XLO
XILIO THERAP (XLO)
NASDAQ
$8.20+$0.17 (+2.05%)
Price as of Oct 22, 2026 7:30 PM EDT
  • $52.8M
    Market Cap
  • -25.81%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
DEERFIELD MANAGEMENT CO
32.74%
2.2M
+2.2M (+100.00%)
Dec 31, 2021
TAKEDA PHARMACEUTICAL CO LTD
22.42%
1.5M
0 (0.00%)
Sep 30, 2025
RIVERVEST VENTURE MANAGEMENT LLC
21.91%
1.4M
0 (0.00%)
Sep 30, 2024
VANGUARD GROUP INC
19.08%
1.3M
0 (0.00%)
Dec 31, 2025
BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC
10.09%
664,021
0 (0.00%)
Jun 30, 2026
GILEAD SCIENCES, INC.
9.88%
650,389
-8.5M (-1,300.00%)
Mar 31, 2026
ORBIMED ADVISORS LLC
9.00%
592,300
+592,300 (+100.00%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions327.9M (78.58%)
  • Insiders63.9M (15.31%)
  • Mutual Funds25.5M (6.11%)
  • Other0 (0.00%)

Insider Transactions

  • 15.31% (63.9M)
    Current InsiderOwnership (%, shares)
  • 2
    Number of InsiderBuying (last 12 months)
  • $19.6M
    Amount of InsiderBuying (last 12 months)
  • 2
    Number of InsiderSelling (last 12 months)
  • $14,331.14
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Houvras Yariv
CHIEF MEDICAL OFFICER
Award
Oct 01, 2026
$0.00
105,000
$0.00
105,000
Shannon James Samuel
Award
Jun 11, 2026
$0.00
5,000
$0.00
5,000
Bello Akintunde Olatokumbo
Award
Jun 11, 2026
$0.00
5,000
$0.00
5,000
Xu Yuan
Award
Jun 11, 2026
$0.00
5,000
$0.00
5,000
Curran Daniel J.
Award
Jun 11, 2026
$0.00
5,000
$0.00
5,000
Brennan Aoife
Award
Jun 11, 2026
$0.00
5,000
$0.00
5,000
ROSS ROBERT W.
Award
Jun 11, 2026
$0.00
5,000
$0.00
5,000
Bonstein Sara
Award
Jun 11, 2026
$0.00
5,000
$0.00
5,000
Shannon James Samuel
Buy
Mar 26, 2026
$43,950.00
5,000
$8.79
10,000
GILEAD SCIENCES INC
Buy
Feb 13, 2026
$2.0M
3.7M
$0.53
40.4M
Brennan Kevin M.
SVP, FINANCE AND ACCOUNTING
Sell
Jan 02, 2026
$1,174.48
1,826
$0.64
6,371
Frankenfield Christopher James
Chief Financial Officer
Sell
Jan 02, 2026
$4,521.70
7,030
$0.64
24,766
Luptakova Katarina
CHIEF MEDICAL OFFICER
Exempt
Jan 01, 2026
$0.00
16,625
$0.00
33,250
Russo Rene
PRESIDENT AND CEO
Exempt
Jan 01, 2026
$0.00
44,250
$0.00
88,500
Luptakova Katarina
CHIEF MEDICAL OFFICER
Exempt
Jan 01, 2026
$0.00
16,625
$0.00
33,250
Frankenfield Christopher James
Chief Financial Officer
Exempt
Jan 01, 2026
$0.00
19,375
$0.00
38,750
Brennan Kevin M.
SVP, FINANCE AND ACCOUNTING
Exempt
Jan 01, 2026
$0.00
5,000
$0.00
10,000
Frankenfield Christopher James
Chief Financial Officer
Exempt
Jan 01, 2026
$0.00
19,375
$0.00
31,796
Russo Rene
PRESIDENT AND CEO
Exempt
Jan 01, 2026
$0.00
44,250
$0.00
325,422
Brennan Kevin M.
SVP, FINANCE AND ACCOUNTING
Exempt
Jan 01, 2026
$0.00
5,000
$0.00
8,197
Luptakova Katarina
CHIEF MEDICAL OFFICER
Award
Dec 31, 2025
$0.00
451,885
$0.00
451,885
Frankenfield Christopher James
Chief Financial Officer
Award
Dec 31, 2025
$0.00
668,789
$0.00
668,789
Russo Rene
PRESIDENT AND CEO
Award
Dec 31, 2025
$0.00
1.5M
$0.00
1.5M
Brennan Kevin M.
SVP, FINANCE AND ACCOUNTING
Award
Dec 31, 2025
$0.00
95,221
$0.00
95,221
Frankenfield Christopher James
Chief Financial Officer
Award
Nov 21, 2025
$0.00
925,000
$0.00
925,000
Russo Rene
PRESIDENT AND CEO
Award
Nov 21, 2025
$0.00
2.1M
$0.00
2.1M
Frankenfield Christopher James
Chief Financial Officer
Return
Nov 21, 2025
$0.00
155,090
$0.00
0
Luptakova Katarina
CHIEF MEDICAL OFFICER
Award
Nov 21, 2025
$0.00
625,000
$0.00
625,000
Frankenfield Christopher James
Chief Financial Officer
Award
Nov 21, 2025
$0.00
155,090
$0.00
155,090
Brennan Kevin M.
SVP, FINANCE AND ACCOUNTING
Award
Nov 21, 2025
$0.00
131,700
$0.00
131,700