diff --git a/web3.js/module.flow.js b/web3.js/module.flow.js
index 4890bd5b40..f7090c64ee 100644
--- a/web3.js/module.flow.js
+++ b/web3.js/module.flow.js
@@ -34,8 +34,10 @@ declare module '@solana/web3.js' {
 
   // === src/connection.js ===
   declare export type AccountInfo = {
-    tokens: number,
+    executable: boolean;
+    loaderProgramId: PublicKey,
     programId: PublicKey,
+    tokens: number,
     userdata: Buffer,
   }
 
@@ -67,7 +69,6 @@ declare module '@solana/web3.js' {
     ): Transaction;
     static move(from: PublicKey, to: PublicKey, amount: number): Transaction;
     static assign(from: PublicKey, programId: PublicKey): Transaction;
-    static load(from: PublicKey, programId: PublicKey, name: string): Transaction;
   }
 
   // === src/transaction.js ===
@@ -152,4 +153,20 @@ declare module '@solana/web3.js' {
     ): Promise<void>;
   }
 
+  // === src/loader.js ===
+  declare export class Loader {
+    constructor(connection: Connection, programId: PublicKey) : Loader;
+    load(program: Account, offset: number, bytes: Array<number>): Promise<void>;
+    finalize(program: Account): Promise<void>;
+  }
+
+  // === src/native-loader.js ===
+  declare export class NativeLoader {
+    static programId: PublicKey;
+    static load(
+      connection: Connection,
+      owner: Account,
+      programName: string,
+    ): Promise<PublicKey>;
+  }
 }
diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
index d37f0d0b25..91e1f1226c 100644
--- a/web3.js/src/connection.js
+++ b/web3.js/src/connection.js
@@ -83,6 +83,8 @@ function jsonRpcResult(resultDescription: any) {
  * Expected JSON RPC response for the "getAccountInfo" message
  */
 const GetAccountInfoRpcResult = jsonRpcResult({
+  executable: 'boolean',
+  loader_program_id: 'array',
   program_id: 'array',
   tokens: 'number',
   userdata: 'array',
@@ -138,8 +140,9 @@ const SendTokensRpcResult = jsonRpcResult('string');
  * @property {?Buffer} userdata Optional userdata assigned to the account
  */
 type AccountInfo = {
-  tokens: number,
+  executable: boolean;
   programId: PublicKey,
+  tokens: number,
   userdata: Buffer,
 }
 
@@ -201,8 +204,10 @@ export class Connection {
     assert(typeof result !== 'undefined');
 
