RBLX — upcoming Nasdaq-100 index addition
Roblox joins the Nasdaq-100 at the close on Sep 4, 2026, replacing Paccar.
14days to the effective close
- Register
- Nasdaq-100
- Date announced
- 14 AUG 2026
- Date effective
- 04 SEPT 2026
- Replaces
- Paccar
- Sector
- Communication Services
What happens next
The effective close is the baseline for every return on this page
| Date | Station | What gets entered |
|---|---|---|
| 04 SEPT 2026 | Effective close | Index funds tracking Nasdaq-100 buy their weight around this print. |
| Sep 11, 2026 | 1W | Return since the close, absolute and against Nasdaq-100. |
| Oct 4, 2026 | 1M | Return since the close, absolute and against Nasdaq-100. |
| Dec 3, 2026 | 3M | Return since the close, absolute and against Nasdaq-100. |
| Mar 3, 2027 | 6M | Return since the close, absolute and against Nasdaq-100. |
| Sep 4, 2027 | 1Y | Return since the close, absolute and against Nasdaq-100. |
Announced but not yet effective as of the dataset date.
Analysis
Recorded context for RBLX
Roblox (RBLX) is scheduled to enter the Nasdaq-100 at the close on Sep 4, 2026, replacing Paccar. The recorded announcement came 21 calendar days before the effective close, on Aug 14, 2026. The company is classified in Communication Services in this dataset.
The effective-date close is still ahead, so a pre-inclusion run-up and post-inclusion returns cannot yet be measured.
The 1M window ends on Oct 4, 2026; a result needs a usable close. The 3M window ends on Dec 3, 2026; a result needs a usable close. The 1Y window ends on Sep 4, 2027; a result needs a usable close. The other 1 Communication Services addition with a measured 1M return averaged +1.7%. This is historical context, not a projection.
How past Nasdaq-100 additions behaved
14 completed additions. Historical averages, not a forecast for RBLX.
| Past additions | 1W | 1M | 3M | 6M | 1Y |
|---|---|---|---|---|---|
| Average | -2.9% | -2.2% | -1.3% | +9.3% | +3.6% |
| Finished higher | 14% | 50% | 54% | 75% | 56% |
Prices last updated: unknown
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See every entry in the Nasdaq-100 additions log or the index review calendar.