diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a84a33..dfb26f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## v1.6.0 — 2026-09-26 19:35
+- **Multiplayer step 11/12 (ISS-115): leaderboard panel.** Small UI listing every player in the world with cash, reputation and plane count, rendered from snapshot data — no new endpoint. The known gap from step 8 is closed additively: `getStateSnapshot(playerId)` (`lib/game/state.ts`) now projects a `players` array (`PlayerSummary[]`: `{ id, username, cash, reputation, planeCount }`, planeCount = planes owned) into the ONE shared snapshot projection, so GET /api/state, action responses and every SSE frame all carry it in sync automatically. No extra query — the players rows were already loaded for the v1.4.0 owner joins; plane counts are a single in-memory pass over the already-loaded plane rows.
+- **UI.** New "Leaderboard" button on the right side of the map top bar (next to Admin) opens the panel as a modal, reusing the existing `Modal` + `.pane-btn` conventions — per the 2026-09-23 placement decision it is NOT embedded in the left pane. New `components/Leaderboard.tsx`: one row per player (username, cash via `formatCash`, reputation, plane count), sorted by reputation descending with cash then username as deterministic tie-breaks so rows don't shuffle between snapshots on equal rep. Small `.leaderboard` table styles mirror `.admin-rows`.
+- **OpenAPI.** New `PlayerSummary` schema; `StateSnapshot` gains required `players: PlayerSummary[]` — documented in `lib/openapi.ts`, path count unchanged at eighteen.
+- **Tests.** Unit: new `getStateSnapshot players` suite in `lib/game/state.test.ts` against a throwaway seeded DB — single-player regression guard (exactly one row for the seeded local account with its starter plane) and a two-player case asserting cash/reputation/planeCount per owner (local keeps 1, player B counts both of its planes). The `/api/state` route test's exact key-list assertion gains `players`; all four typed snapshot fixtures (`state.test.ts`, `mapData.test.ts`, `deriveEvents.test.ts`, `right-pane.test.ts`) gain the new required field. No e2e spec changes: existing specs assert per-key `toHaveProperty` on planes/packages only, and CI's single minted player sees a one-row leaderboard — behavior unchanged; the button/modal wiring is covered by tsc + the modal pattern already exercised in admin.spec.ts.
+
 ## v1.5.0 — 2026-09-26 19:06
 - **Multiplayer step 7/12 (ISS-111): shared-world spawn quality rule.** The #101 decision point is resolved with the agreed default proposal: spawned pool packages scale to the MAX reputation across ALL player rows, so job rewards track the best-progressed player and nobody is stuck on low-rep jobs. New `getSharedWorldReputation(inst)` in `lib/db/localPlayer.ts` — one SQL `MAX(reputation)` over the players table, 0 when there are no players (the rep bonus floors at ×1 either way). The engine's pool spawner (`spawnPoolPackages`, `lib/sim/engine.ts`) reads it once per spawn batch and passes it through `generatePoolPackage(..., reputation)`, replacing the last singleton `getLocalPlayer` job-quality read; the env-gated `/api/test/create-package` hook — which documents itself as carrying "the same job quality as engine spawns" — follows the same rule so no surface can drift.
 - **Sites that stay on 'local' (deliberate).** The seeded local row is still inserted at first-run seeding (`lib/db/client.ts`) and staged by the env-gated `/api/test/*` economy hooks (add-cash, set-cash) — those stage an account, not job quality. Seed-time package generation (`buildSeed`) passes no reputation at all and keeps defaulting to `STARTING_REPUTATION`, so fresh worlds are byte-identical to before.
