diff --git a/modules/sdk-coin-ton/src/lib/constants.ts b/modules/sdk-coin-ton/src/lib/constants.ts
index 3d0ba69bcb..753d600e43 100644
--- a/modules/sdk-coin-ton/src/lib/constants.ts
+++ b/modules/sdk-coin-ton/src/lib/constants.ts
@@ -4,3 +4,4 @@ export const JETTON_TRANSFER_OPCODE = 0x0f8a7ea5;
 export const WITHDRAW_OPCODE = '00001000';
 export const VESTING_CONTRACT_CODE_B64 =
   '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';
+export const TON_WHALES_DEPOSIT_OPCODE = '2077040623';
diff --git a/modules/sdk-coin-ton/src/lib/tonWhalesDepositBuilder.ts b/modules/sdk-coin-ton/src/lib/tonWhalesDepositBuilder.ts
new file mode 100644
index 0000000000..872568860f
--- /dev/null
+++ b/modules/sdk-coin-ton/src/lib/tonWhalesDepositBuilder.ts
@@ -0,0 +1,43 @@
+import { BaseCoin as CoinConfig } from '@bitgo/statics';
+import { Recipient, TransactionType } from '@bitgo/sdk-core';
+import { TransactionBuilder } from './transactionBuilder';
+import { Transaction } from './transaction';
+import { TON_WHALES_DEPOSIT_OPCODE } from './constants';
+
+export class TonWhalesDepositBuilder extends TransactionBuilder {
+  constructor(_coinConfig: Readonly<CoinConfig>) {
+    super(_coinConfig);
+    this._transaction = new Transaction(_coinConfig);
+  }
+
+  protected get transactionType(): TransactionType {
+    return TransactionType.TonWhalesDeposit;
+  }
+
+  setDepositMessage(queryId?: string): TonWhalesDepositBuilder {
+    // Deposit payload is just OpCode + QueryId.
+    // The Amount is in the transaction value (recipient.amount)
+    // The Gas Limit is hardcoded in Transaction.ts build()
+    const qId = queryId || '0000000000000000';
+    this.transaction.message = TON_WHALES_DEPOSIT_OPCODE + qId;
+    return this;
+  }
+
+  setDepositAmount(amount: string): TonWhalesDepositBuilder {
+    if (!this.transaction.recipient) {
+      this.transaction.recipient = { address: '', amount: amount };
+    } else {
+      this.transaction.recipient.amount = amount;
+    }
+    return this;
+  }
+
+  send(recipient: Recipient): TonWhalesDepositBuilder {
+    this.transaction.recipient = recipient;
+    return this;
+  }
+
+  setMessage(msg: string): TonWhalesDepositBuilder {
+    throw new Error('Method not implemented.');
+  }
+}
diff --git a/modules/sdk-coin-ton/src/lib/transaction.ts b/modules/sdk-coin-ton/src/lib/transaction.ts
index 3088bc7558..6e9f9609f7 100644
--- a/modules/sdk-coin-ton/src/lib/transaction.ts
+++ b/modules/sdk-coin-ton/src/lib/transaction.ts
@@ -5,7 +5,13 @@ import { Cell } from 'tonweb/dist/types/boc/cell';
 import { BaseKey, BaseTransaction, Entry, Recipient, TransactionRecipient, TransactionType } from '@bitgo/sdk-core';
 import { BaseCoin as CoinConfig } from '@bitgo/statics';
 import { TransactionExplanation, TxData } from './iface';
-import { WITHDRAW_OPCODE, WALLET_ID, JETTON_TRANSFER_OPCODE, VESTING_CONTRACT_WALLET_ID } from './constants';
+import {
+  WITHDRAW_OPCODE,
+  WALLET_ID,
+  JETTON_TRANSFER_OPCODE,
+  VESTING_CONTRACT_WALLET_ID,
+  TON_WHALES_DEPOSIT_OPCODE,
+} from './constants';
 
 export class Transaction extends BaseTransaction {
   public recipient: Recipient;
@@ -127,6 +133,11 @@ export class Transaction extends BaseTransaction {
             payloadCell.bits.writeUint(parseInt(WITHDRAW_OPCODE, 16), 32);
             payloadCell.bits.writeUint(parseInt(queryId, 16), 64);
             payloadCell.bits.writeCoins(new BN(withdrawAmount));
+          } else if (payload.length >= 26 && payload.substring(0, 10) === TON_WHALES_DEPOSIT_OPCODE) {
+            const queryId = payload.substring(10, 26);
+            payloadCell.bits.writeUint(parseInt(TON_WHALES_DEPOSIT_OPCODE, 10), 32);
+            payloadCell.bits.writeUint(parseInt(queryId, 16), 64);
+            payloadCell.bits.writeCoins(TonWeb.utils.toNano('1'));
           } else {
             payloadCell.bits.writeUint(0, 32);
             payloadCell.bits.writeString(payload);
@@ -369,6 +380,13 @@ export class Transaction extends BaseTransaction {
