Quantum Computing Inc.: which funds bought and sold

Institutions that bought and sold Quantum Computing shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 190 institutions that filed 13F reports for both quarters added to or opened positions in Quantum Computing, and 103 cut or closed them. Together they added a net 10.0M shares, +10.8% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 3.4M shares (−40.5%); index fund managers were net buyers of 2.8M shares (+6.2%). 64 opened a new position and 43 sold out entirely.

Bought, Q2 2026 190 institutions, 64 of them new holders Sold, Q2 2026 103 institutions, 43 of them sold out

Net change, all compared +10.0M shares (+10.8%)

Net change, active managers −3.4M shares (−40.5%), 17 bought, 16 sold

Buyers versus sellers

institutions compared, 349

190 bought 56 103 sold

Active managers and hedge funds 17 bought · 16 sold · −3.4M

Index fund managers 8 bought · 3 sold · +2.8M

Other institutions 165 bought · 84 sold · +10.5M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Penserra Capital Management LLC	+3.6M +108.3%	7.0M	$67.7M
Defiance Etfs, LLC	+2.5M +56.5%	7.0M	$66.3M
Blackrock, Inc. Index funds	+1.6M +9.9%	17.7M	$172M
National Bank Of Canada	+1.3M +948.0%	1.5M	$14.1M
Morgan Stanley	+971K +41.9%	3.3M	$31.9M
Bank Of New York Mellon Corp	+953K +93.2%	2.0M	$19.2M
Focus Financial Network, Inc.	+730K +402.6%	912K	$8.8M
BNP Paribas Financial Markets	+730K +214.1%	1.1M	$10.4M
UBS Group AG	+730K +55.4%	2.0M	$19.8M
Geode Capital Management, LLC Index funds	+622K +13.2%	5.3M	$51.6M
Clear Street Group Inc.	+586K +69.6%	1.4M	$13.9M
Susquehanna International Group, LLP	+485K +70.5%	1.2M	$11.4M
State Street Corp Index funds	+404K +9.0%	4.9M	$47.7M
Barclays PLC	+366K +961.1%	404K	$3.9M
Van Eck Associates Corp	+346K +35.6%	1.3M	$12.8M
Landscape Capital Management, L.L.C.	+316K +484.1%	381K	$3.7M
Millennium Management LLC Hedge fund	+273K +313.4%	360K	$3.5M
Raymond James Financial Inc	+248K +31.4%	1.0M	$10.1M
Citigroup Inc	+183K +259.6%	253K	$2.5M
Charles Schwab Investment Management Inc Index funds	+150K +10.0%	1.6M	$15.9M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	+273K +313.4%	360K	$3.5M
Brevan Howard Capital Management LP Hedge fund	+135K +736.3%	154K	$1.5M
Algert Global LLC Hedge fund	+132K +42.0%	445K	$4.3M
American Century Companies Inc Active manager	+125K New position	125K	$1.2M
Graham Capital Management, L.P. Hedge fund	+80K New position	80K	$776,000
Balyasny Asset Management L.P. Hedge fund	+57K New position	57K	$550,601
Price T Rowe Associates Inc Active manager	+48K +21.0%	275K	$2.7M
Winton Group Ltd Hedge fund	+41K New position	41K	$397,700
Marshall Wace, LLP Hedge fund	+39K New position	39K	$377,748
Sculptor Capital LP Hedge fund	+25K New position	25K	$242,500

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Marex Group Ltd	−2.2M −48.7%	2.3M	$22.3M
HRT Financial LP	−1.3M Sold out	0	—
Squarepoint Ops LLC Hedge fund	−949K −70.2%	403K	$3.9M
Jump Financial, LLC	−911K −97.0%	28K	$274,549
Citadel Advisors LLC Hedge fund	−722K −83.9%	139K	$1.3M
Renaissance Technologies LLC Hedge fund	−668K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−642K −97.4%	17K	$164,153
Quantbot Technologies LP Hedge fund	−411K Sold out	0	—
Quadrature Capital Ltd Hedge fund	−209K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−198K −51.5%	186K	$1.8M
Capital Fund Management S.A. Hedge fund	−196K −11.5%	1.5M	$14.6M
Walleye Trading LLC	−179K Sold out	0	—
Vanguard Portfolio Management LLC Index funds	−144K −2.1%	6.6M	$63.7M
D. E. Shaw & Co., Inc. Hedge fund	−136K −18.9%	583K	$5.7M
Headlands Technologies LLC	−122K −44.1%	155K	$1.5M
Goldman Sachs Group Inc	−119K −13.1%	789K	$7.7M
Group One Trading LLC	−103K Sold out	0	—
Virtu Financial LLC	−92K Sold out	0	—
Simplex Trading, LLC	−88K −52.7%	79K	$761,779
Bouvel Investment Partners, LLC	−72K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Squarepoint Ops LLC Hedge fund	−949K −70.2%	403K	$3.9M
Citadel Advisors LLC Hedge fund	−722K −83.9%	139K	$1.3M
Renaissance Technologies LLC Hedge fund	−668K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−642K −97.4%	17K	$164,153
Quantbot Technologies LP Hedge fund	−411K Sold out	0	—
Quadrature Capital Ltd Hedge fund	−209K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−198K −51.5%	186K	$1.8M
Capital Fund Management S.A. Hedge fund	−196K −11.5%	1.5M	$14.6M
D. E. Shaw & Co., Inc. Hedge fund	−136K −18.9%	583K	$5.7M
Franklin Resources Inc Active manager	−64K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
American Century Companies IncActive manager	125K	$1.2M
Moors & Cabot, Inc.	104K	$1M
State Of New Jersey Common Pension Fund D	99K	$955,809
Graham Capital Management, L.P.Hedge fund	80K	$776,000
Varcov Co.	65K	$627,231
Simplicity Wealth,Llc	58K	$562,872
Scoggin Management LP	58K	$557,750
Balyasny Asset Management L.P.Hedge fund	57K	$550,601
Optiver Holding B.V.	56K	$542,385
Kkm Financial LLC	63K	$510,122

Sold out

largest by value

Institution	Shares	Value March 31, 2026
HRT Financial LP	1.3M	$8.7M
Renaissance Technologies LLCHedge fund	668K	$4.6M
Quantbot Technologies LPHedge fund	411K	$2.8M
Quadrature Capital LtdHedge fund	209K	$1.4M
Walleye Trading LLC	179K	$1.2M
Group One Trading LLC	103K	$708,530
Virtu Financial LLC	92K	$629,000
Bouvel Investment Partners, LLC	72K	$496,235
Alphagrep Uk Ltd	72K	$493,207
Credit Agricole S A	64K	$439,770

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 311
Ten largest holders: 63.4%
Index fund managers: 47.1%
Active managers and hedge funds: 4.8%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	17	16	7	9	−3.4M	−40.5%
Index fund managers	8	3	1	0	+2.8M	+6.2%
Other institutions	165	84	56	34	+10.5M	+27.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Quantum Computing.

Only managers that filed a holdings report for both quarters are compared (349 here). 11 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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