diff --git a/.vscode/launch.json b/.vscode/launch.json
index aeaba250c..126386072 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -229,6 +229,7 @@
         "redacted",
         "reflexer",
         "reserve",
+        "retro",
         "ribbon-finance",
         "rocket-pool",
         "rook",
diff --git a/src/adapters/index.ts b/src/adapters/index.ts
index cb66db44a..cdebc8582 100644
--- a/src/adapters/index.ts
+++ b/src/adapters/index.ts
@@ -158,6 +158,7 @@ import railgun from '@adapters/railgun'
 import redacted from '@adapters/redacted'
 import reflexer from '@adapters/reflexer'
 import reserve from '@adapters/reserve'
+import retro from '@adapters/retro'
 import ribbonFinance from '@adapters/ribbon-finance'
 import rocketPool from '@adapters/rocket-pool'
 import rook from '@adapters/rook'
@@ -395,6 +396,7 @@ export const adapters: Adapter[] = [
   redacted,
   reflexer,
   reserve,
+  retro,
   ribbonFinance,
   rocketPool,
   rook,
diff --git a/src/adapters/retro/index.ts b/src/adapters/retro/index.ts
new file mode 100644
index 000000000..de576ddf7
--- /dev/null
+++ b/src/adapters/retro/index.ts
@@ -0,0 +1,10 @@
+import type { Adapter } from '@lib/adapter'
+
+import * as polygon from './polygon'
+
+const adapter: Adapter = {
+  id: 'retro',
+  polygon,
+}
+
+export default adapter
diff --git a/src/adapters/retro/polygon/balance.ts b/src/adapters/retro/polygon/balance.ts
new file mode 100644
index 000000000..9422b6c2b
--- /dev/null
+++ b/src/adapters/retro/polygon/balance.ts
@@ -0,0 +1,109 @@
+import { getPoolsBalances } from '@adapters/uniswap-v3/common/pools'
+import type { Balance, BalancesContext, Contract, FarmBalance } from '@lib/adapter'
+import { mapSuccessFilter } from '@lib/array'
+import { multicall } from '@lib/multicall'
+import type { Token } from '@lib/token'
+
+const abi = {
+  calculateRedeemOutputs: {
+    inputs: [{ internalType: 'uint256', name: '_amount', type: 'uint256' }],
+    name: 'calculateRedeemOutputs',
+    outputs: [{ internalType: 'uint256[]', name: '', type: 'uint256[]' }],
+    stateMutability: 'view',
+    type: 'function',
+  },
+} as const
+
+const CASH: Token = {
+  chain: 'polygon',
+  address: '0x5d066d022ede10efa2717ed3d79f22f949f8c175',
+  symbol: 'CASH',
+  decimals: 18,
+}
+
+const redeemableContract: Contract = {
+  chain: 'polygon',
+  address: '0x2d62f6d8288994c7900e9c359f8a72e84d17bfba',
+}
+
+const DAI: Token = {
+  chain: 'polygon',
+  address: '0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063',
+  decimals: 18,
+  symbol: 'DAI',
+}
+
+const USDT: Token = {
+  chain: 'polygon',
+  address: '0xc2132D05D31c914a87C6611C10748AEb04B58e8F',
+  decimals: 6,
+  symbol: 'USDT',
+}
+
+const USDC: Token = {
+  chain: 'polygon',
+  address: '0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174',
+  decimals: 6,
+  symbol: 'USDC',
+}
+
+interface CashBalances extends FarmBalance {
+  cashAmount?: bigint
+}
+
+export async function getRetroBalances(
+  ctx: BalancesContext,
+  nonFungiblePositionManager: Contract,
+  factory: Contract,
+): Promise<Balance[]> {
+  const balances: Balance[] = await getPoolsBalances(ctx, nonFungiblePositionManager, factory)
+  const fmtBalances: CashBalances[] = []
+
+  let i = 0
+  while (i < balances.length) {
+    const balance = balances[i]
+
+    if (balance.underlyings && balance.underlyings.length > 0) {
+      for (const underlying of balance.underlyings) {
+        if (underlying.address.toLowerCase() === CASH.address) {
+          fmtBalances.push({ ...(balance as CashBalances), cashAmount: (underlying as Contract).amount })
+          balances.splice(i, 1)
+          i--
+          break
+        }
+      }
+    }
+    i++
+  }
+
+  const underlyingsBalancesRes = await multicall({
+    ctx,
+    calls: fmtBalances.map(
+      (balance) => ({ target: redeemableContract.address, params: [balance.cashAmount!] }) as const,
+    ),
+    abi: abi.calculateRedeemOutputs,
+  })
+
+  const fmtUnderlyings = (output: readonly bigint[]) => {
+    const tokens = [DAI, USDT, USDC]
+
+    return output.map((amount, index) => ({
+      ...tokens[index],
+      amount,
+    }))
+  }
+
+  const fmtCash: Contract[][] = mapSuccessFilter(underlyingsBalancesRes, (res) => fmtUnderlyings(res.output))
+
+  for (const [index, fmtBalance] of fmtBalances.entries()) {
+    const fmtUnderlyingsWithoutCash = fmtBalance.underlyings?.filter(
+      (underlying) => underlying.address.toLowerCase() !== CASH.address,
+    )
+
+    if (fmtUnderlyingsWithoutCash) {
+      fmtBalance.underlyings = [...fmtUnderlyingsWithoutCash, ...fmtCash[index]]
+    }
+  }
+
+  return [...balances, ...fmtBalances]
+}
diff --git a/src/adapters/retro/polygon/index.ts b/src/adapters/retro/polygon/index.ts
new file mode 100644
index 000000000..c7933a536
--- /dev/null
+++ b/src/adapters/retro/polygon/index.ts
@@ -0,0 +1,29 @@
+import { getRetroBalances } from '@adapters/retro/polygon/balance'
+import type { Contract, GetBalancesHandler } from '@lib/adapter'
+import { resolveBalances } from '@lib/balance'
+
+export const factory: Contract = {
+  chain: 'ethereum',
+  address: '0x91e1b99072f238352f59e58de875691e20dc19c1',
+}
+
+export const nonFungiblePositionManager: Contract = {
+  chain: 'ethereum',
+  address: '0x8aac493fd8c78536ef193882aeffeaa3e0b8b5c5',
+}
+
+export const getContracts = async () => {
+  return {
+    contracts: { nonFungiblePositionManager },
+  }
+}
+
+export const getBalances: GetBalancesHandler<typeof getContracts> = async (ctx, contracts) => {
+  const balances = await resolveBalances<typeof getContracts>(ctx, contracts, {
+    nonFungiblePositionManager: (...args) => getRetroBalances(...args, factory),
+  })
+
+  return {
+    groups: [{ balances }],
+  }
+}