The Dow Jones closed higher by around 490 points on Tuesday. When insiders purchase or sell shares, it indicates their confidence or concern around the company's prospects. Investors and traders interested in penny stocks can consider this a factor in their overall investment or trading decision.

Below is a look at a few recent notable insider transactions for penny stocks. For more, check out Benzinga's insider transactions platform.

Earth Science Tech

• The Trade: Earth Science Tech, Inc. (OTC:ETST) CEO Giorgio R Saumat acquired a total of 102,416 shares an average price of $0.07. To acquire these shares, it cost around $7,573.
• What's Happening: The company posted net profit of $444,581 for its fiscal second quarter, versus a year-ago loss of $73,678.
• What Earth Science Tech Does: Earth Science Tech Inc is a diversified holding company. Currently, the company is focused on emerging prospects in the health and wellness industry.

Vivos

• The Trade: Vivos Inc. (OTC:RDGL) CEO and President Michael Korenko acquired a total of 100,000 shares at an average price of $0.05. To acquire these shares, it cost around $5,170.
• What's Happening: The company's stock fell 15% over the past six months.
• What Vivos Does: Vivos Inc is a radiation oncology medical device company. It is engaged in the development of RadioGel which is a brachytherapy device comprising highly insoluble particles delivered by needle injection using a water-polymer composite for high-dose treatment of non-resectable solid tumors.

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Gossamer Bio

• The Trade: Gossamer Bio, Inc. (NASDAQ:GOSS) COO/CFO Bryan Giraudo acquired a total of 200,000 shares at an average price of $0.56. The insider spent around $112,880 to buy those shares.
• What's Happening: Wedbush recently maintained Gossamer Bio with an Outperform and raised the price target from $5 to $6.
• What Gossamer Bio Does: Gossamer Bio Inc is a clinical-stage biopharmaceutical company. It focuses on discovering, acquiring, developing, and commercializing therapeutics in the disease areas of immunology, inflammation, and oncology.

What ESS Tech Does: ESS Tech Inc is a long-duration energy storage company specializing in iron flow battery technology.

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