RTW Investments RDNT Position
ActiveRTW Investments increased their position in RadNet, Inc. (RDNT) in Q4 2025, holding $281.0M worth of shares across 3,938,500 shares.
The position was first reported in Q4 2023 and has been tracked across 9 quarterly 13F filings.
1 other tracked fund also holds RDNT.
Short interest stands at 12.6% of float with 9.4 days to cover, indicating significant bearish positioning against RTW Investments's long thesis.
About RadNet, Inc.
RadNet, Inc., together with its subsidiaries, provides outpatient diagnostic imaging services in the United States. Its services include magnetic resonance imaging, computed tomography, positron emission tomography, nuclear medicine, mammography, ultrasound, diagnostic radiology, fluoroscopy, and other related procedures, as well as multi-modality imaging services. The company also develops and sells computerized systems for the diagnostic imaging industry, including picture archiving communications systems and related services; and develops and deploys AI suites to enhance radiologist interpretation of images in the field of mammography, as well as AI solutions for lung and prostate cancer. As of December 31, 2021, it owned and managed 347 centers in Arizona, California, Delaware, Florida, Maryland, New Jersey, and New York. The company was founded in 1981 and is headquartered in Los Angeles, California.
Full company profile →Short Interest
12.6%
9.4 days to cover
RTW Investments RDNT Position History
| Quarter | Action | Shares | Change | Value |
|---|---|---|---|---|
| Q4 2025 | Increased | 3,938,500 | +1,122,956 | $281.0M |
| Q3 2025 | Increased | 2,815,544 | +125,200 | $214.6M |
| Q2 2025 | Increased | 2,690,344 | +372,762 | $153.1M |
| Q1 2025 | Increased | 2,317,582 | +339,000 | $115.2M |
| Q4 2024 | Increased | 1,978,582 | +169,978 | $138.2M |
| Q3 2024 | Decreased | 1,808,604 | -47,406 | $125.5M |
| Q2 2024 | Increased | 1,856,010 | +155,460 | $109.4M |
| Q1 2024 | Increased | 1,700,550 | +1,036,948 | $82.7M |
| Q4 2023 | New | 663,602 | +663,602 | $23.1M |
Frequently Asked Questions
Does RTW Investments own RDNT?
Yes. As of Q4 2025, RTW Investments holds 3,938,500 shares of RadNet, Inc. (RDNT) valued at $281.0M. This data comes from their SEC 13F filing.
How many hedge funds own RDNT?
2 specialist biotech hedge funds currently hold RDNT, including Deerfield Management. When 3 or more specialist funds hold the same stock, BiotechEdge flags it as a convergence signal.
When did RTW Investments first buy RDNT?
RTW Investments's position in RDNT was first reported in Q4 2023. 13F filings are reported with a 45-day delay, so the actual purchase may have occurred earlier in the quarter.
Is RTW Investments's RDNT position increasing or decreasing?
RTW Investments increased their RDNT position in the most recent quarter, adding 1,122,956 shares.
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