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XBITNasdaqPharmaceutical PreparationsFiscal year ends December 31

XBiotech Inc.

Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 13, 2026
$2.00−0.12 (-5.66%)

Close on Oct 19, 2026

Market cap
$60.98M
P/E (TTM)
–
Dividend yield
–

Ownership

Institutional holdings as of Jun 30, 2026, from 13F filings

Held by institutions
6.5%
2M of 30M shares
Institutional holders
36
4 new, 3 sold out
Net institutional buying
-0M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only

Shares held by institutions

Holders of more than 5%

Latest Schedule 13D (active) or 13G (passive) filed by each holder

HolderShares% of classFilingAs of
John Simard5,719,77517.70%13G (passive) amendmentDec 31, 2025
Thomas Gut3,914,111–13G (passive) amendmentDec 31, 2023
W. Thorpe McKenzie3,006,2599.76%13G (passive) amendmentDec 31, 2025

Top institutional holders

13F holdings as of Jun 30, 2026

HolderShares% of XBITValueChange% of portfolio
BlackRock, Inc.321,1461.05%$738.64K+28,0420.00%
Geode Capital Management, LLC214,1160.70%$492.76K−16,9040.00%
Vanguard Capital Management LLC200,1820.66%$460.42K−7890.00%
RBF Capital, LLC198,5010.65%$456.55K–0.02%
Morgan Stanley147,8800.49%$340.12K−17,6740.00%
Bridgeway Capital Management, LLC98,4470.32%$226.43K–0.00%
Vanguard Fiduciary Trust Co92,3650.30%$212.44K+7890.00%
Millennium Management LLC79,3300.26%$182.46K−26,2100.00%
State Street Corp73,0060.24%$167.91K–0.00%
Northern Trust Corp66,2580.22%$152.39K−9,8290.00%
Empowered Funds, LLC59,5470.20%$136.96K–0.00%
Renaissance Technologies LLC41,6630.14%$95.83K+19,2250.00%
Bank of New York Mellon Corp39,3550.13%$90.52K–0.00%
Dimensional Fund Advisors LP36,0530.12%$82.99K–0.00%
Squarepoint Ops LLC34,7570.11%$79.94K−6,4570.00%
Qube Research & Technologies Ltd33,5700.11%$77.21K+14,8790.00%
Gsa Capital Partners Llp30,6540.10%$71New0.00%
Citadel Advisors LLC29,1920.10%$67.14KNew0.00%
Connor, Clark & Lunn Investment Management Ltd.27,9430.09%$64.27K−7200.00%
Bnp Paribas Arbitrage, Snc26,4640.09%$60.87K−7000.00%

Institutional buying and selling by quarter

Positions opened, added to, reduced and closed by 13F filers

QuarterHoldersShares held% of sharesNew / addedReduced / closedShares boughtShares sold
Q2 2026362M6.5%4 / 512 / 30M0M
Q1 2026372M6.5%6 / 813 / 80M1M
Q4 2025412M8.2%4 / 916 / 81M1M
Q3 2025483M9.6%4 / 1023 / 90M1M
Q2 2025533M11.2%16 / 1219 / 181M2M
Q1 2025554M14.7%9 / 922 / 60M0M
Q4 2024535M15.5%10 / 1812 / 70M0M
Q3 2024505M15.9%10 / 236 / 52M0M
Q2 2024465M14.8%13 / 1810 / 122M1M
Q1 2024464M14.1%10 / 1610 / 31M0M
Q4 2023394M11.7%5 / 158 / 30M0M
Q3 2023373M11.0%3 / 910 / 40M0M

Top mutual fund and ETF holders

Latest monthly portfolio reports (Form N-PORT)

FundShares% of XBITValue% of fundAs of
Vanguard Extended Market Index Fund200,1820.66%$460.42K0.00%Jun 30, 2026
Fidelity Extended Market Index Fund110,5020.36%$267.41K0.00%May 31, 2026
iShares Micro-Cap ETF78,5910.26%$180.76K0.01%Jun 30, 2026
EA Bridgeway Omni Small-Cap Value ETF59,5470.20%$136.96K0.01%Jun 30, 2026
Ultra-Small Company Fund38,9000.13%$89.47K0.09%Jun 30, 2026
Fidelity Total Market Index Fund35,1540.12%$85.07K0.00%May 31, 2026
Fidelity Series Total Market Index Fund27,5070.09%$66.57K0.00%May 31, 2026
Fidelity Nasdaq Composite Index Fund16,9600.06%$41.04K0.00%May 31, 2026
Avantis U.S. Small Cap Equity ETF13,2280.04%$32.01K0.00%May 31, 2026
JNL/DFA U.S. Small Cap Fund6,0660.02%$13.95K0.00%Jun 30, 2026
1290 VT Micro Cap Portfolio5,2900.02%$12.17K0.01%Jun 30, 2026
Avantis U.S. Small Cap Value ETF4,8710.02%$11.79K0.00%May 31, 2026
AST Small-Cap Equity Portfolio2,6600.01%$6.12K0.00%Jun 30, 2026
Avantis U.S. Small Cap Value Fund2820.00%$6820.00%May 31, 2026

