Who Owns SIMILARWEB LTD (SMWB)? -- Institutional Holders (2026-03-31)

116 institutions reported holding $116.6M of SIMILARWEB LTD (SMWB) in SEC 13F filings for 2026-03-31. Largest institutional holders: NASPERS LTD ($29.2M), MENORA MIVTACHIM HOLDINGS LTD. ($10.5M), Y.D. More Investments Ltd ($8.3M), ION Crossover Partners Ltd ($7.9M), Ulysses Management LLC ($7.8M). Source: SEC Form 13F.

RankInstitutionValueSharesChange
1NASPERS LTD$29.2M11.2MHold
2MENORA MIVTACHIM HOLDINGS LTD.$10.5M4.0MHold
3Y.D. More Investments Ltd$8.3M1.2MTrimmed
4ION Crossover Partners Ltd$7.9M3.0MHold
5Ulysses Management LLC$7.8M3.0MHold
6WELLINGTON MANAGEMENT GROUP LLP$7.7M3.0MTrimmed
7S Squared Technology, LLC$4.2M1.6MAdded
8CenterBook Partners LP$3.5M1.3MAdded
9Alpha Family Trust$2.3M658,935Hold
10MILLENNIUM MANAGEMENT LLC$2.2M825,763Added
11MIRABELLA FINANCIAL SERVICES LLP$2.1M792,664New
12RENAISSANCE TECHNOLOGIES LLC$1.9M739,673Added
13Herald Investment Management Ltd$1.7M645,465Hold
14CDC Financial, Inc.$1.7M639,014Added
15MARSHALL WACE, LLP$1.7M638,188Added
16Sphera Management Technology Funds Ltd$1.6M615,000Added
17CITADEL ADVISORS LLC$1.6M600,105Added
18MORGAN STANLEY$1.5M591,863Added
19Connor, Clark & Lunn Investment Management Ltd.$1.4M533,634Trimmed
20P.A.W. CAPITAL CORP$1.3M500,000Added
21Qube Research & Technologies Ltd$1.1M416,146Added
22ACADIAN ASSET MANAGEMENT LLC$1.1M405,607Added
23NANO CAP NEW MILLENNIUM GROWTH FUND L P$1.0M390,000Added
24PEAK6 LLC$996,383381,756Added
25PENN CAPITAL MANAGEMENT CO INC$940,555360,366Trimmed

Source: SEC Form 13F filings · as of 2026-03-31