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  4. [Form 4/A] Aura Minerals Inc. Amended Insider Trading Activity

Aura Minerals (AUGO) insider sells BDRs, exchanges 750K into shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

Aura Minerals Inc. (AUGO) director Bruno Sousa Mauad, through indirect holdings "By Kapitalo Investimentos," reported multiple transactions in Brazilian Depository Receipts (BDRs) and common shares on August 20, 2026. All positions are disclaimed as beneficially owned except to the extent of any pecuniary interest.

The indirect holder sold 39,533 BDRs at $28.32 and 75,084 BDRs at $29.06 per BDR, and separately sold 125,000 common shares at $86.00 per share. In related derivative activity, 750,000 BDRs (each three BDRs representing one common share) were exchanged into 250,000 common shares, which were reported as acquired through this exchange. BDR prices and the $28.93 exchange price were reported as weighted averages in Brazilian reais and converted into U.S. dollars using Banco Central do Brasil’s rate on August 20, 2026. All transactions were reported as indirect, with no remaining post‑transaction share balances stated.

Positive

  • None.

Negative

  • None.
Insider Sousa Mauad Bruno
Role Director
Sold 239,617 shs ($14.05M)
Approx. gross sale proceeds $10.75M
Type Security Shares Price Value
Sale Brazilian Depository Receipts F2, F3 39,533 $28.32 $1.12M
Sale Brazilian Depository Receipts F2, F4 75,084 $29.06 $2.18M
Conversion Brazilian Depository Receipts F2, F5, F6 750,000 $28.93 $21.70M
Sale Common Shares 125,000 $86.00 $10.75M
Conversion Common Shares F1 250,000 $86.57 $21.64M
Holdings After Transaction: Brazilian Depository Receipts — 14,770,172 shares (Indirect, By Kapitalo Investimentos); Common Shares — 293,765 shares (Indirect, By Kapitalo Investimentos)
Footnotes (6)
  1. F1. The shares were acquired through the exchange of Brazilian Depositary Receipts ("BDRs") into Common Shares, no par value ("Common Shares"), of the Issuer.
  2. F2. BDRs are certificates representing Common Shares of the Issuer. Three BDRs represent one Common Share of the Issuer.
  3. F3. The price reported is a weighted average price. These BDRs were sold in multiple transactions at prices ranging from $27.88 to $28.83, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of BDRs sold at each separate price within the ranges set forth in footnote (3) to this Form 4. The weighted average price, R$146,43 Brazilian reais ("BRL") per BDR, has been converted to U.S. dollars ("USD") using the Banco Central do Brasil's conversion rate as of August 20, 2026.
  4. F4. The price reported is a weighted average price. These BDRs were sold in multiple transactions at prices ranging from $28.84 to $29.30, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of BDRs sold at each separate price within the ranges set forth in footnote (4) to this Form 4. The weighted average price, R$150.25 Brazilian reais ("BRL") per BDR, has been converted to U.S. dollars ("USD") using the Banco Central do Brasil's conversion rate as of August 20, 2026.
  5. F5. These BDRs were disposed through the exchange of BDRs into Common Shares of the Issuer.
  6. F6. The stated price in USD of $28.93 has been converted from Brazilian Reais to USD using the Banco Central do Brasil's conversion rate as of August 20, 2026.
BDRs sold 39,533 Brazilian Depository Receipts Sold on August 20, 2026 at $28.32 per BDR
BDRs sold 75,084 Brazilian Depository Receipts Sold on August 20, 2026 at $29.06 per BDR
Common shares sold 125,000 common shares Sold on August 20, 2026 at $86.00 per share
BDRs exchanged 750,000 Brazilian Depository Receipts Disposed through exchange into common shares on August 20, 2026
Common shares acquired 250,000 common shares Acquired through exchange of BDRs on August 20, 2026
BDR-to-common share ratio 3 BDRs per 1 common share Each Brazilian Depository Receipt represents one-third of a common share
Brazilian Depository Receipts financial
"Brazilian Depository Receipts ("BDRs") are certificates representing Common Shares"
Brazilian Depositary Receipts are financial certificates issued in Brazil that represent ownership of shares in companies listed outside Brazil, allowing local investors to buy and sell foreign stocks without using a foreign exchange. They matter because they let investors easily access international companies while trading in local currency and under domestic rules, exposing portfolios to foreign business performance and currency moves much like buying a locally labeled version of a foreign product.
weighted average price financial
"The price reported is a weighted average price. These BDRs were sold"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
pecuniary interest financial
"disclaims beneficial ownership ... except to the extent of its pecuniary interest"
conversion rate financial
"converted to U.S. dollars ("USD") using the Banco Central do Brasil's conversion rate"
Conversion rate is the proportion of items, people or contracts that take a desired action out of the total possible — for example the share of website visitors who make a purchase, or the number of convertible bonds that are exchanged for shares. Investors care because it measures how effectively a business or financial instrument turns opportunity into real outcomes, like sales or share issuance, which directly affects revenue, cash flow and ownership dilution.
derivative security financial
"Conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

