diff --git a/content/concepts/ocean-tokens.md b/content/concepts/ocean-tokens.md
index 3f71ad0c..1152bfa5 100644
--- a/content/concepts/ocean-tokens.md
+++ b/content/concepts/ocean-tokens.md
@@ -21,7 +21,7 @@ There are Ocean Tokens in several testnets, including the Kovan testnet and Nile
 
 **NOTICE: Below we outline the plans for Mainnet Ocean Tokens at the time of writing. Those plans might change. We will update this page on a regular basis.**
 
-The initial circulating supply of Mainnet Ocean Tokens will first become available on the Ethereum Mainnet (_not_ the Ocean Mainnet).
+The initial circulating supply of Mainnet Ocean Tokens became available on the Ethereum Mainnet (_not_ the Ocean Mainnet) in May 2019.
 
 If you acquired Ocean Tokens in the initial circulating supply, they will be sent to the address you provided.
 
diff --git a/content/tutorials/get-ether-and-ocean-tokens.md b/content/tutorials/get-ether-and-ocean-tokens.md
index dff7419d..21b1fc19 100644
--- a/content/tutorials/get-ether-and-ocean-tokens.md
+++ b/content/tutorials/get-ether-and-ocean-tokens.md
@@ -79,14 +79,21 @@ See the page about [Ocean Tokens](/concepts/ocean-tokens/).
 
 ### Get Mainnet Ocean Tokens
 
-There are several ways to acquire some of the Ocean Tokens in the initial circulating supply, including:
+There were several ways to acquire some of the Mainnet Ocean Tokens in the initial circulating supply, including:
 
 - participation in the seed round
 - participation in the pre-sale
 - participation in the token sale
+- participation in the initial exchange offering
 - completion of a [bounty](/concepts/bounties/)
 
-In the future, it will become possible to earn Mainnet Ocean Tokens as network rewards. The [Ocean Protocol Technical Whitepaper](https://oceanprotocol.com/tech-whitepaper.pdf) explains that in more detail.
+After [the initial exchange offering on Bittrex International](https://blog.oceanprotocol.com/initial-exchange-offering-of-ocean-protocol-on-bittrex-international-a454688f466a), Mainnet Ocean Tokens became available in the Ethereum Mainnet (_not_ the Ocean Mainnet; there was no Ocean Mainnet at the time).
+
+As of 7 May 2019, there was one exchange in the official list of exchanges listing Mainnet Ocean Tokens (in the Ethereum Mainnet): **Bittrex International**.
+
+In the future, the Ocean Mainnet will be launched and later it will become possible to move Ocean Tokens from the Ethereum Mainnet to the Ocean Mainnet.
+
+In the future, it will become possible to earn Mainnet Ocean Tokens as network rewards and in other ways. The [Ocean Protocol Technical Whitepaper](https://oceanprotocol.com/tech-whitepaper.pdf) gives more details.
 
 ### Get Testnet Ocean Tokens
 
diff --git a/content/tutorials/wallets-and-ocean-tokens.md b/content/tutorials/wallets-and-ocean-tokens.md
index cb8ce58a..4847d555 100644
--- a/content/tutorials/wallets-and-ocean-tokens.md
+++ b/content/tutorials/wallets-and-ocean-tokens.md
@@ -35,6 +35,12 @@ If you're using [Barge](https://github.com/oceanprotocol/barge) to run a local S
 - `$HOME/.ocean/keeper-contracts/artifacts/OceanToken.spree.json` for Spree
 - `$HOME/.ocean/keeper-contracts/artifacts/OceanToken.development.json` for Ganache
 
+### Ethereum Mainnet
+
+The Ocean Token contract address in the Ethereum Mainnet is:
+
+`0x985dd3D42De1e256d09e1c10F112bCCB8015AD41`
+
 ## Step 2: Teach Your Wallet Software about Ocean Tokens
 
 ### MetaMask Instructions