Insider Buying at MKS Signals Confidence in a Bullish Outlook
On February 17, 2026, EVP & GM of the Valves & Sensors Division, Taranto Eric Robert, executed a series of restricted‑stock‑unit (RSU) purchases totaling 3,504.31 shares, followed by a block of 1,764.15 common‑stock shares at the market price of $250.42. The RSU tranche represents a contingent award that will vest over three years, while the common‑stock purchase is a straightforward investment in the company’s equity. In the same 24‑hour window, other senior executives—including President & CEO Lee Tseng‑Chung and EVP Henry Philip—made comparable purchases, adding to a broader wave of insider buying.
The timing of these transactions is telling. MKS just reported its Q4 2025 results, with analysts forecasting a 20 % YoY growth for the electronics and packaging segments. The company’s stock was trading near the top of its 52‑week range, and the buy‑side activity from high‑level management is consistent with the expectation that the firm’s product relevance—particularly in AI‑driven semiconductor manufacturing—will continue to drive revenue. The 0.05 % dip in price on the day of the filing is statistically insignificant, and the neutral social‑media sentiment coupled with 80 % buzz suggests that the market is paying close attention but remains unshaken.
What It Means for Investors
Insider purchases of this magnitude are generally interpreted as a vote of confidence. With a market cap of $17.7 billion and a P/E of 63.7, MKS is already trading at a premium that reflects expectations of sustained growth. The recent buying spree may help to quell volatility, especially as the company moves through a transition period marked by a shift from traditional flat‑panel displays to AI‑enabled process equipment. For investors, the key question is whether the company can maintain its earnings trajectory. The strong insider activity suggests that senior leadership believes the current guidance is achievable, which could translate into a stable or rising share price as the firm rolls out new product lines.
Taranto Eric Robert: A Profile of Commitment
Taranto’s transaction history reveals a pattern of disciplined RSU accumulation. Since February 2026, he has purchased 3,504.31 RSUs (the largest single block in the recent filing) and has added an additional 1,764 shares of common stock in the same transaction. His holdings now stand at 24,177.14 shares, a 19 % increase over the prior 12 weeks. Historically, Robert’s trades have been limited to restricted‑stock units, with no prior sales recorded in the public domain. This consistency indicates a long‑term view, aligning his interests with shareholder value rather than short‑term liquidity needs.
Beyond the numbers, Robert’s role as EVP & GM of the VSD division positions him at the forefront of MKS’s growth engine. His insider buying signals that he expects the division’s upcoming product releases—particularly in the high‑performance gas‑control instruments—will meet or exceed market expectations. The cumulative effect of his trades, when combined with the purchases of his peers, underscores a leadership cohort that is bullish on MKS’s strategic direction.
Conclusion
The fresh wave of insider buying by MKS executives, especially Taranto Eric Robert, arrives on the heels of a robust earnings announcement and at a price point near the top of the company’s 52‑week range. For investors, this activity is a positive signal that the senior management team believes in the company’s future prospects. While the stock’s recent volatility and a modest P/E ratio warrant caution, the alignment of insider ownership with shareholder interests should give long‑term investors confidence that MKS is positioned to capitalize on the evolving semiconductor and AI markets.
