Here are the Form 4 insider transactions from Ribbon Communications Inc. (RBBN) in our archive over the last 12 months, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow RBBN and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full RBBN filings page.
Ribbon Communications Inc. EVP, Global Sales Stephen J. McCaffery reported that 36,003 and 108,006 RSUs vested into common shares on October 31, 2026. The company withheld 16,921 and 50,762 shares, respectively, to satisfy tax withholding obligations; each withholding was reported at $1.55 per share. No Rule 10b5-1 plan is reported.
Ribbon Communications Inc. (RBBN) President & CEO Bruce William McClelland purchased 60,000 common shares on October 30, 2026, at a weighted average price of $1.604 per share. His reported direct holdings after the purchase were 2,969,454 shares. No Rule 10b5-1 plan is reported for the purchase.
Ribbon Communications Inc. EVP, Chief Financial Officer Eric S. Marmurek reported the conversion of 37,500 restricted stock units into 37,500 common shares on October 15, 2026, as the units vested. Ribbon withheld 14,756 common shares at $1.46 per share to satisfy tax withholding obligations related to vesting. Each RSU represented a contingent right to receive one common share.
Ribbon Communications Inc. (RBBN) director Bruns H. Grayson received 19,176 shares of common stock on October 15, 2026, issued instead of cash fees for service on the board and its committees. His reported direct holdings after the award were 859,446 shares.
Ribbon Communications Inc. director Shaul Shani reported converting 185,210 restricted stock units into 185,210 common shares on October 15, 2026. The RSUs, granted on October 15, 2025, vested in full and converted one-for-one. Shani also received 15,625 common shares in lieu of cash fees for board service; the price was determined under the company's Non-Employee Director Compensation Policy.
GRAYSON BRUNS H reported acquisition or exercise transactions in this Form 4 filing.
Ribbon Communications Inc. director and reporting person GRAYSON BRUNS H received an equity award of 14,423 shares of common stock on 2026-07-15, issued in lieu of cash fees for service on the Board of Directors and its committees. After this grant, he directly holds 840,270 common shares.
SHANI SHAUL reported acquisition or exercise transactions in this Form 4 filing.
Ribbon Communications Inc. director Shaul Shani reported a grant of 11,752 shares of common stock on July 15, 2026. The shares were issued in lieu of cash fees for service on the Board of Directors, with the price determined under the Non-Employee Director Compensation Policy, bringing Shani’s direct holdings to 237,718 shares.
Ribbon Communications Inc. executive vice president and chief operating officer Sam Bucci received new equity awards in the form of restricted and performance-based stock units tied to Ribbon's common stock. These awards are part of his compensation and do not represent open-market purchases or sales.
The filing reports grants of 250,000 restricted stock units (RSUs) and performance-based RSUs (PSUs) totaling 250,000 underlying shares of common stock at a conversion price of $0.00 per share-equivalent. The RSUs vest one-third on June 15, 2027, with the remaining two-thirds vesting in four equal semi-annual installments through June 15, 2029, encouraging multi-year retention.
The PSUs convert to common stock on a one-for-one basis but only if specified performance goals are achieved. One PSU tranche vests based on annual goals set by the Compensation Committee for three fiscal years, with potential issuance from zero up to 100% of the target shares, vesting on April 15, 2029. Another PSU tranche is tied to total shareholder return relative to a peer index over three fiscal years, with potential issuance from zero up to 125% of target shares, also vesting on April 15, 2029.
Ribbon Communications EVP Stephen J. McCaffery received multiple equity awards in the form of restricted and performance-based stock units that convert into Common Stock on a one-for-one basis. These awards are compensation grants at no purchase price, not open-market share purchases.
He was granted RSUs that vest as to one-third on June 15, 2027, with the remaining two-thirds vesting in four equal semi-annual installments through June 15, 2029. Additional performance-based RSUs (PSUs) were granted, where the number of shares ultimately issued will depend on achievement of annual goals set by the Compensation Committee and on the company’s total shareholder return versus a peer index over three fiscal years, with PSUs scheduled to vest on April 15, 2029 and payout ranging from zero up to 100% or 125% of target depending on the specific award.
Marmurek Eric S reported acquisition or exercise transactions in this Form 4 filing.
Ribbon Communications Inc. reported that EVP and Chief Financial Officer Eric S. Marmurek received new equity awards in the form of restricted and performance-based stock units. On June 15, 2026, he was granted 60,000 PSUs, 90,000 Performance-Based RSUs (PSUs), and 150,000 RSUs, each convertible into Common Stock on a one-for-one basis.
The 150,000 RSUs vest over time, with one-third vesting on June 15, 2027 and the remaining two-thirds vesting in four equal semi-annual installments through June 15, 2029. The PSUs can result in between zero and up to 100% or 125% of the target share amounts, depending on annual performance goals or total shareholder return versus a peer index over three fiscal years, and are scheduled to vest on April 15, 2029. These are compensation-related grants rather than open-market share purchases or sales.
Macken Patrick W reported acquisition or exercise transactions in this Form 4 filing.
