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

MARMUREK ERIC S

Filed: 5/19/2025ACC: 0001062993-25-009790

InsiderMARMUREK ERIC SCIK 1720721

→

IssuerRIBBON COMMUNICATIONS INC.CIK 1708055

Officer· Principal Accounting Officer

Since Nov 2018

+243.48K

Net shares

Net buyer

$45.1K

Total sold

Open market trades

0B · 0S

Total transactions

287.58K acquired · 44.10K disposed

Non-Derivative Transactions2

Common Stock

Direct

M · Option Exercise

+31.64K

Price / share

—

Trade value

—

% of position

8.7%

5/16/2025

362.38K→394.03K

Common Stock

Direct

F · Tax Withholding

−12.45K

Price / share

$3.62

Trade value

$45.08K

% of position

3.2%

5/16/2025

394.03K→381.57K

Total

Net shares

+19.19K

Net value

-$45.08K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	5/16/2025	M · Option Exercise	+31.64K	—	—	8.7%	362.38K	394.03K
Common Stock Direct	5/16/2025	F · Tax Withholding	−12.45K	$3.62	$45.08K	3.2%	394.03K	381.57K
Total			+19.19K		-$45.08K

Derivative Transactions6

Restricted Stock Units (RSUs)

Direct

A · Award

Converts to

Common Stock

78.13K shares

+78.13K

Strike price

Held after

78.13K

Exercisable

—

5/15/2025

RSUs

Direct

A · Award

Converts to

Common Stock

63.29K shares

+63.29K

Strike price

Held after

63.29K

Exercisable

—

5/15/2025

Performance-Based RSUs (PSUs)

Direct

A · Award

Converts to

Common Stock

46.88K shares

+46.88K

Strike price

Held after

46.88K

Exercisable

—

5/15/2025

PSUs

Direct

A · Award

Converts to

Common Stock

31.25K shares

+31.25K

Strike price

Held after

31.25K

Exercisable

—

5/15/2025

PSUs

Direct

A · Award

Converts to

Common Stock

36.39K shares

+36.39K

Strike price

Held after

36.39K

Exercisable

—

5/15/2025

RSUs

Direct

M · Option Exercise

Converts to

Common Stock

31.64K shares

−31.64K

Strike price

Held after

0.00

Exercisable

—

5/16/2025

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units (RSUs) Direct	Common Stock78.13K shares	5/15/2025	A · Award	+78.13K	—	78.13K
RSUs Direct	Common Stock63.29K shares	5/15/2025	A · Award	+63.29K	—	63.29K
Performance-Based RSUs (PSUs) Direct	Common Stock46.88K shares	5/15/2025	A · Award	+46.88K	—	46.88K
PSUs Direct	Common Stock31.25K shares	5/15/2025	A · Award	+31.25K	—	31.25K
PSUs Direct	Common Stock36.39K shares	5/15/2025	A · Award	+36.39K	—	36.39K
RSUs Direct	Common Stock31.64K shares	5/16/2025	M · Option Exercise	−31.64K	—	0.00