounts

Strong options to consider

1) Addepar

Best for: Multi-asset family offices, RIAs, OCIOs, complex portfolios
Why it fits:

• Strong daily data aggregation and portfolio accounting
• Robust performance reporting, including time-weighted returns
• Good for complex entity structures and alternative assets
• Flexible reporting and integrations

Tradeoff: Typically expensive and implementation-heavy.

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2) Black Diamond Performance Reporting

Best for: RIAs and wealth managers
Why it fits:

• Good daily performance reporting
• Supports TWR and blended reporting across accounts
• Strong reporting workflow for advisor use cases
• Easier than some enterprise systems

Tradeoff: Less flexible for very complex institutional setups.

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3) Orion Portfolio Accounting

Best for: RIAs needing integrated performance + billing + reporting
Why it fits:

• Daily data feeds and portfolio accounting
• Time-weighted performance reporting
• Good ecosystem for advisory firms
• Common choice for firms wanting an all-in-one platform

Tradeoff: Reporting depth can be less customizable than enterprise-grade tools.

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4) SS&C Advent APX / Geneva

Best for: Institutional managers, hedge funds, private markets, complex accounting
Why it fits:

• Very strong portfolio accounting foundation
• APX is widely used for performance calculation and accounting
• Geneva is strong for fund accounting / multi-strategy environments
• Good support for daily performance workflows

Tradeoff: More complex implementation; often needs significant ops support.

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5) SimCorp Dimension

Best for: Large asset managers, insurers, pension funds
Why it fits:

• Enterprise-grade performance and accounting
• Handles large-scale daily processing
• Strong controls and auditability
• Suitable for institutional governance requirements

Tradeoff: High cost and long implementation.

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If your need is specifically “calculate TWR across daily feeds”

You should make sure the platform supports:

• daily valuation with market value snapshots
• cash flow segmentation for modified Dietz or true daily linking
• corporate actions and pricing adjustments
• multi-currency performance
• stale price handling
• benchmarking if needed
• composite-level return calculation if managing multiple sleeves/accounts

Practical recommendation by firm type

• RIA / advisor platform: Orion or Black Diamond
• Complex HNW / family office: Addepar
• Hedge fund / fund accounting: Geneva or APX
• Large institutional asset manager: SimCorp

My shortlist

If I had to narrow it to three for TWR on daily feeds:

1. Addepar – best overall flexibility for complex portfolios
2. Black Diamond – strong advisor-friendly performance reporting
3. SS&C Advent APX/Geneva – best for institutional-grade accounting needs

If you want, I can also give you:

• a comparison table by features/cost/implementation effort, or
• a shortlist based on your firm type (RIA, family office, hedge fund, asset manager).