Natera holder plans $65M sale of 200K shares

Natera, Inc. (NTRA) received a Form 144 notice from stockholder Matthew Rabinowitz covering a proposed sale of 200,000 shares of common stock, to be handled through Morgan Stanley Smith Barney LLC’s Executive Financial Services desk on Nasdaq.

Rhea-AI Filing Summary

Natera, Inc. (NTRA) received a Form 144 notice from stockholder Matthew Rabinowitz covering a proposed sale of 200,000 shares of common stock, to be handled through Morgan Stanley Smith Barney LLC’s Executive Financial Services desk on Nasdaq. The shares were obtained through the exercise of stock options between May 8, 2024 and November 11, 2024.

The notice also lists prior sales of Natera common stock during the past three months by Matthew Rabinowitz and the TINKERBELLE II Trust, including two 10b5-1 plan sales of 50,000 shares each on June 12, 2026 and June 15, 2026, plus several smaller transactions.

Key Figures

Shares proposed for sale: 200,000 shares Proposed aggregate market value: $65,228,000.00 10b5-1 sale on June 12, 2026: 50,000 shares for $10,701,645.00 +5 more

8 metrics

Shares proposed for sale 200,000 shares Common stock covered by the Form 144 notice

Proposed aggregate market value $65,228,000.00 Aggregate market value reported for the 200,000 shares

10b5-1 sale on June 12, 2026 50,000 shares for $10,701,645.00 Sale of Natera common stock under a 10b5-1 plan

10b5-1 sale on June 15, 2026 50,000 shares for $10,745,665.00 Sale of Natera common stock under a 10b5-1 plan

Sale on July 6, 2026 by TINKERBELLE II Trust 1,000 shares for $280,000.00 Sale of Natera common stock by TINKERBELLE II Trust

Sale on August 3, 2026 by TINKERBELLE II Trust 731 shares for $195,900.18 Additional sale of Natera common stock by TINKERBELLE II Trust

Date options first exercised for these shares May 8, 2024 Start of period when stock options were exercised for the securities to be sold

Date of Form 144 notice September 11, 2026 Date the notice to sell Natera shares was filed

Key Terms

Rule 144, 10b5-1, Previously Exercised Stock Options, Executive Financial Services, +1 more

5 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.

10b5-1 regulatory

"10b5-1 Sales for MATTHEW RABINOWITZ 13011 McCallen Pass..."

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Previously Exercised Stock Options financial

"Common | 05/08/2024 | Previously Exercised Stock Options | Issuer"

Executive Financial Services financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

Form 144 regulatory

"144: Securities 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing for NTRA disclose about planned share sales?

The Form 144 filing states that Matthew Rabinowitz may sell up to 200,000 shares of Natera, Inc. (NTRA) common stock. The shares were acquired through stock option exercises between May 8, 2024 and November 11, 2024.

Who is the broker for the potential NTRA share sales under this Form 144?

The filing identifies Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, as the broker handling the potential sale of 200,000 Natera common shares on Nasdaq.

How many Natera (NTRA) shares has Matthew Rabinowitz sold recently?

Over the past three months, the filing lists sales including 50,000 shares on June 12, 2026 for $10,701,645.00 and 50,000 shares on June 15, 2026 for $10,745,665.00, both described as 10b5-1 sales, plus additional smaller transactions.

What sales by the TINKERBELLE II Trust related to NTRA are disclosed?

The TINKERBELLE II Trust is reported as having sold 1,000 Natera common shares on July 6, 2026 for $280,000.00 and 731 shares on August 3, 2026 for $195,900.18, according to the past three months’ sales section.

Were the NTRA shares in this Form 144 obtained from option exercises?

Yes. The remarks state that the securities to be sold were received upon the exercise of stock options from May 8, 2024 to November 11, 2024. The securities to be sold section also describes the source as Previously Exercised Stock Options.

When was the notice to sell Natera (NTRA) shares dated?

The Date of Notice in the Form 144 is September 11, 2026, and the document is electronically signed by Matthew Rabinowitz.

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

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Available on EDGAR 09/11/2026 - 04:29 PM Accepted by SEC EDGAR 09/11/2026 - 04:28 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	0001646382
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	NATERA, INC.
SEC File Number	001-37478
Address of Issuer	13011 McCallen Pass, Bldg A Suite 100 Austin TEXAS 78753
Phone	6509809190
Name of Person for Whose Account the Securities are To Be Sold	MATTHEW RABINOWITZ
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	Director
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
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	200000	65228000.00	144144170	09/11/2026	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	05/08/2024	Previously Exercised Stock Options	Issuer			200000	05/08/2024	Cash

* 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
TINKERBELLE II TR U/A DTD 10/22/2021 13011 McCallen Pass, Bldg A Suite 100 Austin TX 78753	Common	08/03/2026	731	195900.18
MATTHEW RABINOWITZ 13011 McCallen Pass, Bldg A Suite 100 Austin TX 78753	Common	07/27/2026	1718	447523.19
TINKERBELLE II TR U/A DTD 10/22/2021 13011 McCallen Pass, Bldg A Suite 100 Austin TX 78753	Common	07/06/2026	1000	280000.00
10b5-1 Sales for MATTHEW RABINOWITZ 13011 McCallen Pass, Bldg A Suite 100 Austin TX 78753	Common	06/15/2026	50000	10745665.00
10b5-1 Sales for MATTHEW RABINOWITZ 13011 McCallen Pass, Bldg A Suite 100 Austin TX 78753	Common	06/12/2026	50000	10701645.00

144: Remarks and Signature

Remarks	The securities to be sold were received upon the exercise of stock options from 5/8/2024 to 11/11/2024.
Date of Notice	09/11/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/12/2026
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/ Matthew Rabinowitz
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)