diff --git a/app/api/packages/[id]/abandon/route.test.ts b/app/api/packages/[id]/abandon/route.test.ts
index 7822825..9bf117c 100644
--- a/app/api/packages/[id]/abandon/route.test.ts
+++ b/app/api/packages/[id]/abandon/route.test.ts
@@ -111,6 +111,7 @@ describe('POST /api/packages/:id/abandon', () => {
       'fuelPricePerL',
       'packages',
       'planes',
+      'players', // v1.6.0 (ISS-115) — leaderboard rows ride on every snapshot
       'sellFraction',
       'simState',
     ]);
diff --git a/app/api/packages/[id]/load/route.test.ts b/app/api/packages/[id]/load/route.test.ts
index cbc88ee..cf2e991 100644
--- a/app/api/packages/[id]/load/route.test.ts
+++ b/app/api/packages/[id]/load/route.test.ts
@@ -111,6 +111,7 @@ describe('POST /api/packages/:id/load', () => {
       'fuelPricePerL',
       'packages',
       'planes',
+      'players', // v1.6.0 (ISS-115) — leaderboard rows ride on every snapshot
       'sellFraction',
       'simState',
     ]);
diff --git a/app/api/planes/[planeId]/fly/route.test.ts b/app/api/planes/[planeId]/fly/route.test.ts
index d1fa2a8..c758d1d 100644
--- a/app/api/planes/[planeId]/fly/route.test.ts
+++ b/app/api/planes/[planeId]/fly/route.test.ts
@@ -102,6 +102,7 @@ describe('POST /api/planes/:planeId/fly', () => {
       'fuelPricePerL',
       'packages',
       'planes',
+      'players', // v1.6.0 (ISS-115) — leaderboard rows ride on every snapshot
       'sellFraction',
       'simState',
     ]);
diff --git a/app/api/state/route.test.ts b/app/api/state/route.test.ts
index dab4ca7..b24ce95 100644
--- a/app/api/state/route.test.ts
+++ b/app/api/state/route.test.ts
@@ -46,6 +46,7 @@ describe('GET /api/state', () => {
       'fuelPricePerL',
       'packages',
       'planes',
+      'players', // v1.6.0 (ISS-115) — leaderboard rows ride on every snapshot
       'sellFraction',
       'simState',
     ]);
diff --git a/app/globals.css b/app/globals.css
index 397f498..c05ba29 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -737,6 +737,32 @@ body {
   white-space: nowrap;
 }
 
+/* v1.6.0 (ISS-115) — leaderboard panel inside the generic modal, same table look as .admin-rows. */
+.leaderboard {
+  padding: 14px;
+  overflow-y: auto;
+}
+
+.leaderboard table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 12px;
+  font-variant-numeric: tabular-nums;
+}
+
+.leaderboard th,
+.leaderboard td {
+  padding: 4px 6px;
+  text-align: left;
+  white-space: nowrap;
+  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
+}
+
+.leaderboard th {
+  color: #94a3b8;
+  font-weight: 600;
+}
+
 /* v1.1.0 (ISS-107) — full-screen sign-in / create-account screen, same dark slate theme as the panes. */
 .sign-in {
   position: fixed;
diff --git a/components/Leaderboard.tsx b/components/Leaderboard.tsx
new file mode 100644
index 0000000..1005eea
--- /dev/null
+++ b/components/Leaderboard.tsx
@@ -0,0 +1,36 @@
+import { formatCash } from '@/lib/format';
+import type { PlayerSummary } from '@/lib/game/state';
+
+// v1.6.0 (ISS-115): leaderboard panel — every player in the world with cash, reputation and
+// plane count, rendered straight off the shared snapshot (no endpoint of its own). Sorted by
+// reputation desc; cash then username break ties deterministically so rows don't shuffle
+// between snapshots when two players share a reputation.