             forwardTonAmount: forwardTonAmount.toString(),
             message: message,
           };
+        } else if (opcode === parseInt(TON_WHALES_DEPOSIT_OPCODE, 10)) {
+          this.transactionType = TransactionType.TonWhalesDeposit;
+          const queryId = order.loadUint(64).toNumber();
+          // This is the gas limit, which must be read to advance the cursor
+          // We do not need to store it
+          order.loadCoins();
+          payload = TON_WHALES_DEPOSIT_OPCODE + queryId.toString(16).padStart(16, '0');
         } else {
           payload = '';
         }
diff --git a/modules/sdk-coin-ton/src/lib/transactionBuilderFactory.ts b/modules/sdk-coin-ton/src/lib/transactionBuilderFactory.ts
index dfcfc18822..c6b354db2c 100644
--- a/modules/sdk-coin-ton/src/lib/transactionBuilderFactory.ts
+++ b/modules/sdk-coin-ton/src/lib/transactionBuilderFactory.ts
@@ -6,6 +6,7 @@ import { SingleNominatorWithdrawBuilder } from './singleNominatorWithdrawBuilder
 import { Transaction } from './transaction';
 import { TokenTransferBuilder } from './tokenTransferBuilder';
 import { TokenTransaction } from './tokenTransaction';
+import { TonWhalesDepositBuilder } from './tonWhalesDepositBuilder';
 
 export class TransactionBuilderFactory extends BaseTransactionBuilderFactory {
   constructor(_coinConfig: Readonly<CoinConfig>) {
@@ -37,6 +38,9 @@ export class TransactionBuilderFactory extends BaseTransactionBuilderFactory {
         case TransactionType.SendToken:
           builder = this.getTokenTransferBuilder();
           break;
+        case TransactionType.TonWhalesDeposit:
+          builder = this.getTonWhalesDepositBuilder();
+          break;
         default:
           throw new InvalidTransactionError('unsupported transaction');
       }
@@ -70,4 +74,8 @@ export class TransactionBuilderFactory extends BaseTransactionBuilderFactory {
   getWalletInitializationBuilder(): void {
     throw new Error('Method not implemented.');
   }
+
+  getTonWhalesDepositBuilder(): TonWhalesDepositBuilder {
+    return new TonWhalesDepositBuilder(this._coinConfig);
+  }
 }
diff --git a/modules/sdk-coin-ton/test/resources/ton.ts b/modules/sdk-coin-ton/test/resources/ton.ts
index 108e3c6e06..bc82ecef89 100644
--- a/modules/sdk-coin-ton/test/resources/ton.ts
+++ b/modules/sdk-coin-ton/test/resources/ton.ts
@@ -146,3 +146,21 @@ export const signedSingleNominatorWithdrawTransaction = {
     amount: '123400000',
   },
 };
+
+export const signedTonWhalesDepositTransaction = {
+  recipient: {
+    //https://testnet.tonscan.org/address/kQDr9Sq482A6ikIUh5mUUjJaBUUJBrye13CJiDB-R31_l7mg
+    address: 'EQDr9Sq482A6ikIUh5mUUjJaBUUJBrye13CJiDB-R31_lwIq',
+    amount: '10000000000', // 10 TON
+  },
+  // This is the raw TX from sandboxing a deposit to Ton Whales
+  tx: 'te6cckEBAgEAvAAB4YgAyB87FgBG4jQNUAYzcmw2aJG9QQeQmtOPGsRPvX+eMdwFf6OLyGMsPoPXNPLUqMoUZTIrdu2maNNUK52q+Wa0BJhNq9e/qHXYsF9xU5TYbOsZt1EBGJf1GpkumdgXj0/4CU1NGLtKFdHwAAAC4AAcAQCLYgB1+pVcebAdRSEKQ8zKKRktAqKEg15Pa7hExBg/I76/y6gSoF8gAAAAAAAAAAAAAAAAAAB7zR/vAAAAAGlCugJDuaygCErRw2Y=',
+  seqno: 92,
+  queryId: '000000006942ba02',
+  expireTime: 1765980734,
+  sender: 'EQBkD52LACNxGgaoAxm5Nhs0SN6gg8hNaceNYifev88Y7qoZ',
+  publicKey: '9d6d3714aeb1f007f6e6aa728f79fdd005ea2c7ad459b2f54d73f9e672426230',
+  signature:
+    'aff471790c6587d07ae69e5a9519428ca6456eddb4cd1a6a8573b55f2cd6809309b57af7f50ebb160bee2a729b0d9d6336ea202312fea35325d33b02f1e9ff01',
+  bounceable: true,
+};
diff --git a/modules/sdk-coin-ton/test/unit/tonWhalesDepositBuilder.ts b/modules/sdk-coin-ton/test/unit/tonWhalesDepositBuilder.ts
new file mode 100644
index 0000000000..9ff3245b71
--- /dev/null
+++ b/modules/sdk-coin-ton/test/unit/tonWhalesDepositBuilder.ts
@@ -0,0 +1,93 @@
+import should from 'should';
+import { TransactionType } from '@bitgo/sdk-core';
+import { TransactionBuilderFactory } from '../../src'; // Adjust path as needed
+import { coins } from '@bitgo/statics';
