Latest Period
Q1 2026
Security Snapshot
SIMILARWEB LTD. - Ordinary shares, par value 0.01 NIS (SMWB) Institutional Ownership
CUSIP: M84137104
13F Institutional Holders and Ownership History from Q2 2021 to Q1 2026
Institutions Reporting
79
Shares (Excl. Options)
42,247,512
Price
$2.61
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- Security type / class
- Equity / Ordinary shares, par value 0.01 NIS
- Symbol
- SMWB on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 42,247,512
- Total 13F value
- $116,094,750
- Portfolio coverage rank
- 0%
- Share change
- -7,738,300
- Value change
- -$57,458,622
- Number of holders
- 79
- Shares outstanding
- 86,901,701
- SEC-reported price per share
- $2.85
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SMWB - SIMILARWEB LTD. - Ordinary shares, par value 0.01 NIS is tracked under CUSIP M84137104.
- 79 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 99 to 79 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $372,629,267 to $116,094,750.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 79 institutions filings for Q1 2026.
Security key
M84137104
Latest holder period
Q1 2026
13F holders
79
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
SMWB full holder history
SIMILARWEB LTD. SEC filings
SIMILARWEB LTD. company facts
SIMILARWEB LTD. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP M84137104:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
SMWB
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Viola Growth Management Fund 2 Ltd. | 13% | $82,486,236 | 10,810,778 | Harel Beit-On | 31 Dec 2024 | |||
| Phoenix Financial Ltd. | 2.9% | -43% | $13,264,676 | -$8,853,942 | 2,502,769 | -40% | Phoenix Financial Ltd. | 18 Feb 2026 |
As of 31 Mar 2026, 79 institutional investors reported holding 42,247,512 shares of SIMILARWEB LTD. - Ordinary shares, par value 0.01 NIS (SMWB). This represents 49% of the company’s total 86,901,701 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
44%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| NASPERS LTD | 13% | 11,173,265 | 0% | 12% | $29,162,222 |
| MENORA MIVTACHIM HOLDINGS LTD. | 4.6% | 4,015,494 | 0% | 0.05% | $10,480,439 |
| ION Crossover Partners Ltd | 3.5% | 3,030,826 | 0% | 21% | $7,910,456 |
| Ulysses Management LLC | 3.5% | 2,998,474 | 0% | 2.9% | $7,826,017 |
| WELLINGTON MANAGEMENT GROUP LLP | 3.4% | 2,966,757 | -1.2% | 0% | $7,743,235 |
| S SQUARED TECHNOLOGY, LLC | 1.8% | 1,600,000 | +106% | 1.6% | $4,176,000 |
| CenterBook Partners LP | 1.5% | 1,325,113 | +38% | 0.19% | $3,458,545 |
| Y.D. More Investments Ltd | 1.3% | 1,151,298 | -1.7% | 0.33% | $8,338,601 |
| MILLENNIUM MANAGEMENT LLC | 0.95% | 825,763 | +131% | 0% | $2,155,241 |
| MIRABELLA FINANCIAL SERVICES LLP | 0.91% | 792,664 | 0.2% | $2,068,853 | |
| RENAISSANCE TECHNOLOGIES LLC | 0.85% | 739,673 | +105% | 0% | $1,930,547 |
| Alpha Family Trust | 0.76% | 658,935 | 0% | 1.1% | $2,260,148 |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.74% | 645,465 | 0% | 0.23% | $1,678,209 |
| CDC Financial, Inc. | 0.74% | 639,014 | +351% | 1.4% | $1,667,827 |
| MARSHALL WACE, LLP | 0.73% | 638,188 | +118% | 0% | $1,665,671 |
| Sphera Management Technology Funds Ltd | 0.71% | 615,000 | +28% | 0.91% | $1,605,150 |
| MORGAN STANLEY | 0.68% | 591,863 | +131% | 0% | $1,544,762 |
| Connor, Clark & Lunn Investment Management Ltd. | 0.61% | 533,634 | -33% | 0% | $1,392,785 |
| P.A.W. CAPITAL CORP | 0.58% | 500,000 | +108% | 3.6% | $1,305,000 |
| CITADEL ADVISORS LLC | 0.55% | 476,005 | +138% | 0% | $1,242,373 |
| Qube Research & Technologies Ltd | 0.48% | 416,146 | +2410% | 0% | $1,086,141 |
| ACADIAN ASSET MANAGEMENT LLC | 0.47% | 405,607 | +156% | 0% | $1,050,000 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | 0.45% | 390,000 | +133% | 0.96% | $1,017,900 |
| Penn Capital Management Company, LLC | 0.41% | 360,366 | -77% | 0.07% | $940,555 |
| ARK Investment Management LLC | 0.41% | 352,070 | +49% | 0.01% | $918,903 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
20
Latest
Q1 2026
Rows shown
1-20 of 20
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 42,247,512 | $116,094,750 | -$57,458,622 | $2.61 | 79 |
| 2025 Q4 | 49,801,699 | $372,629,267 | +$1,795,087 | $7.49 | 99 |
| 2025 Q3 | 45,724,161 | $425,584,367 | +$32,862,772 | $9.30 | 94 |
| 2025 Q2 | 39,421,999 | $309,072,075 | -$25,108,591 | $7.84 | 109 |
| 2025 Q1 | 44,869,261 | $371,050,037 | +$11,060,980 | $8.27 | 109 |
| 2024 Q4 | 41,334,757 | $585,694,097 | +$81,455,239 | $14.17 | 112 |
| 2024 Q3 | 35,350,723 | $312,488,678 | +$44,808,638 | $8.84 | 93 |
| 2024 Q2 | 30,383,807 | $236,058,514 | +$2,468,377 | $7.77 | 76 |
| 2024 Q1 | 30,002,420 | $269,664,457 | +$24,271,694 | $9.00 | 73 |
| 2023 Q4 | 27,327,571 | $148,483,812 | -$2,713,075 | $5.33 | 54 |
| 2023 Q3 | 33,175,176 | $214,079,411 | +$32,261,423 | $6.48 | 51 |
| 2023 Q2 | 28,061,800 | $184,076,669 | -$3,184,390 | $6.56 | 46 |
| 2023 Q1 | 28,524,216 | $192,826,355 | +$1,605,090 | $6.76 | 41 |
| 2022 Q4 | 28,985,254 | $184,506,669 | +$2,355,742 | $6.43 | 45 |
| 2022 Q3 | 27,260,764 | $160,023,552 | -$1,398,711 | $5.86 | 43 |
| 2022 Q2 | 27,377,253 | $225,856,900 | -$12,112,701 | $8.25 | 45 |
| 2022 Q1 | 28,312,445 | $366,690,000 | +$3,417,483 | $12.95 | 42 |
| 2021 Q4 | 27,949,255 | $500,553,000 | +$30,410,579 | $17.91 | 44 |
| 2021 Q3 | 14,519,959 | $303,896,319 | -$6,442,609 | $20.93 | 34 |
| 2021 Q2 | 14,926,736 | $294,056,000 | +$294,056,003 | $19.70 | 45 |