Sky Put USDS on Seven Chains. 98% of It Never Left Ethereum.

Sky's USDS is the third-largest stablecoin in the world, behind only Tether and Circle. It holds $6.65 billion. Over two years it has been deployed to seven separate blockchains with bridges, incentive budgets and launch announcements attached.

On August 14, 2026, $6.54 billion of that supply sits on Ethereum. That is 98.3 percent. The other 1.7 percent is the interesting part, because most of it was never user money in the first place.

The Seven-Chain Map, in Dollars

DefiLlama tracks USDS balances on Ethereum, Arbitrum, Solana, Base, OP Mainnet, Unichain and Avalanche. Today's snapshot reads like this:

• Ethereum — $6.538 billion
• Arbitrum — $99.77 million
• Solana — $9.45 million
• Base — $2.21 million
• OP Mainnet — under $10,000
• Unichain — under $10,000
• Avalanche — under $10,000

For scale, the same tracker follows USDT across 130 chains and USDC across 154. USDS, launched in September 2024 by Sky — the protocol that spent a decade as MakerDAO — reaches seven, and three of those seven have effectively nothing on them.

Round Numbers Are the Tell

Arbitrum is the clearest case. USDS arrived there on February 26, 2025 at a balance of $100,000,001. Eighteen months later the balance is $99,766,514. Across 535 days of daily snapshots the number takes nine distinct values. Total drift: 0.23 percent.

A stablecoin that people are actually using does not behave that way. Lending demand and DEX arbitrage move a chain's balance in ragged amounts every day. What Arbitrum has is a deposit that Sky made once and then left alone.

That deposit comes from the Spark Liquidity Layer, Sky's automated allocator. Spark's own documentation calls the SLL "a non-custodial capital allocator for Spark across DeFi/CeFi and TradFi opportunities." Sky Governance approves every destination chain and its rate limits. Token holders on the receiving chain do not.

What Happened on July 7

On July 6, 2026, the three largest non-Ethereum balances were Base at $148.3 million, OP Mainnet at $100.3 million and Unichain at $100.0 million. The next day Base read $1.7 million and the other two read zero.

Roughly $347 million left three chains inside 24 hours. It did not resurface on Ethereum — the Ethereum balance fell that day too, from $7.535 billion to $7.460 billion. Total USDS supply dropped from $8.00 billion to $7.58 billion. The tokens were redeemed, not relocated.

A week later Ethereum shed another $888 million in one day, from $7.47 billion on July 13 to $6.58 billion on July 14. Two contractions three weeks apart took USDS from $8.2 billion to $6.6 billion.

Sky has not presented any of this as a retreat. Nine days after the L2 balances hit zero, a Spark governance post dated July 16 proposed activating the full Spark Liquidity Layer and Spark Savings on Robinhood Chain, plus a new savings vault on X Layer. The same post says of that deployment that "the majority of USDT0 deposited into spUSDT is expected to be bridged back to Ethereum, so the direct value at risk should be fairly low."

That sentence is the honest version of the whole strategy, and I think it deserves more attention than the launch headlines that surround it. Capital goes out to a chain to earn, and then it comes back. Sky is not migrating USDS anywhere. It is renting shelf space and expects the inventory home by evening.

Solana Got Real Money and Shrank Anyway

Solana is the one deployment where Sky paid retail-scale incentives rather than parking treasury capital. At the November 2024 launch, Kamino Finance users were offered 200,000 USDS a week for USDC/USDS liquidity plus another 100,000 a week for stablecoin suppliers. Drift Protocol users got 100,000 a week. Save Finance distributed 400,000 a month.

Solana's USDS balance peaked at $131.6 million on March 12, 2025. It is $9.45 million now, down 93 percent from that high. The decline has no cliff in it: the balance slid from $48.4 million on June 25 to $11.9 million on July 20, losing a little every single day across four weeks. Nobody pulled a switch. Holders left one at a time.

What This Changes for You

If you hold USDS or its savings token sUSDS, the practical question is where to keep it and what to expect from a bridge. Three things follow from the data above.

• Liquidity lives on Ethereum. A $2 million balance on Base cannot absorb a large exit without slippage. The venue that can handle size is the one holding $6.5 billion.
• Bridged balances can go to zero on governance timing. July 7 was a spell execution, not a bank run. If your yield strategy depends on a Sky-supplied pool existing on an L2, a vote you did not follow can end it overnight.
• "Available on seven chains" is a marketing claim. It says a contract is deployed. It says nothing about whether anyone is there.

One number cuts the other way, and it deserves saying plainly. The peg held through all of it. USDS traded at $0.9999 on August 14, and neither the L2 withdrawal nor the $888 million Ethereum redemption produced any discount at all. A $1.6 billion supply contraction inside three weeks has broken algorithmic designs before. USDS is crypto-backed and overcollateralized, the redemptions cleared at par, and that is the part of Sky's engineering that actually worked this summer.

The Test to Apply Next Time

Robinhood Chain and X Layer are next on Spark's list, and both will get a press cycle. Watch the opening balance. If it lands on a round number and holds it, you are looking at Sky's treasury allocating capital, and the chain's users have not shown up. If it moves in uneven amounts day after day, someone is genuinely transacting there.

Run that test across the seven chains USDS already occupies and exactly one of them passes.