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Similarweb (SMWB) Institutional Ownership

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$8.10 -0.25 (-2.99%)
As of 01:40 PM Eastern
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Institutional Ownership Changes (13F Filings) for Similarweb (NYSE:SMWB)

Current
Institutional Ownership
Percentage
57.59%
Number of
Institutional Buyers
(last 12 months)
42
Total
Institutional Inflows
(last 12 months)
$89.14M
Number of
Institutional Sellers
(last 12 months)
16
Total
Institutional Outflows
(last 12 months)
$11.96M
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SMWB Institutional Buying and Selling by Quarter

Similarweb Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/19/2026 Wellington Management Group LLP3,624,685$22.22M0.0%+22.2%4.138%
6/12/2026 Militia Capital Management LLC236,000$616K0.1%N/A0.269%
5/28/2026 Lavelle Capital LP202,727$529K0.3%N/A0.231%
5/19/2026 Bank of America Corp DE63,985$167K0.0%+475.3%0.073%
5/14/2026 Renaissance Technologies LLC739,673$1.93M0.0%+104.6%0.844%
5/13/2026 Militia Capital Management LLC219,264$572K0.1%N/A0.250%
5/4/2026 Y.D. More Investments Ltd1,151,298$3.01M0.1%-1.7%1.314%
2/18/2026 Sphera Management Technology Funds Ltd480,000$3.60M1.2%+3.7%0.566%
2/18/2026 Numerai GP LLC117,949$883K0.1%N/A0.139%
2/18/2026 Millennium Management LLC357,807$2.68M0.0%-30.0%0.422%
2/18/2026 Engineers Gate Manager LP62,800$470K0.0%-33.5%0.074%
2/18/2026 Boothbay Fund Management LLC11,961$90K0.0%N/A0.014%
2/17/2026 Lazard Asset Management LLC13,736$103K0.0%-30.5%0.016%
2/17/2026 Trexquant Investment LP108,038$809K0.0%-21.1%0.127%
2/17/2026 Jump Financial LLC63,321$474K0.0%+37.7%0.075%
2/17/2026 Public Employees Retirement System of Ohio60,419$453K0.0%+29.5%0.071%
2/17/2026 Russell Investments Group Ltd.148,339$1.11M0.0%-2.2%0.175%
2/17/2026 ExodusPoint Capital Management LP29,931$224K0.0%N/A0.035%
2/17/2026 Blair William & Co. IL71,044$532K0.0%-30.8%0.084%
2/17/2026 Persistent Asset Partners Ltd180,000$1.35M0.6%N/A0.212%
2/16/2026 Verition Fund Management LLC35,844$268K0.0%-47.0%0.042%
2/16/2026 S Squared Technology LLC775,161$5.81M2.2%+12.9%0.913%
2/13/2026 Marshall Wace LLP292,483$2.19M0.0%+25.4%0.345%
2/13/2026 State Street Corp370,001$2.77M0.0%+16.3%0.436%
2/13/2026 UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC43,261$324K0.0%N/A0.051%
2/12/2026 HRT Financial LP58,354$437K0.0%+24.0%0.069%
2/12/2026Brooklyn Investment Group11,732$85K0.0%N/A0.014%
2/12/2026 New York State Common Retirement Fund852,915$6.39M0.0%+0.4%1.005%
2/12/2026 Nuveen LLC1,520,398$11.39M0.0%+2.5%1.792%
2/11/2026 ARK Investment Management LLC236,425$1.77M0.0%+2.8%0.279%
2/11/2026 Fox Run Management L.L.C.19,528$146K0.0%N/A0.023%
2/11/2026 CenterBook Partners LP960,996$7.20M0.4%-18.6%1.132%
2/9/2026 Penn Capital Management Company LLC1,588,680$11.91M0.9%-3.5%1.872%
2/9/2026 Royce & Associates LP537,406$4.03M0.0%+8.7%0.633%
2/6/2026 Nano Cap New Millennium Growth Fund L P167,500$1.26M1.1%N/A0.197%
2/5/2026 Phoenix Financial Ltd.4,285,786$32.10M0.3%+43.2%5.050%
2/4/2026 First Eagle Investment Management LLC645,647$4.84M0.0%+18.5%0.761%
2/2/2026 Oppenheimer & Co. Inc.89,390$670K0.0%-10.3%0.105%
1/29/2026 UBS Group AG536,549$4.02M0.0%+71.4%0.632%
1/27/2026 Zurcher Kantonalbank Zurich Cantonalbank31,592$237K0.0%+50.2%0.037%
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1/21/2026 Y.D. More Investments Ltd1,171,298$8.37M0.4%-1.0%1.380%
1/1/2026 JPMorgan Chase & Co.21,525$200K0.0%-83.7%0.025%
11/24/2025 Penn Capital Management Company LLC1,646,094$15.32M1.2%+299.4%1.940%
11/17/2025 Wexford Capital LP6,860$64K0.0%N/A0.008%
