Gapped up at the open (3%+)
A technical stock screen computed nightly from daily-close price history (market data). Selection is deterministic — a company appears only when its stored indicator meets the screen's rule; nothing is estimated.
183 companies in the catalog currently match this technical screen. Leading the list, ASPEN AEROGELS INC (ASPN) is opened 45.7% above the previous session's close (previous close 5.01), and had not traded back through it by the close.
| # | Company | Sector | Price | Signal |
|---|---|---|---|---|
| 1 | ASPEN AEROGELS INC (ASPN) | Materials | $6.89 | opened 45.7% above the previous session's close (previous close 5.01), and had not traded back through it by the close |
| 2 | IOVANCE BIOTHERAPEUTICS INC (IOVA) | Health Care | $6.21 | opened 37.2% above the previous session's close (previous close 4.34), and had not traded back through it by the close |
| 3 | EVOLENT HEALTH INC CLASS A (EVH) | Health Care | $3.59 | opened 32.5% above the previous session's close (previous close 3.08), and had not traded back through it by the close |
| 4 | AEVA TECHNOLOGIES INC (AEVA) | Information Technology | $25.26 | opened 31.6% above the previous session's close (previous close 19.61), and had not traded back through it by the close |
| 5 | Insmed (INSM) | Health Care | $132.55 | opened 29.5% above the previous session's close (previous close 99.02), and had not traded back through it by the close |
| 6 | THE HONEST COMPANY INC (HNST) | Consumer Staples | $5.42 | opened 26.9% above the previous session's close (previous close 3.85), and had not traded back through it by the close |
| 7 | SOUNDHOUND AI INC CLASS A (SOUN) | Information Technology | $7.08 | opened 25.1% above the previous session's close (previous close 6.43), and had not traded back through it by the close |
| 8 | Paycom (PAYC) | Information Technology | $215.97 | opened 21.8% above the previous session's close (previous close 174.8), and had not traded back through it by the close |
| 9 | ATN INTERNATIONAL INC (ATNI) | Communication Services | $30.63 | opened 20.7% above the previous session's close (previous close 24.01), and had not traded back through it by the close |
| 10 | CLOVER HEALTH INVESTMENTS CORP CLA (CLOV) | Health Care | $4.66 | opened 18.1% above the previous session's close (previous close 4.14), and had not traded back through it by the close |
| 11 | RTX Corporation (RTX) | Industrials | $223.25 | opened 17.7% above the previous session's close (previous close 190.5), and had not traded back through it by the close |
| 12 | ARHAUS INC CLASS A (ARHS) | Consumer Discretionary | $9.68 | opened 17.4% above the previous session's close (previous close 8.23), and had not traded back through it by the close |
| 13 | HERTZ GLOBAL HLDGS INC (HTZ) | Industrials | $2.02 | opened 16.7% above the previous session's close (previous close 1.56), and had not traded back through it by the close |
| 14 | Caris Life Sciences (CAI) | Health Care | $20.00 | opened 15.5% above the previous session's close (previous close 16.45), and had not traded back through it by the close |
| 15 | FORWARD AIR CORP (FWRD) | Industrials | $17.80 | opened 15.3% above the previous session's close (previous close 15.41), and had not traded back through it by the close |
| 16 | KRONOS WORLDWIDE INC (KRO) | Materials | $8.23 | opened 14.3% above the previous session's close (previous close 6.21), and had not traded back through it by the close |
| 17 | HERITAGE INSURANCE HOLDINGS INC (HRTG) | Financials | $35.21 | opened 14.3% above the previous session's close (previous close 30.23), and had not traded back through it by the close |
| 18 | REDWIRE CORP (RDW) | Industrials | $11.83 | opened 14.2% above the previous session's close (previous close 10.72), and had not traded back through it by the close |
| 19 | NN, Inc. (NNBR) | Industrials | $3.87 | opened 13.3% above the previous session's close (previous close 3.9), though it traded back through that level before the close |
| 20 | TRUPANION INC (TRUP) | Financials | $28.16 | opened 13.1% above the previous session's close (previous close 24.39), and had not traded back through it by the close |
| 21 | EVOLUS INC (EOLS) | Health Care | $7.41 | opened 13.1% above the previous session's close (previous close 6.18), and had not traded back through it by the close |
| 22 | Encompass Health (EHC) | Health Care | $124.82 | opened 12.5% above the previous session's close (previous close 110.9), and had not traded back through it by the close |
| 23 | MATIV HOLDINGS INC (MATV) | Materials | $11.68 | opened 12.2% above the previous session's close (previous close 9.57), and had not traded back through it by the close |
| 24 | TUTOR PERINI CORP (TPC) | Industrials | $95.77 | opened 12.2% above the previous session's close (previous close 84.55), and had not traded back through it by the close |
| 25 | ARRAY TECHNOLOGIES INC (ARRY) | Industrials | $5.25 | opened 12.1% above the previous session's close (previous close 5.64), though it traded back through that level before the close |
Ask about these stocks in plain English →
Today's movers → · Browse all stocks → · Compare ASPN vs IOVA →
What is a gap up?
A "gap" is the part of a move that happens while the market is shut. The overnight gap is simply the opening price measured against the previous session's closing price: if a company closes at 100 and opens at 105, it gapped up 5%, and no trade happened anywhere in between. Gaps are usually the market repricing something that was announced out of hours — results, a trial readout, a bid — which is why they cluster around earnings dates rather than appearing at random.
How do I read the Gapped up at the open (3%+) screen?
This screen lists companies whose most recent session opened at least 3% above the previous close, largest gap first, and says whether price traded back down through that previous close before the session ended. That second fact matters more than it looks: measured across our catalog, about a third of gaps of 2% or more are closed again during the very session that opened them. A gap describes a session that has already opened. It is not a signal, it says nothing about the next session, and nothing here is advice.
New to this? What is Price gaps (gap up, gap down, and filling a gap)? →
Data: daily-close price history, recomputed nightly. Every figure is shown with its as-of date on the company page; a company without enough price history for this indicator is excluded, never estimated.
33 covered companies were not evaluated for this screen because their price series end on or before 2026-07-28 (AKTS, ANGX, CBC, CCRN, CPRX, ECHO, EEX, ESPR, FJET, FLY, FRMI, GEMI, and 21 more), at least 7 trading sessions behind the 2026-08-06 session the rest of the catalog carries. A technical signal is a claim about the present, so it is not asserted from a series that stops before it. Those companies keep the readings they have on their own page, with the as-of date they were computed from.
Last updated 2026-08-06 — this screen recomputes nightly from daily-close prices, so its members change over time.
Informational only — NOT financial advice. Technical indicators describe past price behavior; they are not predictions. All figures are delayed daily-close data.