Why QSI rose 20.2% on Sep 29 2026: interim development results
QSI+20.2%on Tue Sep 29 2026
Quantum-Si Incorporated Class A Common Stock was up 20.2% on the day at $0.9557, ranked #3 on 68.0× its usual five-minute volume, when TapeRank recorded this spike at 10:39 ET during regular hours.
THE DAY ON THE LIST · 1 EVENT
- 10:39 ETMOVER · REGULAR
$0.9557 · ▲ 20.2% ON THE DAY · 68.0× 5M RVOL · RANK #3
JUSTIFIEDCONFIDENCE4/5Quantum-Si reported interim development results saying its Proteus platform significantly outperformed Platinum Pro across every key measure, with a planned second-quarter 2027 launch. The positive analyst reiteration and $4 target reinforce the move, although the announcement remains development-stage and lacks quantified commercial impact.
WHYA 20.8% gain on strong interim product results, backed by an analyst reiteration, is substantial but proportionate to a potentially meaningful platform-development update in a low-priced, heavily traded stock.ANALYZED 10:40 ET · <1 MIN AGO · OPENAI/GPT-5.6-LUNATHE ROW AND SESSION LEVELS AT 10:39 ET
LAST0.9557DAY▲ 20.2%5 MIN▲ 2.36%5M RVOL68.0×5M $VOL$723KFLOAT*198.9MRANK#3SESSIONREGULARVWAP0.9051HOD0.9450LOD0.8000OR HIGH0.8400OR LOW0.8050PREV CLOSE0.7950PM HIGH0.8300PM LOW0.8000GAP▲ 1.26%* FLOAT IS SHARES OUTSTANDING; TRUE FREE FLOAT IS NOT AVAILABLE
THE SESSION
- 09:30 ETOpened at $0.8050, +1.3% on the previous close of $0.7950
- 09:30 ETRegular-session low, $0.8050
- 12:06 ETRegular-session high, $1.03
- 15:59 ETLast trade of the regular session, $0.9687, +21.9% on the previous close of $0.7950
- Volume: 22.7M shares in regular hours, 76K before the open
QSI opened at $0.8050, its session low, then climbed to $1.03 by 12:06 ET before easing to $0.9687 at the regular-session close, up 21.9% from the previous close. TapeRank read the move as justified, linking it to interim development results showing Quantum-Si’s Proteus platform significantly outperformed Platinum Pro across every key measure, with a planned second-quarter 2027 launch, while also noting an analyst reiteration and $4 target; the update remained development-stage without quantified commercial impact. No halts occurred.
WRITTEN THU OCT 15 2026 18:46 ET BY OPENAI/GPT-5.6-LUNA FROM THE FACTS ON THIS PAGE
FILINGS AND NEWS · 24H BEFORE THE MOVE
- 06:21 ETHC Wainwright & Co. Reiterates Buy on Quantum-Si, Maintains $4 Price TargetBenzinga
- 04:23 ETReported Earlier, Quantum-Si's Proteus Significantly Outperforms Platinum Pro Across Every Key Measure In Interim Development Results Using 18-Amino-Acid Kit, Launch Expected In Second Quarter Of 2027Benzinga
- MON 16:29 ET8-K — Regulation FD Disclosure; Financial Statements and ExhibitsSEC 8-K
On the tape right now
WHERE THE LIST STOODWED NOV 4 2026 · 13:49 ETRECORDED LIVE · 742 QUALIFY
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