11/17/2025 Verition Fund Management LLC67,573$628K0.0%-22.2%0.080%
11/17/2025 Public Employees Retirement System of Ohio46,673$434K0.0%+302.4%0.055%
11/17/2025 Millennium Management LLC510,921$4.75M0.0%+65.7%0.602%
11/17/2025 Larson Financial Group LLC2,686$25K0.0%N/A0.003%
11/17/2025 Bank of America Corp DE56,213$523K0.0%+390.5%0.066%
11/14/2025 Lazard Asset Management LLC19,761$184K0.0%+31.9%0.023%
11/14/2025 Wellington Management Group LLP2,457,805$22.86M0.0%+163.6%2.896%
11/14/2025 Portolan Capital Management LLC1,179,000$10.97M0.6%+62.0%1.389%
11/13/2025 Menora Mivtachim Holdings LTD.3,208,394$29.84M0.2%+37.9%3.780%
11/13/2025 UBS Group AG312,987$2.91M0.0%+701.6%0.369%
11/13/2025 Connor Clark & Lunn Investment Management Ltd.944,552$8.78M0.0%+2.6%1.113%
11/13/2025 Legal & General Group Plc43,374$403K0.0%+13.7%0.051%
11/13/2025 Russell Investments Group Ltd.151,635$1.41M0.0%+100.6%0.179%
11/13/2025 Blair William & Co. IL102,623$954K0.0%-5.1%0.121%
11/12/2025 Alpha Family Trust658,935$6.13M2.9%-22.6%0.776%
11/12/2025 ARK Investment Management LLC230,053$2.14M0.0%-5.1%0.271%
11/12/2025 Cresset Asset Management LLC10,468$97K0.0%-65.2%0.012%
11/12/2025 Legato Capital Management LLC109,711$1.02M0.1%+41.0%0.129%
11/12/2025 First Eagle Investment Management LLC545,001$5.07M0.0%+221.5%0.642%
11/12/2025 Royce & Associates LP494,328$4.60M0.0%N/A0.582%
11/10/2025 Y.D. More Investments Ltd1,182,798$11.34M0.6%-4.2%1.394%
11/7/2025 CenterBook Partners LP1,180,966$10.98M0.5%-18.1%1.392%
11/7/2025 JPMorgan Chase & Co.21,525$200K0.0%-83.7%0.025%
11/6/2025 Essex Investment Management Co. LLC380,793$3.54M0.5%+45.9%0.449%
11/6/2025 Oppenheimer & Co. Inc.99,602$926K0.0%-4.6%0.117%
11/5/2025Fullcircle Wealth LLC15,000$140K0.0%N/A0.018%
11/3/2025 New York State Common Retirement Fund849,745$7.90M0.0%N/A1.001%
11/3/2025 Federated Hermes Inc.31,000$288K0.0%-35.4%0.037%
10/30/2025 Migdal Insurance & Financial Holdings Ltd.3,106,157$28.89M0.3%+3.3%3.660%
8/15/2025 Tidal Investments LLC61,574$483K0.0%+66.4%0.073%
8/15/2025 Man Group plc26,700$209K0.0%N/A0.031%
8/15/2025 Lazard Asset Management LLC14,984$117K0.0%-25.4%0.018%
8/15/2025 Engineers Gate Manager LP102,311$802K0.0%+375.8%0.121%
8/15/2025 BNP Paribas Financial Markets43,914$344K0.0%-40.5%0.052%
8/15/2025 Bank of America Corp DE11,461$90K0.0%-91.8%0.014%
8/15/2025 Ameriprise Financial Inc.143,478$1.13M0.0%-1.6%0.169%
8/14/2025 PDT Partners LLC98,388$771K0.0%+3.9%0.116%
8/14/2025California State Teachers Retirement System49,654$389K0.0%+29.7%0.059%
8/14/2025Nebula Research & Development LLC18,647$146K0.0%N/A0.022%
8/14/2025 Menora Mivtachim Holdings LTD.2,326,742$18.24M0.1%+3.6%2.742%
8/14/2025 Qube Research & Technologies Ltd111,929$878K0.0%N/A0.132%
8/14/2025 Hood River Capital Management LLC78,446$615K0.0%+20.7%0.092%
8/14/2025 Federated Hermes Inc.48,000$376K0.0%+52.4%0.057%
8/14/2025 Formula Growth Ltd.100,000$784K0.3%N/A0.118%
8/13/2025 Jump Financial LLC185,820$1.46M0.0%N/A0.219%
8/13/2025 Cresset Asset Management LLC30,103$236K0.0%-13.7%0.035%
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8/13/2025 Marshall Wace LLP170,942$1.34M0.0%-52.4%0.201%
8/13/2025 Russell Investments Group Ltd.75,603$593K0.0%-72.1%0.089%
8/12/2025 Scalar Gauge Management LLC1,116,343$8.75M5.0%-8.0%1.315%
8/12/2025Jefferies Financial Group Inc.36,000$282K0.0%N/A0.042%
8/12/2025 CenterBook Partners LP1,441,810$11.30M0.6%+78.5%1.699%
8/12/2025 JPMorgan Chase & Co.132,218$1.04M0.0%-37.5%0.156%
8/12/2025 Magnetar Financial LLC34,633$272K0.0%N/A0.041%
8/12/2025 Swiss National Bank87,474$686K0.0%+9.8%0.103%
8/12/2025 P.A.W. Capital Corp240,000$1.88M3.6%-20.0%0.283%
8/11/2025 Y.D. More Investments Ltd1,234,298$9.68M0.7%-11.8%1.454%


