Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 6 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
April 15, 2026 RBBN M 25,641 · · 103,398 Direct +32.98% Acquired (price as of 2026-10-05)
April 15, 2026 RBBN F 10,089 $2.48 $25,021 93,309 Direct -9.76% Disposed -31.9% (price as of 2026-10-05)
April 15, 2026 RBBN M 25,641 · · 76,923 Direct -25.00% Disposed (price as of 2026-10-05)
Oct. 15, 2025 RBBN M 128,205 · · 128,205 Direct · Acquired (price as of 2026-10-05)
Oct. 15, 2025 RBBN F 50,448 $3.81 $192,207 77,757 Direct -39.35% Disposed -55.6% (price as of 2026-10-05)
Oct. 15, 2025 RBBN M 128,205 · · 102,564 Direct -55.56% Disposed (price as of 2026-10-05)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
April 15, 2026 RBBN Restricted Stock Units (RSUs) Common Stock (25,641) · · 25,641 Disposed
Oct. 15, 2025 RBBN Restricted Stock Units (RSUs) Common Stock (128,205) · · 128,205 Disposed

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 4 holdings

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Nov. 4, 2024 RBBN Restricted Stock Units (RSUs) [F1]→ Common Stock (230,769) 230,769 Direct
Nov. 4, 2024 RBBN Performance-Based RSUs (PSUs) [F1]→ Common Stock (314,583) 314,583 Direct
Nov. 4, 2024 RBBN PSUs [F1]→ Common Stock (138,461) 138,461 Direct
Nov. 4, 2024 RBBN PSUs [F1]→ Common Stock (92,308) 92,308 Direct