Similarweb's three largest insider shareholders as of September 05, 2026 are Harel Moshe Beit-On (Director, 10.89Mn shares), Or Offer (Chief Executive Officer, 4.60Mn shares), Or Offer (Chief Executive Officer, 4.60Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Harel Moshe Beit-On | Director | 10,885,778 | 0 | 10,885,778 | 53.8% | 21 May, 2026 |
| 2 | Or Offer | Chief Executive Officer | 9,196,582 | 0 | 9,196,582 | 45.4% | 27 Aug, 2026 |
| 3 | Barak Eilam | Director | 101,315 | 0 | 101,315 | 0.5% | 22 May, 2026 |
| 4 | Tamar Rapaport-Dagim | Director | 63,584 | 0 | 63,584 | 0.3% | 19 May, 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 |
|---|---|---|---|---|---|---|---|---|
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Acquired M | 164,817 | $2.71 | $446.65K | 4,763,108 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 164,817 | $9.00 | $1.48Mn | 4,598,291 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Acquired M | 39,302 | $2.71 | $106.51K | 4,637,593 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 39,302 | $9.01 | $354.19K | 4,598,291 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Acquired M | 39,000 | $0.40 | $15.60K | 4,637,291 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 39,000 | $9.00 | $351.17K | 4,598,291 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Acquired M | 140,008 | $3.04 | $425.62K | 4,738,299 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 140,008 | $9.01 | $1.26Mn | 4,598,291 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed M | 164,817 | $0.00 | $0 | 400,000 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed M | 39,302 | $0.00 | $0 | 400,000 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed M | 39,000 | $0.00 | $0 | 700,000 | Direct |
| 26 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed M | 140,008 | $0.00 | $0 | 0 | Direct |
| 13 Aug, 2026 | Or Offer | Chief Executive Officer | Acquired M | 228,500 | $3.04 | $694.64K | 4,972,896 | Direct |
| 13 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 228,500 | $8.82 | $2.02Mn | 4,744,396 | Direct |
| 13 Aug, 2026 | Or Offer | Chief Executive Officer | Acquired M | 200,000 | $0.40 | $80.00K | 4,944,396 | Direct |
| 13 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 200,000 | $8.79 | $1.76Mn | 4,744,396 | Direct |
| 13 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 106,105 | $8.75 | $928.42K | 4,638,291 | Direct |
| 13 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 40,000 | $8.90 | $356.00K | 4,598,291 | Direct |
| 14 Aug, 2026 | Or Offer | Chief Executive Officer | Acquired M | 59,992 | $3.04 | $182.38K | 4,658,283 | Direct |
| 14 Aug, 2026 | Or Offer | Chief Executive Officer | Disposed S | 59,992 | $8.90 | $533.96K | 4,598,291 | Direct |