Si-bone, Inc.: which funds bought and sold

Institutions that bought and sold Si-bone 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, 100 institutions that filed 13F reports for both quarters added to or opened positions in Si-bone, and 75 cut or closed them. Together they added a net 4.8M shares, +11.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.9M shares (+12.7%); index fund managers were net buyers of 796K shares (+9.2%). 19 opened a new position and 29 sold out entirely.

Bought, Q2 2026 100 institutions, 19 of them new holders Sold, Q2 2026 75 institutions, 29 of them sold out

Net change, all compared +4.8M shares (+11.2%)

Net change, active managers +1.9M shares (+12.7%), 24 bought, 21 sold

Buyers versus sellers

institutions compared, 193

100 bought 18 75 sold

Active managers and hedge funds 24 bought · 21 sold · +1.9M

Index fund managers 9 bought · 0 sold · +796K

Other institutions 67 bought · 54 sold · +2.2M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
First Light Asset Management, LLC	+2.8M +51.8%	8.1M	$133M
Cadian Capital Management, LP Hedge fund	+1.5M +77.4%	3.3M	$54.6M
First Eagle Investment Management, LLC Active manager	+899K +140.7%	1.5M	$25.1M
Marshall Wace, LLP Hedge fund	+522K +310.6%	690K	$11.3M
Highmark Wealth Management LLC	+265K +165.9%	425K	$6.9M
Blackrock, Inc. Index funds	+248K +7.2%	3.7M	$60M
Gilder Gagnon Howe & Co LLC Active manager	+205K +19.5%	1.3M	$20.4M
Next Century Growth Investors LLC	+201K +52.4%	585K	$9.6M
AQR Capital Management LLC Hedge fund	+196K +339.9%	254K	$4.1M
Granahan Investment Management, LLC	+192K +11.0%	1.9M	$31.5M
Vanguard Portfolio Management LLC Index funds	+135K +32.6%	548K	$8.9M
Geode Capital Management, LLC Index funds	+125K +13.1%	1.1M	$17.6M
Paradigm Capital Management Inc	+107K +9.5%	1.2M	$20.1M
Balyasny Asset Management L.P. Hedge fund	+100K New position	100K	$1.6M
Dimensional Fund Advisors LP	+89K +14.4%	708K	$11.6M
State Street Corp Index funds	+84K +7.5%	1.2M	$19.8M
UBS Group AG	+84K +173.1%	132K	$2.2M
Northern Trust Corp Index funds	+81K +22.6%	439K	$7.2M
Vanguard Capital Management LLC Index funds	+74K +4.2%	1.8M	$30M
Jane Street Group, LLC	+65K New position	65K	$1.1M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Cadian Capital Management, LP Hedge fund	+1.5M +77.4%	3.3M	$54.6M
First Eagle Investment Management, LLC Active manager	+899K +140.7%	1.5M	$25.1M
Marshall Wace, LLP Hedge fund	+522K +310.6%	690K	$11.3M
Gilder Gagnon Howe & Co LLC Active manager	+205K +19.5%	1.3M	$20.4M
AQR Capital Management LLC Hedge fund	+196K +339.9%	254K	$4.1M
Balyasny Asset Management L.P. Hedge fund	+100K New position	100K	$1.6M
Squarepoint Ops LLC Hedge fund	+34K +40.3%	118K	$1.9M
ADAR1 Capital Management, LLC Hedge fund	+32K +257.7%	45K	$734,400
Arrowstreet Capital, Limited Partnership Hedge fund	+32K New position	32K	$514,325
Cinctive Capital Management LP Hedge fund	+28K +29.3%	124K	$2M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Morgan Stanley	−582K −81.6%	131K	$2.1M
Renaissance Technologies LLC Hedge fund	−429K −90.7%	44K	$719,712
Qube Research & Technologies Ltd Hedge fund	−372K Sold out	0	—
Nuveen, LLC	−259K −20.2%	1.0M	$16.7M
Algert Global LLC Hedge fund	−230K Sold out	0	—
Assenagon Asset Management S.A.	−224K Sold out	0	—
Pier Capital, LLC	−213K −44.7%	264K	$4.3M
Citadel Advisors LLC Hedge fund	−188K Sold out	0	—
Goldman Sachs Group Inc	−181K −29.0%	442K	$7.2M
Lazard Asset Management LLC Active manager	−102K Sold out	0	—
Silvercrest Asset Management Group LLC	−86K −6.9%	1.2M	$18.9M
Man Group PLC Hedge fund	−83K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−66K −69.0%	29K	$479,482
Two Sigma Investments, LP Hedge fund	−58K Sold out	0	—
Susquehanna Portfolio Strategies, LLC	−54K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−50K −6.0%	790K	$12.9M
Brown Advisory Inc Active manager	−45K −2.1%	2.1M	$33.9M
Parkman Healthcare Partners LLC	−45K −12.0%	329K	$5.4M
Brevan Howard Capital Management LP Hedge fund	−43K Sold out	0	—
Xtx Topco Ltd	−43K −51.7%	40K	$654,954

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Renaissance Technologies LLC Hedge fund	−429K −90.7%	44K	$719,712
Qube Research & Technologies Ltd Hedge fund	−372K Sold out	0	—
Algert Global LLC Hedge fund	−230K Sold out	0	—
Citadel Advisors LLC Hedge fund	−188K Sold out	0	—
Lazard Asset Management LLC Active manager	−102K Sold out	0	—
Man Group PLC Hedge fund	−83K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−66K −69.0%	29K	$479,482
Two Sigma Investments, LP Hedge fund	−58K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−50K −6.0%	790K	$12.9M
Brown Advisory Inc Active manager	−45K −2.1%	2.1M	$33.9M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Balyasny Asset Management L.P.Hedge fund	100K	$1.6M
Jane Street Group, LLC	65K	$1.1M
Arrowstreet Capital, Limited PartnershipHedge fund	32K	$514,325
Magnetar Financial LLCHedge fund	28K	$452,716
Allstate Corp	28K	$449,224
Entrypoint Capital, LLC	20K	$330,268
Jain Global LLCHedge fund	17K	$279,578
Creative Planning	17K	$276,069
Cerity Partners LLC	16K	$265,086
Dynamic Technology Lab Private Ltd	12K	$191,000

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Qube Research & Technologies LtdHedge fund	372K	$4.7M
Algert Global LLCHedge fund	230K	$2.9M
Assenagon Asset Management S.A.	224K	$2.8M
Citadel Advisors LLCHedge fund	188K	$2.4M
Lazard Asset Management LLCActive manager	102K	$1.3M
Man Group PLCHedge fund	83K	$1M
Two Sigma Investments, LPHedge fund	58K	$734,397
Susquehanna Portfolio Strategies, LLC	54K	$682,550
Brevan Howard Capital Management LPHedge fund	43K	$544,921
Drw Securities, LLC	26K	$326,409

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 167
Ten largest holders: 57.5%
Index fund managers: 19.7%
Active managers and hedge funds: 34.2%

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	24	21	6	9	+1.9M	+12.7%
Index fund managers	9	0	0	0	+796K	+9.2%
Other institutions	67	54	13	20	+2.2M	+10.8%

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 Si-bone.

Only managers that filed a holdings report for both quarters are compared (193 here). 8 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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