Contact details taken from the vendor's own site on 26 August 2026. Nothing here is guessed; a blank field means we did not find one.
Siman Systems is listed in the Buyside Fintech directory with 1 product. The company is based in London, United Kingdom and is owned by Hazeltree. Its products are listed under collateral and margin and treasury and cash. That product is Margin & Cost Optimization (MaCO). Every fact on this page carries the source we read and the date we checked it, and the profile has not been claimed by Siman Systems. Practitioners at firms that use Siman Systems can review it here, and the company may reply to a review but may not write one.
How Siman Systems describes itself
Prime Brokerage Replication, Investor Capital Tool, Cash Reporting Tool, Form PF Reporting Tool.
Siman Systems’s own website, read 2026-08-30
Their words, not ours. We publish it so you can see how a company positions itself; it is not an assessment and nothing in it has been checked.
Siman Systems products
Margin & Cost Optimization (MaCO)
Replicates and optimises prime broker, OTC and exchange margin, with real-time cash reporting; the site states it is now part of Hazeltree Fund Services.
Confirmed on the vendor's own site · source · 2026-09-20
What practitioners say
Questions and notes