Overview
Insider transaction filings disclosed on Tuesday reveal several material purchases and sales by corporate executives, directors and significant shareholders across multiple sectors. The filings, submitted via Form 4s with the Securities and Exchange Commission, show concentrated buying at companies including Sonos Inc, Reddit and Oncology Institute, while directors and senior officers at Ironwood Pharmaceuticals, Vicor, Century Aluminum, Bloom Energy and Curbline Properties completed large-scale sales.
Top buys
Sonos Inc (SONO) - Coliseum Capital Management and affiliates: $3.07 million
Coliseum Capital Management and affiliated entities, including individuals named Christopher S. Shackelton and Adam Gray, expanded their stake in Sonos Inc through several purchases totaling $3.07 million. The Form 4 filing shows that on March 13, 2026, the entities purchased 90,000 shares at $13.20 per share. On March 16, 2026, an additional 13,920 shares were bought at $13.25 per share. A further 125,000 shares were acquired on March 17, 2026, at a weighted average price with reported prices in the range of $13.44 to $13.69. Overall, the execution prices reported across these transactions ranged from $13.20 to $13.57.
Reddit (RDDT) - Director Sarah E. Farrell: $1.38 million indirect purchase
Sarah E. Farrell, a director of Reddit, indirectly purchased 10,500 shares of the company’s Class A Common Stock on March 13, 2026, at a price of $132.26 per share, equating to a transaction value of $1.38 million. The reported price range for these purchases spanned $131.83 to $132.50. The filing notes that following the transaction Farrell indirectly holds 61,000 shares through Waygrove Partnership LP and directly owns 7,899 shares of Reddit Class A Common Stock.
The filing contextualizes this purchase against recent share price movement: Reddit shares have declined 47% over the past six months, despite the company remaining profitable over the last twelve months. The filing references an analysis that indicates a share price of $144.33 and highlights the availability of additional ProTips for investors tracking the ticker RDDT.
Oncology Institute, Inc. (TOI) - Jorey Chernett (10% owner): $1,225,100
Jorey Chernett, identified as a ten percent owner of Oncology Institute, Inc., purchased common stock in several transactions on separate dates totaling $1,225,100. According to the Form 4, the purchases occurred over three days. On March 13, 2026, Chernett acquired 263,000 shares at $2.92 per share; the reported purchase prices on that date ranged from $2.77 to $3.34. On March 16, 2026, Chernett bought 60,985 shares at $3.29 per share in transactions with prices between $3.25 and $3.43. Finally, on March 17, 2026, Chernett purchased 75,000 shares at $3.42 per share, with transaction prices ranging from $3.39 to $3.49. The filings note that TOI shares have appreciated 412% over the past year and are currently trading at $3.59.
SLR Investment Corp (SLRC) - Director Michael S. Gross: $493,103
Michael S. Gross, a director at SLR Investment Corp, reported two purchases of common stock on March 13 and March 16, 2026, totaling $493,103. On March 13, Gross acquired 25,000 shares at a weighted average price of $13.9143, with individual prices in the range of $13.86 to $13.97 per share. On March 16, he purchased 10,452 shares at a weighted average price of $13.8965, reflecting prices from $13.85 to $13.90 per share. The filing observes that SLRC was trading near its 52-week low of $13.64 at the time, with a current quoted price of $14.30, and reports an attractive dividend yield of 11.47% along with a 17-year consecutive dividend payment record.
CBIZ, Inc. (CBZ) - Senior VP and CFO Brad S. Lakhia: $331,719
Brad S. Lakhia, Senior Vice President and Chief Financial Officer of CBIZ, Inc., purchased 12,775 shares of CBIZ common stock on March 13, 2026, at a price of $25.9663 per share, for a total transaction value of $331,719. The filing highlights that the company’s shares were trading near a 52-week low of $25.45, amid a year-to-date decline of 63% over the prior 12 months. After the purchase, Lakhia is reported to directly own 148,479.9545 shares of the company, which includes 1,154.9545 shares obtained through the company’s 2007 Employee Stock Purchase Plan.
Top sells
Ironwood Pharmaceuticals Inc (IRWD) - Director Alexander J. Denner: $20.5 million
Alexander J. Denner, a director at Ironwood Pharmaceuticals, reported selling $20.5 million in Class A Common Stock on March 17, 2026. The Form 4 indicates that Denner sold 6,725,000 shares at $3.05 per share and an additional 5,800 shares at $3.31 per share. These sales were executed in two tranches with reported prices ranging from $3.05 to $3.31. The filing notes that the stock experienced recent volatility, having declined nearly 12% over the past week, while remaining up 124% over the prior 12 months.
