As of September 29, 2026, Beta Bionics's top three insider holders are Hadley Harbor Aggregator Iv, L.P. Wellington (TenPercentOwner, 3.90Mn shares), Sean Saint (President Ceo, 398.43K shares), Mike Mensinger (Chief Product Officer, 177.39K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Hadley Harbor Aggregator Iv, L.P. Wellington | TenPercentOwner | 3,901,599 | 0 | 3,901,599 | 77.0% | 03 Feb, 2025 |
| 2 | Sean Saint | President Ceo | 398,429 | 0 | 398,429 | 7.9% | 04 Sep, 2026 |
| 3 | Mike Mensinger | Chief Product Officer | 177,390 | 0 | 177,390 | 3.5% | 17 Sep, 2026 |
| 4 | Steven Jon Russell | Chief Medical Officer | 169,628 | 0 | 169,628 | 3.3% | 03 Sep, 2026 |
| 5 | Stephen Feider | Chief Financial Officer | 159,378 | 0 | 159,378 | 3.1% | 03 Sep, 2026 |
| 6 | Mark Hopman | Chief Commercial Officer | 56,479 | 0 | 56,479 | 1.1% | 17 Sep, 2026 |
| 7 | Adam Lezack | Director | 55,796 | 0 | 55,796 | 1.1% | 26 May, 2026 |
| 8 | Gerard J Michel | Director | 33,509 | 0 | 33,509 | 0.7% | 26 May, 2026 |
| 9 | Danny L. Dearen | Director | 32,209 | 0 | 32,209 | 0.6% | 26 May, 2026 |
| 10 | Sean Carney | Director | 32,209 | 0 | 32,209 | 0.6% | 26 May, 2026 |
| 11 | Maria Palasis | Director | 29,397 | 0 | 29,397 | 0.6% | 26 May, 2026 |
| 12 | Christy Jones | Director | 19,564 | 0 | 19,564 | 0.4% | 23 Sep, 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 |
|---|---|---|---|---|---|---|---|---|
| 22 Sep, 2026 | Christy Jones | Director | Disposed S | 6,430 | $23.00 | $147.89K | 19,564 | Direct |
| 09 Sep, 2026 | Mark Hopman | Chief Commercial Officer | Disposed S | 35,994 | $18.46 | $664.55K | 88,033 | Direct |
| 16 Sep, 2026 | Mark Hopman | Chief Commercial Officer | Disposed S | 30,779 | $20.13 | $619.64K | 56,479 | Direct |
| 16 Sep, 2026 | Mike Mensinger | Chief Product Officer | Disposed S | 2,650 | $22.00 | $58.30K | 177,390 | Direct |
| 09 Sep, 2026 | Mark Hopman | Chief Commercial Officer | Disposed S | 36,870 | $18.46 | $680.72K | 87,157 | Direct |
| 03 Sep, 2026 | Sean Saint | President Ceo | Disposed S | 5,641 | $20.08 | $113.26K | 398,429 | Direct |
| 02 Sep, 2026 | Steven Jon Russell | Chief Medical Officer | Disposed S | 4,221 | $19.11 | $80.68K | 169,628 | Direct |
| 02 Sep, 2026 | Sean Saint | President Ceo | Disposed S | 16,867 | $19.11 | $322.38K | 404,070 | Direct |
| 02 Sep, 2026 | Stephen Feider | Chief Financial Officer | Disposed S | 6,675 | $19.11 | $127.58K | 159,378 | Direct |
| 02 Sep, 2026 | Mike Mensinger | Chief Product Officer | Disposed S | 4,375 | $19.11 | $83.62K | 180,040 | Direct |
| 02 Sep, 2026 | Mark Hopman | Chief Commercial Officer | Disposed S | 5,327 | $19.11 | $101.82K | 124,027 | Direct |
| 26 Jun, 2026 | Stephen Feider | Chief Financial Officer | Acquired M | 5,104 | $5.10 | $26.03K | 171,157 | Direct |
| 26 Jun, 2026 | Stephen Feider | Chief Financial Officer | Disposed S | 5,104 | $17.05 | $87.01K | 166,053 | Direct |
| 29 Jun, 2026 | Stephen Feider | Chief Financial Officer | Acquired M | 4,896 | $5.10 | $24.97K | 170,949 | Direct |
| 29 Jun, 2026 | Stephen Feider | Chief Financial Officer | Disposed S | 4,896 | $17.03 | $83.38K | 166,053 | Direct |
| 26 Jun, 2026 | Stephen Feider | Chief Financial Officer | Disposed M | 5,104 | $0.00 | $0 | 44,591 | Direct |
| 29 Jun, 2026 | Stephen Feider | Chief Financial Officer | Disposed M | 4,896 | $0.00 | $0 | 39,695 | Direct |
| 26 Jun, 2026 | Stephen Feider | Chief Financial Officer | Acquired M | 4,982 | $5.10 | $25.41K | 171,035 | Direct |
| 26 Jun, 2026 | Stephen Feider | Chief Financial Officer | Disposed S | 5,104 | $17.05 | $87.01K | 165,931 | Direct |
| 29 Jun, 2026 | Stephen Feider | Chief Financial Officer | Acquired M | 4,896 | $5.10 | $24.97K | 170,827 | Direct |