Weekly Investment Analysts’ Ratings Changes for Quantum-Si (QSI)

Quantum-Si (NASDAQ: QSI) recently received a number of ratings updates from brokerages and research firms:

• 9/29/2026 – Quantum-Si had its “buy” rating reaffirmed by HC Wainwright. They now have a $4.00 price target on the stock.
• 9/24/2026 – Quantum-Si was upgraded by Weiss Ratings from “sell (e+)” to “sell (d-)”.
• 9/12/2026 – Quantum-Si was upgraded by Wall Street Zen from “sell” to “hold”.
• 9/9/2026 – Quantum-Si was downgraded by Weiss Ratings from “sell (d-)” to “sell (e+)”.
• 8/25/2026 – Quantum-Si was upgraded by Weiss Ratings from “sell (e+)” to “sell (d-)”.
• 8/14/2026 – Quantum-Si had its “buy” rating reaffirmed by Alliance Global Partners.
• 8/11/2026 – Quantum-Si was downgraded by Weiss Ratings from “sell (d-)” to “sell (e+)”.

Quantum-Si Incorporated (NASDAQ:QSI) is a life sciences technology company focused on advancing proteomics, the study of proteins and their roles in biological systems. The company develops tools intended to help researchers identify and analyze proteins at the single-molecule level, supporting applications in drug discovery, translational research and precision medicine.

Its primary offering is the Platinum platform, which combines an automated instrument, proprietary sequencing technology, consumables and software for protein analysis.