aTYR PHARMA INC (ATYR) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: May 15, 2026

Risk Assessment Details

Potential Dilution: 121.84% of current shares
Recent Dilution: 39.55% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
98M
Potential Supply
120M
Additional shares possible
Splits
None
Past 2 years

Summary

ATYR currently has 98M outstanding shares. with significant dilution risk as 119M authorized shares could dilute existing holders by 121.8%. The company has significantly diluted shareholders by 39.55% over the past 2 years, indicating aggressive capital raising.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 15, 2026

10-Q filing | 98.0M shares outstanding

98M 120M
Nov 06, 2025

10-Q filing | 97.2M shares outstanding

97M 120M
Aug 07, 2025

S-3 filing: The filing is an S-3 form indicating that the company may offer and sell up to $300,000,000 of any combination of common stock, preferred stock, and debt securities.

86M 120M
Aug 07, 2025

10-Q filing | 90.1M shares outstanding

90M 63M
May 07, 2025

10-Q filing | 86.5M shares outstanding

86M 63M
Mar 13, 2025

10-K filing | 88.9M shares outstanding

89M 63M
Nov 07, 2024

10-Q filing | 75.8M shares outstanding

76M 63M
Aug 13, 2024

10-Q filing | 72.3M shares outstanding

72M 63M
May 02, 2024

10-Q filing | 66.1M shares outstanding

66M 63M
Mar 14, 2024

10-K filing | 67.8M shares outstanding

68M 63M
Nov 09, 2023

S-3 filing: The filing is an S-3 shelf registration to register common stock, preferred stock and debt securities for future sale up to a total of $300,000,000.

55M 63M
Nov 09, 2023

10-Q filing | 57.9M shares outstanding

58M 63M
Aug 09, 2023

10-Q filing | 55.1M shares outstanding

55M 63M
May 09, 2023

10-Q filing | 54.3M shares outstanding

54M 63M
Mar 14, 2023

10-K filing | 53.2M shares outstanding

53M 63M
Feb 09, 2023

8-K filing: aTyr Pharma, Inc. entered into an underwriting agreement to issue and sell 22,225,000 shares of common stock in an underwritten public offering at a price of $2.25 per share, with an option for the underwriters to purchase an additional 3,333,750 shares, with the offering scheduled to close on February 13, 2023, and estimated gross proceeds of approximately $50.0 million. ($50.0M proceeds)

29M 63M
Nov 14, 2022

10-Q filing | 28.7M shares outstanding

29M 63M
Aug 15, 2022

10-Q filing | 28.1M shares outstanding

28M 63M
May 10, 2022

10-Q filing | 28.1M shares outstanding

28M 63M
Mar 15, 2022

10-K filing | 27.8M shares outstanding

28M 63M
Mar 15, 2022

S-3 filing: The company files an S-3 to register an offering for common stock, preferred stock, and debt securities, with a total offering amount of $200,000,000.

28M 63M
Nov 12, 2021

10-Q filing | 27.8M shares outstanding

28M 21M
Sep 16, 2021

8-K filing: aTyr Pharma, Inc. entered into a purchase agreement with Piper Sandler & Co. and RBC Capital Markets, LLC, to issue and sell 9,375,000 shares of common stock in an underwritten public offering at $8.00 per share, with an option for the Underwriters to purchase an additional 1,406,250 shares. ($75.0M proceeds)

16M 21M
Aug 11, 2021

10-Q filing | 16.9M shares outstanding

17M 21M
Aug 11, 2021

S-3 filing: The company is filing an S-3 to register common stock, preferred stock, and debt securities for a total offering amount of $75,000,000, which may be offered from time to time.

16M 21M
May 14, 2021

10-Q filing | 16.1M shares outstanding

16M 5.5M
Mar 24, 2021

10-K filing | 16.0M shares outstanding

16M 5.5M
Nov 16, 2020

S-3 filing: The company intends to offer up to $75,000,000 of any combination of common stock, preferred stock, and/or debt securities.

10M 5.5M
Nov 13, 2020

10-Q filing | 10.1M shares outstanding

10M 5.5M
Sep 18, 2020

S-1 filing: The filing is an S-1 form relating to the sale of up to 3,000,000 shares of common stock by Aspire Capital Fund, LLC, with the company potentially receiving up to $20.0 million from the sale of common stock to the selling stockholder.

9.5M 5.5M
Sep 14, 2020

8-K filing: aTyr Pharma, Inc. entered into a common stock purchase agreement with Aspire Capital Fund, LLC, providing that Aspire Capital is committed to purchase up to an aggregate of $20.0 million of shares of the Company's common stock at the Company's request from time to time during the 30 month term of the Purchase Agreement. ($20.0M proceeds)

9.5M 2.5M
Aug 13, 2020

10-Q filing | 9.5M shares outstanding

9.5M 2.5M
May 12, 2020

10-Q filing | 9.4M shares outstanding

9.4M 2.5M
Mar 26, 2020

10-K filing | 9.4M shares outstanding

9.4M 2.5M
Jan 27, 2020

S-1/A filing: The company is offering 2,542,372 shares of common stock, with an over-allotment option of 381,355 shares. The last reported sale price was $5.90 per share. Net proceeds are estimated to be $13.5 million.

3.9M 2.5M
Jan 17, 2020

S-1 filing: This is an S-1 filing for an offering of common stock. The last reported sale price of the common stock on January 16, 2020, was $7.06 per share. The underwriters have an option to purchase additional shares to cover over-allotments.

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