+import * as testData from '../resources/ton';
+import { TON_WHALES_DEPOSIT_OPCODE } from '../../src/lib/constants';
+
+describe('Ton Whales Deposit Builder', () => {
+  const factory = new TransactionBuilderFactory(coins.get('tton'));
+  const fixture = testData.signedTonWhalesDepositTransaction;
+
+  it('should parse a raw transaction and extract correct parameters', async function () {
+    const txBuilder = factory.from(fixture.tx);
+    const builtTx = await txBuilder.build();
+    const jsonTx = builtTx.toJson();
+
+    // Verify Business Logic Fields
+    should.equal(builtTx.type, TransactionType.TonWhalesDeposit);
+    should.equal(jsonTx.amount, fixture.recipient.amount);
+    should.equal(jsonTx.destination, fixture.recipient.address);
+    should.equal(jsonTx.sender, fixture.sender);
+
+    // Verify Network Constraints
+    should.equal(jsonTx.seqno, fixture.seqno);
+    should.equal(jsonTx.expirationTime, fixture.expireTime);
+    should.equal(jsonTx.bounceable, fixture.bounceable);
+
+    // Verify Payload Structure (OpCode Check)
+    const msg = builtTx['message'] || '';
+    should.equal(msg.startsWith(TON_WHALES_DEPOSIT_OPCODE), true);
+  });
+
+  it('should parse and rebuild the transaction resulting in the same hex', async function () {
+    const txBuilder = factory.from(fixture.tx);
+    const builtTx = await txBuilder.build();
+
+    // Verify the parser extracted the signature
+    const signature = builtTx.signature[0];
+    should.exist(signature);
+    signature.should.not.be.empty();
+
+    // Rebuild from the parsed object
+    const builder2 = factory.from(builtTx.toBroadcastFormat());
+    const builtTx2 = await builder2.build();
+
+    // The output of the second build should match the original raw transaction
+    should.equal(builtTx2.toBroadcastFormat(), fixture.tx);
+    should.equal(builtTx2.type, TransactionType.TonWhalesDeposit);
+  });
+
+  it('should build a transaction from scratch that byte-for-byte matches the raw fixture', async function () {
+    const builder = factory.getTonWhalesDepositBuilder();
+
+    // Set Header Info from Fixture
+    builder.sender(fixture.sender);
+    builder.publicKey(fixture.publicKey);
+    builder.sequenceNumber(fixture.seqno);
+    builder.expireTime(fixture.expireTime);
+    builder.bounceable(fixture.bounceable);
+
+    // Set Staking Info from Fixture
+    builder.send({
+      address: fixture.recipient.address,
+      amount: fixture.recipient.amount,
+    });
+    builder.setDepositAmount(fixture.recipient.amount);
+
+    // Set the specific QueryID from Fixture so binary hash matches
+    builder.setDepositMessage(fixture.queryId);
+
+    // Attach Signature from Fixture (Mocking the HSM signing process)
+    if (fixture.signature) {
+      builder.addSignature({ pub: fixture.publicKey }, Buffer.from(fixture.signature, 'hex'));
+    }
+
+    // Build Signed Transaction
+    const signedBuiltTx = await builder.build();
+
+    // Final Assertion: Byte-for-byte equality with the Sandbox output
+    should.equal(signedBuiltTx.toBroadcastFormat(), fixture.tx);
+    should.equal(signedBuiltTx.type, TransactionType.TonWhalesDeposit);
+  });
+
+  it('should parse the bounceable flag correctly', async function () {
+    const txBuilder = factory.from(fixture.tx);
+    const tx = await txBuilder.build();
+
+    // The fixture is set to true, so the parser must reflect that
+    const isBounceable = tx.toJson().bounceable;
+    should.equal(isBounceable, fixture.bounceable);
+    should.equal(typeof isBounceable, 'boolean');
+  });
+});
diff --git a/modules/sdk-core/src/account-lib/baseCoin/enum.ts b/modules/sdk-core/src/account-lib/baseCoin/enum.ts
index 6433f84c05..7153f7195f 100644
--- a/modules/sdk-core/src/account-lib/baseCoin/enum.ts
+++ b/modules/sdk-core/src/account-lib/baseCoin/enum.ts
@@ -119,6 +119,10 @@ export enum TransactionType {
 
   // flrp
   ImportToC,
+
+  // ton whales
+  TonWhalesDeposit,
+  TonWhalesWithdraw,
 }
 
 /**