LYEL · Insider trading · 13F holders · Congress trades
Lyell Immunopharma, Inc. (LYEL)
Who is buying and selling LYEL: 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
- 12
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $215K
- Congress trades, 12 months
- 0
LYEL at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 6 LYEL insiders filed 9 sales worth $215K on SEC Form 4, and no open-market purchases.
- 12 13F filers hold LYEL among their 50 largest positions, worth $120.5M combined. The biggest bets by portfolio weight are Orland Properties Ltd (5.2%), ARCH Venture Management, LLC (4.1%) and GSK plc (3.5%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- No member of Congress has disclosed a trade in LYEL.
- LYEL last closed at $11.31 on Oct 29, 2026.
LYEL insider trading
Between Aug 1, 2026 and Oct 29, 2026, 6 LYEL insiders filed 9 sales worth $215K on SEC Form 4, and no open-market purchases.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 13, 2026 | Aguirre Jarrad Mattieu | Chief Medical Officer | Sale | 422 | $8.63 | $4K | SEC |
| Sep 10, 2026 | Shook David | Chief Medical Officer | Sale | 500 | $12.70 | $6K | SEC |
| Aug 25, 2026 | Seely Lynn | President and CEO, Director | Sale | 9,589 | $15.54 | $149K | SEC |
| Aug 25, 2026 | Lee Gary K. | Chief Scientific Officer | Sale | 1,457 | $15.54 | $23K | SEC |
| Aug 25, 2026 | Hill Stephen J. | Chief Operating Officer | Sale | 989 | $15.54 | $15K | SEC |
| Aug 11, 2026 | Bulis Veronica Sanchez | VP, Corporate Controller | Sale | 621 | $14.34 | $9K | SEC |
| Aug 11, 2026 | Seely Lynn | President and CEO, Director | Sale | 390 | $14.34 | $6K | SEC |
| Aug 11, 2026 | Lee Gary K. | Chief Scientific Officer | Sale | 131 | $14.34 | $2K | SEC |
| Aug 11, 2026 | Hill Stephen J. | Chief Operating Officer | Sale | 89 | $14.34 | $1K | SEC |
Who owns LYEL? Hedge funds and superinvestors
12 13F filers hold LYEL among their 50 largest positions, worth $120.5M combined. The biggest bets by portfolio weight are Orland Properties Ltd (5.2%), ARCH Venture Management, LLC (4.1%) and GSK plc (3.5%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| ARCH Venture Management, LLCVenture capital | 4.1% | $45.5M | 3,247,162 | +0.0% shares | Q2 2026 |
| GSK plcCorporation | 3.5% | $21.3M | 1,512,659 | +0.0% shares | Q2 2026 |
| Orland Properties LtdInvestment manager | 5.2% | $10.6M | 754,698 | +0.0% shares | Q2 2026 |
| Decheng Capital LLCHedge fund | 1.3% | $9.7M | 692,050 | +0.0% shares | Q2 2026 |
| Almitas Capital LLCHedge fund | 2.0% | $8.2M | 581,407 | +0.6% shares | Q2 2026 |
| Foresite Capital Management V, LLCHedge fund | 1.8% | $6.7M | 476,386 | -0.1% shares | Q2 2026 |
| Opaleye Management Inc.Hedge fund | 0.4% | $4.8M | 344,025 | +334.9% shares | Q2 2026 |
| venBio Partners LLCHedge fund | 0.9% | $4.7M | 337,697 | +0.0% shares | Q2 2026 |
| Alphabet Inc.Corporation | 0.0% | $4.1M | 293,256 | +0.0% shares | Q2 2026 |
| HSG Holding LtdInvestment manager | 0.2% | $2.1M | 152,299 | +0.0% shares | Q2 2026 |
| Velan Capital Investment Management LPHedge fund | 0.9% | $1.5M | 105,000 | +2.9% shares | Q2 2026 |
| MIC Capital Management UK LLPHedge fund | 0.3% | $1.2M | 87,028 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 12). Screen LYEL in the grand portfolio →
LYEL stock trades by members of Congress
No member of Congress has disclosed a trade in LYEL.
LYEL questions and answers
Are insiders buying LYEL stock?
Between Aug 1, 2026 and Oct 29, 2026, 6 LYEL insiders filed 9 sales worth $215K on SEC Form 4, and no open-market purchases.
Which hedge funds own LYEL?
12 13F filers hold LYEL among their 50 largest positions, worth $120.5M combined. The biggest bets by portfolio weight are Orland Properties Ltd (5.2%), ARCH Venture Management, LLC (4.1%) and GSK plc (3.5%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded LYEL?
No member of Congress has disclosed a trade in LYEL.
Who is the largest holder of LYEL?
Among 13F filers, ARCH Venture Management, LLC reports the largest LYEL position, $45.5M (3,247,162 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Orland Properties Ltd's: 5.2% of its portfolio.
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