Officers, directors and major owners

People who filed Forms 3, 4 or 5 in the last two years

NameRoleShares owned% of sharesLatest filing
John SimardChief Executive Officer, Director, 10% owner3,823,16612.54%Mar 19, 2025
David Spencer SofferDirector––Nov 12, 2025
Thomas Martin KuendigDirector300,0000.98%Nov 12, 2025
Tevi David TroyDirector––Nov 12, 2025
Craig Evan RademakerDirector170,9850.56%Nov 12, 2025

Insider trades

Common stock transactions reported on Form 4, newest first

InsiderDateTransactionSharesPriceValueShares after
W. Thorpe McKenzie
Director, 10% owner
Dec 16, 2021Option exercise+250,000$10.00$2.50M2,810,964
W. Thorpe McKenzie
Director, 10% owner
Dec 16, 2021Tax withholding−213,493$11.71$2.50M2,597,471
John Simard
Chief Executive Officer, Director, 10% owner
Oct 18, 2021Sale−33,000$13.07$431.31K3,823,166
John Simard
Chief Executive Officer, Director, 10% owner
Oct 15, 2021Sale−17,000$13.32$226.44K3,856,166
John Simard
Chief Executive Officer, Director, 10% owner
Oct 14, 2021Sale−21,125$12.90$272.51K3,873,166
John Simard
Chief Executive Officer, Director, 10% owner
Oct 13, 2021Sale−10,875$12.83$139.53K3,962,452
John Simard
Chief Executive Officer, Director, 10% owner
Oct 12, 2021Sale−18,000$12.77$229.86K3,973,166
John Simard
Chief Executive Officer, Director, 10% owner
Oct 7, 2021Sale−39,286$12.45$489.11K3,923,166
John Simard
Chief Executive Officer, Director, 10% owner
Oct 6, 2021Sale−10,714$12.53$134.25K3,962,452
John Simard
Chief Executive Officer, Director, 10% owner
Oct 5, 2021Sale−14,218$12.66$180.00K3,973,166
John Simard
Chief Executive Officer, Director, 10% owner
Oct 4, 2021Sale−23,681$13.08$309.75K3,987,384
John Simard
Chief Executive Officer, Director, 10% owner
Oct 1, 2021Sale−19,684$13.23$260.42K4,011,065
John Simard
Chief Executive Officer, Director, 10% owner
Sep 30, 2021Sale−18,558$13.07$242.55K4,030,749
John Simard
Chief Executive Officer, Director, 10% owner
Sep 29, 2021Sale−16,396$13.41$219.87K4,049,307
John Simard
Chief Executive Officer, Director, 10% owner
Sep 28, 2021Sale−6,263$14.27$89.37K4,065,703
John Simard
Chief Executive Officer, Director, 10% owner
Sep 27, 2021Sale−29,890$14.81$442.67K4,071,966
John Simard
Chief Executive Officer, Director, 10% owner
Sep 24, 2021Sale−11,418$14.49$165.45K4,101,856
John Simard
Chief Executive Officer, Director, 10% owner
Sep 23, 2021Sale−9,892$14.68$145.21K4,113,274
John Simard
Chief Executive Officer, Director, 10% owner
Sep 22, 2021Sale−19,669$15.14$297.79K4,123,166
John Simard
Chief Executive Officer, Director, 10% owner
Sep 21, 2021Sale−16,860$15.24$256.95K4,142,835
John Simard
Chief Executive Officer, Director, 10% owner
Sep 20, 2021Sale−13,471$15.06$202.87K4,159,695
John Simard
Chief Executive Officer, Director, 10% owner
Jul 14, 2021Sale−50,000$18.15$907.50K4,173,166
Peter Libby
Director
Jul 9, 2021Option exercise+25,000$7.76$194.00K25,000
Donald H. MacAdam
Director
Jul 9, 2021Option exercise+10,000$4.40$44.00K10,000
John Simard
Chief Executive Officer, Director, 10% owner
Mar 22, 2021Option exercise+500,000$7.50$3.75M4,223,166