| Date | Owner | Transaction Type | Shares | Price per Share | Security |
|---|---|---|---|---|---|
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Buy | 1,764.15 | 0.00 | Common Stock |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Buy | 914.05 | 0.00 | Common Stock |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Buy | 348.33 | 0.00 | Common Stock |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Buy | 976.00 | 0.00 | Common Stock |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Buy | 1,167.36 | 0.00 | Common Stock |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Buy | 1,303.00 | 0.00 | Common Stock |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Sell | 2,711.77 | 260.74 | Common Stock |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Buy | 1,758.96 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Sell | 1,764.15 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Sell | 914.05 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Sell | 348.33 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Sell | 976.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Sell | 1,167.36 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Taranto Eric Robert (EVP & GM, VSD) | Sell | 1,303.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Buy | 2,405.57 | 0.00 | Common Stock |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Buy | 1,247.16 | 0.00 | Common Stock |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Buy | 456.45 | 0.00 | Common Stock |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Buy | 1,278.00 | 0.00 | Common Stock |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Buy | 1,840.64 | 0.00 | Common Stock |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Buy | 2,054.00 | 0.00 | Common Stock |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Sell | 4,097.27 | 260.74 | Common Stock |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Buy | 2,567.13 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Sell | 2,405.57 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Sell | 1,247.16 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Sell | 456.45 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Sell | 1,278.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Sell | 1,840.64 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Henry David Philip (EVP, Global Str Mktg & GM, MSD) | Sell | 2,054.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Buy | 2,566.68 | 0.00 | Common Stock |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Buy | 1,330.43 | 0.00 | Common Stock |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Buy | 432.48 | 0.00 | Common Stock |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Buy | 1,211.00 | 0.00 | Common Stock |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Buy | 1,740.80 | 0.00 | Common Stock |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Buy | 1,944.00 | 0.00 | Common Stock |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Sell | 4,343.76 | 260.74 | Common Stock |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Buy | 2,376.97 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Sell | 2,566.68 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Sell | 1,330.43 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Sell | 432.48 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Sell | 1,211.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Sell | 1,740.80 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Schreiner James Alan (EVP & COO) | Sell | 1,944.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Buy | 300.39 | 0.00 | Common Stock |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Buy | 841.00 | 0.00 | Common Stock |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Buy | 990.72 | 0.00 | Common Stock |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Buy | 1,106.00 | 0.00 | Common Stock |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Sell | 1,195.49 | 260.74 | Common Stock |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Buy | 1,473.72 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Sell | 300.39 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Sell | 841.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Sell | 990.72 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Williams John Edward (EVP & GM, PSD) | Sell | 1,106.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Mayampurath Ramakumar (EVP & CFO) | Buy | 2,958.08 | 0.00 | Common Stock |
| 2026-02-17 | Mayampurath Ramakumar (EVP & CFO) | Buy | 2,702.00 | 0.00 | Common Stock |
| 2026-02-17 | Mayampurath Ramakumar (EVP & CFO) | Sell | 2,515.94 | 260.74 | Common Stock |
| 2026-02-17 | Mayampurath Ramakumar (EVP & CFO) | Buy | 4,278.54 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Mayampurath Ramakumar (EVP & CFO) | Sell | 2,958.08 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Mayampurath Ramakumar (EVP & CFO) | Sell | 2,702.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Buy | 3,450.86 | 0.00 | Common Stock |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Buy | 1,787.74 | 0.00 | Common Stock |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Buy | 562.54 | 0.00 | Common Stock |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Buy | 1,576.00 | 0.00 | Common Stock |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Buy | 2,336.00 | 0.00 | Common Stock |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Buy | 2,493.00 | 0.00 | Common Stock |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sell | 5,317.80 | 260.74 | Common Stock |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Buy | 3,327.76 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sell | 3,450.86 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sell | 1,787.74 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sell | 562.54 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sell | 1,576.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sell | 2,336.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sell | 2,493.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Buy | 22,088.09 | 0.00 | Common Stock |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Buy | 7,653.60 | 0.00 | Common Stock |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Buy | 3,859.12 | 0.00 | Common Stock |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Buy | 7,208.00 | 0.00 | Common Stock |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Buy | 16,989.44 | 0.00 | Common Stock |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Buy | 12,091.00 | 0.00 | Common Stock |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Sell | 32,548.31 | 260.74 | Common Stock |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Buy | 15,592.91 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Sell | 22,088.09 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Sell | 7,653.60 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Sell | 3,859.12 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Sell | 7,208.00 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Sell | 16,989.44 | 0.00 | Restricted Stock Unit |
| 2026-02-17 | Lee John Tseng-Chung (President & CEO) | Sell | 12,091.00 | 0.00 | Restricted Stock Unit |




