QUBT

$8.8404

$

Quantum Computing, Inc. focuses on providing software tools and applications for quantum computers in Virginia. The company offers Qatalyst, a quantum application accelerator that enables developers to create and execute quantum-ready applications on conventional computers, while being ready to run on quantum computers as well as provides multiple quantum processing units including DWave, Rigetti, and IonQ. It focuses on serving commercial and government entities. The company, formerly known as Innovative Beverage Group Holdings, Inc. Quantum Computing, Inc. was founded in 2018 and is based in Leesburg, Virginia.

Next Earnings

2026-02-25

Beta

3.485

Average Volume

Market Cap

Last Dividend

CIK

0001758009

ISIN

US74766W1080

CUSIP

74766W108

CEO

Yuping Huang

Sector

Technology

Industry

Computer Hardware

Full Time Employees

41

IPO Date

2007-02-01

Status

Active

Latest News

Title Headline Publisher Date
Quantum Stock Crunch: Repricing Or Red Flag? Quantum computing stocks have plunged far more than the broader tech rotation as investors reassess stretched valuations and the viability of early-stage, pre-profit business models. The four most widely followed pure-play quantum stocks are down more than 30% on average in the past month, yet still trade at 100x to nearly 2,000x sales. The quantum computing market could reach $198B by 2040, from roughly $1B today, according to Jefferies analysts, as the tech moves out of the lab into the real world. Seeking Alpha 2026-02-24 14:11:55
Quantum Computing Inc. to Host Fourth Quarter And Full Year 2025 Shareholder Call on Monday, March 2, 2026 HOBOKEN, N.J., Feb. 24, 2026 /PRNewswire/ -- Quantum Computing Inc. PRNewsWire 2026-02-24 08:30:00
Quantum Computing Inc. Positions Itself Between Quantum Hardware and Enterprise Adoption as Anson Funds Exits Anson Funds Management LP sold 5,373,455 shares of Quantum Computing; estimated transaction value ~$98.93 million based on quarterly average prices Quarter-end position value decreased by $98.93 million, reflecting both trading activity and price movement Change represents a 9.3% decrease in reportable 13F assets under management Post-trade stake: zero shares, $0 value Position previously accounted for 9.0% of fund AUM, marking a significant liquidation of a top holding We're bullish on these 10 stocks › The Motley Fool 2026-02-23 12:09:41
US stocks close slightly higher, Infleqtion CEO discusses quantum computing company's IPO Asking for a Trend Host Josh Lipton looks back on the day's biggest trading themes on February 17, 2026. Infleqtion CEO Matt Kinsella comes on the program to discuss the quantum computing company's IPO. Yahoo Finance 2026-02-17 18:40:00
Is This Quantum Outperformer a New Threat to D-Wave? D-Wave Quantum Inc. NYSE: QBTS is off to a dynamite start to 2026 in many ways. The company began the year by closing on its $550-million acquisition of Quantum Circuits, a move that solidifies its growing presence in the traditional gate-model quantum tech space. MarketBeat 2026-02-17 07:07:02
Is Quantum Computing Stock Going to $0? Quantum Computing Inc. claims a unique approach to commercializing quantum technology faster than competitors, but its financials tell a different story. Despite a $2 billion market cap, the company generated less than $550,000 in revenue over the past 12 months while burning tens of millions annually. The Motley Fool 2026-02-15 13:15:00
Is Quantum Computing Stock a Buy, Hold, or Sell Amid TFLN Market Growth? Quantum Computing Inc. QUBT or QCi holds a meaningful and differentiated competitive advantage in the rapidly emerging photonics and quantum technology markets. At the core of this advantage is its U.S.-based thin-film lithium niobate (TFLN) photonic chip foundry in Tempe, AZ. Zacks Investment Research 2026-02-12 09:17:25
Quantum Computing (NASDAQ:QUBT) Trading Up 11.5% – What’s Next? Quantum Computing Inc. (NASDAQ: QUBT - Get Free Report)'s share price was up 11.5% during mid-day trading on Friday. The company traded as high as $8.49 and last traded at $8.7050. Approximately 2,095,039 shares changed hands during mid-day trading, a decline of 88% from the average daily volume of 16,781,521 shares. The stock had previously Defense World 2026-02-08 04:44:42
