undamentalytics Newsletter
Sign in

Xbiotech Inc.: which funds bought and sold

Institutions that bought and sold Xbiotech 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, 8 institutions that filed 13F reports for both quarters added to or opened positions in Xbiotech, and 15 cut or closed them. Together they sold a net 24K shares, −1.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 30K shares (+9.9%); index fund managers were net buyers of 381 shares (+0.0%). 3 opened a new position and 3 sold out entirely.

Bought, Q2 2026 8 institutions, 3 of them new holders Sold, Q2 2026 15 institutions, 3 of them sold out
Net change, all compared −24K shares (−1.2%)
Net change, active managers +30K shares (+9.9%), 3 bought, 3 sold

Buyers versus sellers

institutions compared, 38
Active managers and hedge funds 3 bought · 3 sold · +30K
Index fund managers 2 bought · 4 sold · +381
Other institutions 3 bought · 8 sold · −55K

Biggest buyers

by change in shares held
Institution Change in shares Shares June 30, 2026 Value
Gsa Capital Partners LLP +31K New position 31K $71,000
Citadel Advisors LLC Hedge fund +29K New position 29K $67,142
Blackrock, Inc. Index funds +28K +9.6% 321K $738,636
Renaissance Technologies LLC Hedge fund +19K +85.7% 42K $95,825
Qube Research & Technologies Ltd Hedge fund +15K +79.6% 34K $77,211
Vanguard Fiduciary Trust Co Index funds +789 +0.9% 92K $212,440
Barclays PLC +94 New position 94 $216
Royal Bank Of Canada +92 +8.8% 1,132 $3,000

Biggest sellers

by change in shares held
Institution Change in shares Shares June 30, 2026 Value
Jane Street Group, LLC −49K −80.9% 11K $26,394
Millennium Management LLC Hedge fund −26K −24.8% 79K $182,459
Morgan Stanley −18K −10.7% 148K $340,124
Geode Capital Management, LLC Index funds −17K −7.3% 214K $492,755
Bank Of America Corp −13K −35.2% 24K $54,715
Northern Trust Corp Index funds −9,829 −12.9% 66K $152,394
Squarepoint Ops LLC Hedge fund −6,457 −15.7% 35K $79,941
Xtx Topco Ltd −4,821 −26.9% 13K $30,084
Rhumbline Advisers Index funds −928 Sold out 0 —
Vanguard Capital Management LLC Index funds −789 −0.4% 200K $460,419
Connor, Clark & Lunn Investment Management Ltd. −720 −2.5% 28K $64,269
BNP Paribas Financial Markets −700 −2.6% 26K $60,867
American Century Companies Inc Active manager −500 −2.6% 18K $42,276
Arax Advisory Partners −15 Sold out 0 —
Optiver Holding B.V. −8 Sold out 0 —

New positions

largest by value
InstitutionSharesValue June 30, 2026
Gsa Capital Partners LLP 31K $71,000
Citadel Advisors LLCHedge fund 29K $67,142
Barclays PLC 94 $216

Sold out

largest by value
InstitutionSharesValue March 31, 2026
Rhumbline AdvisersIndex funds 928 $2,180
Arax Advisory Partners 15 $35
Optiver Holding B.V. 8 $19

Who holds the shares

13F holdings at June 30, 2026
Institutions reporting
36
Ten largest holders
75.3%
of 13F-reported shares
Index fund managers
48.8%
of 13F-reported shares
Active managers and hedge funds
16.9%
of 13F-reported shares
Buying and selling by type of institution, March 31, 2026 to June 30, 2026
TypeBoughtSoldNewSold outNet change in sharesNet %
Active managers and hedge funds 3 3 1 0 +30K +9.9%
Index fund managers 2 4 0 1 +381 +0.0%
Other institutions 3 8 2 2 −55K −7.6%

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.

← Back to Xbiotech Inc. · Insiders · Politicians