RadNet, Inc.
MX ˙ BMV ˙ US7504911022
SecurityMX:RDNT / RadNet, Inc.
InstitutionPortolan Capital Management, LLC
Latest Disclosed Ownership23,728 shares
Latest Disclosed Value $ 1,326,158
Portolan Capital Management, LLC reports 79.81% decrease in ownership of RDNT / RadNet, Inc.

On May 15, 2026 - Portolan Capital Management, LLC filed a 13F-HR form disclosing ownership of 23,728 shares of RadNet, Inc. (MX:RDNT) valued at $1,326,158 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 117,506 shares of RadNet, Inc.. This represents a change in shares of -79.81% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F RADNET COM 750491102 23,728 -93,778 -79.81 1,326 -84.18 0.0706
2026-02-17 2025-12-31 13F RADNET COM 750491102 117,506 -109,163 -48.16 8,384 -51.46 0.4492
2025-11-13 2025-09-30 13F RADNET COM 750491102 226,669 -114,686 -33.60 17,274 -11.08 0.9348
2025-08-13 2025-06-30 13F RADNET COM 750491102 341,355 -137,051 -28.65 19,427 -18.33 1.2180
2025-05-15 2025-03-31 13F RADNET COM 750491102 478,406 54,066 12.74 23,786 -19.74 1.8078
2025-02-13 2024-12-31 13F RADNET COM 750491102 424,340 -67,018 -13.64 29,636 -13.08 1.9933
2024-11-14 2024-09-30 13F RADNET COM 750491102 491,358 390,011 384.83 34,095 471.01 2.4716
2024-08-14 2024-06-30 13F RADNET COM 750491102 101,347 7,366 7.84 5,971 30.57 0.4917
2024-05-15 2024-03-31 13F RADNET COM 750491102 93,981 -48,540 -34.06 4,573 -7.71 0.3483
2024-02-14 2023-12-31 13F RADNET COM 750491102 142,521 -74,222 -34.24 4,955 -18.89 0.4333
2023-11-14 2023-09-30 13F RADNET COM 750491102 216,743 -86,806 -28.60 6,110 -38.30 0.5710
2023-08-14 2023-06-30 13F RADNET COM 750491102 303,549 303,549 9,902 0.8767
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.