Monolithic Power’s EVP Trims 38,000 Shares Amid Rapid Stock Surge – Is Confidence Wavering?

Insider Selling Hot‑Spot at Monolithic Power Systems

On May 6, 2026 the company’s senior executive, EVP of Global Operations Xiao Deming, filed a Form 4 disclosing the sale of 38,663 shares of common stock in four separate transactions, averaging a price of roughly $1,650 per share. The sales occurred at a time when the stock closed near $1,576, just 0.02 % below the current price, and the broader market sentiment is mildly positive (+10) with a modest 55 % buzz. While the volume may appear modest relative to Monolithic’s 78 bn market cap, the fact that a key operating executive is trimming a sizeable position amid a rapid 22 % monthly gain and an 126 % YTD rally signals a potential shift in confidence.

What the Moves Mean for Investors

Insider sales can be a double‑edged sword. On the one hand, the timing—just after a steep monthly uptrend—raises questions about whether executives see the near‑term price ceiling at the 52‑week high of $1,662. On the other, Xiao’s trades are consistent with a long‑term view: he has steadily increased his stake from 201 k shares in October 2025 to 235 k in February 2026, only pulling out a small fraction each month. Analysts note that such “real‑time” sales are often used to lock in gains or to diversify personal holdings, rather than a signal of impending weakness. Nevertheless, the cumulative outflows of roughly 38 k shares (about 0.05 % of outstanding shares) could trigger a short‑term liquidity drag if the market interprets the trades as a lack of confidence in the company’s near‑term trajectory.

Xiao Deming’s Insider Profile

Xiao Deming’s insider history is marked by disciplined buying and selective selling. His most recent purchase in early February 2026 of 57,170 shares at $0 (likely a share‑based compensation transaction) was followed by a sale of 22,875 shares at $1,171 the same month. In October 2025 he bought 135,520 shares and later sold 54,543 shares at $1,096, indicating a pattern of holding through multiple earnings cycles while occasionally realizing gains. Over the past 18 months he has maintained a core holding of approximately 230 k shares, a sizable portion of the company’s 52‑week high‑volume pool. This consistency suggests that Xiao views Monolithic’s power‑electronics platform as a strategic long‑term play, even as he occasionally trims his position to manage personal liquidity.

Broader Insider Activity

The day’s filing is not an isolated event. Other senior executives—Wynne, Zhou, and Sciammas—filed sales of a few hundred shares each, while the legal and sales EVP, Tseng Saria, executed a series of large‑scale sales in April, moving 15–20 % of his position. These contemporaneous moves underscore a broader pattern of insiders balancing personal financial goals with a long‑term outlook. For investors, the key takeaway is that Monolithic’s executive team remains invested in the company, but is also exercising prudent portfolio management as the share price surges.

Implications for the Company’s Future

Monolithic Power Systems continues to benefit from a robust semiconductor‑power niche, reflected in a 112‑ratio P/E that is high but not unprecedented for growth tech. The insider activity, coupled with the company’s continued product pipeline and strategic partnerships, suggests that the executives are comfortable with the current valuation trajectory. For investors, the lesson is to monitor the timing of these sales relative to earnings releases and macro‑chip demand cycles. If the company sustains its innovation momentum and manages supply chain constraints, insider confidence is likely to remain high, even as executives occasionally liquidate portions of their holdings to lock in gains.