Ribbon Communications Inc. (RBBN) Insider Ownership

Historic Insider Ownership Trends

RBBN's three largest insider shareholders as of May 23, 2026 are Chase Co Jpmorgan (TenPercentOwner, 52.04Mn shares), Investments Ltd. Swarth (TenPercentOwner, 27.44Mn shares), Bruce William Mcclelland (President Ceo, 1.52Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Chase Co Jpmorgan - 0 52,036,572 11 Apr, 2025
Shaul Shani - 183,466 0 17 Apr, 2026
Beatriz V Infante - 343,224 0 08 Sep, 2025
Krish A Prabhu - 58,477 0 27 May, 2022
R Stewart Jr Ewing - 197,391 0 18 Jun, 2025
Bruns H Grayson - 783,347 0 17 Apr, 2026
Bruce William Mcclelland President Ceo 1,516,164 0 13 Feb, 2026
Anthony Scarfo Evp Gm, Cloud Edge Bu 252,431 0 19 Sep, 2022
Miguel A Lopez Evp, Cfo 456,797 0 21 Oct, 2024
Patrick W Macken Evp, Clo Secretary 343,546 0 17 Oct, 2025
Stephen J. Mccaffery Evp, Sales Emea And Apac 50,025 0 19 Sep, 2022
Eric S Marmurek Svp, Deputy Cfo And Cao 449,807 0 17 Apr, 2026
Steven M Bruny Evp Sales, Americas Region 297,359 0 19 Sep, 2022
Investments Ltd. Swarth - 27,435,739 0 18 Aug, 2022
Tanya Tamone - 180,800 0 18 Jun, 2025
Beer Mariano De - 56,331 0 16 Jun, 2023
Sam Bucci Evp Coo 448,811 0 17 Oct, 2025
Scott Mair - 140,638 0 18 Jun, 2025
John Raymond Townsend Evp, Chief Financial Officer 93,309 0 17 Apr, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
15 Apr, 2026 Eric S Marmurek Common Stock A 37,500 - 464,563 D M
15 Apr, 2026 Shaul Shani Common Stock A 12,971 - 183,466 D A
15 Apr, 2026 Shaul Shani Common Stock A 12,971 - 183,466 D A
15 Apr, 2026 Bruns H Grayson Common Stock A 15,919 - 783,347 D A
15 Apr, 2026 John Raymond Townsend Common Stock A 25,641 - 103,398 D M
15 Apr, 2026 Eric S Marmurek Common Stock D 14,756 $2.48 449,807 D F
15 Apr, 2026 John Raymond Townsend Common Stock D 10,089 $2.48 93,309 D F
15 Apr, 2026 Eric S Marmurek Restricted Stock Units (RSUs) D 37,500 $0.00 37,500 D M
15 Apr, 2026 John Raymond Townsend Restricted Stock Units (RSUs) D 25,641 $0.00 76,923 D M
10 Feb, 2026 Bruce William Mcclelland Common Stock A 12,000 $2.06 1,491,164 D P
11 Feb, 2026 Bruce William Mcclelland Common Stock A 12,500 $1.99 1,503,664 D P
13 Feb, 2026 Bruce William Mcclelland Common Stock A 12,500 $1.98 1,516,164 D P
15 Jan, 2026 Bruns H Grayson Common Stock A 11,718 - 767,428 D A
15 Jan, 2026 Shaul Shani Common Stock A 9,548 - 170,495 D A
15 Jan, 2026 Shaul Shani Common Stock A 9,548 - 170,495 D A
15 Jan, 2026 Shaul Shani Common Stock A 9,548 - 170,495 D A
15 Dec, 2025 Eric S Marmurek Restricted Stock Units (RSUs) D 169,721 $0.00 169,721 D A
31 Oct, 2025 Stephen J. Mccaffery Restricted Stock Units (RSUs) A 432,027 $0.00 432,027 D A
31 Oct, 2025 Stephen J. Mccaffery RSUs A 108,006 $0.00 108,006 D A
31 Oct, 2025 Stephen J. Mccaffery Performance-Based RSUs (PSUs) A 64,804 $0.00 64,804 D A