Ribbon Communications EVP and Chief Legal Officer Patrick W. Macken received new equity awards. On June 15, 2026 he was granted 65,000 PSUs, 97,500 performance-based RSUs (PSUs), and 162,500 RSUs, each convertible into Common Stock on a one-for-one basis. The RSUs vest from June 15, 2027 through June 15, 2029, while the PSUs vest on April 15, 2029 based on annual performance goals and relative total shareholder return, which can yield from zero up to the stated target (or 125% of target for one PSU grant).
Ribbon Communications director Tanya Tamone reported routine equity compensation activity. On June 16, 2026, she exercised 42,500 RSUs into the same number of common shares, bringing her direct common stock holdings to 223,300 shares. The exercised RSUs had been awarded on June 16, 2025 and fully vested on June 16, 2026.
On June 15, 2026, she also received a new grant of 63,197 restricted stock units. These RSUs will vest on June 15, 2027, subject to continued service, or earlier on the date of Ribbon’s 2027 Annual Meeting of Stockholders if she does not stand for re-election or is not re-elected at that meeting.
SILVER LOUIS reported acquisition or exercise transactions in this Form 4 filing.
Ribbon Communications Inc. director Louis Silver received a grant of 63,197 Restricted Stock Units (RSUs) tied to the company’s common stock. Each RSU represents a right to receive one share when it vests. The award will vest on June 15, 2027, if he continues serving the company.
If Ribbon’s 2027 annual stockholders’ meeting occurs before June 15, 2027 and Silver either does not stand for re-election or is not re-elected, the RSUs will instead vest on the date of that meeting. Following this grant, he holds 63,197 RSUs directly.
Ribbon Communications Inc. director Scott Mair reported equity compensation activity involving restricted stock units (RSUs) and common shares. On June 16, 2026, he exercised RSUs to acquire 67,500 shares of common stock, leaving him with 208,138 common shares held directly after the transaction.
The filing also shows a new grant of 63,197 RSUs on June 15, 2026. Each RSU represents a right to receive one share of common stock. These RSUs are scheduled to vest on June 15, 2027, subject to his continued service, or earlier on the date of the company’s 2027 annual stockholder meeting under specified board service conditions.
Ribbon Communications director Shani Shaul reported routine equity compensation activity. Shaul received an award of 63,197 Restricted Stock Units (RSUs) that each represent a right to one share of common stock. These RSUs are scheduled to vest on June 15, 2027, subject to continued service, or earlier at the 2027 Annual Meeting of Stockholders if she does not stand for re-election or is not re-elected.
On June 16, 2026, Shaul also exercised 42,500 RSUs for 42,500 shares of common stock, leaving no remaining RSUs from that prior grant and resulting in direct ownership of 225,966 common shares. The filing shows no open-market purchases or sales, only grants and conversions.
Ribbon Communications Inc. director Beatriz V. Infante reported compensation-related equity activity. She exercised previously granted restricted stock units into 42,500 shares of common stock, increasing her direct common share holdings to 385,724 shares after the transactions. Separately, she received a new award of 63,197 restricted stock units (RSUs), each representing the right to receive one share of common stock. These RSUs are scheduled to vest on June 15, 2027, subject to her continued service, or earlier on the date of the company’s 2027 Annual Meeting of Stockholders if she is not standing for, or does not win, re-election at that meeting.
Ribbon Communications Inc. director H. Bruns Grayson reported compensation-related equity activity. On June 16, 2026, he exercised 42,500 RSUs, receiving the same number of common shares and bringing his direct holdings to 825,847 shares of common stock.
On June 15, 2026, he was granted 63,197 new Restricted Stock Units (RSUs), each representing one share of common stock. These RSUs vest on June 15, 2027, subject to continued board service, or earlier on the date of the company’s 2027 annual stockholder meeting if he does not continue on the board then.
Ribbon Communications director Stewart R. Ewing Jr. reported equity compensation activity, not open‑market trading. On June 16, 2026, he exercised 42,500 restricted stock units (RSUs), receiving an equal number of common shares and bringing his direct holdings to 239,891 shares.
On June 15, 2026, he also received a new grant of 63,197 RSUs. According to the terms, these RSUs are scheduled to vest on June 15, 2027, subject to his continued service, or earlier on the date of the company’s 2027 Annual Meeting of Stockholders if he does not stand for, or is not, re‑elected. Each RSU represents a contingent right to receive one share of Ribbon common stock.
Ribbon Communications EVP and Chief Legal Officer Patrick W. Macken reported routine equity award vesting and related tax withholding. On April 17 and May 15, 2026, his RSUs and PSUs vested and converted into a total of 251,081 shares of common stock, with 112,681 shares withheld by the company to cover tax obligations at prices around $2.63–$2.71 per share. Following these compensation-related transactions, he directly owns 482,146 shares of Ribbon Communications common stock, with no open-market purchases or sales reported in this filing.
