Transaction · 0002150331-26-000003

Aguirre Jarrad Mattieu

Aguirre Jarrad Mattieu, CMO, reported an open-market or private sale at Lyell Immunopharma, Inc. involving 422.000000 shares for an estimated $3641.86. Reported holdings after the transaction were 19857.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SCMO
LYELLyell Immunopharma, Inc.
Trade date
Oct 12, 2026
Filing date
Oct 13, 2026
View on SEC Insider profile
Estimated value-$3.64kShares × reported price
Shares traded422$8.63 per share
Holdings after19.8kDirect
% of reported position traded2.08%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 20,279 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

LYEL price since this filing

Daily closing prices, with the filing date and available return windows
LYEL · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago +37.3%1w ago +4.1%1d ago +0.0%
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0002150331-26-000003
Common Stock
Transaction date
Oct 12, 2026
Filed Oct 13, 2026, 09:17 PM · 1d delay
Shares
422 sh
$8.63 per share
Estimated value
-$3.64k
Computed from shares × price
Holdings after
19,857 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership
Filing-only score

+10 points

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Medical Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    Shares automatically sold to cover tax withholding obligation from settlement of vested restricted stock units.

  2. F2

    The price reported above reflects the weighted average price of the shares sold. The sale price ranged from $8.54 to $8.63 per share. Upon request from the SEC staff, the Issuer, or a security holder…

  3. regarding the number of shares sold at each separate price within the range set forth in this Form 4.

Original filing · 0002150331-26-000003
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