Tamone Tanya 4

4 · Ribbon Communications Inc. · Filed Jun 17, 2026

AI-generated summary of this filing

Updated Jun 17, 2026

Ribbon (RBBN) Director Tanya Tamone Exercises/Withholds RSUs

What Happened

Tanya Tamone, a director of Ribbon Communications (RBBN), had vested restricted stock units (RSUs) convert into shares on June 16, 2026. The filing shows an exercise/conversion of 42,500 derivative awards on 2026-06-16 and a simultaneous reported disposition of 42,500 shares at $0.00 (derivative).
Separately, the filing reports a grant/award of 63,197 RSUs on June 15, 2026 (reported at $0.00, derivative). No cash purchase or open-market sale for a monetary value is reported in this filing.

Key Details

Transaction types and dates:
- 2026-06-15: Grant/award (A) — 63,197 RSUs @ $0.00 (acquired, derivative).
- 2026-06-16: Exercise/conversion (M) — 42,500 RSUs converted to shares (acquired).
- 2026-06-16: Exercise/conversion (M) — 42,500 shares reported disposed at $0.00 (derivative).
Prices/values: All RSU entries reported at $0.00; the disposed 42,500 shares are reported at $0.00 in the filing (no cash proceeds shown).
Shares owned after transaction: Not specified in this filing.
Footnotes from the filing:
- F1: Each RSU represents the contingent right to one share of common stock.
- F2: The 63,197 RSUs will vest on June 15, 2027 subject to continued service (or earlier vesting if the director leaves following the 2027 annual meeting under described conditions).
- F3: A separate RSU award (from June 16, 2025) vested in full on June 16, 2026 — consistent with the conversion/withholding activity reported.
Timeliness: The filing does not indicate a late filing status.

Context

The M (exercise/conversion) entries reflect conversion of vested RSUs into common shares. The matching disposition of 42,500 shares at $0.00 is consistent with share withholding or surrender to satisfy tax withholding obligations upon vesting (commonly reported as $0.00 in Form 4s).
The 63,197-RSU grant is a future-compensation award (A) with vesting conditions; such grants are disclosures of compensation, not open-market purchases or sales, and do not alone signal a buy or sell decision.

Form 4

Period: 2026-06-15

Director

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-06-16+42,500→ 223,300 total
Award
Restricted Stock Units (RSUs)
[F1][F2]
2026-06-15+63,197→ 63,197 total
→ Common Stock (63,197 underlying)
Exercise/Conversion
RSUs
[F1][F3]
2026-06-16−42,500→ 0 total
→ Common Stock (42,500 underlying)

Footnotes (3)

[F1]Each RSU represents a contingent right to receive one share of the Issuer's common stock.
[F2]The RSUs will vest on June 15, 2027, subject to the Reporting Person's continued service with the Issuer through such date; provided, however, that if the Issuer's 2027 Annual Meeting of Stockholders (the "2027 Annual Meeting") occurs prior to June 15, 2027, and, at such 2027 Annual Meeting, the Reporting Person either chooses not to stand for re-election to the Issuer's Board of Directors or, after standing for re-election, is not re-elected, then these RSUs will vest as of the date of the 2027 Annual Meeting.
[F3]The RSUs were awarded on June 16, 2025 and vested in full on June 16, 2026.

Signature

Patrick Macken, By POA from Tanya Tamone|2026-06-17

1 file