---
title: "What is an allocation in LUSID?"
slug: "what-is-an-allocation-in-lusid"
updated: 2025-04-10T15:06:41Z
published: 2025-04-10T15:06:41Z
canonical: "support.lusid.com/what-is-an-allocation-in-lusid"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://support.lusid.com/llms.txt
> Use this file to discover all available pages before exploring further.

# What is an allocation in LUSID?

An allocation in LUSID represents the distribution of [fills in an execution](/v1/docs/what-is-an-execution-in-lusid) to one or more orders that form the [block](/v1/docs/what-is-order-blocking-in-lusid) that was placed.

For example, as a Portfolio Manager, you might have previously created two orders for two different portfolios, which a Trader has placed: one order for 100 AAPL US equity shares and a second order for 150 AAPL US equity shares. Having received fills for all 250 shares, LUSID allocates 40% of the shares to Portfolio A and 60% to Portfolio B.

![](https://cdn.document360.io/d575ad81-c0ed-4980-bbd1-d59ac5c3de82/Images/Documentation/image(711).png?sv=2026-02-06&spr=https&st=2026-10-12T06%3A24%3A24Z&se=2026-10-12T07%3A24%3A24Z&sr=c&sp=r&sig=rBhYkLwbU3JCSHFglKqKlpQ%2B1Z584M4MV7J6bIqpOHY%3D)

Allocations are continuously updated as LUSID receives executions. Fills can be allocated before a placement is 100% executed.

You can automatically allocate executions to your portfolios using two methods:

- Based on the number of executions received back against the placements made.
- Using more complex allocation algorithms. [Read more on using LUSID's allocation algorithms.](/v1/docs/allocating-fills-automatically-using-allocation-algorithms)

Once one or more executions are allocated to a portfolio, the allocation can be booked as (that is, converted into) a transaction at any time. You can automate transaction booking in a way that suits you, such as booking transactions at market close, or when an order reaches 100% filled.

[See how to allocate executions.](/v1/docs/how-do-i-allocate-blocks)