Prediction: 5 Quantum Computing Stocks That Will Be Worth More Than IonQ 5 Years From Now IonQ is a pure-play quantum computing stock, but its $13.7 billion valuation faces stiff competition from tech giants with deeper pockets. For instance, IBM operates the largest fleet of publicly accessible quantum computers. The Motley Fool 2026-02-04 05:57:00
The Worst Day for Silver in 46 Years Serves as a Warning for the Stock Market's 2 Hottest Trends: AI and Quantum Computing One of the key drivers behind the silver rally is also fueling the rise of artificial intelligence (AI) and the advent of quantum computing. Fool - Investing News 2026-02-03 03:51:00
Quantum Computing Inc. Completes Acquisition of Luminar Semiconductor, Inc. Transaction strengthens QCi's technology roadmap and advances QCi toward becoming a vertically integrated, domestic provider of photonics and quantum platforms HOBOKEN, N.J., Feb. 2, 2026 /PRNewswire/ -- Quantum Computing Inc. ("QCi" or the "Company") (Nasdaq: QUBT), an innovative, quantum optics and integrated photonics technology company, today announced the completion of acquiring Luminar Semiconductor, Inc. ("LSI"), a wholly owned subsidiary of Luminar Technologies, Inc. ("Luminar") (Nasdaq: LAZR), in an all-cash transaction valued at $110 million (the "Transaction"). PRNewsWire 2026-02-02 18:20:00
Better Quantum Stock: Rigetti Computing vs. Quantum Computing Which of these quantum computing plays has a brighter future? Fool - Investing News 2026-01-29 16:05:00
3 Unpleasant Truths Investors in IonQ, Rigetti Computing, D-Wave Quantum, and Quantum Computing Inc. Will Have to Face in 2026 As of mid-October 2025, pure-play stocks IonQ, Rigetti Computing, D-Wave Quantum, and Quantum Computing Inc. had soared by as much as 6,200% on a trailing 12-month basis. Although quantum computers offer intriguing real-world use cases, this technology is years away from solving practical problems more cost-effectively than classical computers. The Motley Fool 2026-01-28 03:51:00
Prediction: This Quantum Computing Stock Will Skyrocket in 2026 Unlike most quantum computing stocks, Quantum Computing underperformed the market last year. Sales still may have doubled in 2025, and sales could triple in 2026 -- and quintuple in 2027. The Motley Fool 2026-01-25 07:07:00
Here's Why I Wouldn't Touch Quantum Computing Stock With a 10-Foot Pole Even compared to its closest competitors, Quantum Computing stock is extremely expensive. The company has quadrupled its share count over the last three years to raise money. The Motley Fool 2026-01-25 03:33:00
Why QUBT Stock Is Outperforming the Industry Despite Near-Term Risks QUBT is outperforming peers after a $1.5B capital raise and on rising revenues, margins, and expanding photonic quantum manufacturing despite valuation risks. Zacks Investment Research 2026-01-23 11:55:41
Prediction: Quantum Computing, IonQ, Rigetti, and D-Wave Will Crash In 2026. Here's What You Should Buy Instead Quantum pure-plays have accrued massive market capitalizations despite minimal revenue. Despite industry hype, many experts suggest practical quantum computing applications remain a decade or more away. The Motley Fool 2026-01-23 10:42:00
QUBT's Key 2025 Milestones Continue to Gain Industry Attention Quantum Computing hit major milestones in 2025, including a NASA subcontract, its first sale to a U.S. bank, the opening of its photonic chip foundry, and inclusion in the Russell indexes. Zacks Investment Research 2026-01-22 10:17:01
QUBT vs. RGTI: Which Quantum Computing Stock Offers Greater Upside? RGTI has surged far more than QUBT, but manufacturing scale, contracts, and cash positions shape which quantum stock has more upside. Zacks Investment Research 2026-01-20 09:40:24
UBS Names Google As Quantum Computing 'Pioneer,' Flags Volatility Risks In Smaller Pure Plays UBS has identified several key quantum computing stocks that are leading the industry, with the technology offering "extraordinary potential." Benzinga 2026-01-20 04:54:25

