FTSE Russell, the global index provider, today confirms the schedule for the Reconstitution of the Russell US Indexes, set to occur at the end of June 2026.
This rebalancing process is designed to capture market shifts from the previous year to ensure the Russell US Indexes continue to accurately reflect the US equity market.
The 2026 Russell Reconstitution schedule is as follows:
- Thursday 30th April – “Rank Day” – Index membership eligibility for 2026 Russell Reconstitution determined from constituent market capitalization at market close.
- Friday 22nd May – Preliminary index additions & deletions membership lists posted to the website after 6 PM US eastern time.
- Friday 29th May, 5th June, 12th June and Thursday 18th June – Preliminary membership lists (reflecting any updates) posted to the website after 6 PM US eastern time.
- Monday 8th June – “Lock-down” period begins with the updates to reconstitution membership considered to be final.
- Friday 26th June – Russell Reconstitution is final after the close of the US equity markets.
- Monday 29th June – Equity markets open with the newly reconstituted Russell US Indexes.
Catherine Yoshimoto, Director, Product Management, FTSE Russell, said:
“Each year’s reconstitution captures shifts in company size and market leadership across the US equity universe, ensuring the Russell US Indexes continue to reflect the market’s evolving landscape. Our transparent, rules-based approach enables investors to prepare for these index changes with confidence, even as the rebalance culminates in one of the highest trading volume days of the year. The significant trading activity surrounding Russell Reconstitution underscores the scale of assets benchmarked to these indexes and the trust investors place in them worldwide.”
On 20th February 2026, FTSE Russell announced the 1Q2026 preliminary list of IPO additions, which will take effect at the market open of 23rd March. As of 1Q2026, there are two preliminary additions to the large cap Russell 1000 Index and nine additions to the small cap Russell 2000 Index, which encompass the 11 additions to the Russell 3000 Index. There will also be seven IPOs added to the Russell Microcap Index.
The reconstitution and quarterly IPO additions provide an important foundation for FTSE Russell’s widely used Russell US Indexes. These governance processes are designed to ensure the indexes remain a current and relevant measure of US equity market performance.
Although previously rebalanced on an annual basis, effective this year, the reconstitution of the Russell US Indexes will be held semi-annually in June and December. This decision is based on data analysis and follows a market consultation undertaken in response to the evolution of market dynamics. More on the Russell US Indexes moving to a semi-annual reconstitution this year can be found on the FTSE Russell website.
Visit here for more information on the Russell US Indexes. More information and background on the rebalancing process can be found on the Russell Reconstitution resource hub.