     return {
+      executable: result.executable,
       tokens: result.tokens,
       programId: new PublicKey(result.program_id),
+      loaderProgramId: new PublicKey(result.loader_program_id),
       userdata: Buffer.from(result.userdata),
     };
   }
diff --git a/web3.js/src/index.js b/web3.js/src/index.js
index 615e4f5f8f..1519ca9d93 100644
--- a/web3.js/src/index.js
+++ b/web3.js/src/index.js
@@ -2,7 +2,9 @@
 export {Account} from './account';
 export {BudgetProgram} from './budget-program';
 export {Connection} from './connection';
+export {Loader} from './loader';
+export {NativeLoader} from './native-loader';
 export {PublicKey} from './publickey';
 export {SystemProgram} from './system-program';
-export {Transaction} from './transaction';
 export {Token, TokenAmount} from './token-program';
+export {Transaction} from './transaction';
diff --git a/web3.js/src/loader.js b/web3.js/src/loader.js
new file mode 100644
index 0000000000..1c9255db73
--- /dev/null
+++ b/web3.js/src/loader.js
@@ -0,0 +1,97 @@
+// @flow
+
+import * as BufferLayout from 'buffer-layout';
+
+import {PublicKey, Transaction} from '.';
+import {sendAndConfirmTransaction} from './util/send-and-confirm-transaction';
+import type {Account, Connection} from '.';
+
+/**
+ * Program loader interface
+ */
+export class Loader {
+  /**
+   * @private
+   */
+  connection: Connection;
+
+  /**
+   * @private
+   */
+  programId: PublicKey;
+
+  /**
+   * @param connection The connection to use
+   * @param programId Public key that identifies the loader
+   */
+  constructor(connection: Connection, programId: PublicKey) {
+    Object.assign(this, {connection, programId});
+  }
+
+  /**
+   * Load program data
+   *
+   * @param program Account to load the program info
+   * @param offset Account userdata offset to write `bytes` into
+   * @param bytes Program data
+   */
+  async load(program: Account, offset: number, bytes: Array<number>) {
+    const userdataLayout = BufferLayout.struct([
+      BufferLayout.u32('instruction'),
+      BufferLayout.u32('offset'),
+      BufferLayout.u32('bytesLength'),
+      BufferLayout.u32('bytesLengthPadding'),
+      BufferLayout.seq(
+        BufferLayout.u8('byte'),
+        BufferLayout.offset(BufferLayout.u32(), -8),
+        'bytes'
+      ),
+    ]);
+
+    let userdata = Buffer.alloc(bytes.length + 16);
+    userdataLayout.encode(
+      {
+        instruction: 0, // Load instruction
+        offset,
+        bytes,
+      },
+      userdata,
+    );
+
+    const transaction = new Transaction({
+      fee: 0,
+      keys: [program.publicKey],
+      programId: this.programId,
+      userdata,
+    });
+    await sendAndConfirmTransaction(this.connection, program, transaction);
+  }
+
+  /**
+   * Finalize an account loaded with program data for execution
+   *
+   * @param program `load()`ed Account
+   */
+  async finalize(program: Account) {
+    const userdataLayout = BufferLayout.struct([
+      BufferLayout.u32('instruction'),
+    ]);
+
+    const userdata = Buffer.alloc(userdataLayout.span);
+    console.log('sp',userdataLayout.span);
+    userdataLayout.encode(
+      {
+        instruction: 1, // Finalize instruction
+      },
+      userdata,
+    );
+
+    const transaction = new Transaction({
+      fee: 0,
+      keys: [program.publicKey],
+      programId: this.programId,
+      userdata,
+    });
+    await sendAndConfirmTransaction(this.connection, program, transaction);
+  }
+}
diff --git a/web3.js/src/native-loader.js b/web3.js/src/native-loader.js
new file mode 100644
index 0000000000..327ba2e136
--- /dev/null
+++ b/web3.js/src/native-loader.js
@@ -0,0 +1,50 @@
+// @flow
+
+import {Account, PublicKey, Loader, SystemProgram} from '.';
+import {sendAndConfirmTransaction} from './util/send-and-confirm-transaction';
+import type {Connection} from '.';
+
+/**
+ * Factory class for transactions to interact with a program loader
+ */
+export class NativeLoader {
+  /**
+   * Public key that identifies the NativeLoader
+   */
+  static get programId(): PublicKey {
+    return new PublicKey('0x0202020202020202020202020202020202020202020202020202020202020202');
+  }
+
+  /**
+   * Loads a native program
+   *
+   * @param connection The connection to use
+   * @param owner User account to load the program with
+   * @param programName Name of the native program
+   */
+  static async load(
+    connection: Connection,
+    owner: Account,
+    programName: string,
+  ): Promise<PublicKey> {
+    const bytes = [...Buffer.from(programName)];
+
+    const programAccount = new Account();
+
+    // Allocate memory for the program account
+    const transaction = SystemProgram.createAccount(
+      owner.publicKey,
+      programAccount.publicKey,
+      1,
+      bytes.length + 1,
+      NativeLoader.programId,
+    );
+    await sendAndConfirmTransaction(connection, owner, transaction);
+
+    const loader = new Loader(connection, NativeLoader.programId);
+    await loader.load(programAccount, 0, bytes);
+    await loader.finalize(programAccount);
+
+    return programAccount.publicKey;
+  }
+}
diff --git a/web3.js/src/system-program.js b/web3.js/src/system-program.js
index b5dc3b370d..c8cba56f10 100644
--- a/web3.js/src/system-program.js
+++ b/web3.js/src/system-program.js
@@ -105,35 +105,4 @@ export class SystemProgram {
       userdata,
     });
   }
-
-  /**
-   * Load a dynamic program.  Unstable API, will change
-   *
-   * @private
-   */
-  static load(from: PublicKey, programId: PublicKey, name: string): Transaction {
-    const userdataLayout = BufferLayout.struct([
-      BufferLayout.u32('instruction'),
-      Layout.publicKey('programId'),
-      Layout.rustString('name'),
-    ]);
-
-    let userdata = Buffer.alloc(1024);
-    const encodeLength = userdataLayout.encode(
-      {
-        instruction: 3, // Load instruction
-        programId: programId.toBuffer(),
-        name,
-      },
-      userdata,
-    );
-    userdata = userdata.slice(0, encodeLength);
-
-    return new Transaction({
-      fee: 0,
-      keys: [from],
-      programId: SystemProgram.programId,
-      userdata,
-    });
-  }
 }
diff --git a/web3.js/test/connection.test.js b/web3.js/test/connection.test.js
index 0e027d3475..ae1b086556 100644
--- a/web3.js/test/connection.test.js
+++ b/web3.js/test/connection.test.js
@@ -213,6 +213,11 @@ test('request airdrop', async () => {
         ],
         tokens: 42,
         userdata: [],
+        executable: false,
+        loader_program_id: [
+          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+        ],
       }
     }
   ]);
diff --git a/web3.js/test/native-loader.test.js b/web3.js/test/native-loader.test.js
new file mode 100644
index 0000000000..a59e35cd2c
--- /dev/null
+++ b/web3.js/test/native-loader.test.js
@@ -0,0 +1,30 @@
+// @flow
+
+import {
+  Connection,
+  NativeLoader,
+  Transaction,
+} from '../src';
+import {mockRpcEnabled} from './__mocks__/node-fetch';
+import {url} from './url';
+import {newAccountWithTokens} from './new-account-with-tokens';
+
+test('unstable - load', async () => {
+  if (mockRpcEnabled) {
+    console.log('non-live test skipped');
+    return;
+  }
+
+  const connection = new Connection(url);
+  const from = await newAccountWithTokens(connection);
+
+  const noopProgramId = await NativeLoader.load(connection, from, 'noop');
+  const noopTransaction = new Transaction({
+    fee: 0,
+    keys: [from.publicKey],
+    programId: noopProgramId,
+  });
+  const signature = await connection.sendTransaction(from, noopTransaction);
+  expect(connection.confirmTransaction(signature)).resolves.toBe(true);
+});
+
diff --git a/web3.js/test/system-program.test.js b/web3.js/test/system-program.test.js
index 63ac308292..3ece94a3b3 100644
--- a/web3.js/test/system-program.test.js
+++ b/web3.js/test/system-program.test.js
@@ -3,13 +3,8 @@
 import {
   Account,
   BudgetProgram,
-  Connection,
   SystemProgram,
-  Transaction,
 } from '../src';
-import {mockRpcEnabled} from './__mocks__/node-fetch';
-import {url} from './url';
-import {newAccountWithTokens} from './new-account-with-tokens';
 
