Lyell Immunopharma, Inc. (LYEL) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: April 03, 2026

Risk Assessment Details

Potential Dilution: 196.21% of current shares
Recent Dilution: 1461.46% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
23M
Potential Supply
46M
Additional shares possible
Splits
None
Past 2 years

Summary

LYEL currently has 23.3M outstanding shares. with significant dilution risk as 45.7M authorized shares could dilute existing holders by 196.2%. The company has significantly diluted shareholders by 1461.46% over the past 2 years, indicating aggressive capital raising.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
Apr 03, 2026

S-3 filing: This is an offering for resale by selling stockholders of up to 1,952,360 shares of common stock that were previously sold in a private placement.

23M 46M
Mar 12, 2026

10-K filing | 23.3M shares outstanding

23M 44M
Dec 05, 2025

S-3 filing: This prospectus relates to the proposed resale from time to time by Innovative Cellular Therapeutics Holdings Limited of up to 1,900,000 shares of our common stock.

21M 44M
Nov 12, 2025

10-Q filing | 21.2M shares outstanding

21M 42M
Aug 12, 2025

S-3 filing: This is an S-3 filing for the offer and resale by selling stockholders of up to 3,753,752 shares of common stock, which were previously sold to them in a private placement.

300M 42M
Aug 12, 2025

10-Q filing | 19.2M shares outstanding

19M 38M
Jul 18, 2025

S-3 filing: This is an S-3 filing for the resale of up to 625,000 shares of common stock by selling stockholders, which were issued as part of the merger consideration. The company will not receive any proceeds from the sale.

300M 38M
May 13, 2025

10-Q filing | 295.1M shares outstanding

300M 37M
Mar 11, 2025

10-K filing | 295.2M shares outstanding

300M 37M
Nov 29, 2024

S-3 filing: This prospectus relates to the proposed resale from time to time by the selling stockholders of up to 37,499,981 shares of common stock, issued as part of the merger consideration.

260M 37M
Nov 07, 2024

10-Q filing | 256.3M shares outstanding

260M 0
Aug 07, 2024

10-Q filing | 255.4M shares outstanding

260M 0
May 06, 2024

10-Q filing | 254.3M shares outstanding

250M 0
Feb 29, 2024

S-3 filing: Lyell Immunopharma, Inc. may offer and sell up to an aggregate amount of $400,000,000 of any combination of common stock, preferred stock, and debt securities.

250M 0
Feb 28, 2024

10-K filing | 251.0M shares outstanding

250M 0
Nov 07, 2023

10-Q filing | 251.3M shares outstanding

250M 0
Aug 08, 2023

10-Q filing | 250.2M shares outstanding

250M 0
May 04, 2023

10-Q filing | 249.6M shares outstanding

250M 0
Feb 28, 2023

10-K filing | 247.1M shares outstanding

250M 0
Nov 08, 2022

10-Q filing | 248.3M shares outstanding

250M 0
Aug 04, 2022

10-Q filing | 246.3M shares outstanding

250M 0
May 10, 2022

10-Q filing | 244.2M shares outstanding

240M 0
Mar 29, 2022

10-K filing | 245.4M shares outstanding

250M 0
Nov 12, 2021

10-Q filing | 240.5M shares outstanding

240M 0
Aug 12, 2021

10-Q filing | 239.4M shares outstanding

240M 0
May 25, 2021

S-1 filing: S-1 filing for an initial public offering of common stock; the company notes potential dilution and insider influence after the offering.

N/A 0
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