XFOR · Insider trading · 13F holders · Congress trades
X4 Pharmaceuticals, Inc (XFOR)
Who is buying and selling XFOR: 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
- 15
- Insider buys, 90 days
- $12K
- Insider sales, 90 days
- $354K
- Congress trades, 12 months
- 0
XFOR at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 3 XFOR insiders filed 1 open-market purchase worth $12K and 3 sales worth $354K on SEC Form 4.
- 15 13F filers hold XFOR among their 50 largest positions, worth $254.9M combined, including Joseph Edelman. The biggest bets by portfolio weight are Empery Asset Management, LP (37.4%), Kalehua Capital Management LLC (12.5%) and Rosalind Advisors, Inc. (5.6%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
- No member of Congress has disclosed a trade in XFOR.
- XFOR last closed at $3.36 on Oct 29, 2026.
XFOR insider trading
Between Aug 1, 2026 and Oct 29, 2026, 3 XFOR insiders filed 1 open-market purchase worth $12K and 3 sales worth $354K on SEC Form 4.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 19, 2026 | Craig Adam R | Executive Chairman, Director | Buy | 4,600 | $2.58 | $12K | SEC |
| Oct 5, 2026 | Kirske David | Chief Financial Officer | Sale | 11,767 | $2.86 | $34K | SEC |
| Aug 13, 2026 | Craig Adam R | Executive Chairman, Director | Sale | 47,436 | $4.44 | $211K | SEC |
| Aug 13, 2026 | Volpone John | President | Sale | 24,576 | $4.44 | $109K | SEC |
Who owns XFOR? Hedge funds and superinvestors
15 13F filers hold XFOR among their 50 largest positions, worth $254.9M combined, including Joseph Edelman. The biggest bets by portfolio weight are Empery Asset Management, LP (37.4%), Kalehua Capital Management LLC (12.5%) and Rosalind Advisors, Inc. (5.6%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
Superinvestors holding XFOR: Joseph Edelman 0.6%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Bain Capital Life Sciences Investors, LLCAsset manager | 2.2% | $37.2M | 7,967,454 | +0.0% shares | Q2 2026 |
| Joseph EdelmanHedge fund | 0.6% | $37.0M | 7,933,491 | +17.7% shares | Q2 2026 |
| Saturn V Capital Management LPHedge fund | 4.7% | $32.6M | 6,973,343 | +8.0% shares | Q2 2026 |
| Empery Asset Management, LPHedge fund | 37.4% | $32.4M | 6,930,591 | -22.5% shares | Q2 2026 |
| Deep Track Capital, LPHedge fund | 0.4% | $27.5M | 5,878,757 | -7.3% shares | Q2 2026 |
| Kalehua Capital Management LLCHedge fund | 12.5% | $17.4M | 3,722,840 | +0.0% shares | Q2 2026 |
| NEA Management Company, LLCHedge fund | 1.0% | $15.1M | 3,233,743 | +0.0% shares | Q2 2026 |
| Rosalind Advisors, Inc.Investment manager | 5.6% | $15.0M | 3,214,766 | +0.0% shares | Q2 2026 |
| Trails Edge Capital Partners, LPHedge fund | 1.9% | $12.0M | 2,571,478 | +0.0% shares | Q2 2026 |
| Bvf Inc/ilInvestment manager | 0.3% | $10.4M | 2,233,742 | +0.0% shares | Q2 2026 |
| Venrock Adviser, LLCHedge fund | 0.3% | $9.0M | 1,934,253 | +485.2% shares | Q2 2026 |
| Samsara Biocapital, LLCHedge fund | 0.5% | $6.5M | 1,395,587 | -23.8% shares | Q2 2026 |
| Verdad Advisers, LPAsset manager | 1.6% | $1.6M | 352,093 | — | Q2 2026 |
| Stonepine Capital Management, LLCHedge fund | 0.8% | $1.1M | 224,989 | -32.9% shares | Q2 2026 |
| Caxton CorpInvestment manager | 3.9% | $73K | 15,557 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 15). Screen XFOR in the grand portfolio →
XFOR stock trades by members of Congress
No member of Congress has disclosed a trade in XFOR.
XFOR questions and answers
Are insiders buying XFOR stock?
Between Aug 1, 2026 and Oct 29, 2026, 3 XFOR insiders filed 1 open-market purchase worth $12K and 3 sales worth $354K on SEC Form 4.
Which hedge funds own XFOR?
15 13F filers hold XFOR among their 50 largest positions, worth $254.9M combined, including Joseph Edelman. The biggest bets by portfolio weight are Empery Asset Management, LP (37.4%), Kalehua Capital Management LLC (12.5%) and Rosalind Advisors, Inc. (5.6%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
Has Congress traded XFOR?
No member of Congress has disclosed a trade in XFOR.
Who is the largest holder of XFOR?
Among 13F filers, Bain Capital Life Sciences Investors, LLC reports the largest XFOR position, $37.2M (7,967,454 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Empery Asset Management, LP's: 37.4% of its portfolio.
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