AptarGroup, Inc. (NYSE: ATR) Segment President sells 3,500 shares

Rhea-AI Filing Summary

Marc Prieur, Segment President of AptarGroup, sold a total of 3,500 shares of Common Stock on August 4, 2026 in two open-market transactions. One block of 3,376 shares was sold at a weighted average price of $136.2253 and another 124 shares at $137.0987.

Each reported price is a weighted average reflecting multiple trades, with individual prices ranging from $135.9000 to $136.8742 for the larger block and from $137.0908 to $137.1073 for the smaller block, as described in the transaction footnotes.

Insider Trade Summary

Net Seller: 3,500 shares

Net Sell 2 txns

Insider Prieur Marc

Role Segment President

Sold 3,500 shs ($477K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	3,376	$136.2253	$460K
Sale	Common Stock F2	124	$137.0987	$17K

Holdings After Transaction: Common Stock — 15,823 shares (Direct)

Footnotes (2)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $135.9000 to $136.8742, inclusive. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $137.0908 to $137.1073, inclusive. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Shares sold (first transaction): 3,376 shares Shares sold (second transaction): 124 shares Total shares sold: 3,500 shares +2 more

5 metrics

Shares sold (first transaction) 3,376 shares Common Stock sold on 2026-08-04 at weighted average price $136.2253

Shares sold (second transaction) 124 shares Common Stock sold on 2026-08-04 at weighted average price $137.0987

Total shares sold 3,500 shares Aggregate AptarGroup Common Stock sold across two transactions

Price range first sale $135.9000–$136.8742 Range of individual trade prices in first weighted-average sale

Price range second sale $137.0908–$137.1073 Range of individual trade prices in second weighted-average sale

Key Terms

weighted average price, open market or private transaction, Segment President

3 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

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.

open market or private transaction financial

"Transaction code S denotes a sale in open market or private transaction."

Segment President financial

"Reporting person is an officer with the title Segment President."

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/05/2026 - 05:51 PM Accepted by SEC EDGAR 08/05/2026 - 05:50 PM Learn about SEC filing dates

FAQ

What insider stock sale did AptarGroup (ATR) disclose for Marc Prieur?

AptarGroup reported that Segment President Marc Prieur sold 3,500 shares of Common Stock on August 4, 2026 in two open-market transactions. He sold 3,376 shares at a weighted average of $136.2253 and 124 shares at a weighted average of $137.0987.

On what date did AptarGroup (ATR) executive Marc Prieur sell shares?

Marc Prieur’s reported stock sales occurred on August 4, 2026. On that date, he executed two open-market transactions in AptarGroup Common Stock totaling 3,500 shares, as detailed in the Form 4 insider trading disclosure filed with regulators.

What prices were received in Marc Prieur’s AptarGroup (ATR) stock sales?

The sales used weighted average prices of $136.2253 for 3,376 shares and $137.0987 for 124 shares. Footnotes explain these averages reflect multiple trades, with individual prices ranging from $135.9000 to $137.1073 across the two reported transactions.

How many AptarGroup (ATR) shares did Marc Prieur sell in each transaction?

Marc Prieur sold 3,376 shares of AptarGroup Common Stock in one transaction and 124 shares in a second transaction. Both occurred on August 4, 2026 and were reported as open-market or private sales at weighted average per-share prices.

What do the weighted average price footnotes mean in the AptarGroup (ATR) Form 4?

The Form 4 notes that reported prices are weighted averages, not single trade prices. Each transaction comprised multiple trades within specified ranges, and Marc Prieur offers to provide full breakdowns of shares sold at each individual price upon request by relevant parties.

What is Marc Prieur’s role at AptarGroup (ATR) mentioned in the Form 4?

Marc Prieur is identified as a Segment President at AptarGroup. His officer status is disclosed alongside the reported open-market sales of 3,500 shares of Common Stock, providing context that these transactions involve a senior operating executive of the company.

SEC Form 4

FORM 4

UNITED 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^*

Prieur Marc

(Last) (First) (Middle)

C/O APTARGROUP, INC.

265 EXCHANGE DRIVE, SUITE 301

(Street)

CRYSTAL LAKE ILLINOIS 60014

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
APTARGROUP, INC. [ ATR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Segment President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/04/2026		S		3,376	D	$136.2253(1)	15,947	D
Common Stock	08/04/2026		S		124	D	$137.0987(2)	15,823	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $135.9000 to $136.8742, inclusive. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $137.0908 to $137.1073, inclusive. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

	Marc Prieur by Irene Hudson as attorney-in-fact	08/05/2026
	** Signature of Reporting Person	Date
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)