FAQ

What insider transactions did AUGO director Bruno Sousa Mauad report on August 20, 2026?
On August 20, 2026, an entity associated with director Bruno Sousa Mauad sold 39,533 BDRs at $28.32, 75,084 BDRs at $29.06, and 125,000 common shares at $86.00, and exchanged 750,000 BDRs into 250,000 common shares of Aura Minerals Inc.

How are Aura Minerals (AUGO) shares represented by the reported Brazilian Depository Receipts?
The filing states that Brazilian Depository Receipts (BDRs) are certificates representing Aura Minerals common shares and that three BDRs represent one common share of the issuer.

Were the Aura Minerals (AUGO) insider transactions made directly by Bruno Sousa Mauad?
No. All reported securities are held indirectly, noted as "By Kapitalo Investimentos." Each reporting person disclaims beneficial ownership except to the extent of any pecuniary interest in the securities.

What prices were realized in the BDR sales reported for AUGO on August 20, 2026?
The BDR sales were reported at $28.32 and $29.06 per BDR, each described as a weighted average price for multiple trades. The underlying BDR prices were in Brazilian reais and converted into U.S. dollars using the Banco Central do Brasil rate on August 20, 2026.

Was a Rule 10b5-1 trading plan indicated for the Aura Minerals (AUGO) Form 4/A transactions?
No. The filing’s Rule 10b5-1 checkbox is not marked as true (aff_10b5_one is false), and the footnotes do not state that the trades were executed under a Rule 10b5-1 plan.

What common share activity resulted from the BDR exchange reported for AUGO?
The report states that 750,000 BDRs were disposed through exchange into Aura Minerals common shares, and that 250,000 common shares were acquired through this exchange, consistent with the ratio of three BDRs representing one common share.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Sousa Mauad Bruno
(Last)(First)(Middle)
C/O AURA TECHNICAL SERVICES INC.
3390 MARY ST, SUITE 116
(Street)
COCONUT GROVE FLORIDA 33133
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Aura Minerals Inc. [ AUGO ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)
08/20/2026
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Shares08/20/2026S125,000D$8643,765IBy Kapitalo Investimentos
Common Shares08/20/2026C250,000(1)A$86.57293,765IBy Kapitalo Investimentos
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Brazilian Depository Receipts(2)08/20/2026S39,533(2) (2) (2)Common shares, no par value13,177.67$28.32(3)15,595,256IBy Kapitalo Investimentos
Brazilian Depository Receipts(2)08/20/2026S75,084 (2) (2)Common shares, no par value25,028$29.06(4)15,520,172IBy Kapitalo Investimentos
Brazilian Depository Receipts(2)08/20/2026C750,000(5) (2) (2)Common shares, no par value250,000$28.93(6)14,770,172IBy Kapitalo Investimentos
Explanation of Responses:
1. The shares were acquired through the exchange of Brazilian Depositary Receipts ("BDRs") into Common Shares, no par value ("Common Shares"), of the Issuer.
2. BDRs are certificates representing Common Shares of the Issuer. Three BDRs represent one Common Share of the Issuer.
3. The price reported is a weighted average price. These BDRs were sold in multiple transactions at prices ranging from $27.88 to $28.83, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of BDRs sold at each separate price within the ranges set forth in footnote (3) to this Form 4. The weighted average price, R$146,43 Brazilian reais ("BRL") per BDR, has been converted to U.S. dollars ("USD") using the Banco Central do Brasil's conversion rate as of August 20, 2026.
4. The price reported is a weighted average price. These BDRs were sold in multiple transactions at prices ranging from $28.84 to $29.30, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of BDRs sold at each separate price within the ranges set forth in footnote (4) to this Form 4. The weighted average price, R$150.25 Brazilian reais ("BRL") per BDR, has been converted to U.S. dollars ("USD") using the Banco Central do Brasil's conversion rate as of August 20, 2026.
5. These BDRs were disposed through the exchange of BDRs into Common Shares of the Issuer.
6. The stated price in USD of $28.93 has been converted from Brazilian Reais to USD using the Banco Central do Brasil's conversion rate as of August 20, 2026.
Remarks:
Each Reporting Person disclaims beneficial ownership in the securities reported on this Form 4 except to the extent of its pecuniary interest, if any, therein, and this report shall not be deemed to be an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
Bruno Sousa Mauad08/27/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR