Upcoming S&P 500 additions
Funds must own every addition by the effective close; this register tracks the window. Data as of Aug 21, 2026.
32days
until the S&P 500 announcement. Nothing is pending right now.
Pencilled in for Dec 4, 2026, typical window
Pending entries
Announced, not yet effective
| No. | Stock | Days left | Since announced | Date effective | Date announced | Replaces |
|---|---|---|---|---|---|---|
| No entries pending as of Aug 21, 2026. New announcements are entered here automatically, with a countdown to the effective close. | ||||||
Most recent entries
Returns measured from the effective-date close
| No. | Stock | Run-up 30d | 1W | 1M | 3M | 6M | 1Y | Date effective |
|---|---|---|---|---|---|---|---|---|
| 028 | HOODRobinhood Markets | +18.0% | +3.4% | +10.2% | +18.6% | +28.8% | Not yet elapsed | Sep 22, 2025 |
| 026 | APPAppLovin | +55.7% | +2.8% | +10.1% | +17.4% | +26.6% | Not yet elapsed | Sep 22, 2025 |
| 027 | EMEEMCOR Group | +14.3% | +0.8% | +3.1% | +6.3% | +9.4% | Not yet elapsed | Sep 22, 2025 |
| 025 | IBKRInteractive Brokers Group | +6.9% | +1.6% | +6.5% | +12.9% | +19.4% | Not yet elapsed | Aug 28, 2025 |
| 024 | XYZBlock, Inc. | +30.0% | -2.6% | -7.7% | +2.6% | +9.0% | +17.9% | Jul 23, 2025 |
| 023 | DDOGDatadog | +34.8% | -3.2% | -6.5% | +6.5% | +16.1% | +22.6% | Jul 9, 2025 |
| 022 | COINCoinbase Global | +28.8% | -2.3% | -5.3% | +17.4% | +13.6% | +28.8% | May 19, 2025 |
| 019 | EXEExpand Energy | +10.2% | -1.9% | +3.7% | -3.7% | -14.8% | -18.5% | Mar 24, 2025 |
| 018 | DASHDoorDash | -8.7% | -1.1% | +3.9% | +23.6% | +37.6% | +18.0% | Mar 24, 2025 |
| 020 | TKOTKO Group Holdings | +8.4% | -3.0% | +2.4% | +10.1% | +16.1% | +10.1% | Mar 24, 2025 |
Losses are entered in red. A blank cell means that window hasn't elapsed yet.
About the S&P 500
S&P Dow Jones Indices maintains the S&P 500 through an index committee rather than simply taking the 500 biggest stocks. Candidates must be US companies with sufficient float, liquidity and market value, and meet an earnings test covering the latest quarter and the last four quarters together. Passing those screens makes a company eligible, not certain to enter: the committee also considers how the index represents the US large-cap market.
The index is rebalanced quarterly in March, June, September and December, but replacements can also follow mergers, spin-offs and other corporate events between reviews. Scheduled changes commonly take effect after the close on a third Friday; ad hoc additions may be announced only days ahead. The published effective date, not an assumed notice period, is the date used in this register.
SPY, IVV and VOO are major funds following this benchmark. Their large combined footprint makes an addition closely watched, but a new member's price can move well before the funds rebalance. A pre-inclusion rise is therefore not the same thing as a gain after entry; compare both periods, and the stock's return against the index, in the records below.
What usually happens after the bell
Across 28 tracked S&P 500 additions
| Window after close | Average | Median | Finished higher | vs S&P 500 |
|---|---|---|---|---|
| 1W | +0.2% | +0.3% | 50% | 0.0% |
| 1M | +0.5% | +2.2% | 54% | -0.1% |
| 3M | +7.3% | +5.2% | 57% | +2.7% |
| 6M | +14.8% | +13.4% | 64% | +7.1% |
| 1Y | +27.6% | +11.6% | 63% | +11.3% |
| Run-up, 30 days before the close | +20.5% | Average move into past inclusions | ||
How S&P 500 additions work
S&P rebalances quarterly, effective after the close on the third Friday of March, June, September and December. Constituent changes (M&A, market-cap moves) are also announced ad hoc with ~1–5 days notice. A change is announced first and only takes effect after the close on the effective date. Between those two dates, every fund tracking the index (SPY, IVV, VOO) has to buy the incoming stock, which is why the window matters to traders.
Of the 28 S&P 500 additions with a recorded announcement date, the median notice between the announcement and the effective close is 17 days.
What happens to a stock after it joins S&P 500
Inclusion is often described as a guaranteed pop. The tracked history is more mixed: the average stock ran up +20.5% in the 30 days into the effective close, then returned +0.2% in the first week (50% of additions were positive), +0.5% after one month, and +27.6% after a year. Returns are measured from the effective close and can also be viewed against the index itself, so a rising market doesn't get counted as an inclusion effect.
Best one-year outcome in this set: PLTR (Palantir Technologies) at +302.8%. Worst: SMCI (Super Micro Computer) at -58.0%.
When are S&P 500 changes announced?
Quarterly rebalance (Mar / Jun / Sep / Dec) + ad hoc changes. Scheduled review, announcement and effective dates for the next twelve months are listed on the index review calendar. Ad hoc changes — a takeover, a bankruptcy, a fast-track promotion — are announced outside that schedule, usually with a few days' notice.
Most recent S&P 500 additions
- HOOD — Robinhood Markets joined the S&P 500 on Sep 22, 2025, replacing Caesars Entertainment.
- APP — AppLovin joined the S&P 500 on Sep 22, 2025, replacing MarketAxess Holdings.
- EME — EMCOR Group joined the S&P 500 on Sep 22, 2025, replacing Enphase Energy.
- IBKR — Interactive Brokers Group joined the S&P 500 on Aug 28, 2025, replacing Walgreens Boots Alliance.
- XYZ — Block, Inc. joined the S&P 500 on Jul 23, 2025, replacing Hess.