908 Devices CEO sells 149K shares under trading plan
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Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.
Form Type
4
Rhea-AI Filing Summary
908 Devices Inc. President and CEO Kevin J. Knopp reported open-market sales of an aggregate 149,013 shares of common stock over August 10–12, 2026, at weighted average prices around $9.06–$10.16, in transactions made pursuant to a Rule 10b5-1 trading plan adopted on May 20, 2025. An additional 541,223 shares are reported as indirectly owned through The Kevin J. Knopp Irrevocable Trust of 2018, for which his brother-in-law, as trustee, has sole voting and dispositive control, while Knopp may be deemed the beneficial owner.
Insights
Analyzing...
Insider Trade Summary 10b5-1
Net Seller: 149,013 shares
Net Sell
5 txns
Insider
Knopp Kevin J.
Role
President and CEO
Sold
149,013 shs ($1.48M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock F1, F5 | 2,747 | $10.07 | $28K |
| Sale | Common Stock F1, F3 | 115,748 | $9.83 | $1.14M |
| Sale | Common Stock F1, F4 | 30,170 | $10.16 | $307K |
| Sale | Common Stock F1, F2 | 348 | $9.06 | $3K |
| holding | Common Stock F6 | -- | -- | -- |
Holdings After Transaction:
Common Stock — 583,590 shares (Direct);
Common Stock — 541,223 shares (Indirect, See footnote)
Footnotes (6)
- F1. This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 20, 2025.
- F2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.05 to $9.08 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
- F3. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.08 to $10.0745 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
- F4. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.08 to $10.34 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
- F5. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.05 to $10.25 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
- F6. The shares are owned directly by The Kevin J. Knopp Irrevocable Trust of 2018. The reporting person's brother-in-law is the trustee of The Kevin J. Knopp Irrevocable Trust of 2018 and has sole voting and dispositive control with respect to all securities held by such trust. The reporting person may be deemed to be the beneficial owner of the securities held by The Kevin J. Knopp Irrevocable Trust of 2018.
Key Figures
Total shares sold: 149,013 shares
August 10 weighted average price: $9.06 per share
August 11 weighted average prices: $9.83 and $10.16 per share
+3 more
6 metrics
Total shares sold
149,013 shares
Aggregate common stock sales reported from August 10–12, 2026
August 10 weighted average price
$9.06 per share
Sale of 348 shares on August 10, 2026; trades ranged $9.05–$9.08
August 11 weighted average prices
$9.83 and $10.16 per share
Sales of 115,748 and 30,170 shares on August 11, 2026
August 12 weighted average price
$10.07 per share
Sale of 2,747 shares on August 12, 2026; trades ranged $10.05–$10.25
Indirect trust holdings
541,223 shares
Shares held by The Kevin J. Knopp Irrevocable Trust of 2018 as of August 10, 2026
10b5-1 plan adoption date
May 20, 2025
Date Kevin J. Knopp adopted the Rule 10b5-1 trading plan
Key Terms
Rule 10b5-1 trading plan, weighted average price, beneficial owner, irrevocable trust, +1 more
5 terms
Rule 10b5-1 trading plan regulatory
"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported is a weighted average price. These shares were sold"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
beneficial owner regulatory
"The reporting person may be deemed to be the beneficial owner of the securities"
A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.
irrevocable trust financial
"The shares are owned directly by The Kevin J. Knopp Irrevocable Trust of 2018"
An irrevocable trust is a legal arrangement where an owner transfers assets into a separate entity managed by a trustee and gives up the power to modify or reclaim those assets. For investors it matters because putting stock or other holdings into such a trust can change who controls and benefits from the assets, affect taxes and creditor protection, and influence how easy it is to sell or value those holdings—like placing valuables in a locked safe overseen by someone else.
voting and dispositive control regulatory
"has sole voting and dispositive control with respect to all securities held"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did 908 Devices (MASS) CEO Kevin J. Knopp report in this Form 4?
Kevin J. Knopp reported sales of 149,013 shares of 908 Devices common stock in multiple open-market transactions between August 10–12, 2026, under a pre-arranged Rule 10b5-1 trading plan adopted on May 20, 2025.
Were the 908 Devices (MASS) insider sales made under a Rule 10b5-1 plan?
Yes. The filing states the transactions were made pursuant to a Rule 10b5-1 trading plan adopted by Kevin J. Knopp on May 20, 2025, indicating the sales followed a pre-arranged trading schedule.
What indirect holdings of 908 Devices (MASS) stock are reported for Kevin J. Knopp?
The filing reports 541,223 shares of common stock held indirectly through The Kevin J. Knopp Irrevocable Trust of 2018, for which his brother-in-law is trustee. Knopp may be deemed the beneficial owner of these securities.
How many separate sale transactions did the 908 Devices (MASS) CEO report?
Kevin J. Knopp reported four non-derivative sale transactions in common stock from August 10–12, 2026, plus one additional entry reflecting 541,223 shares held indirectly through The Kevin J. Knopp Irrevocable Trust of 2018.
AI-generated analysis. How Rhea-AI works. Not financial advice.
