Insider · CIK 0001910424

Or Offer

Files at: SMWB. On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $0 · 0sales $16.5M · 11net −$16.5M

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 24, 2026 SForm 4 →	Sep 25, 7:46 am EDT	SIMILARWEB LTD.SMWB	114,300	$7.69	$879,102	3,930,481	−2.83%	10b5-1
Sep 22, 2026 SForm 4 →	Sep 24, 7:56 am EDT	SIMILARWEB LTD.SMWB	62,900	$8.45	$531,437	4,044,781	−1.53%	10b5-1
Sep 18, 2026 SForm 4 →	Sep 22, 7:43 am EDT	SIMILARWEB LTD.SMWB	69,700	$8.32	$579,894	4,107,681	−1.67%	10b5-1
Sep 16, 2026 SForm 4 →	Sep 18, 6:13 am EDT	SIMILARWEB LTD.SMWB	76,119	$8.38	$637,648	4,177,381	−1.79%	10b5-1
Sep 14, 2026 SForm 4/A →	Sep 16, 9:07 am EDT	SIMILARWEB LTD.SMWB	79,591	$8.53	$679,236	4,253,500	−1.84%	10b5-1
Sep 14, 2026 SForm 4 →	Sep 16, 7:01 am EDT	SIMILARWEB LTD.SMWB	79,591	$8.53	$679,236	4,253,500	−1.84%	10b5-1
Sep 14, 2026 SForm 4 →	Sep 16, 6:55 am EDT	SIMILARWEB LTD.SMWB	79,591	$8.53	$679,236	4,253,500	−1.84%	10b5-1
Sep 10, 2026 SForm 4 →	Sep 14, 9:07 am EDT	SIMILARWEB LTD.SMWB	118,200	$8.06	$952,244	4,333,091	−2.66%	10b5-1
Sep 8, 2026 SForm 4 →	Sep 10, 9:28 am EDT	SIMILARWEB LTD.SMWB	147,000	$8.17	$1,200,902	4,451,291	−3.20%	10b5-1
Aug 26, 2026 SForm 4 →	Aug 27, 8:03 am EDT	SIMILARWEB LTD.SMWB	383,127	$9.00	$3,449,641	4,598,291	−7.69%
Aug 26, 2026 MForm 4 →	Aug 27, 8:03 am EDT	SIMILARWEB LTD.SMWB	383,127	$2.60	$994,387	4,738,299	—
Aug 13, 2026 SForm 4 →	Aug 17, 8:38 am EDT	SIMILARWEB LTD.SMWB	709,597	$8.82	$6,255,276	4,598,291	−13.4%
Aug 13, 2026 MForm 4 →	Aug 17, 8:38 am EDT	SIMILARWEB LTD.SMWB	563,492	$1.75	$987,016	4,673,291	—

Reported trades — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Aug 26, 2026 MForm 4 →	Aug 27, 8:03 am EDT	SIMILARWEB LTD.SMWB	383,127	—	—	0	—
Aug 13, 2026 MForm 4 →	Aug 17, 8:38 am EDT	SIMILARWEB LTD.SMWB	563,492	—	—	739,000	—