SIMILARWEB LTD SMWB
SHS · Common Stock · CUSIP M84137104
- SectorTechnology
- IndustryServices-Computer Programming, Data Processing, Etc.
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 76.4m as of 2022-12-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $6.37. Options: 5 managers hold calls ($4.2m notional), 4 hold puts ($1.5m).
Trends to Q4 2022
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 46 |
| Q4 2022 | 47 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2022 | $1.0m | $3.6m | 3.53 |
| Q4 2022 | $4.2m | $1.5m | 0.36 |
Biggest buyers
| Portolan Capital Management, LLC | New | +888.2k |
| Union Investments & Development Ltd. | New | +642.0k |
| NORTH RUN CAPITAL, LP | New | +375.0k |
| Baader Bank Aktiengesellschaft | New | +247.0k |
| ARK Investment Management LLC | Added | +104.5k |
| Horrell Capital Management, Inc. | New | +86.0k |
| Veritable, L.P. | New | +35.0k |
| Belvedere Trading LLC | New | +29.5k |
| SIMPLEX TRADING, LLC | Added | +28.7k |
| STATE STREET CORP | Added | +22.1k |
Biggest sellers
| BAMCO INC /NY/ | Reduced | -411.0k |
| MILLENNIUM MANAGEMENT LLC | Sold out | -398.1k |
| Phoenix Financial Ltd. | Sold out | -330.6k |
| BESSEMER GROUP INC | Sold out | -312.7k |
| Ulysses Management LLC | Reduced | -146.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Sold out | -145.5k |
| MARSHALL WACE, LLP | Reduced | -90.0k |
| BLAIR WILLIAM & CO/IL | Reduced | -83.0k |
| WOLVERINE TRADING, LLC | Sold out | -56.8k |
| ETF MANAGERS GROUP, LLC | Sold out | -50.3k |
Biggest calls
| Phoenix Financial Ltd. | Added | $4.2m647.7k shares |
| CITADEL ADVISORS LLC | Reduced | $8.4k1.3k shares |
| GROUP ONE TRADING LLC | New | $6.4k1.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| SIMPLEX TRADING, LLC | New | $0100 shares |
Biggest puts
| SIMPLEX TRADING, LLC | Reduced | $972.0k151.3k shares |
| CITADEL ADVISORS LLC | Reduced | $291.9k45.4k shares |
| Belvedere Trading LLC | New | $221.8k34.5k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Viola Growth Management Fund 2 Ltd. 13G · exempt (held before listing) filed 2025-02-12 | 13.2% |
Fell to 5% or below in the last year: Phoenix Financial Ltd. (2.9%, 2026-02-24)
Insider purchases and sales in Q4 2022
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported in Q4 2022.
Holders, Q4 2022
| Manager | Shares | Change |
|---|---|---|
| NASPERS LTD 9.46% of their portfolio | 11.2m $71.8m | Unchanged |
| ION Crossover Partners Ltd 87.08% of their portfolio | 5.8m $37.1m | Unchanged |
| Ulysses Management LLC 4.28% of their portfolio | 2.3m $14.6m | Reduced -146.5k |
| Alpha Family Trust 9.76% of their portfolio | 1.7m $10.8m | Unchanged |
| Migdal Insurance & Financial Holdings Ltd. 0.23% of their portfolio | 1.6m $10.2m | Reduced -50.0k |
| Y.D. More Investments Ltd 2.06% of their portfolio | 1.5m $8.3m | First filing |
| Portolan Capital Management, LLC 0.57% of their portfolio | 888.2k $5.7m | New |
| Union Investments & Development Ltd. 2.60% of their portfolio | 642.0k $4.4m | New |
| MEITAV INVESTMENT HOUSE LTD 0.05% of their portfolio | 550.8k $3.0m | Unchanged |
| NORTH RUN CAPITAL, LP 5.54% of their portfolio | 375.0k $2.4m | New |
| ARK Investment Management LLC 0.02% of their portfolio | 335.0k $2.2m | Added +104.5k |
| Old Well Partners, LLC 1.65% of their portfolio | 296.3k $1.9m | Added +4.6k |
| BLAIR WILLIAM & CO/IL 0.01% of their portfolio | 286.5k $1.8m | Reduced -83.0k |
| Premier Fund Managers Ltd 0.06% of their portfolio | 265.9k $1.5m | Unchanged |
| BlackRock Inc. 0.00% of their portfolio | 248.7k $1.6m | Reduced -45.5k |
| Baader Bank Aktiengesellschaft 0.15% of their portfolio | 247.0k $1.6m | New |
| TUDOR INVESTMENT CORP ET AL 0.02% of their portfolio | 136.2k $876.0k | Added +858 |
| BAMCO INC /NY/ 0.00% of their portfolio | 128.9k $828.7k | Reduced -411.0k |
| STATE STREET CORP 0.00% of their portfolio | 111.6k $717.8k | Added +22.1k |
| Horrell Capital Management, Inc. 0.18% of their portfolio | 86.0k $553.0k | New |
| SIMPLEX TRADING, LLC 0.02% of their portfolio | 59.8k $384.0k | Added +28.7k |
| Swiss National Bank 0.00% of their portfolio | 44.4k $285.4k | Unchanged |
| Veritable, L.P. 0.00% of their portfolio | 35.0k $225.1k | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 33.2k $213.5k | Unchanged |
| Belvedere Trading LLC 0.11% of their portfolio | 29.5k $189.7k | New |
| MARSHALL WACE, LLP 0.00% of their portfolio | 23.2k $149.0k | Reduced -90.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 22.4k $144.0k | Added +6.4k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 20.3k $130.5k | Unchanged |
| Yarbrough Capital, LLC 0.01% of their portfolio | 17.2k $110.6k | Unchanged |
| VANGUARD GROUP INC 0.00% of their portfolio | 17.1k $109.9k | Unchanged |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 17.0k $109.4k | Reduced -8.8k |
| PDT Partners, LLC 0.02% of their portfolio | 16.7k $107.1k | New |
| MORGAN STANLEY 0.00% of their portfolio | 15.3k $98.5k | Added +2.1k |
| Caprock Group, LLC 0.01% of their portfolio | 12.5k $80.4k | Unchanged |
| LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio | 7.5k $47.0k | New |
| ANTIPODES PARTNERS Ltd 0.00% of their portfolio | 5.3k $33.0k | New |
| Legal & General Group Plc 0.00% of their portfolio | 4.2k $26.8k | Added +1.6k |
| CITIGROUP INC 0.00% of their portfolio | 4.1k $26.5k | Reduced -16.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 3.1k $20.2k | Unchanged |
| Harel Insurance Investments & Financial Services Ltd. 0.00% of their portfolio | 2.2k $14.0k | Reduced -233 |
| UBS Group AG 0.00% of their portfolio | 2.0k $12.6k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.3k $8.6k | Reduced -22.5k |
| SIGNATUREFD, LLC 0.00% of their portfolio | 447 $2.9k | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 300 $2.0k | Reduced -34.4k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 57 $0 | Added +56 |
| FMR LLC 0.00% of their portfolio | 6 $39 | Unchanged |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio | 0 $0 | Unchanged |