NASDAQ:LYEL

Lyell Immunopharma Stock Insider Trading

Healthcare > Biotechnology

Buy LYEL

*Your capital is at risk

$12.57

-2.32 (-15.58%)

At Close: Jun 03, 2026

Lyell Immunopharma Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 93.60. In total, the insiders bought 4.74M and sold 39.63K LYEL shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	93.60
● Buy	4.74M shares
● Sell	39.63K shares
63% Buy Activity Moderate Negative Correlation
Buy Signal Medium Confidence Mar 06, 2026 Analysis Breakdown: Strongly supported by a very high Insider Power Score of 93.6. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Aug 12, 2025 Sell	Common Stock S-Sale	Lee Gary K. Chief Scientific Officer	Officer	136 Value: $1K
Aug 12, 2025 Sell	Common Stock S-Sale	Newton Charles W. Chief Financial Officer	C-Suite Officer	136 Value: $1K
Aug 12, 2025 Sell	Common Stock S-Sale	Newton Charles W. Chief Financial Officer	C-Suite Officer	136 Value: $1K
Aug 12, 2025 Sell	Common Stock S-Sale	Lee Gary K. Chief Scientific Officer	Officer	136 Value: $1K
Aug 12, 2025 Sell	Common Stock S-Sale	Hill Stephen J. Chief Operating Officer	C-Suite Officer	94 Value: $972
Aug 12, 2025 Sell	Common Stock S-Sale	Seely Lynn President And CEO	CEO / President	406 Value: $4K
Aug 11, 2025 Sell	Common Stock S-Sale	Seely Lynn President And CEO	CEO / President	391 Value: $4K
Aug 11, 2025 Sell	Common Stock S-Sale	Hill Stephen J. Chief Operating Officer	C-Suite Officer	91 Value: $958
Aug 11, 2025 Sell	Common Stock S-Sale	Lee Gary K. Chief Scientific Officer	Officer	131 Value: $1K
Aug 11, 2025 Sell	Common Stock S-Sale	Newton Charles W. Chief Financial Officer	C-Suite Officer	131 Value: $1K
Aug 11, 2025 Sell	Common Stock S-Sale	Newton Charles W. Chief Financial Officer	C-Suite Officer	131 Value: $1K
Aug 11, 2025 Sell	Common Stock S-Sale	Lee Gary K. Chief Scientific Officer	Officer	131 Value: $1K
Aug 11, 2025 Sell	Common Stock S-Sale	Hill Stephen J. Chief Operating Officer	C-Suite Officer	91 Value: $958
Aug 11, 2025 Sell	Common Stock S-Sale	Seely Lynn President And CEO	CEO / President	391 Value: $4K
Jul 25, 2025 Buy	Common Stock J-Other	Arch Venture Partners Ix, Llc	10% Owner	0 Value: $0
Jul 25, 2025 Buy	Common Stock	Arch Venture Fund Xiii, L.p. 10 Percent Owner	10% Owner	0 Value: $0
Jul 25, 2025 Buy	Common Stock	Arch Venture Fund Xiii, L.p. 10 Percent Owner	10% Owner	0 Value: $0
Jul 25, 2025 Buy	Common Stock J-Other	Arch Venture Partners Ix, Llc	10% Owner	0 Value: $0
Jun 09, 2025 Buy	Option (right to buy) A-Award	Bachleda Mark Director	Director	13 000 Value: $162.1K
Jun 09, 2025 Buy	Option (right to buy) A-Award	Meltz Mark A General Counsel	Officer	100 000 Value: $1.25M
Jun 09, 2025 Buy	Option (right to buy) A-Award	Shook David Chief Medical Officer	Officer	43 750 Value: $545.6K
Jun 09, 2025 Buy	Common Stock A-Award	Shook David Chief Medical Officer	Officer	21 900 Value: $273.1K
Jun 09, 2025 Buy	Common Stock J-Other	Bachleda Mark Insider	Other	0 Value: $0
Jun 09, 2025 Buy	Common Stock J-Other	Meltz Mark A Insider	Other	0 Value: $0
Jun 09, 2025 Buy	Common Stock J-Other	Shook David Insider	Other	0 Value: $0

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT LYELL IMMUNOPHARMA, INC.

Lyell Immunopharma, Inc., a T cell reprogramming company, engages in developing T cell therapies for patients with solid tumors. The company develops therapies using technology platforms, such as Gen-R, an ex vivo genetic reprogramming technology to overcome T cell exhaustion; and Epi-R, an ex vivo epigenetic reprogramming technology to generate population of T cells with durable stemness. Its pipeline includes LYL797, a T cell product candidate ...

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