diff --git a/fees/bisonfi.ts b/fees/bisonfi.ts
new file mode 100644
index 0000000000..f41e99b0ef
--- /dev/null
+++ b/fees/bisonfi.ts
@@ -0,0 +1,66 @@
+import { Dependencies, FetchOptions, SimpleAdapter } from "../adapters/types";
+import { CHAIN } from "../helpers/chains";
+import { queryDuneSql } from "../helpers/dune";
+
+interface tokenFlow {
+    token: string,
+    amount_bought: number,
+    amount_sold: number
+}
+
+const fetch = async (options: FetchOptions) => {
+    const dailyRevenue = options.createBalances();
+
+    const query = `
+        SELECT
+            token,
+            COALESCE(SUM(amount_sold), 0) AS amount_sold,
+            COALESCE(SUM(amount_bought), 0) AS amount_bought
+        FROM (
+            SELECT
+                token_sold_mint_address AS token,
+                token_sold_amount_raw AS amount_sold,
+                0 AS amount_bought
+            FROM dex_solana.trades
+            WHERE project = 'bisonfi'
+            AND TIME_RANGE
+
+            UNION ALL
+
+            SELECT
+                token_bought_mint_address AS token,
+                0 AS amount_sold,
+                token_bought_amount_raw AS amount_bought
+            FROM dex_solana.trades
+            WHERE project = 'bisonfi'
+            AND TIME_RANGE
+        ) t
+        GROUP BY token
+    `;
+
+    const data = await queryDuneSql(options, query);
+    data.forEach((tokenFlow: tokenFlow) => dailyRevenue.add(tokenFlow.token, tokenFlow.amount_sold - tokenFlow.amount_bought))
+
+    return {
+        dailyFees: dailyRevenue,
+        dailyRevenue,
+        dailyProtocolRevenue: dailyRevenue,
+    };
+};
+
+const adapter: SimpleAdapter = {
+    version: 1,
+    fetch,
+    chains: [CHAIN.SOLANA],
+    start: '2025-12-05',
+    dependencies: [Dependencies.DUNE],
+    isExpensiveAdapter: true,
+    allowNegativeValue: true,
+    methodology: {
+        Fees: "Estimated from BisonFi's net trading flow as a proprietary market maker. Traders swap against BisonFi's own inventory (proprietary capital, no external liquidity providers), so the daily change in that inventory valued at current prices proxies for the spread BisonFi earns on trades.",
+        Revenue: "BisonFi's estimated daily trading PnL based on net inventory change. May diverge from actual net revenue if BisonFi hedges inventory off-chain (CEX hedges, funding costs, etc.).",
+        ProtocolRevenue: "All estimated trading revenue accrues to BisonFi, which trades entirely with its own proprietary capital.",
+    }
+};
+
+export default adapter;