MARMUREK ERIC S

PrivateCIK: 1720721
Location

WESTFORD, MA

MARMUREK ERIC S (Principal Accounting Officer) exercised options at RIBBON COMMUNICATIONS INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise
InsiderMARMUREK ERIC SCIK 1720721
Officer· Principal Accounting Officer
Since Nov 2018
-29.51K
Net shares
Net seller
$112.4K
Total sold
0
Open market trades
0B · 0S
3
Total transactions
75K acquired · 104.51K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+75K

Price / share

Trade value

% of position

19.7%
10/15/2025
381.57K456.57K

Common Stock

Direct
F · Tax Withholding

Shares

29.51K

Price / share

$3.81

Trade value

$112.44K

% of position

6.5%
10/15/2025
456.57K427.06K
Total

Net shares

+45.49K

Net value

-$112.44K

Derivative Transactions1

Restricted Stock Units (RSUs)

Direct
M · Option Exercise
Converts to

Common Stock

75K shares

Shares

75K

Strike price

Held after

75K

Exercisable

10/15/2025
MARMUREK ERIC S — Insider Transaction (Form 4) Filed Oct 17, 2025 | Finecho