SEC Filings

Type Filing Date Accepted Date Link
8-K 2026-02-03 2026-02-03 View Filing
SC 13G/A 2026-01-30 2026-01-30 View Filing
SC 13G/A 2026-01-21 2026-01-21 View Filing
4 2026-01-12 2026-01-12 View Filing
3 2026-01-12 2026-01-12 View Filing
8-K 2026-01-12 2026-01-12 View Filing
8-K 2025-12-17 2025-12-16 View Filing
8-K 2025-12-15 2025-12-15 View Filing
8-K 2025-11-14 2025-11-14 View Filing
10-Q 2025-11-14 2025-11-14 View Filing
SC 13G 2025-10-17 2025-10-17 View Filing
S-3ASR 2025-10-10 2025-10-09 View Filing
8-K 2025-10-08 2025-10-08 View Filing
SC 13G 2025-10-02 2025-10-02 View Filing
S-3ASR 2025-10-01 2025-10-01 View Filing
8-K 2025-09-24 2025-09-24 View Filing
4 2025-09-17 2025-09-17 View Filing
4 2025-09-17 2025-09-17 View Filing
4 2025-09-08 2025-09-08 View Filing
4 2025-09-05 2025-09-05 View Filing
4 2025-09-04 2025-09-04 View Filing
10-Q 2025-08-14 2025-08-14 View Filing
EFFECT 2025-08-05 2025-08-05 View Filing
SC 13G 2025-07-29 2025-07-29 View Filing
S-1 2025-07-29 2025-07-28 View Filing
4 2025-07-15 2025-07-15 View Filing
EFFECT 2025-07-15 2025-07-15 View Filing
424B3 2025-07-14 2025-07-14 View Filing
S-1 2025-07-03 2025-07-03 View Filing
3 2025-07-02 2025-07-02 View Filing
4 2025-07-02 2025-07-02 View Filing
8-K 2025-06-25 2025-06-24 View Filing
8-K 2025-06-20 2025-06-20 View Filing
4 2025-06-16 2025-06-16 View Filing
4 2025-06-11 2025-06-11 View Filing
4 2025-06-11 2025-06-11 View Filing
4 2025-06-05 2025-06-05 View Filing
3 2025-05-21 2025-05-21 View Filing
4 2025-05-20 2025-05-20 View Filing
4 2025-05-20 2025-05-20 View Filing
10-Q 2025-05-15 2025-05-15 View Filing
DEFA14A 2025-05-09 2025-05-08 View Filing
DEF 14A 2025-05-08 2025-05-08 View Filing
8-K 2025-05-08 2025-05-08 View Filing
4/A 2025-05-07 2025-05-07 View Filing
8-K 2025-04-16 2025-04-16 View Filing
4 2025-04-04 2025-04-04 View Filing
8-K 2025-04-04 2025-04-04 View Filing
3 2025-03-28 2025-03-28 View Filing
4 2025-03-28 2025-03-28 View Filing
8-K 2025-03-26 2025-03-26 View Filing
4 2025-03-25 2025-03-25 View Filing
S-8 2025-03-21 2025-03-21 View Filing
10-K 2025-03-20 2025-03-20 View Filing
4 2025-02-21 2025-02-21 View Filing
4 2025-02-21 2025-02-21 View Filing
4 2025-02-21 2025-02-21 View Filing
4 2025-02-21 2025-02-21 View Filing
4 2025-02-21 2025-02-21 View Filing
4 2025-02-21 2025-02-21 View Filing
4 2025-02-21 2025-02-21 View Filing
424B3 2025-02-04 2025-02-04 View Filing
EFFECT 2025-02-04 2025-02-04 View Filing
S-1 2025-01-22 2025-01-22 View Filing
8-K 2025-01-08 2025-01-08 View Filing
424B3 2025-01-07 2025-01-07 View Filing
EFFECT 2025-01-07 2025-01-07 View Filing
8-K 2024-12-31 2024-12-31 View Filing
S-1 2024-12-20 2024-12-20 View Filing
8-K 2024-12-12 2024-12-12 View Filing
424B5 2024-12-12 2024-12-12 View Filing
DEFA14A 2024-11-19 2024-11-19 View Filing
8-K 2024-11-18 2024-11-18 View Filing
424B5 2024-11-18 2024-11-18 View Filing
8-K 2024-11-15 2024-11-15 View Filing
10-Q 2024-11-06 2024-11-06 View Filing
DEFA14A 2024-11-04 2024-11-04 View Filing
DEF 14A 2024-11-01 2024-11-01 View Filing
PRE 14A 2024-10-09 2024-10-09 View Filing
4 2024-10-04 2024-10-04 View Filing
4 2024-10-04 2024-10-04 View Filing
4 2024-10-04 2024-10-04 View Filing
4 2024-10-04 2024-10-04 View Filing
10-Q 2024-10-02 2024-10-02 View Filing
10-Q 2024-10-02 2024-10-02 View Filing
8-K 2024-09-25 2024-09-25 View Filing
10-K/A 2024-09-11 2024-09-11 View Filing
8-K 2024-08-22 2024-08-22 View Filing
8-K 2024-08-12 2024-08-12 View Filing
8-K 2024-08-12 2024-08-12 View Filing
8-K 2024-08-01 2024-08-01 View Filing
8-K 2024-06-27 2024-06-27 View Filing
8-K 2024-06-11 2024-06-11 View Filing
8-K 2024-05-17 2024-05-17 View Filing
NT 10-Q 2024-05-15 2024-05-15 View Filing
4 2024-05-14 2024-05-14 View Filing
8-K 2024-05-08 2024-05-08 View Filing
3 2024-04-29 2024-04-29 View Filing
8-K 2024-04-25 2024-04-25 View Filing
4 2024-04-22 2024-04-22 View Filing

