Transaction · 0001104659-26-112443

Ostrower Sean William

Ostrower Sean William, CFO, reported a transaction classified as withholding at Avalanche Treasury Corp involving 15541.000000 shares for an estimated $29527.90. Reported holdings after the transaction were 283860.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

withholdingSEC transaction code FCFO
AVATAvalanche Treasury Corp
Filing timeSep 30
Trade dateSep 30, 2026
Filing · SECView on SEC
InsiderProfile
% of reported position tradedUnavailableCalculated only for code-P purchases and code-S sales.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$1.83
Pre-filing
1mo ago -60.7%1w ago +20.8%1d ago +3.8%
Returns since
7d30d90d180d1y

AVAT price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
AVAT since 2026-09-30Filed yesterday · 1 day of post-filing data
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
withholding
Code F
Identifier
0001104659-26-112443
Class A Common Stock
Transaction date
Sep 30, 2026
Filed Sep 30, 2026, 10:33 PM · 0d delay
Shares
15.5k sh
$1.90 per share
Estimated value
-$29.5k
Computed from shares × price
Holdings after
283k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership
-12score
Filing-only score

-12

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Financial Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    Represents a grant of restricted stock units ("RSUs") on September 28, 2026. The RSUs will vest 1/8 on each of the first eight six-month anniversaries of March 9, 2026. Each

  2. RSU represents a contingent right to receive one share of Class A common stock.

  3. F2

    Represents shares of Class A Common Stock withheld by the Issuer to satisfy tax withholding upon the vesting of RSUs.

Original filing · 0001104659-26-112443
Related transactions

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Same reporting owner
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