Vesta: Can this mineral help boost the carbon stored in oceans? - Trellis, Aug 2021

Ebb Carbon*:  Up to 350,000 tons sold in advance market commitment.
Ebb Carbon and Microsoft: A Landmark Carbon Dioxide Removal Agreement

Ebb’s 2021 credit sale**:  Amount purchased was not initially disclosed, but a 2022 report in Trellis (formerly GreenBiz) described the agreement as an advance purchase of 256 tons:
Stripe Climate increases carbon removal commitments to $15 million, adding four new companies - Stripe, Dec 2021
A dream team for ocean carbon capture? - Trellis, May 2023

Captura:
Captura announces sale of carbon removal credits and strategic partnership with Mitsui O.S.K. Lines - Captura, Mar 2025

Planetary: 
Frontier Commits $31M to Planetary to Scale Ocean Carbon Removal - Planetary Tech, Aug 2025
Planetary Signs $31 Million Ocean Carbon Removal Deal with Buyers Including Google, Stripe, H&M - ESG Today, Aug 2025
The World’s First Verified OAE Credits - Planetary Tech, June 2025

Gigablue:
Gigablue Announces Largest Ocean Carbon Removal Agreement with SkiesFifty, Capturing 200,000 Tons Over Four Years - Gigablue, Jan 2025

CREW Carbon: 
CREW Carbon Signs $32M Offtake Agreement with Frontier - Yale Ventures, Dec 2024

Running Tide:
Running Tide becomes Microsoft’s first open ocean-based carbon removal supplier - PR Newswire, Mar 2023
Running Tide, which sold carbon credits for sinking seaweed, shuttering operations - Seafood Source, June 2025