Algorithm Performance

Upgrade To Premium for Full Access
Algorithm Profit/Loss Profit Factor # Trades Sharpe Sortino Efficiency
Quantum Inspired Strategy 40.47% 0.95 15 0.63 0.62 55.95
Larry Williams PercentR Strategy 33.07% 1.28 19 0.56 0.4 48.55
Super Trend Strategy 16.41% 1.07 39 0.29 0.25 31.88
xxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxxx xxxxx
xxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx x xxxx xxxx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxx% xxxx xx xxxx xxxx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% x x xxxx xxxxxx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% x xx xxxx xxxxx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxx xxxxx
xxxxxxxxx xxxxxxx% xxxx xx xxxx xxx xxxx
xxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxx xxxxx
xxxx xxxxxxx% x xx xxxx xxx xxxx
xxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx x xxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxx xxxxx
xxxxxxxxxxxx xxxxxxx% xxxx x xxxx xxxx xxxx
xxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxx xxxx
xxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx x xxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxx xxxxxx% xxxx x xxxx xxxx xxxxx
xxxxxxxxxxxxxxxxxxxx xxxxxxx% x xx xxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx x xxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxxx xxxx
xxxxxxxxxxxxxxxx xxxxxxx% x x xxxx xxxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% x xx xxxx xxxx xxxx
xxxxxxxxxxxxxxxx xxxxxx% xxxx x xxxx xxx xxxx
xxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxx xx xxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxx xxxxxx% xxxx x xxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxx% xxxx x xxxx xxx xxxx
xxxxxxxxxxxxxx xxxxxx% xxxx xx xxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxx xxxxxx% xxx x xxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxx xxxxx% x xx xxxxx x xxxx
xxxxxxxxxxxxxxxxxxxx xxxxx% x xx xxxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxx x% x x x x xxxx
xxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x% x xx x x xxxxx
xxx x% x x x x xxxx
xxxxxxxxxxxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxxxxxxx x% x xx x x xxxxx
xxxxxxxxxxxxxxxxxxxxx x% x x x x xxxxx
xxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxx x% x x x x xxxxx
xxxxxxxxxxxxxxxxxxxxxxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxxxxxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxxxxxxx x% x x x x xxxx
xxxxxxxxxxxxxxxxxx x% x x x x xxxx
xxxxxxxxxxxxx x% x x xxxx xxxx xxxx
xxxxxxxxxxxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x% x x x x xxxx
xxxxxxxxx x% x xx x x xxxx
xxx x% x x x x xxxxx
xxxxxxxxxx x% x xx x x xxxx
xxxxxxxxxxxxxxxxxxxxxxx x% x xx x x xxxx
xxxxxxxxx xxxxxx% x xx xxxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxx xxxx xxxx
xxxxxxxxx xxxxxxx% xxxx x xxxxx xxxxx x
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% x xx xxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxx xxxxxxx% x xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% x xx xxxxx xxxxx xxxx
xxxx xxxxxxx% x xx xxxxx xxxx xxxx
xxxxxxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxxx xxxx
xxxxxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxx xxxxx% x xx xxxxx xxxxx xxxx
xxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxxx xxxx
xxxxxxxxx xxxxxxx% xxxx x xxxxx xxxxx xxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% x xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxx x
xxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxx xxxx
xxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxxx
xxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx x
xxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxxx
xxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxxx
xxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxx xx xxxxx xxxxx x
xxxxxxxxxxxxxxxxxxxx xxxxxxx% x xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% x xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxx xxxxx xxxx
xxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxx xxxxx xxxx
xxxxxxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxx xxxxxxxx% xxx xx xxxxx xxxxx xxxxx
xxxxxxxxxxxxx xxxxxxxx% xxx xx xxxxx xxxxx x
xxxxxxxxxxxxxxxxxxxxxxx xxxxxx% xxx x xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxx xxx
xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxxx xxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx% xxxx xx xxxx xxxxx xxxxx
xxxxxxxxxx xxxxxxxx% xxxx xx xxxxx xxxxx xxxxx
xxxxxxxxx xxxxxxxx% xxxx x xxxxx xxxx xxxxx