Mereo BioPharma Group plc (MREO) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

Medium Risk
Moderate dilution risk
Last updated: May 12, 2026

Risk Assessment Details

Potential Dilution: 12.77% of current shares
Recent Dilution: 24.96% (2 years)
Historical Dilution Factor: moderate recent dilution
Outstanding Shares
800M
Potential Supply
100M
Additional shares possible
Splits
None
Past 2 years

Summary

MREO currently has 802M outstanding shares. with limited dilution risk as only 102M additional shares (12.8%) are authorized for issuance. The company has diluted shareholders by 24.96% over the past 2 years through share issuances.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 12, 2026

10-Q filing | 801.8M shares outstanding

800M 100M
Mar 19, 2026

10-K filing | 797.1M shares outstanding

800M 100M
Aug 12, 2025

10-Q filing | 799.4M shares outstanding

800M 100M
May 13, 2025

10-Q filing | 784.3M shares outstanding

780M 100M
Mar 26, 2025

10-K filing | 739.6M shares outstanding

740M 100M
Nov 25, 2024

S-3 filing: Mereo BioPharma Group plc is offering 26,638,972 ordinary shares in the form of American Depositary Shares by selling shareholders.

770M 100M
Nov 12, 2024

8-K filing: Mereo BioPharma Group plc entered into an amendment agreement with AstraZeneca, agreeing to issue 2,044,392 ordinary shares and pay $0.5 million to AstraZeneca in connection with an agreed milestone.

710M 76M
Nov 12, 2024

10-Q filing | 770.1M shares outstanding

770M 76M
Aug 13, 2024

10-Q filing | 711.8M shares outstanding

710M 76M
May 15, 2024

S-3 filing: Mereo BioPharma Group plc proposes to offer and sell American Depositary Shares for an aggregate offering price of up to $175,000,000 in one or more offerings, including an at-the-market offering of up to $50,000,000 through Jefferies.

660M 76M
May 15, 2024

10-Q filing | 700.3M shares outstanding

700M 76M
Mar 27, 2024

10-K filing | 659.5M shares outstanding

660M 0
Mar 28, 2023

20-F filing | 624.9M shares outstanding

620M 0
Mar 31, 2022

20-F filing | 584.9M shares outstanding

580M 0
Aug 05, 2021

F-3 filing: This is an at-the-market offering of ADSs having an aggregate offering price of up to $50,000,000 through Jefferies LLC. The company intends to use the net proceeds from this offering for general corporate purposes.

340M 0
Mar 31, 2021

20-F filing | 339.0M shares outstanding

340M 0
Oct 06, 2020

F-3 filing: This F-3 filing is a supplement to the base prospectus for an at-the-market offering of American Depositary Shares (ADSs) with an aggregate offering price of up to $50,000,000 through sales agent SVB Leerink LLC, intended for general corporate purposes.

340M 0
Jul 06, 2020

F-3 filing: This is an F-3 filing for Mereo BioPharma Group plc related to the offering of ordinary shares underlying the ADSs. Expenses related to the offering are estimated to be $195,146.69.

340M 0
Jul 02, 2020

POS AM filing: This POS AM filing registers ADSs offered by the selling shareholder, including shares issuable to Aspire Capital under a Purchase Agreement.

340M 0
Jun 15, 2020

20-F filing | 98.0M shares outstanding

98M 0
Feb 18, 2020

F-1 filing: This is an F-1 filing related to an offering of securities, with details provided on estimated expenses and legal matters.

N/A 0
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