QuantumScape (NYSE: QS) insider may sell 35,801 shares for taxes

Rhea-AI Filing Summary

QuantumScape Corp (QS) discloses that insider Michael O. McCarthy III has filed a notice under Rule 144 for a potential sale of 35,801 shares of Class A Common Stock through Morgan Stanley Smith Barney LLC on or after 08/18/2026. The filing notes that QuantumScape has 587,219,164 shares of this class outstanding. The shares relate to 55,079 restricted stock units that vest on 08/17/2026 and the number to be sold is described as an estimate to cover tax obligations on that vesting. The notice also lists a prior sale of 24,211 shares on 05/18/2026 for $178,485.91.

Key Figures

Shares to be sold: 35,801 shares Aggregate market value of planned sale: $219,102.12 Shares outstanding: 587,219,164 shares +3 more

6 metrics

Shares to be sold 35,801 shares Class A Common Stock planned for Rule 144 sale through broker

Aggregate market value of planned sale $219,102.12 Estimated value of 35,801 shares to be sold

Shares outstanding 587,219,164 shares Outstanding Class A Common Stock for QuantumScape

RSUs vesting 55,079 shares Restricted stock units vesting on 08/17/2026

Prior shares sold 24,211 shares Sale on 05/18/2026 disclosed as past 3-month transaction

Proceeds from prior sale $178,485.91 Value of 24,211 shares sold on 05/18/2026

Key Terms

Rule 144, restricted stock units, aggregate market value

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock units financial

"cover tax obligations on the release of restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

aggregate market value financial

"Class A Common Stock | ... | 35801 | 219102.12 | 587219164"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

What insider transaction did QuantumScape (QS) disclose in this Rule 144 notice?

The notice states that Michael O. McCarthy III may sell up to 35,801 shares of QuantumScape Class A Common Stock under Rule 144, with the sale planned through Morgan Stanley Smith Barney LLC on or after 08/18/2026.

How many QuantumScape (QS) shares are outstanding according to this filing?

The filing lists 587,219,164 shares of QuantumScape Class A Common Stock outstanding. This figure provides context for the potential 35,801-share sale that Michael O. McCarthy III has noticed under Rule 144.

What is the value of the QuantumScape (QS) shares subject to the planned Rule 144 sale?

The potential sale of 35,801 shares of QuantumScape Class A Common Stock has an aggregate market value of $219,102.12, as stated in the notice, based on the market price at the time of the filing.

What RSU vesting event is linked to this QuantumScape (QS) Rule 144 filing?

The notice links the transaction to 55,079 restricted stock units vesting on 08/17/2026. It explains that the estimated 35,801 shares to be sold represents an amount intended to cover tax obligations from this RSU vesting.

What previous QuantumScape (QS) share sale is disclosed for Michael O. McCarthy III?

The filing reports that on 05/18/2026, 24,211 shares of QuantumScape Class A Common Stock were sold for $178,485.91. This transaction is listed as securities sold during the past three months.

Which broker is handling the potential QuantumScape (QS) Rule 144 sale?

The potential Rule 144 sale will be handled through Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, New York. They are listed as the broker for the possible sale of 35,801 shares of Class A Common Stock on NASDAQ.

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

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Available on EDGAR 08/18/2026 - 06:29 PM Accepted by SEC EDGAR 08/18/2026 - 06:29 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	0001177264
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	QuantumScape Corp
SEC File Number	001-39345
Address of Issuer	1730 TECHNOLOGY DRIVE SAN JOSE CALIFORNIA 95110
Phone	(408) 452-2000
Name of Person for Whose Account the Securities are To Be Sold	MCCARTHY MICHAEL O III
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

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
Class A Common Stock	Morgan Stanley Smith Barney LLC 1 New York Plaza, 38th floor New York NY 10004	35801	219102.12	587219164	08/18/2026	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 *
Class A Common Stock	08/17/2026	RSU vesting	Issuer			55079	08/17/2026	Compensation

* 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
Michael O. McCarthy III 1730 Technology Dr. San Jose CA 95110	Class A Common Stock	05/18/2026	24211	178485.91

144: Remarks and Signature

Remarks	The number of shares to be sold represents an estimate of the amount necessary to cover tax obligations on the release of restricted stock units.
Date of Notice	08/18/2026
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/ Michael O. McCarthy III
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)