MASS Form 144: 18,255 PSUs listed for resale

Morgan Stanley Smith Barney LLC submitted a Form 144 notice relating to proposed sales of Common stock issued as Performance Stock Units (PSUs), listing 18,255 units.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC submitted a Form 144 notice relating to proposed sales of Common stock issued as Performance Stock Units (PSUs), listing 18,255 units. The filing shows a reported sale by John Kenneweg of 7,787 PSUs on 05/01/2026 for $53,185.21.

Insights

Securities Compliance Analyst

Routine Form 144 notice for insider resale of PSUs; amounts and dates are disclosed.

The filing lists 18,255 Performance Stock Units proposed for sale and documents a prior disposition by John Kenneweg of 7,787 PSUs on 05/01/2026 for $53,185.21. This is a standard resale notice under Section 15(g).

Cash‑flow treatment and broader proceeds usage are not stated; subsequent filings or trade reports would show actual market transactions. Timing and methods of any remaining sales are not described in the excerpt.

Key Figures

PSUs listed for resale: 18,255 units PSUs sold (reported): 7,787 units Gross proceeds reported: $53,185.21 +2 more

5 metrics

PSUs listed for resale 18,255 units listed in the Form 144 notice

PSUs sold (reported) 7,787 units sold by John Kenneweg on 05/01/2026

Gross proceeds reported $53,185.21 proceeds from the 7,787 PSU sale on 05/01/2026

Broker/dealer listed Morgan Stanley Smith Barney LLC intermediary at 1 New York Plaza, New York, NY

Form date shown 05/08/2026 date field present in the filing excerpt

Key Terms

Performance Stock Units (PSUs), Form 144, Gross proceeds

3 terms

Performance Stock Units (PSUs) financial

"Performance Stock Units | Issuer | 18255 | 05/01/2026"

Performance stock units (PSUs) are a form of executive or employee pay that promise company shares only if pre-set performance goals are met over a defined period; think of them as a bonus paid in stock that arrives only when the company hits agreed targets. Investors watch PSUs because they affect the number of shares outstanding (dilution) and reveal how management’s pay is tied to financial or operational results, aligning incentives with shareholder outcomes.

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Gross proceeds financial

"7787 | 53185.21"

The total amount of cash a company receives from a financing event or sale before any fees, expenses, taxes or deductions are taken out. Investors watch gross proceeds because it shows the raw scale of new capital being raised—think of it as the paycheck amount before withholdings—which helps assess how much funding is available for operations, growth, debt payoff or how much shareholder dilution might occur once costs are removed.

FAQ

What does the MASS Form 144 disclose?

The Form 144 discloses a proposed resale of 18,255 Performance Stock Units and a reported sale by John Kenneweg of 7,787 PSUs on 05/01/2026 for $53,185.21. It is a regulatory notice of intent to sell.

Who is the selling party listed in the MASS filing?

The filing indicates John Kenneweg as a reporting person who disposed of 7,787 PSUs on 05/01/2026. The intermediary listed is Morgan Stanley Smith Barney LLC at 1 New York Plaza, New York, NY.

What securities are covered by the Form 144 for MASS?

The Form 144 covers Common stock issued as Performance Stock Units (PSUs). The document lists a proposed amount of 18,255 PSUs and previously sold 7,787 PSUs on 05/01/2026 with proceeds shown.

Does the Form 144 state how sale proceeds will be used?

The excerpt does not state how sale proceeds will be used. The filing lists a prior sale's gross proceeds of $53,185.21, but it does not allocate or describe the recipient or use of those funds.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/08/2026 - 04:35 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001836876
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	908 DEVICES INC.
SEC File Number	001-39815
Address of Issuer	44 Third Avenue Burlington MASSACHUSETTS 01803
Phone	857-254-1500
Name of Person for Whose Account the Securities are To Be Sold	JOHN WESLEY KENNEWEG
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	18255	148084.56	37813621	05/08/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/01/2026	Performance Stock Units	Issuer			18255	05/01/2026	Employee stock unit award(s)

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
John Kenneweg 44 Third Avenue Burlington MA 01803	PSU	05/01/2026	7787	53185.21

144: Remarks and Signature

Remarks
Date of Notice	05/08/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ John Wesley Kenneweg
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)