Lyell Immunopharma Ownership & Insider Activity

Lyell Immunopharma (LYEL) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 21.1% of shares outstanding. Institutional investors hold 9.7%. Over the past 90 days, insiders made 7 sales worth $43K.

Shares Outstanding

24.505M

Shares Float

20.986M

Insider Shares Owned

5.164M

Insider % Owned

21.1%

Institutional Shares Held

2.374M

Institutional % Held

9.7%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$43K total

Net Activity

Net Selling

Net Value (90d)

-$43K

Lyell Immunopharma Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 10, 2026	Sanchez Veronica Bulis	VP, CORPORATE CONTROLLER	SELL	621.000	$14.34	$9K
Aug 10, 2026	Gary Lee	CHIEF SCIENTIFIC OFFICER	SELL	131.000	$14.34	$2K
Aug 10, 2026	Stephen Hill	CHIEF OPERATING OFFICER	SELL	89.000	$14.34	$1K
Aug 10, 2026	Lynn Seely	PRESIDENT AND CEO	SELL	390.000	$14.34	$6K
Jul 17, 2026	Innovative Cellular Therapeutics Holdings Ltd	—	SELL	10.000	$13.70	$137
Jul 16, 2026	Innovative Cellular Therapeutics Holdings Ltd	—	SELL	10.000	$13.73	$137
Jun 10, 2026	David Shook	CHIEF MEDICAL OFFICER	SELL	1.977K	$12.64	$25K
May 11, 2026	Lynn Seely	PRESIDENT AND CEO	SELL	388.000	$18.91	$7K
May 11, 2026	Gary Lee	CHIEF SCIENTIFIC OFFICER	SELL	130.000	$18.92	$2K
May 11, 2026	Stephen Hill	CHIEF OPERATING OFFICER	SELL	89.000	$18.92	$2K
May 11, 2026	Sanchez Veronica Bulis	VP, CORPORATE CONTROLLER	SELL	217.000	$18.91	$4K
Mar 6, 2026	ARCH Venture Partners IX LLC, ARCH Venture Partners IX LP, ARCH Venture Partners IX Overage LP, ARCH Venture Fund IX LP, ARCH Venture Fund IX Overage LP	10% OWNER	BUY	488.090K	$25.61	$12.5M
Mar 6, 2026	ARCH Venture Fund XIII LP, ARCH Venture Partners XIII LP, ARCH Venture Partners XIII LLC, KEITH CRANDELL, ROBERT NELSEN, Kristina Burow, STEVEN GILLIS, PAUL BERNS, CLINTON BYBEE	10% OWNER	BUY	488.090K	$25.61	$12.5M