MOVER · PRE-MARKET · CAPTURED 09:23 ET

Why SEI rose 20.7% on Sep 9 2026: acquisition announcement

SEI+20.7%on Wed Sep 9 2026

Solaris Energy Infrastructure, Inc. was up 20.7% on the day at $66.40, ranked #8 on 8.5× its usual five-minute volume, when TapeRank recorded this spike at 09:23 ET during the pre-market session.

WHAT THE ROW LOOKED LIKE

LAST66.40

DAY▲ 20.7%

5 MIN▲ 1.10%

5M RVOL8.5×

5M $VOL$561K

FLOAT*65.8M

RANK#8

SESSIONPRE-MARKET

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

AI VERDICT

STRETCHEDCONFIDENCE3/5

Solaris Energy Infrastructure disclosed completion of an acquisition of Omega Foundation Services, funded via roughly 3.6 million newly issued shares plus about $77 million in cash, alongside an unregistered sale of equity securities. The stock is up nearly 20% pre-market on a filing that describes a bolt-on acquisition with modest share issuance relative to the 65.8 million share base, not a scale-changing event.

WHYA single acquisition adding under 6% to shares outstanding and an undisclosed revenue contribution does not typically justify a near-20% single-day move, making the size of the reaction stretched relative to the news.

ANALYZED 09:19 ET · 3 MIN AGO · ANTHROPIC/CLAUDE-SONNET-5

FILINGS · 24H BEFORE THE MOVE

TUE 16:30 ET8-K — Entry into a Material Definitive Agreement; Completion of Acquisition or Disposition of Assets; Unregistered Sales of Equity Securities; Regulation FD Disclosure; Financial Statements and ExhibitsSEC 8-K

SESSION LEVELS AT CAPTURE

VWAP65.03

HOD66.06

LOD60.30

OR HIGH—

OR LOW—

PREV CLOSE55.00

PM HIGH66.06

PM LOW63.00

GAP▲ 12.45%

— MEANS THE LEVEL DID NOT EXIST YET AT THAT INSTANT, NOT ZERO