+export default function Leaderboard({ players }: { players: PlayerSummary[] }) {
+  const sorted = [...players].sort(
+    (a, b) => b.reputation - a.reputation || b.cash - a.cash || a.username.localeCompare(b.username),
+  );
+  return (
+    <div className="leaderboard">
+      <table data-testid="leaderboard-table">
+        <thead>
+          <tr>
+            <th>Player</th>
+            <th>Cash</th>
+            <th>Reputation</th>
+            <th>Planes</th>
+          </tr>
+        </thead>
+        <tbody>
+          {sorted.map((p) => (
+            <tr key={p.id} data-testid={`leaderboard-row-${p.id}`}>
+              <td>{p.username}</td>
+              <td>{formatCash(p.cash)}</td>
+              <td>{p.reputation}</td>
+              <td>{p.planeCount}</td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+}
diff --git a/components/Map.tsx b/components/Map.tsx
index b884d4b..92d8ac3 100644
--- a/components/Map.tsx
+++ b/components/Map.tsx
@@ -13,6 +13,7 @@ import { weatherFor } from '../lib/weather';
 import { approxLocalTime } from '../lib/localTime';
 import Modal from './Modal';
 import AdminPanel from './AdminPanel';
+import Leaderboard from './Leaderboard';
 import { sessionHeaders } from '../lib/authClient';
 
 // v0.70.0 default view: null island [0,0] at zoom 2 — the world is 2048 px wide there and the
@@ -98,6 +99,8 @@ export default function FlightMap({ state, hovered, applySnapshot, onLogout }: M
   // v0.71.0: the Admin modal (top-bar button) — unmounted while closed so it re-checks the
   // stored session on every open.
   const [adminOpen, setAdminOpen] = useState(false);
+  // v1.6.0 (ISS-115): the leaderboard panel (top-bar button) — rows come from the polled snapshot.
+  const [leaderboardOpen, setLeaderboardOpen] = useState(false);
 
   // Push the latest planes/routes GeoJSON into whatever sources currently exist.
   // No-op until the map (and for routes: the airport index) is ready — the mount
@@ -589,6 +592,10 @@ export default function FlightMap({ state, hovered, applySnapshot, onLogout }: M
         <span data-testid="airport-count">
           {airportCount === null ? 'loading airports…' : `${airportCount} world airports`}
         </span>
+        {/* v1.6.0 (ISS-115): leaderboard panel entry point — right side of the top bar, opens a modal. */}
+        <button type="button" data-testid="leaderboard-btn" className="pane-btn" onClick={() => setLeaderboardOpen(true)}>
+          Leaderboard
+        </button>
         {/* v0.71.0: admin panel entry point — right side of the top bar, opens a modal (no URL). */}
         <button type="button" data-testid="admin-btn" className="pane-btn" onClick={() => setAdminOpen(true)}>
           Admin
@@ -598,6 +605,10 @@ export default function FlightMap({ state, hovered, applySnapshot, onLogout }: M
       <Modal open={adminOpen} onClose={() => setAdminOpen(false)} title="Admin">
         <AdminPanel onLogout={onLogout} />
       </Modal>
+      {/* v1.6.0 (ISS-115): leaderboard — players from the shared snapshot, no extra endpoint. */}
+      <Modal open={leaderboardOpen} onClose={() => setLeaderboardOpen(false)} title="Leaderboard">
+        <Leaderboard players={state?.players ?? []} />
+      </Modal>
     </div>
   );
 }
diff --git a/components/right-pane.test.ts b/components/right-pane.test.ts
index 7e1e9ec..59ca889 100644
--- a/components/right-pane.test.ts
+++ b/components/right-pane.test.ts
@@ -60,6 +60,7 @@ function snap(planes: PlaneState[], packages: PackageState[] = []): StateSnapsho
     account: { cash: 0, reputation: 0 },
     simState: { clockMs: 0 },
     planes,
+    players: [], // v1.6.0 (ISS-115) — leaderboard rows; unused by the right pane
     packages,
     catalog: CATALOG,
     fuelPricePerL: 0.8,
diff --git a/lib/deriveEvents.test.ts b/lib/deriveEvents.test.ts
index 65574b0..e9f6f28 100644
--- a/lib/deriveEvents.test.ts
+++ b/lib/deriveEvents.test.ts
