Case Study

Scaling sales performance through the global financial crisis and towards a $100m+ sale | City Index

Oliver Williamson

 ·

7 min read

Published:

July 1, 2026

Last update:

July 1, 2026

Get Strategies

Get actionable strategies every Week

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Company
City Index: financial trading business serving private and institutional clients
Oliver's role progression
Sales Associate → Head of Customer Retention → Head of Sales UK → Global Head of Sales
Starting point
Joined in 2007 on the London trading floor, during the early stages of the global financial crisis
Commercial scope
Private client activation, retention, UK sales, institutional partnerships and global sales teams
Outcome
UK sales moved from EBITDA-neutral to ~£5m positive EBITDA; global sales reached ~£20m positive EBITDA
Headline metrics
Retention up ~20% within 18 months; conversion increased from ~25% to ~50%; business sold for over $100m

Overview

Oliver joined City Index in 2007 as a Sales Associate on the London trading floor, just as the global financial crisis was beginning to unfold. It was his first exposure to financial markets and a baptism of fire: within months, market volatility and uncertainty had intensified dramatically.

Oliver progressed from Sales Associate to Head of Customer Retention, then Head of Sales UK and finally Global Head of Sales. His remit widened from activating private-client accounts to running sales teams, building retention, overseeing institutional partnerships and replicating the UK model internationally.

The challenge

City Index won account openings, but the value only came from converting those accounts into active traders and keeping them. Oliver’s first role tackled activation: getting private clients who had opened accounts to actually start trading.

As his remit grew, so did the problem. The business needed better retention, a stronger sales structure, clearer KPIs, sharper incentives and a consistent way to lift performance across teams and markets.

The backdrop made it harder. The financial crisis meant volatile markets, nervous customers and relentless pressure on the floor.

What Oliver did

Led from the front, then built the retention function

Oliver started by becoming the top salesperson on the floor. That earned him a mandate to build a new retention team. Treating retention as a discipline rather than an afterthought, he built a dedicated team to keep and grow existing customers, and lifted retention by about 20% within 18 months.

Rebuilt UK sales structure and incentives

As Head of Sales UK, Oliver owned both activation and retention. He set clearer KPIs, segmented responsibilities, improved training, and rebuilt incentives to align salesperson behaviour with business outcomes.

Expanded into institutional partnerships

His remit expanded into institutional business development, working with major partners including Barclays, Halifax, TD Waterhouse, Selftrade and Interactive Investor.

Scaled the model globally

As Global Head of Sales, Oliver took on teams in Australia, Singapore, China, Poland, the UAE and the US, with a mandate to replicate the UK model across markets.

The Results

25% 50%
account-opening conversion
+~20%
retention, within 18 months
$100m+
eventual sale of the business

Conversion rose from around 25% of account openings to around 50%, transforming the unit economics of acquisition. Retention improved by about 20% within 18 months of Oliver taking over the function.

UK sales moved from roughly EBITDA-neutral to around £5m positive EBITDA, and globally the sales organisation reached around £20m positive EBITDA. The business was later sold for over $100m.

Conversion from around 25% to around 50%. UK sales from break-even to about £5m EBITDA. A business sold for over $100m.

Why it mattered

Oliver built and scaled sales leadership in about as demanding a market as exists. He did not just manage a team. He improved conversion, retention, incentives, training and structure, then exported that model internationally.

It is a clear arc from individual-contributor excellence to UK leadership to global sales leadership, with measurable gains in conversion, retention and EBITDA.

The takeaway

From top salesperson to global sales leader: improving conversion, retention and profitability under crisis-level pressure, then scaling the playbook internationally.

Heading 1

Heading 2

Heading 3

Heading 4

Heading 5
Heading 6

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Worried your domains are already burned? Reply and we’ll run a free placement test and tell you exactly where you stand. No form, no pitch, just the diagnosis.

Diagram of spam recovery steps: Stop campaigns, test email health, then deliver after near-perfect placement.

Ordered list

  1. Item 1
  2. Item 2
  3. Item 3

Unordered list

  • Item A
  • Item B
  • Item C

Text link

Bold text

Emphasis

Superscript

Subscript