Vicor Corp (VICR) - Chairman and CEO Patrizio Vinciarelli: $9.23 million
Patrizio Vinciarelli, Chairman and Chief Executive Officer of Vicor Corp, sold 47,922 shares on March 16, 2026, under a pre-arranged Rule 10b5-1 trading plan, generating total proceeds of $9.23 million. The transactions were reported at weighted average prices between $178.06 and $189.7525 per share. The filing records that the stock has since moved to $196.67, representing a gain of 234% over the past year and a 69% year-to-date increase. Vicor’s market capitalization and price-earnings ratio are reported as $8.72 billion and 73.18, respectively.
Century Aluminum Co (CENX) - President and CEO Jesse E. Gary: $8,320,500
Jesse E. Gary, President and Chief Executive Officer of Century Aluminum Co, sold 150,000 shares of common stock on March 16, 2026, at a weighted average price of $55.47, for aggregate proceeds of $8,320,500. The reported price range for those sales was $54.08 to $56.80. The filing indicates that CENX was trading near a 52-week high of $59.12 following a 176% return over the prior year. The sale was executed pursuant to a pre-arranged Rule 10b5-1 trading plan, which the filing states is now complete. Post-transaction ownership for Gary is reported as 277,227 shares held directly, including unvested restricted stock units, and an indirect holding of 142,580 shares held in trust.
Bloom Energy Corp (BE) - Chief Legal Officer and Corporate Secretary Shawn Marie Soderberg: approximately $6.5 million
Shawn Marie Soderberg, Chief Legal Officer and Corporate Secretary at Bloom Energy, disposed of 42,881 shares of Class A Common Stock between March 16 and March 17, 2026, producing approximately $6.5 million in proceeds. The sales occurred at prices ranging from $149.60 to $161.37 per share. On March 16, Soderberg sold 13,901 shares at a weighted average price of $152.59, totaling $2,121,153, and later that day sold 15,906 shares at a weighted average price of $154.82, totaling $2,462,566. On March 17, she sold 13,074 shares at a weighted average price of $153.44, yielding $2,006,074. The filing notes that Bloom Energy shares were trading at $160.05, up 572% over the past 12 months, and positions the company as having a market capitalization of $43.1 billion. The filing also reports that the stock appeared overvalued relative to its Fair Value in the referenced analysis.
Curbline Properties Corp. (CURB) - President and CEO David R. Lukes: approximately $3.3 million
David R. Lukes, President and Chief Executive Officer of Curbline Properties Corp., sold a total of 123,412 shares on March 13 and March 16, 2026, realizing roughly $3.3 million in proceeds. The transactions were executed at prices reported between $26.799 and $26.829. Specifically, the filing lists a sale of 39,749 shares on March 13 and a sale of 83,663 shares on March 16. The filing highlights that the stock traded near its 52-week high of $28.64 and had returned 21% over the prior six months. The analysis cited in the filing indicates the company’s shares appeared overvalued compared with Fair Value metrics.
Context and considerations
These filings offer a snapshot of how insiders and significant holders are adjusting their positions across a range of sectors, including consumer electronics, social media, healthcare and biotechnology, specialty finance and business services, semiconductors and power electronics, base metals and mining-related materials, energy technology, and real estate. The filings contain precise transaction dates, share counts, price points and ranges, as reported by the individuals and entities in the SEC disclosures.
It is important to note the limitations of using insider activity as a sole indicator of future stock performance. While purchases by insiders can reflect confidence in a company’s prospects, and sales might be viewed as the opposite, SEC filings do not disclose the personal financial reasons that may motivate executives and major shareholders. Many potential explanations for sales - including portfolio rebalancing, tax planning, or other personal financial needs - are not provided in Form 4s.
Investors should treat insider transaction filings as one input among many when assessing securities. The filings provide transaction-level detail that can be incorporated into broader valuation, liquidity and risk assessments, but they do not by themselves confirm changes in company fundamentals or guarantee future price moves.
What this means for market watchers
- Active buying by investment managers and directors in companies trading near recent lows may attract attention from value-oriented investors who follow insider activity.
- Large sales by directors or executives, particularly when conducted under pre-arranged plans, are common and may reflect pre-planned liquidity events rather than a signal of deteriorating fundamentals.
- Reported price ranges, weighted average prices and the timing of transactions are key details that allow investors and analysts to place the filings into the context of recent market moves and company-specific developments.
All transaction details noted above derive from the respective Form 4 filings and the figures contained therein. Readers and market participants should consult the official SEC filings for the full, original disclosure text and consider these transactions as one element of a comprehensive investment process.