PTGX notice: 9,000 shares sold under 10b5-1

PTGX-related transaction notice: A broker-dealer submission lists the proposed sale and related exercise of 9,000 shares.

Rhea-AI Filing Summary

PTGX-related transaction notice: A broker-dealer submission lists the proposed sale and related exercise of 9,000 shares. The filing records a 10b5-1 sale of 9,000 shares on 05/29/2026 producing $896,730.30 and an exercise of stock options for 9,000 shares on 06/10/2026 with cash payment.

Insights

Corporate Governance Analyst

Notice shows an option exercise paired with a pre-arranged sale under a 10b5-1 plan.

The filing lists a 10b5-1 sale of 9,000 shares on 05/29/2026 that produced $896,730.30. It also records an exercise of stock options for 9,000 shares on 06/10/2026, paid in cash to the issuer.

Cash flows and economic effect depend on whether the exercised shares funded the sale; the excerpt links the two events but does not state per-share strike or net proceeds retained. Subsequent filings may report final ownership positions.

Key Figures

Shares sold (10b5-1): 9,000 shares Proceeds from sale: $896,730.30 Options exercised: 9,000 shares +1 more

4 metrics

Shares sold (10b5-1) 9,000 shares 10b5-1 sale on 05/29/2026

Proceeds from sale $896,730.30 10b5-1 sale on 05/29/2026

Options exercised 9,000 shares Exercise of stock options on 06/10/2026, cash payment

Form type Form 144 Notice of proposed sale under Rule 144

Key Terms

10b5-1 Sales, Exercise of Stock Options, Form 144

3 terms

10b5-1 Sales regulatory

"10b5-1 Sales for D WADDILL 7707 Gateway Boulevard"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Exercise of Stock Options financial

"Exercise of Stock Options | Issuer | 9000 | 06/10/2026"

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.

FAQ

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

What does the PTGX Form 144 show about the 9,000 shares?

The Form 144 records a proposed sale and an option exercise of 9,000 shares. It lists a 10b5-1 sale on 05/29/2026 and an option exercise on 06/10/2026 for the same share count.

How much cash was reported from the 10b5-1 sale in the PTGX filing?

The filing shows proceeds of $896,730.30 from the 10b5-1 sale executed on 05/29/2026. The document pairs this sale amount with the 9,000-share figure.

Was the option exercise for PTGX paid in cash or stock?

The excerpt states the exercise of stock options for 9,000 shares on 06/10/2026 was paid in cash to the issuer, per the filing's method-of-payment field.

Who is listed as the seller in the PTGX excerpt?

The excerpt shows 10b5-1 Sales for D WADDILL with an address in Newark, CA, tied to the 05/29/2026 sale of 9,000 shares generating $896,730.30.

Does the Form 144 disclose the option strike price or remaining holdings?

No. The provided excerpt does not state the option strike price or post-transaction holdings. The filing lists shares, dates, and sale proceeds but omits strike and remaining position details.

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

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Accepted by SEC EDGAR 06/10/2026 - 04:29 PM EDT 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	0001553338
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	PROTAGONIST THERAPEUTICS, INC.
SEC File Number	001-37852
Address of Issuer	7707 Gateway Boulevard, Suite 140 Newark CALIFORNIA 94560
Phone	5104740170
Name of Person for Whose Account the Securities are To Be Sold	WILLIAM WADDILL
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

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	9000	952830.00	64311373	06/10/2026	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	06/10/2026	Exercise of Stock Options	Issuer			9000	06/10/2026	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
10b5-1 Sales for WILLIAM D WADDILL 7707 Gateway Boulevard, Suite 140 Newark CA 94560	Common	05/29/2026	9000	896730.30

144: Remarks and Signature

Remarks
Date of Notice	06/10/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/27/2026
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/ William Duryea Waddill
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)