XLO · Insider trading · 13F holders · Congress trades
Xilio Therapeutics Inc (XLO)
Who is buying and selling XLO: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 8
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
XLO at a glance
- No open-market insider purchases or sales of XLO were filed in the last 90 days.
- 8 13F filers hold XLO among their 50 largest positions, worth $21.8M combined. The biggest bets by portfolio weight are Stonepine Capital Management, LLC (1.6%), Bain Capital Life Sciences Investors, LLC (0.4%) and Sio Capital Management, LLC (0.3%). In their latest 13Fs, 1 manager opened a new position and 1 added to one.
- No member of Congress has disclosed a trade in XLO.
XLO insider trading
No open-market insider purchases or sales of XLO were filed in the last 90 days.
Who owns XLO? Hedge funds and superinvestors
8 13F filers hold XLO among their 50 largest positions, worth $21.8M combined. The biggest bets by portfolio weight are Stonepine Capital Management, LLC (1.6%), Bain Capital Life Sciences Investors, LLC (0.4%) and Sio Capital Management, LLC (0.3%). In their latest 13Fs, 1 manager opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Bain Capital Life Sciences Investors, LLCAsset manager | 0.4% | $6.4M | 664,021 | +0.0% shares | Q2 2026 |
| Gilead Sciences, Inc.Corporation | 0.4% | $6.2M | 650,389 | +0.0% shares | Q2 2026 |
| Frazier Life Sciences Management, L.P.Hedge fund | 0.1% | $4.0M | 422,505 | +0.0% shares | Q2 2026 |
| Stonepine Capital Management, LLCHedge fund | 1.6% | $2.2M | 225,994 | +252.2% shares | Q2 2026 |
| Sio Capital Management, LLCHedge fund | 0.3% | $1.5M | 152,464 | — | Q2 2026 |
| Merck & Co., Inc.Corporation | 0.2% | $1.0M | 105,982 | +0.0% shares | Q2 2026 |
| AJU IB Investment Co., Ltd.Investment manager | 1.3% | $401K | 47,695 | New | Q1 2026 |
| Velan Capital Investment Management LPHedge fund | 0.1% | $137K | 14,285 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 7, Q1 2026: 1). Screen XLO in the grand portfolio →
XLO stock trades by members of Congress
No member of Congress has disclosed a trade in XLO.
XLO questions and answers
Are insiders buying XLO stock?
No open-market insider purchases or sales of XLO were filed in the last 90 days.
Which hedge funds own XLO?
8 13F filers hold XLO among their 50 largest positions, worth $21.8M combined. The biggest bets by portfolio weight are Stonepine Capital Management, LLC (1.6%), Bain Capital Life Sciences Investors, LLC (0.4%) and Sio Capital Management, LLC (0.3%). In their latest 13Fs, 1 manager opened a new position and 1 added to one.
Has Congress traded XLO?
No member of Congress has disclosed a trade in XLO.
Who is the largest holder of XLO?
Among 13F filers, Bain Capital Life Sciences Investors, LLC reports the largest XLO position, $6.4M (664,021 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Stonepine Capital Management, LLC's: 1.6% of its portfolio.
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