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UNEXPLAINED MOVE · TUE OCT 27 2026

KRRO up 15.6% on Oct 27 2026 with no filing that explains it

KRRO+15.6%on Tue Oct 27 2026

Korro Bio, Inc. Common Stock was up 15.6% on the day at $13.89, ranked #4 on 34.0× its usual five-minute volume, when TapeRank recorded this unexplained move at 12:06 ET during regular hours.

THE DAY ON THE LIST · 1 EVENT

  1. 12:06 ET
    UNEXPLAINED MOVE · REGULAR

    $13.89 · ▲ 15.6% ON THE DAY · 34.0× 5M RVOL · RANK #4

    UNEXPLAINEDCONFIDENCE4/5

    KRRO is up 15.6% with a fresh 1.83% five-minute acceleration and volume running 31.5 times normal. The only supplied item is a shareholder purchase of 79,809 shares at $11.09, which does not provide a fundamental catalyst sufficient to explain this move.

    WHYA 15.6% move and extreme volume are materially larger than the informational value of a disclosed shareholder purchase, so order flow is driving the move.
    ANALYZED 12:06 ET · <1 MIN AGO · OPENAI/GPT-5.6-LUNA
    THE ROW AND SESSION LEVELS AT 12:06 ET
    LAST13.89
    DAY▲ 15.6%
    5 MIN▲ 1.83%
    5M RVOL34.0×
    5M $VOL$345K
    FLOAT*14.7M
    RANK#4
    SESSIONREGULAR
    VWAP13.17
    HOD13.95
    LOD12.41
    OR HIGH13.19
    OR LOW12.62
    PREV CLOSE12.02
    PM HIGH12.78
    PM LOW12.47
    GAP▲ 5.91%

    * FLOAT IS SHARES OUTSTANDING; TRUE FREE FLOAT IS NOT AVAILABLE

THE SESSION

  • 09:30 ETOpened at $12.73, +5.9% on the previous close of $12.02
  • 09:35 ETRegular-session low, $12.41
  • 12:05 ETRegular-session high, $13.95
  • 15:59 ETLast trade of the regular session, $13.33, +10.9% on the previous close of $12.02
  • Volume: 275K shares in regular hours, 977 before the open

KRRO opened at $12.73, briefly slipped to $12.41, then climbed through the morning to reach $13.95 at 12:05 ET before easing to $13.33 by the regular-session close. TapeRank recorded the stock at $13.89 at 12:06 ET and found the move unexplained; the only supplied filing was an insider transaction reporting a shareholder purchase of 79,809 shares at $11.09, which TapeRank read as insufficient to explain the sharp move and elevated volume. There were no halts, and the stock finished 10.9% above the previous close.

WRITTEN TUE OCT 27 2026 16:00 ET BY OPENAI/GPT-5.6-LUNA FROM THE FACTS ON THIS PAGE

FILINGS AND NEWS · 24H BEFORE THE MOVE

On the tape right now

WHERE THE LIST STOODWED NOV 4 2026 · 13:49 ETRECORDED LIVE · 742 QUALIFY

01
ECGSURGING 0:05
79.71
▼ 29.3%
▼ 1.41%
41.0×
FAD
$6.2M
51.1M*
STRETCHED
02
CAVASURGING 0:00
64.78
▲ 7.4%
▲ 1.30%
9.3×
ORBHODVWH
$11.6M
116.8M*
UNEXPLAINED
03
URGNSURGING 0:00
29.16
▼ 15.2%
▼ 1.29%
15.6×
FAD
$1.4M
48.9M*
JUSTIFIED
04
MPTISURGING 0:00
64.15
▼ 1.5%
▲ 0.96%
23.8×
VWH
$637K
4.3M*
UNEXPLAINED
05
LSPDSURGING 0:00
11.52
▲ 4.9%
▼ 1.24%
16.5×
ORB
$426K
133.3M*
UNEXPLAINED
06
CRCTSURGING 0:00
8.90
▲ 49.2%
▼ 0.72%
15.1×
GAPORBVWHEXT
$395K
54.7M*
STRETCHED
07
BROSSURGING 0:00
43.97
▲ 0.9%
▼ 0.91%
4.0×
FAD
$4.3M
137.9M*
UNEXPLAINED
08
LMRICOOLING 1:35
12.85
▲ 14.5%
▲ 1.06%
132×
ORBHODVWH
$1.7M
—
UNEXPLAINED
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