Butterfly Network, Inc.: which funds bought and sold

Institutions that bought and sold Butterfly Network 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, 143 institutions that filed 13F reports for both quarters added to or opened positions in Butterfly Network, and 94 cut or closed them. Together they added a net 19.4M shares, +13.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 10.0M shares (+29.4%); index fund managers were net buyers of 5.0M shares (+12.1%). 45 opened a new position and 36 sold out entirely.

Bought, Q2 2026 143 institutions, 45 of them new holders Sold, Q2 2026 94 institutions, 36 of them sold out

Net change, all compared +19.4M shares (+13.9%)

Net change, active managers +10.0M shares (+29.4%), 27 bought, 12 sold

Buyers versus sellers

institutions compared, 279

143 bought 42 94 sold

Active managers and hedge funds 27 bought · 12 sold · +10.0M

Index fund managers 10 bought · 1 sold · +5.0M

Other institutions 106 bought · 81 sold · +4.3M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
D. E. Shaw & Co., Inc. Hedge fund	+5.3M +470.6%	6.4M	$53.8M
Hood River Capital Management LLC	+4.6M +53.0%	13.2M	$111M
FMR LLC Active manager	+4.5M +1016.0%	4.9M	$41.3M
Blackrock, Inc. Index funds	+2.9M +17.9%	18.8M	$158M
Goldman Sachs Group Inc	+1.9M +224.1%	2.8M	$23.3M
Kingdon Capital Management, L.L.C.	+1.7M New position	1.7M	$14.3M
Nuveen, LLC	+1.3M +34.8%	5.1M	$42.6M
Voloridge Investment Management, LLC Hedge fund	+1.1M New position	1.1M	$9.1M
Exoduspoint Capital Management, LP Hedge fund	+762K New position	762K	$6.4M
Gilder Gagnon Howe & Co LLC Active manager	+711K +765.2%	804K	$6.8M
Sei Investments Co	+639K +27.8%	2.9M	$24.7M
Two Sigma Investments, LP Hedge fund	+616K +81.3%	1.4M	$11.6M
Calamos Advisors LLC Active manager	+584K New position	584K	$4.9M
Vanguard Portfolio Management LLC Index funds	+545K +29.7%	2.4M	$20.1M
Geode Capital Management, LLC Index funds	+537K +11.2%	5.3M	$45M
Russell Investments Group, Ltd.	+419K +401.4%	524K	$4.4M
Vanguard Capital Management LLC Index funds	+367K +4.5%	8.6M	$72.1M
Deutsche Bank Ag\	+317K +14.0%	2.6M	$21.7M
Invesco Ltd.	+271K +66.6%	677K	$5.7M
Ameriprise Financial Inc	+244K +1127.6%	265K	$2.2M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
D. E. Shaw & Co., Inc. Hedge fund	+5.3M +470.6%	6.4M	$53.8M
FMR LLC Active manager	+4.5M +1016.0%	4.9M	$41.3M
Voloridge Investment Management, LLC Hedge fund	+1.1M New position	1.1M	$9.1M
Exoduspoint Capital Management, LP Hedge fund	+762K New position	762K	$6.4M
Gilder Gagnon Howe & Co LLC Active manager	+711K +765.2%	804K	$6.8M
Two Sigma Investments, LP Hedge fund	+616K +81.3%	1.4M	$11.6M
Calamos Advisors LLC Active manager	+584K New position	584K	$4.9M
Tudor Investment Corp Et Al Hedge fund	+199K +46.2%	631K	$5.3M
Fred Alger Management, LLC Active manager	+143K New position	143K	$1.2M
Acadian Asset Management LLC Active manager	+139K +673.0%	160K	$1.3M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Bank Of America Corp	−2.0M −48.7%	2.1M	$18M
Jane Street Group, LLC	−1.9M Sold out	0	—
Marshall Wace, LLP Hedge fund	−1.8M −79.7%	463K	$3.9M
Millennium Management LLC Hedge fund	−1.3M −38.2%	2.2M	$18.1M
Algert Global LLC Hedge fund	−848K −31.8%	1.8M	$15.3M
Morgan Stanley	−592K −34.4%	1.1M	$9.5M
Jump Financial, LLC	−553K −66.4%	280K	$2.4M
Parkman Healthcare Partners LLC	−544K Sold out	0	—
Fosun International Ltd	−482K −4.5%	10.2M	$86.2M
Dimensional Fund Advisors LP	−412K −17.5%	1.9M	$16.4M
Barclays PLC	−386K −79.5%	100K	$838,664
Manatuck Hill Partners, LLC	−300K Sold out	0	—
Citigroup Inc	−299K −50.4%	295K	$2.5M
Voleon Capital Management LP Hedge fund	−244K −61.9%	150K	$1.3M
Aquatic Capital Management LLC	−226K Sold out	0	—
DNB Asset Management As	−223K −28.6%	557K	$4.7M
Cloudalpha Capital Management Limited/Hong Kong	−218K Sold out	0	—
UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC	−213K −64.9%	115K	$970,152
Stoic Point Capital Management LLC	−209K −35.8%	374K	$3.2M
Susquehanna International Group, LLP	−163K −67.8%	77K	$652,415

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	−1.8M −79.7%	463K	$3.9M
Millennium Management LLC Hedge fund	−1.3M −38.2%	2.2M	$18.1M
Algert Global LLC Hedge fund	−848K −31.8%	1.8M	$15.3M
Voleon Capital Management LP Hedge fund	−244K −61.9%	150K	$1.3M
Schonfeld Strategic Advisors LLC Hedge fund	−162K −60.4%	106K	$895,111
ARK Investment Management LLC Active manager	−142K −2.7%	5.1M	$42.8M
American Century Companies Inc Active manager	−141K Sold out	0	—
Los Angeles Capital Management LLC Active manager	−78K Sold out	0	—
Citadel Advisors LLC Hedge fund	−42K Sold out	0	—
Fisher Asset Management, LLC Active manager	−16K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Kingdon Capital Management, L.L.C.	1.7M	$14.3M
Voloridge Investment Management, LLCHedge fund	1.1M	$9.1M
Exoduspoint Capital Management, LPHedge fund	762K	$6.4M
Calamos Advisors LLCActive manager	584K	$4.9M
Allspring Global Investments Holdings, LLC	174K	$1.4M
Lotus Technology Management, LP	164K	$1.4M
Firstwave Capital Management LLC	145K	$1.2M
Fred Alger Management, LLCActive manager	143K	$1.2M
Verition Fund Management LLCHedge fund	122K	$1M
Davenport & Co LLC	110K	$925,358

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Jane Street Group, LLC	1.9M	$7.8M
Parkman Healthcare Partners LLC	544K	$2.2M
Manatuck Hill Partners, LLC	300K	$1.2M
Aquatic Capital Management LLC	226K	$914,022
Cloudalpha Capital Management Limited/Hong Kong	218K	$880,720
American Century Companies IncActive manager	141K	$568,836
Keenan, LLC	89K	$360,267
Los Angeles Capital Management LLCActive manager	78K	$313,233
Integrated Quantitative Investments LLC	77K	$312,203
Golden State Wealth Management, LLC	48K	$193,920

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 245
Ten largest holders: 58.6%
Index fund managers: 29.2%
Active managers and hedge funds: 27.9%

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	27	12	11	5	+10.0M	+29.4%
Index fund managers	10	1	0	0	+5.0M	+12.1%
Other institutions	106	81	34	31	+4.3M	+6.8%

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 Butterfly Network.

Only managers that filed a holdings report for both quarters are compared (279 here). 7 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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