AWM sells 186,942 908 Devices shares in open market
AWM Investment Company, Inc., a 10% owner of 908 Devices Inc., reported open-market sales totaling 186,942 shares of common stock through a limited partnership on May 27–28, 2026.
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Form Type
4
Rhea-AI Filing Summary
AWM Investment Company, Inc., a 10% owner of 908 Devices Inc., reported open-market sales totaling 186,942 shares of common stock through a limited partnership on May 27–28, 2026. Sale prices ranged from about $8.25 to $8.66 per share, leaving 4,929,773 shares indirectly held afterward. AWM reports these holdings as investment adviser to several funds and disclaims beneficial ownership beyond its pecuniary interest.
Insider Trade Summary
Net Seller: 186,942 shares
Net Sell
3 txns
Insider
AWM Investment Company, Inc.
Role
10% Owner
Sold
186,942 shs ($1.61M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | 908 DEVICES, INC. | 170,442 | $8.6594 | $1.48M |
| Sale | 908 DEVICES, INC. | 1,500 | $8.25 | $12K |
| Sale | 908 DEVICES, INC. | 15,000 | $8.2527 | $124K |
Holdings After Transaction:
908 DEVICES, INC. — 4,929,773 shares (Indirect, By Limited Partnership)
Footnotes (3)
- F1. This is a weighted average price
- F2. David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are the controlling principals of AWM. The reporting person disclaims beneficial ownership of the Shares, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
- F3. AWM Investment Company, Inc., a Delaware Corporation (AWM), is the investment adviser to Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (CAY), Special Situations Private Equity Fund, L.P. (SSPE), Special Situations Technology Fund, L.P. (TECH) and Special Situations Technology Fund II, L.P. (TECH II and together with SSFQP, CAY, SSPE and TECH, the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 2,054,000 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 588,327 Shares held by CAY, 271,986 Shares held by SSPE, 338,137 Shares held by TECH and 1,677,323 Shares held by TECH II.
Key Figures
Shares sold: 186,942 shares
May 28 sale price: $8.6594 per share
May 27 sale prices: $8.2527 and $8.2500 per share
+2 more
5 metrics
Shares sold
186,942 shares
Net open-market sales on May 27–28, 2026
May 28 sale price
$8.6594 per share
Weighted average price for 170,442-share sale
May 27 sale prices
$8.2527 and $8.2500 per share
Weighted average prices for 15,000- and 1,500-share sales
Post-transaction holdings
4,929,773 shares
Indirect shares held after May 28, 2026 sale
Fund-level holdings
2,054,000; 588,327; 271,986; 338,137; 1,677,323 shares
Shares held by SSFQP, CAY, SSPE, TECH, TECH II
Key Terms
open-market sale, beneficial ownership, pecuniary interest, investment adviser, +1 more
5 terms
open-market sale financial
"transaction_action: "open-market sale" for reported share dispositions"
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
beneficial ownership financial
"reporting person disclaims beneficial ownership of the Shares, except to the extent of its pecuniary interest"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"disclaims beneficial ownership of the Shares, except to the extent of its pecuniary interest therein"
investment adviser financial
"AWM Investment Company, Inc. is the investment adviser to Special Situations funds"
An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.
Section 16 of the Securities Exchange Act of 1934 financial
"shall not be deemed an admission that the reporting person is the beneficial owner of the securities reported herein for purposes of Section 16"
A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transactions did AWM Investment Company report for 908 Devices (MASS)?
AWM Investment Company reported selling 186,942 shares of 908 Devices common stock in open-market transactions on May 27–28, 2026. These indirect sales were executed through a limited partnership at prices around $8.25 to $8.66 per share.
Were AWM Investment Company’s 908 Devices (MASS) sales direct or indirect holdings?
The reported 908 Devices sales were from indirect holdings, noted as “By Limited Partnership.” AWM is the investment adviser to multiple funds that own the shares and reports sole voting and investment power while disclaiming beneficial ownership beyond its pecuniary interest.
What does AWM’s Form 4 say about its beneficial ownership of 908 Devices (MASS)?
AWM states it is investment adviser to several funds holding 908 Devices shares and has sole voting and investment power over those positions. It disclaims beneficial ownership of the securities except to the extent of its pecuniary interest, consistent with Section 16 reporting conventions.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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