Bioventus's three largest insider shareholders as of September 09, 2026 are John A. Bartholdson (Director, 6.94Mn shares), Investment Company, Llc Juniper (TenPercentOwner, 6.83Mn shares), Stavros G. Vizirgianakis (Director, 2.78Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Investment Company, Llc Juniper | TenPercentOwner | 0 | 6,833,857 | 6,833,857 | 57.6% | 15 Aug, 2023 |
| 2 | Stavros G. Vizirgianakis | Director | 2,781,888 | 0 | 2,781,888 | 23.5% | 22 Jun, 2022 |
| 3 | William A Hawkins | Director | 297,640 | 0 | 297,640 | 2.5% | 04 Jun, 2026 |
| 4 | Mark Leonard Singleton | Svp Cfo | 177,333 | 0 | 177,333 | 1.5% | 14 Apr, 2026 |
| 5 | Anthony P Iii Bihl | Interim Ceo | 138,290 | 26,595 | 164,885 | 1.4% | 22 Aug, 2023 |
| 6 | Anthony D'Adamio | Svp General Counsel | 153,655 | 0 | 153,655 | 1.3% | 14 Apr, 2026 |
| 7 | Guy P Nohra | Director | 148,892 | 0 | 148,892 | 1.3% | 04 Jun, 2026 |
| 8 | Alessandra Pavesio | Svp Chief Science Officer | 148,309 | 0 | 148,309 | 1.3% | 05 Apr, 2022 |
| 9 | Susan M Stalnecker | Director | 138,239 | 0 | 138,239 | 1.2% | 04 Jun, 2026 |
| 10 | Guido J Neels | Director | 117,523 | 0 | 117,523 | 1.0% | 04 Jun, 2026 |
| 11 | Martin P Sutter | Director, TenPercentOwner | 117,523 | 0 | 117,523 | 1.0% | 04 Jun, 2026 |
| 12 | Robert E Claypoole | President And Ceo | 116,997 | 0 | 116,997 | 1.0% | 13 Jan, 2026 |
| 13 | Mary Kay Ladone | Director | 113,076 | 0 | 113,076 | 1.0% | 04 Jun, 2026 |
| 14 | John A. Bartholdson | Director, TenPercentOwner | 111,902 | 0 | 111,902 | 0.9% | 04 Jun, 2026 |
| 15 | Pat Beyer | Director | 109,683 | 0 | 109,683 | 0.9% | 04 Jun, 2026 |
| 16 | John Nosenzo | Chief Commercial Officer | 83,932 | 0 | 83,932 | 0.7% | 05 Apr, 2022 |
| 17 | Michelle Mcmurry-Heath | Director | 77,664 | 0 | 77,664 | 0.7% | 04 Jun, 2026 |
| 18 | Katrina J Church | Svp Chief Compliance Officer | 64,164 | 0 | 64,164 | 0.5% | 14 Apr, 2026 |
| 19 | Gregory O. Anglum | Svp Cfo | 55,013 | 0 | 55,013 | 0.5% | 15 Feb, 2022 |
| 20 | Philip G. Cowdy | Director | 43,982 | 0 | 43,982 | 0.4% | 04 Jun, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 02 Jun, 2026 | Philip G. Cowdy | Director | Acquired M | 32,282 | $0.00 | $0 | 43,982 | Direct |
| 02 Jun, 2026 | Guy P Nohra | Director | Acquired M | 32,282 | $0.00 | $0 | 148,892 | Direct |
| 02 Jun, 2026 | John A. Bartholdson | Director, TenPercentOwner | Acquired M | 32,282 | $0.00 | $0 | 111,902 | Direct |
| 02 Jun, 2026 | Susan M Stalnecker | Director | Acquired M | 32,282 | $0.00 | $0 | 138,239 | Direct |
| 02 Jun, 2026 | Pat Beyer | Director | Acquired M | 32,282 | $0.00 | $0 | 108,718 | Direct |
| 02 Jun, 2026 | Michelle Mcmurry-Heath | Director | Acquired M | 32,282 | $0.00 | $0 | 77,279 | Direct |
| 02 Jun, 2026 | Guido J Neels | Director | Acquired M | 32,282 | $0.00 | $0 | 117,523 | Direct |
| 02 Jun, 2026 | Martin P Sutter | Director, TenPercentOwner | Acquired M | 32,282 | $0.00 | $0 | 117,523 | Direct |
| 02 Jun, 2026 | William A Hawkins | Director | Acquired M | 39,789 | $0.00 | $0 | 297,640 | Direct |
| 02 Jun, 2026 | Mary Kay Ladone | Director | Acquired M | 32,282 | $0.00 | $0 | 111,263 | Direct |
| 02 Jun, 2026 | Guido J Neels | Director | Disposed M | 32,282 | $0.00 | $0 | 0 | Direct |
| 02 Jun, 2026 | Michelle Mcmurry-Heath | Director | Disposed M | 32,282 | $0.00 | $0 | 0 | Direct |
| 02 Jun, 2026 | Philip G. Cowdy | Director | Disposed M | 32,282 | $0.00 | $0 | 0 | Direct |
| 02 Jun, 2026 | Susan M Stalnecker | Director | Disposed M | 32,282 | $0.00 | $0 | 0 | Direct |
| 02 Jun, 2026 | Guy P Nohra | Director | Disposed M | 32,282 | $0.00 | $0 | 0 | Direct |
| 02 Jun, 2026 | William A Hawkins | Director | Disposed M | 39,789 | $0.00 | $0 | 0 | Direct |
| 02 Jun, 2026 | Mary Kay Ladone | Director | Disposed M | 32,282 | $0.00 | $0 | 0 | Direct |
| 02 Jun, 2026 | Pat Beyer | Director | Disposed M | 32,282 | $0.00 | $0 | 0 | Direct |
| 03 Jun, 2026 | Susan M Stalnecker | Director | Acquired A | 25,146 | $0.00 | $0 | 25,146 | Direct |
| 03 Jun, 2026 | Guy P Nohra | Director | Acquired A | 25,146 | $0.00 | $0 | 25,146 | Direct |