Similarweb Ownership | Who Owns Similarweb?

Similarweb Ownership Summary

Similarweb is owned by 8.90% institutional investors, 17.18% insiders, and 73.93% retail investors. Naspers is the largest institutional shareholder, holding 12.90% of SMWB shares. Wellington Intl Small Cap Research is the top mutual fund, with 1.28% of its assets in Similarweb shares.

SMWB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Similarweb	8.90%	17.18%	73.93%
Sector	Technology Stocks	53.83%	15.00%	31.18%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Naspers	11.17M	12.90%	$29.16M
Menora mivtachim	4.02M	4.64%	$10.48M
Ulysses management	3.00M	3.46%	$7.83M
Wellington management group llp	2.97M	3.43%	$7.74M
S squared	1.60M	1.85%	$4.18M
Centerbook partners lp	1.33M	1.53%	$3.46M
Y.d. more investments	1.15M	1.33%	$8.34M
Millennium management	825.76K	0.95%	$2.16M
Renaissance	739.67K	0.85%	$1.93M
Alpha family trust	658.93K	0.76%	$2.26M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Naspers	11.17M	11.53%	$29.16M
P.a.w. capital	500.00K	3.55%	$1.30M
Scalar gauge management	441.74K	2.09%	$4.11M
S squared	1.60M	1.58%	$4.18M
Alpha family trust	658.93K	1.10%	$2.26M
Ulysses management	3.00M	0.98%	$7.83M
Nano cap new millennium growth fund l p	390.00K	0.95%	$1.02M
Sphera management technology funds	615.00K	0.90%	$1.61M
Y.d. more investments	1.15M	0.33%	$8.34M
Herald investment management	645.47K	0.23%	$1.68M

Top Buyers

Holder	Shares	% Assets	Change
S squared	1.60M	1.58%	824.84K
Millennium management	825.76K	0.00%	467.96K
Qube research	416.15K	0.00%	399.56K
Renaissance	739.67K	0.00%	378.20K
Centerbook partners lp	1.33M	0.19%	364.12K

Top Sellers

Holder	Shares	% Assets	Change
Migdal insurance & financial	-	-	-3.11M
Jennison associates	-	-	-1.89M
Nuveen	-	-	-1.52M
T. rowe price investment management	-	-	-1.41M
Cooper creek partners management	-	-	-1.19M

New Positions

Holder	Shares	% Assets	Change	Value
Schonfeld strategic advisors	289.17K	0.01%	289.17K	$754.74K
Xtx topco	228.88K	0.01%	228.88K	$597.38K
Gsa capital partners llp	152.10K	0.02%	152.10K	$397.00K
Susquehanna fundamental investments	125.62K	0.01%	125.62K	$327.88K
Quadrature capital	94.23K	0.00%	94.23K	$245.95K

Sold Out

Holder	Change
Coldstream capital management	-4.00
Northwestern mutual wealth management	-12.00
Farther finance advisors	-23.00
Assetmark	-48.00
State of wyoming	-544.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	30	-70.87%	7,704,440	-83.46%	8	0.30%	19	-58.70%	8	-75.76%
Dec 31, 2025	68	-36.45%	26,494,074	-42.06%	30	1.05%	34	-22.73%	17	-50.00%
Sep 30, 2025	104	-15.45%	44,037,164	8.87%	52	2.21%	43	-34.85%	33	10.00%
Jun 30, 2025	123	0.82%	40,459,014	-9.97%	48	1.62%	65	12.07%	31	-24.39%
Mar 31, 2025	4	-96.58%	11,449,221	-72.29%	13	0.54%	2	-97.37%	1	-95.83%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Wellington Intl Small Cap Research	1.13M	1.28%	186.26K
Vanguard International Explorer Inv	1.11M	1.26%	191.21K
CREF Total Global Stock Account R3	1.01M	1.16%	-
CREF Stock R3	941.33K	1.11%	78.41K
Penn Capital Small Cap Equity	834.14K	1.01%	-
Jennison SMid Cap Core Equity	832.08K	1.00%	-
PGIM Jennison Small Company A	832.08K	1.00%	-
T. Rowe Price Small-Cap Value	769.67K	0.93%	-106.17K
Herald Ord	645.47K	0.74%	-
First Eagle US Small Cap Strategy	567.63K	0.69%	92.21K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 26, 2026	Offer Or	Chief Executive Officer	Sell	$351.17K
Aug 26, 2026	Offer Or	Chief Executive Officer	Sell	$1.48M
Aug 26, 2026	Offer Or	Chief Executive Officer	Sell	$1.26M
Aug 26, 2026	Offer Or	Chief Executive Officer	Sell	$354.19K
Aug 13, 2026	Offer Or	Chief Executive Officer	Sell	$1.76M

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	10
2026 Q2	7	-
2026 Q1	-	-
2022 Q1	-	-
2021 Q4	-	-

SMWB Ownership FAQ

Who owns the most shares of Similarweb?

Similarweb’s largest shareholders are Naspers (11.17M shares, 12.90%), Menora mivtachim (4.02M shares, 4.64%), and Ulysses management (3M shares, 3.46%). Together, they hold 21.00% of Similarweb’s total shares outstanding.

Does Blackrock own Similarweb?

BlackRock is not among the top 10 institutional shareholders of Similarweb.

Who is Similarweb’s biggest shareholder by percentage of total assets invested?

Naspers is Similarweb’s biggest shareholder by percentage of total assets invested, with 11.53% of its assets in 11.17M Similarweb shares, valued at 29.16M$.

Who is the top mutual fund holder of Similarweb shares?

Wellington Intl Small Cap Research is the top mutual fund holder of Similarweb shares, with 1.28% of its total shares outstanding invested in 1.13M Similarweb shares.

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