SMWB Institutional Ownership - Frequently Asked Questions

During the previous two years, 122 institutional investors and hedge funds held shares of Similarweb. The most heavily invested institutionals were Phoenix Financial Ltd. ($32.10M), Menora Mivtachim Holdings LTD. ($29.84M), Migdal Insurance & Financial Holdings Ltd. ($28.89M), Schonfeld Strategic Advisors LLC ($22.54M), Wellington Management Group LLP ($22.22M), Jennison Associates LLC ($15.65M), and Penn Capital Management Company LLC ($11.91M).Learn more on Similarweb's institutional investors.

57.59% of Similarweb's stock is owned by institutional investors. Learn more on SMWB's institutional investor holdings.

Of the 111 institutional investors that purchased Similarweb's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Wellington Management Group LLP ($3.07M), Jennison Associates LLC ($1.89M), Schonfeld Strategic Advisors LLC ($1.59M), Menora Mivtachim Holdings LTD. ($1.52M), T. Rowe Price Investment Management Inc. ($1.41M), Migdal Insurance & Financial Holdings Ltd. ($1.39M), and CenterBook Partners LP ($1.39M).

Institutional investors have bought a total of 11,059,911 shares in the last 24 months. This purchase volume represents approximately $89.14M in transactions.

Of the 16 institutional investors that sold Similarweb's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: CenterBook Partners LP ($480.81K), JPMorgan Chase & Co. ($221.39K), Alpha Family Trust ($192.73K), Millennium Management LLC ($153.11K), Y.D. More Investments Ltd ($83K), Penn Capital Management Company LLC ($57.41K), and Verition Fund Management LLC ($51.03K).

Institutional investors have sold a total of 1,410,265 shares in the last 24 months. This volume of shares sold represents approximately $11.96M in transactions.


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Institutional ownership data for NYSE:SMWB is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/19/2026. New 13F filings are added each quarter as they're published.
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