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Top Short Seller Reports of Q1 2026

Public companies faced Q1 short attacks questioning revenue quality, management credibility, and core growth assumptions.

Technical Analysis

Table of Contents

May 13, 2026

Several public companies were targeted by short seller reports in Q1 2026, triggering sharp stock moves as investors assessed allegations tied to accounting, earnings quality, financial reporting, customer demand, and business quality.

Short seller reports can move stocks quickly because they challenge a company’s investment narrative. The strongest reactions usually occur when reports question financial statements, revenue quality, management credibility, or core growth assumptions.

The most notable short seller reports this period involved ADMA Biologics, Carvana, Resideo Technologies, and Aviat Networks. Note: Aviat’s report was dated April 1, just outside Q1, but it is included here as a near-quarter-end short report because it fits the same cluster.

Why Short Seller Reports Matter

Short seller reports are not official findings. They are allegations made by investors who may profit if the stock declines.

That does not make them irrelevant. Some reports raise concerns that later lead to company responses, restatements, regulatory reviews, shareholder lawsuits, or sustained stock pressure.

Investors usually focus on whether the report:

  • introduces new evidence
  • targets core financial metrics
  • challenges management credibility
  • identifies regulatory or legal risk
  • exposes customer or revenue concentration
  • conflicts with company filings or prior statements 

The key is separating serious risk signals from aggressive opinion.

1. ADMA Biologics, Inc. (NASDAQ: ADMA)

Price: $8.63
Date: March 25, 2026
1-day impact: -15.00%

ADMA Biologics was targeted by Culper Research, which alleged financial misrepresentation and questioned the company’s growth narrative. Culper disclosed that it held a short position in ADMA.

ADMA Biologics is a commercial biopharmaceutical company focused on manufacturing, marketing, and developing specialty plasma-derived biologic products for immunocompromised patients and others at risk for infectious diseases.

Shares fell 15.00% after the short seller report, making ADMA one of the largest short-report reactions in this group. The allegations focused on demand for ASCENIV and whether ADMA had issued misleading information about its growth.

ADMA responded directly, calling the short report speculative and misleading. The company said demand for ASCENIV had increased over the prior two years based on distributor and customer data, and said the report contained “misleading, false and inaccurate statements.”

2. Carvana Co. (NYSE: CVNA)

Price: $69.48
Date: January 28, 2026
1-day impact: -14.20%

Carvana was targeted by Gotham City Research, which alleged the online used-car retailer overstated its 2023–2024 earnings by more than $1 billion and was more dependent on related parties tied to the Garcia family than previously disclosed.

Carvana is an online used-car retailer that sells, finances, and delivers vehicles through an ecommerce-focused platform.

Shares fell 14.20% after the report. Gotham alleged Carvana’s earnings depended on DriveTime debt issuance, “toxic” loans, related-party activity, and accounting irregularities. The report also claimed Carvana would need to delay its annual 10-K filing.

Carvana responded by calling the report “inaccurate and intentionally misleading.” The company said its related-party transactions were accurately disclosed in its financial statements and reconfirmed plans to release 2025 earnings on February 18.

3. Aviat Networks, Inc. (NASDAQ: AVNW)

Price: $14.85
Date: April 1, 2026
1-day impact: -13.00%

Aviat Networks was targeted by Glasshouse Research, which alleged the company was not truly generating the earnings it reported and was instead borrowing those earnings against its own balance sheet. Glasshouse disclosed that it was short Aviat stock.

Aviat Networks provides wireless transport and networking products, including microwave and millimeter-wave systems used by telecom carriers, private networks, utilities, and government customers.

Shares fell 13.00% after the report. Glasshouse alleged that Aviat was recognizing revenue before billing customers, struggling to collect cash, and delaying supplier payments, creating what it described as the “illusion of growth and profitability.” The report also raised concerns about unbilled receivables and revenue recognition tied to estimates rather than completed customer payments.

4. Resideo Technologies, Inc. (NYSE: REZI)

Price: $31.29
Date: January 27, 2026
1-day impact: -4.14%

Resideo Technologies was targeted by Spruce Point Capital Management, which released a report titled “Red Alert, Where There’s Smoke, There’s Fire.” Spruce Point issued a strong sell opinion and estimated potential long-term downside of 25% to 50%.

Resideo provides residential and commercial building technology products, including security, comfort, smart home, fire safety, and distribution solutions.

The report alleged problems tied to connected-customer growth, R&D investment, capex forecasting, ERP systems, acquisition reporting, organic growth, and financial reporting. Spruce Point also criticized Resideo’s acquisition strategy, including First Alert and Snap One, and alleged that financial reporting and integration issues may be masking business weakness.

Shares fell 4.14% on a 1-day impact basis. The current change listed was much steeper at -14.70%, but the measured 1-day impact was smaller than ADMA, Carvana, and Aviat.


What Separated the Biggest Stock Moves

Not every short seller report creates the same market reaction.

The biggest declines usually occur when:

  • allegations are specific and evidence-based
  • the report targets accounting or revenue recognition
  • the company has high valuation or prior hype
  • the stock already had weak credibility
  • the company response is delayed or vague
  • regulators or auditors become involved
  • the report challenges the core business model 

ADMA, Carvana, and Aviat saw the largest immediate reactions because the reports questioned core financial credibility. ADMA’s report challenged growth claims, Carvana’s report targeted earnings quality and related-party exposure, and Aviat’s report focused on revenue recognition and cash collection.

Why These Events Are High-Risk Catalysts

Short seller reports can create fast downside, but they are not clean signals.

Risks include:

  • ‍allegations may be wrong or incomplete
  • short sellers have financial incentives
  • stocks can rebound sharply after rebuttals
  • legal threats can create confusion
  • high short interest can lead to squeezes

The best use is not blind selling. It is rapid risk review.

The Bigger Picture

Short seller reports can expose risks that markets were ignoring, but they can also create temporary volatility without lasting impact.

The strongest signals occur when allegations are specific, supported by evidence, and followed by company disclosures, regulatory scrutiny, or deteriorating fundamentals.

Platforms like LevelFields track earnings beats, activist investor stake, layoffs, strategic events, dividends, helping investors identify when negative research has historically led to meaningful stock moves, reversals, or longer-term downside.

Avi Baron
Avi Baron is a financial analyst at LevelFields AI, specializing in event-driven investing and corporate action research.

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