Street Financial S.A. Bay
10% owner
Dec 18, 2020Sale−1,173,033$18.78$22.03M1,981,515
Street Financial S.A. Bay
10% owner
Dec 2, 2020Sale−182,836$18.42$3.37M3,154,548
W. Thorpe McKenzie
Director, 10% owner
Nov 19, 2020Sale−375,000$18.30$6.86M2,560,964
John Simard
Chief Executive Officer, Director, 10% owner
Sep 18, 2020Other−500,000––3,723,166
Sushma Shivaswamy
Chief Scientific Officer
Sep 15, 2020Sale−20,668$20.00$413.36K0
Sushma Shivaswamy
Chief Scientific Officer
Sep 15, 2020Option exercise+20,668$7.50$155.01K20,668
Sushma Shivaswamy
Chief Scientific Officer
Sep 10, 2020Option exercise+19,332$7.50$144.99K19,332
Sushma Shivaswamy
Chief Scientific Officer
Sep 10, 2020Sale−19,332$20.01$386.83K0
Queena Han
VP Finance & HR
Sep 1, 2020Option exercise+30,000$4.24$127.20K30,000
Queena Han
VP Finance & HR
Sep 1, 2020Option exercise+27,692$4.16$115.20K57,692
Queena Han
VP Finance & HR
Aug 24, 2020Sale−5,000$19.65$98.25K0
Queena Han
VP Finance & HR
Aug 24, 2020Option exercise+18,700$7.50$140.25K18,700
Queena Han
VP Finance & HR
Aug 24, 2020Sale−18,700$19.65$367.46K0
Queena Han
VP Finance & HR
Aug 24, 2020Option exercise+12,308$4.16$51.20K12,308
Queena Han
VP Finance & HR
Aug 24, 2020Sale−12,500$19.65$245.62K0
Queena Han
VP Finance & HR
Aug 24, 2020Option exercise+3,333$4.14$13.80K3,333
Queena Han
VP Finance & HR
Aug 24, 2020Sale−3,333$19.65$65.49K0
Queena Han
VP Finance & HR
Aug 24, 2020Option exercise+12,500$5.26$65.75K12,500
Queena Han
VP Finance & HR
Aug 24, 2020Sale−12,308$19.65$241.85K0
Queena Han
VP Finance & HR
Aug 24, 2020Option exercise+5,000$15.00$75.00K5,000
Queena Han
VP Finance & HR
Aug 17, 2020Sale−1,300$19.30$25.09K0
Queena Han
VP Finance & HR
Aug 17, 2020Option exercise+1,300$7.50$9.75K1,300
Street Financial S.A. Bay
10% owner
Feb 19, 2020Sale−1,662,616$6.38$10.61M3,337,384
John Simard
Chief Executive Officer, Director, 10% owner
Feb 12, 2020Returned to company−2,103,894$30.00$63.12M4,223,166
W. Thorpe McKenzie
Director, 10% owner
Feb 12, 2020Returned to company−15,874$30.00$476.22K31,864
W. Thorpe McKenzie
Director, 10% owner
Feb 12, 2020Returned to company−33,252$30.00$997.56K66,748
W. Thorpe McKenzie
Director, 10% owner
Feb 12, 2020Returned to company−3,825$30.00$114.75K7,676
W. Thorpe McKenzie
Director, 10% owner
Feb 12, 2020Returned to company−1,462,636$30.00$43.88M2,935,964
Jan-Paul Waldin
Director
Feb 12, 2020Returned to company−99,757$30.00$2.99M200,243
Thomas Gut
10% owner
Feb 12, 2020Returned to company−1,949,929$30.00$58.50M3,914,111
Thomas Gut
10% owner
Feb 12, 2020Returned to company−1,947,584$30.00$58.43M3,916,456
Thomas Gut
10% owner
Feb 12, 2020Returned to company−1,868,870$30.00$56.07M3,995,170
W. Thorpe McKenzie
Director, 10% owner
Feb 12, 2020Returned to company−15,214$30.00$456.42K32,524
W. Thorpe McKenzie
Director, 10% owner
Feb 12, 2020Returned to company−1,401,856$30.00$42.06M2,996,744
W. Thorpe McKenzie
Director, 10% owner
Feb 12, 2020Returned to company−3,665$30.00$109.95K7,835

Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.