Upcoming Nasdaq-100 additions
Funds must own every addition by the effective close; this register tracks the window. Data as of Aug 21, 2026.
14days
until RBLX (Roblox) joins at the close
Effective 04 SEPT 2026
Pending entries
1 announced, not yet effective
| No. | Stock | Days left | Since announced | Date effective | Date announced | Replaces |
|---|---|---|---|---|---|---|
| 015 | RBLXRobloxAnnounced but not yet effective as of the dataset date. | 14 | — | 04 SEPT 2026 | 14 AUG 2026 | Paccar |
Entered in the last 90 days
Returns measured from the effective-date close
| No. | Stock | Run-up 30d | 1W | 1M | 3M | 6M | 1Y | Date effective |
|---|---|---|---|---|---|---|---|---|
| 014 | SNOWSnowflake | +10.2% | +1.5% | +6.7% | Not yet elapsed | Not yet elapsed | Not yet elapsed | Jun 22, 2026 |
Losses are entered in red. A blank cell means that window hasn't elapsed yet.
About the Nasdaq-100
Nasdaq selects the Nasdaq-100 largely by rules: it covers the largest eligible non-financial companies listed on the Nasdaq exchange, subject to listing history, liquidity and other methodology requirements. Unlike the S&P 500, it is not a committee's broad cross-section of the entire US economy. Technology and other growth businesses can make up a substantial part of the index, but a Nasdaq listing alone does not guarantee admission.
The main membership reset is the annual December reconstitution. Nasdaq announces the new lineup ahead of its effective date, normally after the close on the third Friday in December. Quarterly weight adjustments occur in March, June and September; they are not equivalent to a complete new membership selection. Corporate actions can still trigger replacements at other times of year.
QQQ and QQQM are prominent funds tracking the Nasdaq-100. When a name is added, these funds must reflect the revised basket, while traders may have reacted to the announcement earlier. Comparing the pre-close run-up with post-close results helps distinguish those windows. The comparison with the index itself matters especially here: a stock can rise after entry yet still trail a strongly performing Nasdaq-100.
What usually happens after the bell
Across 15 tracked Nasdaq-100 additions
| Window after close | Average | Median | Finished higher | vs Nasdaq-100 |
|---|---|---|---|---|
| 1W | -2.9% | -2.2% | 14% | -3.2% |
| 1M | -2.2% | +0.8% | 50% | -3.6% |
| 3M | -1.3% | +5.6% | 54% | -3.0% |
| 6M | +9.3% | +13.5% | 75% | +0.2% |
| 1Y | +3.6% | +4.4% | 56% | -17.0% |
| Run-up, 30 days before the close | +19.1% | Average move into past inclusions | ||
How Nasdaq-100 additions work
Nasdaq reconstitutes the index annually in December, effective after the close on the third Friday. Quarterly weight updates also take effect on the third Friday of March, June and September. 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 (QQQ, QQQM) has to buy the incoming stock, which is why the window matters to traders.
Of the 15 Nasdaq-100 additions with a recorded announcement date, the median notice between the announcement and the effective close is 10 days.
What happens to a stock after it joins Nasdaq-100
Inclusion is often described as a guaranteed pop. The tracked history is more mixed: the average stock ran up +19.1% in the 30 days into the effective close, then returned -2.9% in the first week (14% of additions were positive), -2.2% after one month, and +3.6% 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 +122.5%. Worst: TTD (The Trade Desk) at -61.7%.
When are Nasdaq-100 changes announced?
Annual reconstitution (December) + quarterly weight updates. 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.
Currently pending: RBLX (Nasdaq-100, effective Sep 4, 2026).
Open the index review calendar — pending now: RBLX.
Most recent Nasdaq-100 additions
- SNOW — Snowflake joined the Nasdaq-100 on Jun 22, 2026, replacing Zscaler.
- CRWV — CoreWeave joined the Nasdaq-100 on Mar 23, 2026, replacing Marvell Technology.
- COIN — Coinbase Global joined the Nasdaq-100 on Dec 22, 2025, replacing ON Semiconductor.
- HOOD — Robinhood Markets joined the Nasdaq-100 on Dec 22, 2025, replacing Biogen.
- APP — AppLovin joined the Nasdaq-100 on Dec 22, 2025, replacing GlobalFoundries.