@@ -53,6 +53,7 @@ const snapshot = (over: Partial<StateSnapshot> = {}): StateSnapshot => ({
   account: { cash: 20_000, reputation: 10 },
   simState: { clockMs: 0 },
   planes: [basePlane('plane-starter')],
+  players: [], // v1.6.0 (ISS-115) — leaderboard rows; unused by the event diffing
   packages: [],
   catalog: CATALOG,
   fuelPricePerL: 0.8,
diff --git a/lib/game/state.test.ts b/lib/game/state.test.ts
index 657f0b5..51c297b 100644
--- a/lib/game/state.test.ts
+++ b/lib/game/state.test.ts
@@ -1,5 +1,12 @@
-import { describe, expect, it } from 'vitest';
-import { SSE_PACKAGE_STATUSES, sseFrame, type PackageState, type StateSnapshot } from './state';
+import fs from 'node:fs/promises';
+import os from 'node:os';
+import path from 'node:path';
+import { afterAll, beforeAll, describe, expect, it } from 'vitest';
+import * as schema from '@/lib/db/schema';
+import { getGameDb } from '@/lib/db/client';
+import { PLANE_TYPES } from './catalog';
+import { STARTING_CASH, STARTING_REPUTATION } from './seed';
+import { getStateSnapshot, SSE_PACKAGE_STATUSES, sseFrame, type PackageState, type StateSnapshot } from './state';
 
 // ISS-133 (v0.59.0) — the SSE projection keeps only the package statuses any component renders.
 
@@ -30,6 +37,7 @@ const snapshot = (packages: PackageState[]): StateSnapshot => ({
   fuelPricePerL: 0.8,
   sellFraction: 0.5,
   planes: [],
+  players: [], // v1.6.0 (ISS-115) — leaderboard rows; empty in these sseFrame fixtures
   packages,
 });
 
@@ -60,3 +68,48 @@ describe('sseFrame', () => {
     expect([...SSE_PACKAGE_STATUSES].sort()).toEqual(['expired', 'loaded', 'open']);
   });
 });
+
+// v1.6.0 (ISS-115) — the snapshot's players array: one row per player with cash/reputation and
+// how many planes they own. Runs against a throwaway seeded DB via the app singleton, exactly
+// like the /api/state route tests (fresh module registry per file ⇒ fresh singleton).
+describe('getStateSnapshot players', () => {
+  let dir: string;
+
+  beforeAll(async () => {
+    dir = await fs.mkdtemp(path.join(os.tmpdir(), 'flight-snapshot-players-'));
+    process.env.FLIGHT_DB_PATH = path.join(dir, 'players.db');
+    await getGameDb(); // seeds the local player + starter plane
+  });
+
+  afterAll(async () => {
+    delete process.env.FLIGHT_DB_PATH;
+    await fs.rm(dir, { recursive: true, force: true });
+  });
+
+  it('single-player regression guard — one row for the seeded local account', async () => {
+    const snap = await getStateSnapshot('local');
+    expect(snap.players).toEqual([
+      { id: 'local', username: 'kamilkrzywda', cash: STARTING_CASH, reputation: STARTING_REPUTATION, planeCount: 1 },
+    ]);
+  });
+
+  it('two players — cash/reputation/planeCount per owner (v1.6.0, ISS-115)', async () => {
+    const inst = await getGameDb();
+    // A second account with a distinct economy and two planes of its own — rows minted like /api/register does.
+    await inst.db.insert(schema.players).values({ id: 'b', provider: 'local', username: 'player-b', cash: 5_000, reputation: 3 });
+    const type = PLANE_TYPES.atr72;
+    for (const id of ['plane-b-1', 'plane-b-2']) {
+      await inst.db.insert(schema.planes).values({
+        id, ownerId: 'b', model: 'atr72', status: 'available',
+        fuel: type.maxFuel, maxFuel: type.maxFuel, locationIcao: 'EDDF', lat: 50.03, lon: 8.56,
+      });
+    }
+
+    const snap = await getStateSnapshot('b'); // any session sees the whole world's players
+    expect(snap.players).toHaveLength(2);
+    const local = snap.players.find((p) => p.id === 'local')!;
+    expect(local).toEqual({ id: 'local', username: 'kamilkrzywda', cash: STARTING_CASH, reputation: STARTING_REPUTATION, planeCount: 1 }); // starter still counted once…
+    const b = snap.players.find((p) => p.id === 'b')!;
+    expect(b).toEqual({ id: 'b', username: 'player-b', cash: 5_000, reputation: 3, planeCount: 2 }); // …and both of B's planes count for B.
