Skip to main content
Signal8

Lyell Immunopharma, Inc. (LYEL)

Lyell Immunopharma, Inc. (LYEL) Insider Trading

Directors, officers and holders of more than 10% of LYEL report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 103 transactions on file: 2 with code P, 26 with code S and 22 with other codes.

DateInsiderCodeShares
Oct 12, 2026Aguirre Jarrad MattieuS Sale422
Sep 10, 2026Shook DavidS Sale500
Sep 10, 2026Aguirre Jarrad MattieuA Award47,500
Aug 21, 2026Hill Stephen J.S Sale989
Aug 21, 2026Seely LynnS Sale9,589
Aug 21, 2026Lee Gary K.S Sale1,457
Aug 10, 2026Seely LynnS Sale390
Aug 10, 2026Lee Gary K.S Sale131
Aug 10, 2026Hill Stephen J.S Sale89
Aug 10, 2026Bulis Veronica SanchezS Sale621
Jul 27, 2026Innovative Cellular Therapeutics Holdings LtdJ Other38,500
Jul 27, 2026Innovative Cellular Therapeutics Holdings LtdJ Other44,000
Jul 17, 2026Innovative Cellular Therapeutics Holdings LtdS Sale10
Jul 16, 2026Innovative Cellular Therapeutics Holdings LtdS Sale10
Jun 29, 2026Innovative Cellular Therapeutics Holdings LtdJ Other76,000
Jun 15, 2026Innovative Cellular Therapeutics Holdings LtdJ Other66,500
Jun 10, 2026NABEL ELIZABETH GA Award9,250
Jun 10, 2026Shook DavidS Sale1,977
Jun 10, 2026Bachleda MarkA Award9,250
Jun 10, 2026Klausner RichardA Award9,250
Jun 10, 2026Ramachandra SumantA Award9,250
Jun 10, 2026RIEFLIN WILLIAM JLA Award9,250
Jun 10, 2026FRIEDMAN CATHYA Award9,250
Jun 10, 2026BRAWLEY OTIS WA Award9,250
May 11, 2026Lee Gary K.S Sale130
May 11, 2026Seely LynnS Sale388
May 11, 2026Hill Stephen J.S Sale89
May 11, 2026Bulis Veronica SanchezS Sale217
Mar 9, 2026Shah SmitalA Award140,000
Mar 6, 2026ARCH Venture Fund XIII, L.P.P Purchase488,090
Mar 6, 2026ARCH Venture Partners IX, LLCP Purchase488,090
Feb 11, 2026Seely LynnS Sale7,455
Feb 11, 2026Lee Gary K.S Sale1,671
Feb 11, 2026Hill Stephen J.S Sale1,236
Feb 10, 2026Seely LynnA Award155,000
Feb 10, 2026Lee Gary K.A Award50,000
Feb 10, 2026Bulis Veronica SanchezA Award8,750
Feb 10, 2026Hill Stephen J.S Sale109
Feb 10, 2026Shook DavidA Award50,000
Feb 10, 2026Seely LynnS Sale438
Feb 10, 2026Hill Stephen J.A Award65,000
Feb 10, 2026Lee Gary K.S Sale147
Feb 10, 2026Bulis Veronica SanchezS Sale254
Feb 10, 2026Meltz Mark AA Award50,000
Feb 9, 2026Hill Stephen J.A Award4,000
Feb 9, 2026Seely LynnA Award20,000
Feb 9, 2026Lee Gary K.A Award4,000
Dec 30, 2025Bulis Veronica SanchezS Sale936
Dec 24, 2025Bulis Veronica SanchezS Sale1,136
Nov 10, 2025Hill Stephen J.S Sale95

The full Form 4 history is on the LYEL company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.