Transaction · 0001708055-26-000080

Marmurek Eric S

Marmurek Eric S, EVP, CFO, reported a transaction classified as withholding at Ribbon Communications Inc. involving 14756.000000 shares for an estimated $21543.76. Reported holdings after the transaction were 566450.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

withholdingSEC transaction code FEVP, CFO
RBBNRibbon Communications Inc.
Trade date
Oct 15, 2026
Filing date
Oct 19, 2026
View on SEC Insider profile
Estimated value-$21.5kShares × reported price
Shares traded14.7k$1.46 per share
Holdings after566kDirect
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

Calculated 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.

RBBN price since this filing

Daily closing prices, with the filing date and available return windows
RBBN · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago +0.0%1w ago +0.0%1d ago +0.0%
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
withholding
Code F
Identifier
0001708055-26-000080
Common Stock
Transaction date
Oct 15, 2026
Filed Oct 19, 2026, 01:10 PM · 4d delay
Shares
14,756 sh
$1.46 per share
Estimated value
-$21.5k
Computed from shares × price
Holdings after
566,450 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

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

-16 points

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.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • tax_withholding-22 points

    transaction_code = F

    Tax withholding on vesting shares is mechanical.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

EVP, Chief Financial Officer

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

    Eash RSU represents a contingent right to receive one share of the Registrant's common stock.

  2. F2

    Reflects shares of common stock withheld by the Registrant to satisfy tax withholding obligations in connection with the vesting.

  3. F3

    The RSUs were issued on October 15, 2024 and vested as to 50% on October 15, 2025. The remaining 50% of the RSUs vested in two equal semi-annual installments thereafter through October 15, 2026.

Original filing · 0001708055-26-000080
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