Martin Jackson Sells Shares of SEM
Martin Jackson, Executive Vice President of SEM, sold over 1.3 million shares.
Key Points
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Martin Jackson, the Executive Vice President at SEM, sold a significant number of shares in the company. On June 30, 2026, Jackson sold 1,388,689 shares, though the transaction wasn't planned under a Rule 10b5-1 trading plan. This move comes as SEM's stock traded at $16.51 on Wednesday.
Other Institutional Activity in SEM
BlackRock, Inc. trimmed its holdings in SEM by 1,440,407 shares, now holding 17,263,327 shares valued at about $281.2 million, marking a 7.7% decrease. Meanwhile, Vanguard Portfolio Management LLC opened a new position in SEM, acquiring 6,723,557 shares worth approximately $109.5 million. Dimensional Fund Advisors LP increased its holdings by 202,736 shares to a total of 5,536,331 shares, valued at roughly $90.2 million, reflecting a 3.8% increase. FIL Ltd and Vanguard Capital Management LLC also initiated new positions, holding 4,960,732 and 4,819,685 shares valued at $80.8 million and $78.5 million, respectively.
Insider Buying and Selling at SEM
Several other insiders joined Jackson in selling shares on June 30, 2026. Marilyn Tavenner sold 36,035 shares at $16.50 each. John Saich, the President, sold 736,412 shares, while James Ely III sold 161,674 shares at the same price. John Duggan, another Executive Vice President, sold 194,710 shares. David Chernow, the Vice Chairman, and Christopher Weigl, a Senior Vice President, sold 656,823 and 40,000 shares, respectively.
Analysts Set New Price Targets
On May 13, 2026, Mizuho downgraded SEM to a hold rating with a price target of $16.50. Earlier, on March 3, 2026, RBC Capital also downgraded the stock to hold, setting the same target. Despite these downgrades, RBC Capital had maintained a buy rating with higher targets in previous months.
Bottom Line
The recent insider sales at SEM, including those by Executive Vice President Martin Jackson, reflect a notable shift in insider sentiment. Institutional investors have also been active, with some reducing and others initiating positions. Analyst downgrades to hold suggest a more cautious outlook. As always, these insider and institutional activities provide a backward-looking glimpse into the stock's dynamics.
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