Here is a detailed review of the most material insider trading activity disclosed Wednesday for U.S.-listed equities. The filings include both substantial insider purchases at insurance and regional bank stocks and major sell transactions by corporate leaders and large shareholders in technology, mining, energy and financial firms. Each report lists transaction dates, share counts, prices and, where available in the filings, updated direct holdings.
Largest insider purchases by dollar value
Donegal Mutual Insurance Co made the single largest insider buy by dollar amount, acquiring $369,198 of Donegal Group Inc (NASDAQ:DGICA) Class A Common Stock in two separate trades. The filings show the company - which is identified as both a 10% owner and a director - purchased 10,000 shares on August 31, 2026, and then 9,257 shares on September 1, 2026. The purchase prices ranged between $19.1675 and $19.1765 per share. After these purchases, Donegal Mutual Insurance Co is reported to directly hold 14,272,971 shares of Class A Common Stock and 4,751,974 shares of Class B Common Stock.
The filing notes the stock is currently trading at $19.17. The disclosure includes an InvestingPro valuation note stating the shares have gained nearly 11% in the last six months, that the security appears undervalued on InvestingPro's assessment, and that the company offers a 4% dividend yield with 25 consecutive years of dividend increases.
Kevin M. O'Connor, President of Hanover Bancorp, Inc. (NASDAQ:HNVR), reported a direct purchase of 10,000 shares of Hanover common stock on July 30, 2026. The transaction was executed at $26.88 per share for a total of $268,800, and the filing shows that Mr. O'Connor now beneficially owns 12,300 shares of Hanover Bancorp common stock. The company stock is trading near a 52-week high of $27.89 and has returned about 30% over the prior six months. The filing includes InvestingPro commentary noting the stock appears overvalued relative to its Fair Value estimate and references six additional InvestingPro tips on HNVR.
Kevin S. Blair, Chief Executive Officer and a Director of Pinnacle Financial Partners, Inc. (PNFP), increased his direct holding on September 1, 2026, acquiring 2,565 shares at $97.48 per share for a total of $250,036. The filing shows Mr. Blair now directly holds 152,397 shares of Pinnacle Financial Partners common stock. The disclosure notes the company, with approximately $14.6 billion in assets, is trading with a price-to-earnings ratio of 14.27. InvestingPro commentary in the filing reports PNFP appears undervalued against its Fair Value estimate, and that the company has paid dividends for 14 consecutive years with a current yield of 2.06%.
United States Antimony Corp also recorded notable insider buying. Joseph A. Carrabba, a director at United States Antimony Corp (UAMY), purchased 21,300 shares on September 1, 2026, at $4.72 per share, for a total consideration of $100,536. The filing indicates the shares were bought when the company's stock was trading near $4.68. The disclosure reports the stock has declined 56% over the prior six months and sits roughly 76% below its 52-week high of $19.71. InvestingPro commentary included in the filing characterizes the stock as slightly undervalued at current levels and highlights that the company holds more cash than debt, as noted in its Pro Research Report. After the transaction, Mr. Carrabba directly holds 198,401 shares of United States Antimony common stock.
Another insider at United States Antimony Corp, Lloyd Bardswich - Director, Executive Vice President and Chief Mining Engineer - reported purchasing 20,000 shares on September 1, 2026, at $4.635 per share for a total of $92,700. The filing shows Mr. Bardswich now directly holds 932,881 shares. The disclosure contrasts the purchase price with a subsequently reported market price of $5.22 for the stock, representing a gain relative to Mr. Bardswich's purchase price in the filings. The form also notes the stock has declined 56% over the past six months and that InvestingPro currently rates UAMY as overvalued relative to its Fair Value analysis, while offering 11 additional ProTips for prospective investors.
Largest insider sales disclosed
Aart de Geus, Executive Chair of Synopsys Inc (NASDAQ:SNPS), reported a series of sales totaling approximately $21.38 million of Synopsys common stock across transactions on August 31 and September 1, 2026. Those sales followed the acquisition of shares through option exercises and participation in an employee stock purchase plan, which together accounted for about $6.75 million of newly acquired shares that were then sold. The filings provide transaction detail: on August 31, 2026, Mr. de Geus sold 25,000 shares at a weighted average price of $441.7646 per share, with sales prices range-reported from $435.88 to $445.70. The same day, he exercised 25,000 non-qualified stock options at an exercise price of $135.88 per share and acquired an additional 22 shares under the Synopsys Employee Stock Purchase Plan at $360.961 per share. The current market price in the filing is listed at $412.76, with the stock down 11.69% year-to-date, and InvestingPro's commentary within the filing still categorizes the stock as undervalued at current levels.
