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SEGMENT INFORMATION - Schedule of Reportable Segments (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) segment | Sep. 30, 2024 USD ($)
Segment Reporting [Abstract] |  |  |  |
Number of reportable segments | segment |  |  | 3 |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | $ 961,131 | $ 909,291 | $ 2,814,445 | $ 2,734,802
Cost of Sales (exclusive of depreciation and amortization): | 598,046 | 558,511 | 1,747,931 | 1,708,707
Selling, Research & Development and Administrative: | 148,760 | 141,604 | 455,176 | 443,714
Acquisition related costs | (1,896) | 0 | (2,240) | (140)
Restructuring Initiatives | (2,168) | (3,864) | (5,789) | (9,659)
Curtailment gain related to restructuring initiatives | 0 | 1,851 | 0 | 1,851
Net unrealized investment gain (loss) | (161) | 1,043 | 845 | 1,495
Gain from remeasurement of equity method investment | 26,518 | 0 | 26,518 | 0
Other special items | (4,400) | 0 | (4,400) | 0
Depreciation and amortization | (75,234) | (67,015) | (210,785) | (196,332)
Interest Expense | (13,532) | (12,290) | (35,733) | (32,526)
Interest Income | 2,400 | 3,022 | 7,094 | 9,022
Income before Income Taxes | 154,127 | 131,131 | 399,856 | 353,695
Optimization initiative |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Restructuring Initiatives | (2,168) | (3,864) | (5,789) | (9,676)
Prior year initiatives |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Restructuring Initiatives | 0 | 0 | 0 | 17
Aptar Pharma |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | 445,410 | 420,594 | 1,297,466 | 1,242,420
Aptar Beauty |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | 327,768 | 302,859 | 968,324 | 951,666
Aptar Closures |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | 187,953 | 185,838 | 548,655 | 540,716
Operating Segment |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | 970,317 | 917,032 | 2,841,582 | 2,762,563
Adjusted EBITDA | 235,855 | 223,795 | 678,490 | 637,512
Depreciation and amortization | (74,360) | (66,119) | (208,236) | (194,069)
Operating Segment | Aptar Pharma |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | 445,656 | 420,753 | 1,298,170 | 1,243,026
Cost of Sales (exclusive of depreciation and amortization): | 221,402 | 209,981 | 651,418 | 637,523
Selling, Research & Development and Administrative: | 63,539 | 58,779 | 186,725 | 179,883
Other Segment Items: | (5,300) | 240 | (5,727) | (246)
Adjusted EBITDA | 165,769 | 151,594 | 465,050 | 425,260
Restructuring Initiatives | (919) | (564) | (1,177) | (653)
Depreciation and amortization | (35,107) | (30,787) | (100,424) | (89,198)
Operating Segment | Aptar Beauty |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | 334,929 | 308,955 | 989,481 | 972,535
Cost of Sales (exclusive of depreciation and amortization): | 243,004 | 217,824 | 708,430 | 685,349
Selling, Research & Development and Administrative: | 47,746 | 45,115 | 142,896 | 142,021
Other Segment Items: | (2,731) | (301) | (6,962) | (1,697)
Adjusted EBITDA | 39,749 | 40,221 | 123,960 | 125,993
Restructuring Initiatives | (550) | (1,962) | (1,571) | (5,871)
Depreciation and amortization | (24,332) | (20,420) | (65,869) | (62,174)
Operating Segment | Aptar Closures |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | 189,732 | 187,324 | 553,931 | 547,002
Cost of Sales (exclusive of depreciation and amortization): | 135,246 | 131,737 | 390,999 | 388,160
Selling, Research & Development and Administrative: | 22,895 | 22,407 | 69,765 | 67,469
Other Segment Items: | (525) | (286) | (1,589) | (1,172)
Adjusted EBITDA | 30,337 | 31,980 | 89,480 | 86,259
Restructuring Initiatives | (702) | (877) | (2,944) | (2,530)
Depreciation and amortization | (14,921) | (14,912) | (41,943) | (42,697)
Intersegment |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | (9,186) | (7,741) | (27,137) | (27,761)
Intersegment | Aptar Pharma |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | (246) | (159) | (704) | (606)
Intersegment | Aptar Beauty |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | (7,161) | (6,096) | (21,157) | (20,869)
Intersegment | Aptar Closures |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Net Sales | (1,779) | (1,486) | (5,276) | (6,286)
Corporate & Other |  |  |  |
Financial information regarding the Company's reportable segments |  |  |  |
Adjusted EBITDA | (13,255) | (15,411) | (54,144) | (57,528)
Restructuring Initiatives | 3 | (461) | (97) | (605)
Depreciation and amortization | $ (874) | $ (896) | $ (2,549) | $ (2,263)

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