Finance
FTSE Russell to Align Free-Float Rules for Uk, Foreign Firms
Published by Global Banking & Finance Review®
Posted on March 26, 2026
2 min readLast updated: March 26, 2026
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FTSE Russell will standardize the minimum free float requirement for all companies—UK and non‑UK—in its FTSE UK Index Series to 10%, effective from the June 2026 review, aligning with LSE rules and improving index representation.
FTSE Russell to Harmonize Free-Float Rules in UK Index Series by 2026
FTSE Russell Announces Alignment of Free-Float Requirements
Overview of the Upcoming Changes
March 26 (Reuters) - Index provider FTSE Russell said on Thursday it would align the minimum free-float requirement for UK and non-UK companies in the FTSE UK Index Series from the June 2026 review.
Details of the Free-Float Requirement
Under the change, companies incorporated inside or outside the UK will need at least 10% free float to qualify for inclusion in the FTSE UK Index Series. Non-UK companies currently face a 25% minimum free-float requirement.
Rationale Behind the Harmonization
FTSE Russell, a London Stock Exchange Group business, said the change removes the gap between UK and foreign companies and makes the indices better reflect real market exposure. The rule is also in line with the London Stock Exchange's minimum free-float requirement.
Expected Impact on Index Constituents
"While we do not expect any immediate impact on index constituents, this change aims to strengthen how accurately the indices reflect the UK market," David Sol, global head of policy at FTSE Russell, said in a statement.
Related Developments in Index Inclusion Rules
Proposed Fast-Entry Mechanism for IPOs
In February, FTSE Russell also proposed a "fast-entry" mechanism for IPOs and changes to eligibility criteria for its Russell U.S. Equity Indexes, as market expectations indicated some forthcoming listings may not meet the current thresholds.
Peer Initiatives: Nasdaq's New Rule Proposal
Peer Nasdaq also proposed a new rule last month to speed up the inclusion of newly listed large companies in its index, seeking to address delays that have left major IPOs and exchange transfers out of the benchmark for months.
(Reporting by Aatrayee Chatterjee in Bengaluru; Editing by Shailesh Kuber and Maju Samuel)
Key Takeaways
- •From June 2026, both UK and non‑UK firms need a minimum 10% free float for FTSE UK Index inclusion.
- •Non‑UK firms’ prior 25% threshold is being lowered, with no immediate index effect as none currently fail that test.
- •The change aligns methodology across indices and supports clarity, consistency and UK market competitiveness, with industry bodies backing phased implementation.
Frequently Asked Questions about FTSE Russell to align free-float rules for UK, foreign firms
1What change did FTSE Russell announce for the FTSE UK Index Series?
FTSE Russell will align the minimum free-float requirement to 10% for both UK and non-UK companies from June 2026.
2When will the new free-float rule take effect?
The updated minimum free-float rule applies from the June 2026 review.
3How does this change affect current index constituents?
FTSE Russell does not expect any immediate impact on existing index constituents due to this change.
4How does the new rule compare to the previous requirement for non-UK companies?
Previously, non-UK companies needed a 25% minimum free float, which is now reduced to 10% to match UK firms.
5Why is FTSE Russell implementing this change?
The change aims to remove gaps between UK and foreign firms and better reflect the real market exposure in the indices.
