Quantum-Si Incorporated Class A (QSI)

NASDAQ:
QSI
| Latest update: Nov 3, 2025, 7:44 PM

Stock events for Quantum-Si, Inc. (QSI)

Quantum-Si's stock (QSI) has experienced volatility in the past six months. The stock price increased significantly over the last 12 months but had a negative year-to-date return. Key events include Q2 2025 earnings report with revenue below estimates, Q1 2025 earnings report with revenue increase, a $50 million capital raise, insider selling, varied analyst ratings, and the influence of market sentiment and "quantum hype."

Demand Seasonality affecting Quantum-Si, Inc.’s stock price

Explicit information regarding strict seasonal demand patterns for Quantum-Si's products and services is not detailed in the available data. However, several factors have been identified that influence demand and revenue trends. The company's revenue can be variable in the near term due to the initial stages of commercialization and the mix of instrument versus consumable sales. NIH funding headwinds and related market uncertainties have impacted demand, particularly in the U.S. academic market. To mitigate such impacts and drive growth, Quantum-Si is strategically focusing on expanding its customer base in the biopharma segment and accelerating its international expansion.

Overview of Quantum-Si, Inc.’s business

Quantum-Si, Inc. is a biotechnology company focused on revolutionizing proteomics with its semiconductor chip-based technology. Founded in 2013 and headquartered in Branford, Connecticut, it operates in the life sciences sector, specifically in biotechnology and medical devices, with a focus on next-generation protein sequencing (NGPS). Its major products include the Platinum® NGPS instrument, the Platinum Pro NGPS instrument, Platinum Analysis Software, and a range of consumables. The company is also developing the Proteus™ platform, an advanced sequencing product.

QSI’s Geographic footprint

Quantum-Si's headquarters are in Branford, Connecticut, USA. The company has expanded internationally with an Avantor distribution agreement in North America and a network of 15 partners across Western Europe, Eastern Europe, Asia, the Middle East, Africa, South America, and the South Pacific. Approximately 60% of its installed instrument base is located outside the United States.

QSI Corporate Image Assessment

Quantum-Si is in the early stages of commercialization and is building its brand through trade shows, conferences, and webinars. Customer feedback for the version 2 sequencing kit has been positive. The company's reputation has been affected by "quantum hype," with some investors mistakenly associating it with quantum computing, leading to stock price fluctuations.

Ownership

The ownership structure of Quantum-Si (QSI) stock includes institutional, insider, and retail investors. Approximately 31.04% of the company's stock is owned by institutional investors. Individual investors hold a substantial 45.84% stake. Insiders own approximately 23.12% of the company's stock, with Jonathan M. Rothberg being the largest individual shareholder.

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Price Chart

$2.15

39.61%
(1 month)

Top Shareholders

BlackRock, Inc.
6.70%
ARK Invest LLC
4.92%
Sumitomo Mitsui Trust Group, Inc.
3.22%
MLM Trust B
2.34%
Geode Holdings Trust
2.13%
State Street Corp.
1.70%
Northern Trust Corp.
1.41%
TIAA Board of Governors
0.70%
Bodel, Inc.
0.59%
The Goldman Sachs Group, Inc.
0.55%
UBS Group AG
0.49%
Fosun International Holdings Ltd.
0.46%
Two Sigma Investments LP
0.35%
GFH CSEVA LLC
0.34%
Bank of America Corp.
0.29%
Royal Bank of Canada
0.28%
The Charles Schwab Corp.
0.27%
The Bank of New York Mellon Corp.
0.22%
Knollwood Investment Advisory LLC
0.19%
Morgan Stanley
0.18%

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FAQ

What is the current stock price of Quantum-Si, Inc.?

As of the latest update, Quantum-Si, Inc.'s stock is trading at $2.15 per share.

What’s happening with Quantum-Si, Inc. stock today?

Today, Quantum-Si, Inc. stock is up by 39.61%, possibly due to news.

What is the market sentiment around Quantum-Si, Inc. stock?

Current sentiment around Quantum-Si, Inc. stock is negative, based on recent news, trading volume, and analyst opinions.

Is Quantum-Si, Inc.'s stock price growing?

Over the past month, Quantum-Si, Inc.'s stock price has increased by 39.61%.

How can I buy Quantum-Si, Inc. stock?

You can buy Quantum-Si, Inc. stock through any brokerage platform, such as e.g., Robinhood, Fidelity, E*TRADE, by searching for the ticker symbol QSI

Who are the major shareholders of Quantum-Si, Inc. stock?

Major shareholders of Quantum-Si, Inc. include institutions such as BlackRock, Inc. (6.70%), ARK Invest LLC (4.92%), Sumitomo Mitsui Trust Group, Inc. (3.22%) ... , according to the latest filings.