SUTRO BIOPHARMA, INC. (STRO) - Dilution Analysis
Visualizing historical and potential share dilution over time
Dilution Analysis
Risk Assessment Details
Summary
STRO currently has 16.6M outstanding shares. with moderate dilution risk from 7.23M authorized shares representing 43.6% potential dilution. The company has significantly diluted shareholders by 105.09% over the past 2 years, indicating aggressive capital raising. Recent corporate actions include 1 stock split (positive for accessibility) and 1 reverse split (concerning signal).
Share Structure Timeline
Historical Data Points
| Date | Event | Outstanding | Supply |
|---|---|---|---|
| May 14, 2026 |
10-Q filing | 16.6M shares outstanding |
17M | 7.2M |
| Mar 23, 2026 |
S-3 filing: Sutro Biopharma, Inc. is filing an S-3 to offer common stock, preferred stock, debt securities, warrants, subscription rights, and units up to an aggregate amount of $300 million. |
8.6M | 15M |
| Dec 03, 2025 |
Stock Split
8-K filing: Stock split 1-for-10 | Outstanding: 84,869,864 → 8,519,392 |
8.5M | 11M |
| Nov 06, 2025 |
10-Q filing | 84.9M shares outstanding |
85M | 110M |
| Aug 07, 2025 |
10-Q filing | 84.6M shares outstanding |
85M | 110M |
| May 08, 2025 |
10-Q filing | 83.1M shares outstanding |
83M | 110M |
| Mar 13, 2025 |
10-K filing | 76.8M shares outstanding |
77M | 110M |
| Nov 13, 2024 |
10-Q filing | 82.0M shares outstanding |
82M | 110M |
| Aug 13, 2024 |
10-Q filing | 81.2M shares outstanding |
81M | 110M |
| May 13, 2024 |
10-Q filing | 81.8M shares outstanding |
82M | 110M |
| Apr 02, 2024 |
8-K filing: Sutro Biopharma, Inc. entered into an underwriting agreement to issue and sell 14,478,764 shares of its common stock at $5.18 per share, with gross proceeds estimated at $75.0 million, intending to use the net proceeds for general corporate purposes. ($75.0M proceeds) |
60M | 130M |
| Apr 02, 2024 |
8-K filing: Sutro Biopharma, Inc. entered into an agreement with Ipsen Biopharmaceuticals, Inc. for the purchase of 4,827,373 shares of Sutro's common stock at a price representing a 17% premium to the VWAP for $25 million. ($25.0M proceeds) |
60M | 130M |
| Mar 25, 2024 |
10-K filing | 60.2M shares outstanding |
60M | 130M |
| Nov 13, 2023 |
S-3 filing: Sutro Biopharma, Inc. may offer up to $300.0 million aggregate dollar amount of shares of its common stock or preferred stock, debt securities, warrants to purchase its common stock, preferred stock or debt securities, subscription rights to purchase its common stock, preferred stock or debt securities and/or units consisting of some or all of these securities. |
60M | 130M |
| Nov 13, 2023 |
10-Q filing | 60.6M shares outstanding |
61M | 130M |
| Aug 10, 2023 |
10-Q filing | 60.3M shares outstanding |
60M | 0 |
| May 15, 2023 |
10-Q filing | 58.7M shares outstanding |
59M | 0 |
| Mar 30, 2023 |
10-K filing | 60.2M shares outstanding |
60M | 0 |
| Nov 08, 2022 |
10-Q filing | 52.3M shares outstanding |
52M | 0 |
| Aug 08, 2022 |
10-Q filing | 47.0M shares outstanding |
47M | 0 |
| May 09, 2022 |
10-Q filing | 46.9M shares outstanding |
47M | 0 |
| Mar 01, 2022 |
POS AM filing: Sutro Biopharma, Inc. may offer up to $350,000,000 aggregate dollar amount of shares of their common stock or preferred stock, debt securities, warrants to purchase their common stock, preferred stock or debt securities, subscription rights to purchase their common stock, preferred stock or debt securities and/or units consisting of some or all of these securities. Common stock offered by them having an aggregate offering price of up to $100 million through an at the market offering. |
46M | 54K |
| Feb 28, 2022 |
10-K filing | 46.4M shares outstanding |
46M | 0 |
| Nov 10, 2021 |
10-Q filing | 46.2M shares outstanding |
46M | 0 |
| Aug 09, 2021 |
10-Q filing | 46.1M shares outstanding |
46M | 0 |
| May 07, 2021 |
10-Q filing | 46.1M shares outstanding |
46M | 0 |
| Mar 18, 2021 |
10-K filing | 45.9M shares outstanding |
46M | 0 |
| Dec 09, 2020 |
8-K filing: Sutro Biopharma, Inc. entered into an underwriting agreement to issue and sell 6,000,000 shares of its common stock at a public offering price of $21.00 per share, with an option for the underwriters to purchase up to an additional 900,000 shares, with estimated net proceeds of approximately $118.0 million. ($126.0M proceeds) |
38M | 0 |
| Nov 05, 2020 |
10-Q filing | 37.9M shares outstanding |
38M | 0 |
| Aug 06, 2020 |
10-Q filing | 35.9M shares outstanding |
36M | 0 |
| May 12, 2020 |
8-K filing: Sutro Biopharma, Inc. entered into an underwriting agreement to issue and sell 11,000,000 shares of its common stock at a price of $7.75 per share, with an option for the underwriters to purchase an additional 1,650,000 shares. ($85.25M proceeds) |
23M | 0 |
| May 11, 2020 |
10-Q filing | 23.2M shares outstanding |
23M | 0 |
| Mar 16, 2020 |
10-K filing | 23.1M shares outstanding |
23M | 0 |
| Mar 03, 2020 |
8-K filing: Sutro Biopharma, Inc. issued warrants to lenders, Oxford Finance LLC and Silicon Valley Bank, exercisable for 81,257 shares of the company's common stock at an exercise price of $9.23 per share, in connection with a loan and security agreement. |
N/A | 0 |