Ribbon Communications EVP and COO Sam Bucci reported routine equity compensation activity involving RSUs and PSUs, not open-market trading. On April 17 and May 15, 2026, he exercised derivative awards into a total of 323,770 shares of common stock. In connection with these vestings, 173,310 shares were withheld at prices of $2.63 and $2.71 per share to cover tax obligations, as is common for stock-based compensation. Footnotes explain that the vested performance units were earned based on pre-set financial and total shareholder return goals determined by the board’s compensation committee.
Ribbon Communications EVP and CFO Eric S. Marmurek reported a series of equity award vesting events and related tax-withholding transactions in company stock. He exercised Restricted Share Units (RSUs) and Performance Share Units (PSUs) into common shares and had a portion of those shares withheld to cover taxes.
The filing shows exercises of stock units totaling 154,814 shares, offset by 61,005 shares withheld for tax obligations at prices around $2.63–$2.71 per share. These are compensation-related events rather than open-market purchases or sales, and reflect the vesting of awards tied to financial goals and total shareholder return performance through December 31, 2025.
Ribbon Communications CEO Bruce McClelland reported compensation-related stock activity involving restricted and performance share units. He exercised or converted awards into a total of 2,297,255 shares of common stock, primarily from RSUs and PSUs that vested based on pre-set financial and total shareholder return goals through December 31, 2025.
To cover tax withholding obligations upon vesting, 903,965 shares of common stock were withheld at prices around $2.63–$2.71 per share. The transactions are coded as option/award exercises (M) and tax-withholding dispositions (F), with no open-market purchases or sales reported.
Ribbon Communications EVP and CFO John Raymond Townsend exercised Restricted Stock Units into 25,641 shares of Common Stock on April 15, 2026. The company withheld 10,089 shares at $2.48 per share to cover tax obligations related to the vesting.
After these transactions, Townsend directly holds 93,309 shares of Common Stock. The RSUs were granted on October 15, 2024 and convert to Common Stock on a one-for-one basis. The remaining RSUs vest in three equal semi-annual installments through October 15, 2027, indicating additional potential share delivery over time as they vest.
GRAYSON BRUNS H reported acquisition or exercise transactions in this Form 4 filing.
Ribbon Communications Inc. director H. Grayson received a grant of 15,919 shares of Common Stock on April 15, 2026. These shares were issued in lieu of cash fees for service on the company’s Board of Directors and its committees, with the grant price determined under the company’s Non-Employee Director Compensation Policy. After this award, the director directly holds 783,347 shares of Common Stock.
Ribbon Communications SVP, Deputy CFO and CAO Eric S. Marmurek exercised restricted stock units and settled related taxes in shares. On April 15, 2026, he exercised 37,500 Restricted Stock Units (each RSU representing a contingent right to one common share) into 37,500 shares of common stock. In connection with this vesting, 14,756 shares were withheld by the company at $2.48 per share to satisfy tax withholding obligations, rather than sold in the open market. These RSUs were originally issued on October 15, 2024, with remaining RSUs scheduled to vest on October 15, 2026. After these transactions, Marmurek directly holds 449,807 shares of Ribbon common stock, reflecting a routine compensation-related event.
SHANI SHAUL reported acquisition or exercise transactions in this Form 4 filing.
Ribbon Communications Inc. director Shani Shaul received a grant of 12,971 shares of Common Stock on April 15, 2026. These shares were issued in lieu of cash fees for service on the company’s Board of Directors, with the price set under the Non-Employee Director Compensation Policy. After this award, Shaul directly holds 183,466 shares of Ribbon Communications common stock.
Ribbon Communications Inc. President & CEO Bruce William McClelland reported open-market purchases of company stock. On February 10, 2026, he bought 12,000 common shares at $2.0585 each. On February 11, 2026, he bought another 12,500 shares at $1.9884 per share, and on February 13, 2026, he purchased 12,500 shares at $1.98 per share. After these transactions, he directly owned 1,516,164 shares of Ribbon Communications common stock.
Ribbon Communications Inc. director Shaul Shani reported receiving 9,548 shares of Ribbon common stock on 01/15/2026. The shares were issued in lieu of cash fees for his service on the company’s Board of Directors, with the price determined under Ribbon’s Non-Employee Director Compensation Policy. After this stock grant, he beneficially owns 170,495 shares of Ribbon common stock, held directly.
Ribbon Communications Inc. director Bruns H. Grayson reported receiving 11,718 shares of common stock on January 15, 2026 as equity compensation. The shares were issued in lieu of cash fees for his service on the company’s Board of Directors and its committees, in line with Ribbon’s Non-Employee Director Compensation Policy. After this stock issuance, Grayson beneficially owned 767,428 shares of Ribbon common stock in direct ownership form.
Ribbon Communications Inc. officer Rick Marmurek, SVP, Deputy CFO and CAO, received a grant of 169,721 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Ribbon Communications common stock, so the award is tied to 169,721 underlying shares.
The RSUs were issued on December 12, 2025 and will vest in two equal tranches: 50% on December 15, 2026 and the remaining 50% on December 15, 2027, meaning he will receive the underlying shares over time as the vesting dates are reached.