Bruno Sousa Mauad, a director of Aura Minerals Inc. (NASDAQ:AUGO), reported substantial changes to his beneficial ownership on August 31, 2026, with activity primarily occurring through indirect holdings by Kapitalo Investimentos and resulting in both dispositions and acquisitions tied to Brazilian Depositary Receipt conversions. The most prominent transaction disclosed was the sale of 127,500 common shares at $81.20 per share, totaling $10,353,000. The filing lists current trading at $84.60 and notes the stock's 184% return over the prior year with a recent one-week pullback of roughly 5%.
Control Empresarial de Capitales S.A. de C.V., identified as a 10% owner and director of PBF Energy Inc. (PBF), disclosed the sale of 120,000 Class A Common Shares on August 17, 2026, for aggregate proceeds of approximately $8,974,308. The sales were executed at a weighted average price of $74.7859 per share, with individual transaction prices ranging between $74.40 and $75.20 per share.
Workers United, reported as a 10% owner and director of Amalgamated Financial Corp. (NASDAQ:AMAL), disclosed the sale of common stock totaling about $6.38 million over a sequence of transactions spanning late August and early September 2026. The filings detail three blocks: on August 31, 2026, Workers United sold 73,535 shares at a weighted average price of $48.1194, with individual trades from $48.10 to $48.25; on September 1, 2026, an additional 15,000 shares were sold at a weighted average price of $47.2843, with trade prices between $47.06 and $47.54; and on September 2, 2026, 44,244 shares were sold at a weighted average of $48.1891, with prices ranging from $47.85 to $48.30. The filing notes AMAL shares trade at $48.14, with a market capitalization of $1.44 billion, and that the stock has returned 71% over the last year and 52% year-to-date.
Molly R. Benson, Chief Legal Officer and Corporate Secretary at Marathon Petroleum Corp (NYSE:MPC), sold 17,196 shares of Marathon Petroleum common stock on August 17, 2026, for total proceeds of $6,165,969. The filing states the sales were executed under a pre-arranged Rule 10b5-1 trading plan adopted by Ms. Benson on May 15, 2026. The reported sale price was $358.57 per share. The filing further reports that the stock has since risen to $387 and is trading near its 52-week high of $391.98, with a year-to-date return around 140%. InvestingPro commentary included in the filing lists the stock as appearing fairly valued at current levels.
Context and closing observations
The disclosed filings provide precise transaction detail - share counts, dates, prices and subsequent direct holdings - that can supplement an investor's view of insider positioning. Several purchases occurred at smaller or micro-cap issuers and involved directors or executives increasing direct holdings, while the largest dollar-value moves among the filings were sales executed by executives and large shareholders across technology, mining, energy and financial companies. Where InvestingPro commentary was included in the filings, the notes addressed recent performance, valuation characterizations and dividend histories.
These disclosures update the public record of who holds what stake in these companies and at what prices those holdings changed. Investors monitoring insider activity can use this information alongside other financial statement and market data to assess alignment between management, major shareholders and market pricing. The filings themselves disclose the transactions and the resulting direct holdings; they do not, and the disclosures do not, provide definitive statements about future performance.
Below are the filings and valuation comment highlights referenced within the disclosures where available:
- Donegal Group Inc (DGICA) - purchases totaling $369,198; reported $19.17 market price; InvestingPro describes shares as undervalued and notes a 4% dividend yield and 25 years of dividend increases.
- Hanover Bancorp, Inc. (HNVR) - insider purchase of 10,000 shares at $26.88; stock near 52-week high; InvestingPro flagged potential overvaluation relative to Fair Value.
- Pinnacle Financial Partners (PNFP) - CEO acquired 2,565 shares at $97.48; investing commentary indicates undervaluation by Fair Value and a 2.06% dividend yield with 14 consecutive years of payments.
- United States Antimony Corp (UAMY) - two insiders purchased shares; filings note recent heavy drawdown in market price and mixed InvestingPro valuation commentary.
- Synopsys Inc (SNPS) - Executive Chair sold roughly $21.38 million of stock across filings; filings also record option exercises and ESPP purchases on the same day.
- Aura Minerals Inc. (AUGO) - director reported major disposition of 127,500 shares for $10,353,000 amid strong one-year performance.
- PBF Energy Inc. (PBF) - 10% owner sold 120,000 Class A shares for about $8.97 million.
- Amalgamated Financial Corp. (AMAL) - Workers United sold multiple blocks totaling approximately $6.38 million; stock has outperformed over one-year and year-to-date horizons.
- Marathon Petroleum Corp (MPC) - Chief Legal Officer sold 17,196 shares under a pre-arranged 10b5-1 plan for $6,165,969; stock has since climbed to near its 52-week high.
These filings are contemporaneous disclosures of holdings changes and are intended to keep the market informed about insider activity. They report exact transaction detail but do not include forward-looking commentary or management rationale for the trades beyond what is presented in the filings.