 test('createAccount', () => {
   const from = new Account();
@@ -61,33 +56,3 @@ test('assign', () => {
   // TODO: Validate transaction contents more
 });
 
-test('unstable - load', async () => {
-  if (mockRpcEnabled) {
-    console.log('non-live test skipped');
-    return;
-  }
-
-  const connection = new Connection(url);
-  const from = await newAccountWithTokens(connection);
-  const noopProgramId = (new Account()).publicKey;
-
-  const loadTransaction = SystemProgram.load(
-    from.publicKey,
-    noopProgramId,
-    'noop',
-  );
-
-  let signature = await connection.sendTransaction(from, loadTransaction);
-  expect(connection.confirmTransaction(signature)).resolves.toBe(true);
-
-  const noopTransaction = new Transaction({
-    fee: 0,
-    keys: [from.publicKey],
-    programId: noopProgramId,
-  });
-  signature = await connection.sendTransaction(from, noopTransaction);
-  expect(connection.confirmTransaction(signature)).resolves.toBe(true);
-
-
-});
-
diff --git a/web3.js/test/token-program.test.js b/web3.js/test/token-program.test.js
index 67e48b5f7c..7fa4706d3e 100644
--- a/web3.js/test/token-program.test.js
+++ b/web3.js/test/token-program.test.js
@@ -120,6 +120,11 @@ test('create new token', async () => {
             10, 0, 0, 0, 0, 0, 0, 0, 84, 101, 115, 116, 32, 116, 111, 107, 101, 110,
             4, 0, 0, 0, 0, 0, 0, 0, 84, 69, 83, 84
           ],
+          executable: false,
+          loader_program_id: [
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+          ],
         }
       }
     ]);
@@ -153,6 +158,11 @@ test('create new token', async () => {
             16, 39, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
           ],
+          executable: false,
+          loader_program_id: [
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+          ],
         }
       }
     ]);
@@ -204,6 +214,11 @@ test('create new token account', async () => {
             0, 0, 0, 0, 0, 0, 0, 0,
             0,
           ],
+          executable: false,
+          loader_program_id: [
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+          ],
         }
       }
     ]);
@@ -256,6 +271,11 @@ test('transfer', async () => {
             123, 0, 0, 0, 0, 0, 0, 0,
             0,
           ],
+          executable: false,
+          loader_program_id: [
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+          ],
         }
       }
     ]);
@@ -293,6 +313,11 @@ test('transfer', async () => {
             123, 0, 0, 0, 0, 0, 0, 0,
             0,
           ],
+          executable: false,
+          loader_program_id: [
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+          ],
         }
       }
     ]);
@@ -355,6 +380,11 @@ test('approve/revoke', async () => {
             1,
             ...initialOwnerTokenAccount.toBuffer(),
           ],
+          executable: false,
+          loader_program_id: [
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+          ],
         }
       }
     ]);
@@ -403,6 +433,11 @@ test('approve/revoke', async () => {
             1,
             ...initialOwnerTokenAccount.toBuffer(),
           ],
+          executable: false,
+          loader_program_id: [
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+          ],
         }
       }
     ]);