+  });
+});
diff --git a/lib/game/state.ts b/lib/game/state.ts
index ced0916..f85acda 100644
--- a/lib/game/state.ts
+++ b/lib/game/state.ts
@@ -97,12 +97,25 @@ export interface PackageState {
   carrierName: string | null;
 }
 
+// v1.6.0 (ISS-115): per-player summary for the leaderboard panel — rides on every snapshot
+// (GET /api/state + SSE frames), so no new endpoint is needed. planeCount = planes owned.
+export interface PlayerSummary {
+  id: string;
+  username: string;
+  cash: number;
+  reputation: number;
+  planeCount: number;
+}
+
 export interface StateSnapshot {
   account: { cash: number; reputation: number };
   // ISS-117 (v0.52.0): the world rate is a fixed constant (WORLD_TIME_SCALE), not per-save state —
   // only the clock itself is reported here.
   simState: { clockMs: number };
   planes: PlaneState[];
+  // v1.6.0 (ISS-115): leaderboard data — one row per player, projected from the same players +
+  // planes reads as everything else in this snapshot (no extra query).
+  players: PlayerSummary[];
   packages: PackageState[];
   // Market reference data (v0.10.0) — static per build, sent with every snapshot so
   // the client can compute buy/sell previews without a separate endpoint.
@@ -166,6 +179,10 @@ export async function getStateSnapshot(playerId: string): Promise<StateSnapshot>
   const usernameByPlayerId = new Map(playerRows.map((pl) => [pl.id, pl.username]));
   const planeById = new Map(planeRows.map((p) => [p.id, p]));
 
+  // v1.6.0 (ISS-115): leaderboard — count owned planes per player from the rows already loaded above.
+  const planeCountByOwner = new Map<string, number>();
+  for (const p of planeRows) planeCountByOwner.set(p.ownerId, (planeCountByOwner.get(p.ownerId) ?? 0) + 1);
+
   // Analytic movement (v0.7.0): a flying plane's stored lat/lon/fuel are its
   // departure values — live position and fuel are pure functions of the clock.
   const livePlane = (p: schema.PlaneRow) => {
@@ -218,6 +235,14 @@ export async function getStateSnapshot(playerId: string): Promise<StateSnapshot>
         ownerName: usernameByPlayerId.get(p.ownerId) ?? p.ownerId, // missing players row → raw id, never a crash
       };
     }),
+    // v1.6.0 (ISS-115): leaderboard rows — every player in the world with their economy + fleet size.
