As of September 29, 2026, the three largest insider holders of MNTN are Ventures Llc Baroda (TenPercentOwner, 6.38Mn shares), Partners Growth Iii Gp, Llc Mercato (TenPercentOwner, 6.17Mn shares), Holdings Mgd (TenPercentOwner, 281.25K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Ventures Llc Baroda | TenPercentOwner | 0 | 6,375,543 | 6,375,543 | 48.6% | 20 Aug, 2026 |
| 2 | Partners Growth Iii Gp, Llc Mercato | TenPercentOwner | 0 | 6,168,022 | 6,168,022 | 47.1% | 28 May, 2025 |
| 3 | Holdings Mgd | TenPercentOwner | 0 | 281,250 | 281,250 | 2.1% | 28 May, 2025 |
| 4 | Grant Ries | Director | 117,196 | 0 | 117,196 | 0.9% | 15 Jun, 2026 |
| 5 | Tony Weisman | Director | 46,893 | 0 | 46,893 | 0.4% | 17 Jun, 2026 |
| 6 | Phalachandra Bhat | Director | 38,620 | 0 | 38,620 | 0.3% | 15 Jun, 2026 |
| 7 | Michael J. Katz | Director | 29,717 | 0 | 29,717 | 0.2% | 08 Sep, 2026 |
| 8 | Joseph John Kaiser | Director | 27,311 | 0 | 27,311 | 0.2% | 08 Jul, 2026 |
| 9 | Joe Boyd Johnson | Director | 23,446 | 0 | 23,446 | 0.2% | 15 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 |
|---|---|---|---|---|---|---|---|---|
| 03 Sep, 2026 | Michael J. Katz | Director | Acquired A | 29,717 | $0.00 | $0 | 29,717 | Direct |
| 18 Aug, 2026 | Ventures Llc Baroda | TenPercentOwner | Disposed S | 275,115 | $12.75 | $3.51Mn | 6,375,543 | Indirect |
| 13 Aug, 2026 | Ventures Llc Baroda | TenPercentOwner | Disposed S | 26,823 | $12.53 | $336.09K | 6,684,275 | Indirect |
| 14 Aug, 2026 | Ventures Llc Baroda | TenPercentOwner | Disposed S | 33,617 | $12.56 | $422.23K | 6,650,658 | Indirect |
| 06 Jul, 2026 | Joseph John Kaiser | Director | Acquired A | 1,701 | $11.39 | $19.37K | 27,311 | Direct |
| 11 Jun, 2026 | Tony Weisman | Director | Acquired A | 46,893 | $0.00 | $0 | 46,893 | Direct |
| 11 Jun, 2026 | Joseph John Kaiser | Director | Acquired A | 23,446 | $0.00 | $0 | 25,610 | Direct |
| 11 Jun, 2026 | Grant Ries | Director | Acquired A | 23,446 | $0.00 | $0 | 117,196 | Direct |
| 11 Jun, 2026 | Phalachandra Bhat | Director | Acquired A | 23,446 | $0.00 | $0 | 38,620 | Direct |
| 11 Jun, 2026 | Joe Boyd Johnson | Director | Acquired A | 23,446 | $0.00 | $0 | 23,446 | Direct |
| 05 Apr, 2026 | Joseph John Kaiser | Director | Acquired A | 2,164 | $8.95 | $19.37K | 2,164 | Direct |
| 01 Dec, 2025 | Hadi Partovi | Director | Disposed S | 192,598 | $13.46 | $2.59Mn | 254,922 | Indirect |
| 02 Dec, 2025 | Hadi Partovi | Director | Disposed S | 168,257 | $13.39 | $2.25Mn | 86,665 | Indirect |
| 03 Dec, 2025 | Hadi Partovi | Director | Disposed S | 86,665 | $13.39 | $1.16Mn | 0 | Indirect |
| 06 Nov, 2025 | Ventures Llc Baroda | TenPercentOwner | Acquired C | 6,711,098 | — | — | 6,711,098 | Indirect |
| 06 Nov, 2025 | Ventures Llc Baroda | TenPercentOwner | Disposed C | 6,711,098 | — | — | 0 | Indirect |
| 29 Jul, 2025 | Phalachandra Bhat | Director | Acquired A | 15,174 | $0.00 | $0 | 15,174 | Direct |
| 23 May, 2025 | Ventures Llc Baroda | TenPercentOwner | Disposed S | 532,130 | $16.00 | $8.51Mn | 0 | Indirect |
| 23 May, 2025 | Partners Growth Iii Gp, Llc Mercato | TenPercentOwner | Acquired C | 164,807 | — | — | 6,468,022 | Indirect |
| 23 May, 2025 | Holdings Mgd | TenPercentOwner | Acquired C | 281,250 | — | — | 281,250 | Indirect |