There is a long list of 213 institutional holders of IRBT within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of IRBT by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-IRBT table below, the initial column indicates the name of each top institutional holder of IRBT, with a link to that fund's top holdings. The next columns indicate the amount of IRBT stock held by each of the institutional holders of IRBT, followed by the IRBT position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
BlackRock Inc.	4,763,619	$184,352	12/31/2023
IRBT	4,763,619	$184,352	12/31/2023
Vanguard Group Inc.	2,986,963	$115,595	12/31/2023
IRBT	2,986,963	$115,595	12/31/2023
Primecap Management Co. CA	1,761,755	$68,180	12/31/2023
IRBT	1,761,755	$68,180	12/31/2023
State Street Corp	1,129,934	$43,728	12/31/2023
IRBT	1,129,934	$43,728	12/31/2023
Segantii Capital Management Ltd	684,397	$26,486	12/31/2023
IRBT	684,397	$26,486	12/31/2023
Alpine Associates Management Inc.	596,832	$23,097	12/31/2023
IRBT	596,832	$23,097	12/31/2023
Geode Capital Management LLC	595,427	$23,046	12/31/2023
IRBT	595,427	$23,046	12/31/2023
Morgan Stanley	560,772	$21,702	12/31/2023
IRBT	560,772	$21,702	12/31/2023
Charles Schwab Investment Management Inc.	495,151	$19,162	12/31/2023
IRBT	495,151	$19,162	12/31/2023
Dimensional Fund Advisors LP	472,507	$18,286	12/31/2023
IRBT	472,507	$18,286	12/31/2023
Marshall Wace LLP	384,787	$14,891	12/31/2023
IRBT	384,787	$14,891	12/31/2023
Hsbc Holdings PLC	329,872	$12,763	12/31/2023
IRBT	329,872	$12,763	12/31/2023
Mirae Asset Global Investments Co. Ltd.	314,696	$12,179	12/31/2023
IRBT	314,696	$12,179	12/31/2023
Alliancebernstein L.P.	313,129	$12,118	12/31/2023
IRBT	313,129	$12,118	12/31/2023
Calamos Advisors LLC		$11,485	12/31/2023
IRBT	276,798	$10,712	12/31/2023
Call	20,400	$773	12/31/2023
Northern Trust Corp	290,955	$11,260	12/31/2023
IRBT	290,955	$11,260	12/31/2023
Bank of America Corp DE		$10,250	12/31/2023
IRBT	132,958	$5,145	12/31/2023
Call	131,900	$5,105	12/31/2023
Bank of New York Mellon Corp	251,162	$9,720	12/31/2023
IRBT	251,162	$9,720	12/31/2023
Ameriprise Financial Inc.	250,265	$9,685	12/31/2023
IRBT	250,265	$9,685	12/31/2023
Goldman Sachs Group Inc.	232,974	$9,016	12/31/2023
IRBT	232,974	$9,016	12/31/2023
Deutsche Bank AG	207,492	$8,030	12/31/2023
IRBT	207,492	$8,030	12/31/2023
Millennium Management LLC		$8,022	12/31/2023
Put	327,100	$12,659	12/31/2023
IRBT	281,707	$10,902	12/31/2023
Call	252,700	$9,779	12/31/2023
CNH Partners LLC	200,802	$7,771	12/31/2023
IRBT	200,802	$7,771	12/31/2023
Baillie Gifford & Co.	189,026	$7,315	12/31/2023
IRBT	189,026	$7,315	12/31/2023
Legal & General Group Plc	185,014	$7,160	12/31/2023
IRBT	185,014	$7,160	12/31/2023
Nuveen Asset Management LLC	171,380	$6,632	12/31/2023
IRBT	171,380	$6,632	12/31/2023
Norges Bank	171,125	$6,623	12/31/2023
IRBT	171,125	$6,623	12/31/2023
Magnetar Financial LLC	167,490	$6,482	12/31/2023
IRBT	167,490	$6,482	12/31/2023
Principal Financial Group Inc.	144,932	$5,609	12/31/2023
IRBT	144,932	$5,609	12/31/2023
Jane Street Group LLC		$5,429	12/31/2023
Call	182,200	$7,051	12/31/2023
Put	126,900	$4,911	12/31/2023
IRBT	84,977	$3,289	12/31/2023
Invesco Ltd.	106,071	$4,105	12/31/2023
IRBT	106,071	$4,105	12/31/2023
Public Sector Pension Investment Board	104,895	$4,059	12/31/2023
IRBT	104,895	$4,059	12/31/2023
HRT Financial LP	104,691	$4,051	12/31/2023
IRBT	104,691	$4,051	12/31/2023
Allianz Asset Management GmbH	101,374	$3,923	12/31/2023
IRBT	101,374	$3,923	12/31/2023
Barclays PLC	95,416	$3,691	12/31/2023
IRBT	95,416	$3,691	12/31/2023
Credit Suisse AG	93,239	$3,608	12/31/2023
IRBT	93,239	$3,608	12/31/2023
Citadel Advisors LLC		$3,437	12/31/2023
IRBT	73,418	$2,841	12/31/2023
Call	31,900	$1,235	12/31/2023
Put	16,500	$639	12/31/2023
Rhumbline Advisers	85,639	$3,314	12/31/2023
IRBT	85,639	$3,314	12/31/2023
Gabelli Funds LLC	76,326	$2,954	12/31/2023
IRBT	76,326	$2,954	12/31/2023
Renaissance Technologies LLC	75,100	$2,906	12/31/2023
IRBT	75,100	$2,906	12/31/2023
Qube Research & Technologies Ltd	69,608	$2,694	12/31/2023
IRBT	69,608	$2,694	12/31/2023
California State Teachers Retirement System	57,938	$2,242	12/31/2023
IRBT	57,938	$2,242	12/31/2023
Capital Fund Management S.A.	53,665	$2,077	12/31/2023
IRBT	53,665	$2,077	12/31/2023
Swiss National Bank	51,900	$2,009	12/31/2023
IRBT	51,900	$2,009	12/31/2023
Stifel Financial Corp	50,197	$1,943	12/31/2023
IRBT	50,197	$1,943	12/31/2023
ARP Americas LP	43,013	$1,665	12/31/2023
IRBT	43,013	$1,665	12/31/2023
UBS Asset Management Americas Inc.	40,279	$1,559	12/31/2023
IRBT	40,279	$1,559	12/31/2023
Walleye Trading LLC		$1,513	12/31/2023
Call	53,800	$2,082	12/31/2023
Put	14,700	$569	12/31/2023
Healthcare of Ontario Pension Plan Trust Fund	35,000	$1,354	12/31/2023
IRBT	35,000	$1,354	12/31/2023
Gamco Investors INC. ET AL	34,525	$1,336	12/31/2023
IRBT	34,525	$1,336	12/31/2023