Rtw Investments 13F: Adds $58M to iRhythm (IRTC) Stake

RTW Investments made a notable move in its latest 13F filing, boosting its stake in iRhythm Holdings, Inc. (NasdaqGS:IRTC) by 41%. The investment firm added 486,510 shares, bringing its total holdings to 1,668,500 shares valued at approximately $189.6 million as of the filing date.

What Changed in RTW Investments' iRhythm Holdings Position

RTW Investments' recent 13F filing shows a significant increase in its iRhythm Holdings position. Previously holding 1,181,990 shares, the firm added 486,510 shares, marking a 41% increase. This brings its total to 1,668,500 shares, valued at about $189.6 million.

Other Institutional Activity in iRhythm Holdings

Other institutional investors have also been active in iRhythm Holdings. Tudor Investment Corp added a substantial 20 million shares, ending with a total of 20 million shares valued at $21.97 million. BlackRock, Inc. trimmed its position by 72,484 shares, holding 2,741,505 shares worth around $323.6 million. Vanguard Portfolio Management LLC increased its holdings by 1,796,372 shares, reaching a total of 1,796,372 shares valued at $212 million. Millennium Management LLC also boosted its stake significantly, adding 781,638 shares to hold 1,608,014 shares worth $189.8 million. Artisan Partners Limited Partnership slightly reduced its position by 61,085 shares, bringing its total to 1,450,907 shares valued at $171.2 million.

iRhythm Holdings, Inc. Stock Up 8.8%

Shares of iRhythm Holdings, Inc. (NasdaqGS:IRTC) recently traded near $113.65. The company has a market capitalization of approximately $3.73 billion, with a forward P/E ratio of 108.1 and a beta of 1.281. The stock's 52-week range is between $101.75 and $212.00, while its 50-day and 200-day moving averages are $117.21 and $151.76, respectively. The firm maintains a current ratio of 5.166 and a quick ratio of 4.785, though it has a high debt-to-equity ratio of 452.386.

Recent Earnings

In its latest earnings report, iRhythm Holdings posted revenue of $787.9 million, reflecting a growth rate of 25.7%. Despite this, the company reported a net margin of -3.53% and a return on equity of -22.42%. The next earnings release is scheduled for April 30, 2026.

Insider Buying and Selling at iRhythm Holdings, Inc.

Recent insider transactions at iRhythm Holdings include both buying and selling activities. On June 2, 2026, Chief Accounting Officer Marc Wade Rosenbaum sold 729 shares at an average price of $108.19. On the same day, EVP and Chief Risk Officer Sumi Shrishrimal sold 1,716 shares at the same price. Earlier, on May 29, 2026, several insiders, including CEO Quentin Blackford, bought shares at $96.82, with purchases ranging from 133 to 178 shares.

Analysts Set New Price Targets

Analysts remain bullish on iRhythm Holdings, with multiple firms maintaining their buy ratings. On June 10, 2026, BTIG reiterated its buy rating with a price target of $185. Canaccord Genuity maintained a buy rating on June 1, 2026, with a target of $152. B of A Securities set a target of $180 on May 18, 2026. Overall, the analyst consensus is a strong buy, with a mean price target of $178.93 based on 14 opinions.

About iRhythm Holdings

iRhythm Holdings, Inc. is a healthcare company based in San Francisco, California. It specializes in digital healthcare solutions focusing on device-based technology for ambulatory cardiac monitoring services to diagnose arrhythmias. The company's Zio services include long-term and short-term continuous monitoring and mobile cardiac telemetry. Under CEO Quentin Blackford, iRhythm employs around 2,400 people.

Bottom Line

RTW Investments' decision to significantly increase its stake in iRhythm Holdings underscores the firm's confidence in the company's future prospects. Investors often track these filings for insights into institutional sentiment, keeping in mind that 13F filings reflect past positions. iRhythm's performance, market position, and analyst ratings suggest continued interest in its stock.