+    players: playerRows.map((pl) => ({
+      id: pl.id,
+      username: pl.username,
+      cash: pl.cash,
+      reputation: pl.reputation,
+      planeCount: planeCountByOwner.get(pl.id) ?? 0,
+    })),
     packages: packageRows.filter((p) => p.status !== 'open' || pool.has(p.originIcao)).map((p) => ({
         id: p.id,
         originIcao: p.originIcao,
diff --git a/lib/mapData.test.ts b/lib/mapData.test.ts
index 9d57428..697e251 100644
--- a/lib/mapData.test.ts
+++ b/lib/mapData.test.ts
@@ -36,6 +36,7 @@ function snapshot(overrides: Partial<StateSnapshot> = {}): StateSnapshot {
     account: { cash: 0, reputation: 0 },
     simState: { clockMs: 0 },
     planes: [],
+    players: [], // v1.6.0 (ISS-115) — leaderboard rows; unused by the map projections
     packages: [],
     catalog: [
       { model: 'atr72', label: 'ATR 72-600', price: 200_000, maxFuel: 6300, burnPerKm: 1.75, emptyWeightKg: 9_300, speedKmh: 510, maxPayloadKg: 4_800 },
diff --git a/lib/openapi.test.ts b/lib/openapi.test.ts
index 50e725e..ae967a1 100644
--- a/lib/openapi.test.ts
+++ b/lib/openapi.test.ts
@@ -77,6 +77,7 @@ describe('OpenAPI spec', () => {
       'fuelPricePerL',
       'packages',
       'planes',
+      'players', // v1.6.0 (ISS-115) — leaderboard rows ride on every snapshot
       'sellFraction',
       'simState',
     ]);
@@ -86,12 +87,14 @@ describe('OpenAPI spec', () => {
       'fuelPricePerL',
       'packages',
       'planes',
+      'players', // v1.6.0 (ISS-115) — leaderboard rows ride on every snapshot
       'sellFraction',
       'simState',
     ]);
     expect(snap.account.$ref).toBe('#/components/schemas/AccountState');
     expect(snap.simState.$ref).toBe('#/components/schemas/SimState');
     expect(snap.planes.items.$ref).toBe('#/components/schemas/PlaneState');
+    expect(snap.players.items.$ref).toBe('#/components/schemas/PlayerSummary'); // v1.6.0 (ISS-115)
     expect(snap.packages.items.$ref).toBe('#/components/schemas/PackageState');
     expect(snap.catalog.items.$ref).toBe('#/components/schemas/CatalogEntry');
     expect(snap.fuelPricePerL.type).toBe('number');
diff --git a/lib/openapi.ts b/lib/openapi.ts
index 2a10cd4..1790f75 100644
--- a/lib/openapi.ts
+++ b/lib/openapi.ts
@@ -707,6 +707,11 @@ export const openApiSpec = {
             type: 'array',
             items: { $ref: '#/components/schemas/PlaneState' },
           },
+          players: {
+            type: 'array',
+            description: 'Leaderboard rows (v1.6.0, ISS-115) — one per player in the world.',
+            items: { $ref: '#/components/schemas/PlayerSummary' },
+          },
           packages: {
             type: 'array',
             items: { $ref: '#/components/schemas/PackageState' },
@@ -719,7 +724,7 @@ export const openApiSpec = {
           fuelPricePerL: { type: 'number', description: 'Jet-A1 price in €/liter; the automatic dispatch top-up costs liters × this, reduced by a reputation-scaled discount at refuel time (v0.38.0) — ISS-082 (v0.42.0): it now applies to the auto-refuel on /fly and the engine\'s chained-leg top-ups.' },
           sellFraction: { type: 'number', description: 'Fraction of the catalog price paid out when selling a plane.' },
         },
-        required: ['account', 'simState', 'planes', 'packages', 'catalog', 'fuelPricePerL', 'sellFraction'],
+        required: ['account', 'simState', 'planes', 'players', 'packages', 'catalog', 'fuelPricePerL', 'sellFraction'],
       },
       CatalogEntry: {
         type: 'object',
@@ -750,6 +755,18 @@ export const openApiSpec = {
         },
         required: ['clockMs'],
       },
+      PlayerSummary: {
+        type: 'object',
+        description: 'One leaderboard row (v1.6.0, ISS-115) — a player\'s economy plus how many planes they own.',
+        properties: {
+          id: { type: 'string' },
+          username: { type: 'string' },
+          cash: { type: 'number' },
+          reputation: { type: 'number' },
+          planeCount: { type: 'integer', description: 'Number of planes in the world owned by this player.' },
+        },
+        required: ['id', 'username', 'cash', 'reputation', 'planeCount'],
+      },
       LoadPackageRequest: {
         type: 'object',
         properties: {
diff --git a/package.json b/package.json
index 03badc1..f153815 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "flight-ops",
-  "version": "1.5.0",
+  "version": "1.6.0",
   "private": true,
   "scripts": {
     "dev": "next dev -p 3000",