AptarGroup, Inc.
US ˙ NYSE ˙ US0383361039

SecurityATR / AptarGroup, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Sei Investments Co closes position in ATR / AptarGroup, Inc.

On May 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 0 shares of AptarGroup, Inc. (US:ATR) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 83,843 shares of AptarGroup, Inc.. This represents a change in shares of -100.00% during the quarter. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F APTARGROUP COM 038336103 0 -83,843 -100.00 0 -100.00
2026-02-13 2025-12-31 13F APTARGROUP COM 038336103 83,843 -16,807 -16.70 10,226 -23.99 0.0101
2025-11-13 2025-09-30 13F APTARGROUP COM 038336103 100,650 -23,621 -19.01 13,453 -30.80 0.0145
2025-08-14 2025-06-30 13F APTARGROUP COM 038336103 124,271 14,928 13.65 19,440 19.82 0.0225
2025-05-14 2025-03-31 13F/A-1 APTARGROUP COM 038336103 109,343 4,486 4.28 16,224 -1.51 0.0209
2025-05-13 2025-03-31 13F APTARGROUP COM 038336103 103,182 -1,675 16,168 0.0176
2025-02-11 2024-12-31 13F APTARGROUP COM 038336103 104,857 -327 -0.31 16,473 -2.23 0.0212
2024-11-12 2024-09-30 13F APTARGROUP COM 038336103 105,184 6,250 6.32 16,849 20.95 0.0219
2024-08-13 2024-06-30 13F APTARGROUP COM 038336103 98,934 3,826 4.02 13,931 1.79 0.0197
2024-05-07 2024-03-31 13F APTARGROUP COM 038336103 95,108 -4,877 -4.88 13,685 10.72 0.0201
2024-02-14 2023-12-31 13F APTARGROUP COM 038336103 99,985 -3,356 -3.25 12,360 -4.34 0.0198
2023-11-14 2023-09-30 13F APTARGROUP COM 038336103 103,341 8,671 9.16 12,922 17.81 0.0232
2023-08-11 2023-06-30 13F APTARGROUP COM 038336103 94,670 -32,819 -25.74 10,968 -27.21 0.0191
2023-05-12 2023-03-31 13F APTARGROUP COM 038336103 127,489 28,938 29.36 15,068 39.02 0.0280
2023-02-10 2022-12-31 13F APTARGROUP COM 038336103 98,551 -66,293 -40.22 10,839 -30.81 0.0241
2022-11-14 2022-09-30 13F APTARGROUP COM 038336103 164,844 -3,270 -1.95 15,665 -9.71 0.0349
2022-08-15 2022-06-30 13F APTARGROUP COM 038336103 168,114 45,317 36.90 17,350 20.24 0.0375
2022-05-13 2022-03-31 13F APTARGROUP COM 038336103 122,797 484 0.40 14,429 -3.68 0.0290
2022-02-14 2021-12-31 13F APTARGROUP COM 038336103 122,313 -5,670 -4.43 14,980 -1.89 0.0281
2021-11-12 2021-09-30 13F APTARGROUP COM 038336103 127,983 -5,962 -4.45 15,268 -19.08 0.0320
2021-08-06 2021-06-30 13F APTARGROUP COM 038336103 133,945 -3,524 -2.56 18,868 -2.71 0.0418
2021-05-12 2021-03-31 13F APTARGROUP COM 038336103 137,469 8,347 6.46 19,394 9.73 0.0489
2021-02-08 2020-12-31 13F APTARGROUP COM 038336103 129,122 -1,677 -1.28 17,675 19.72 0.0457
2020-12-04 2020-09-30 13F/A-1 APTARGROUP COM 038336103 130,799 -10,480 -7.42 14,763 -6.49 0.0427
2020-11-06 2020-09-30 13F APTARGROUP COM 038336103 131,888 -9,391 14,886 35,842.1783
2020-08-17 2020-06-30 13F/A-1 APTARGROUP COM 038336103 141,279 21,230 17.68 15,787 32.40 0.0490
2020-08-11 2020-06-30 13F APTARGROUP COM 038336103 105,206 -14,843 12,063 32,721.5296
2020-05-14 2020-03-31 13F APTARGROUP COM 038336103 120,049 17,372 16.92 11,924 0.36 0.0438
2020-02-06 2019-12-31 13F APTARGROUP COM 038336103 102,677 -18,162 -15.03 11,881 -16.89 0.0354
2019-11-12 2019-09-30 13F APTARGROUP COM 038336103 120,839 3,809 3.25 14,296 -1.76 0.0366
2019-08-14 2019-06-30 13F APTARGROUP COM 038336103 117,030 -8,001 -6.40 14,552 9.40 0.0475
2019-05-15 2019-03-31 13F APTARGROUP COM 038336103 125,031 -50,268 -28.68 13,302 -29.11 0.0447
2019-02-13 2018-12-31 13F APTARGROUP COM 038336103 175,299 7,606 4.54 18,765 3.75 0.0668
2018-11-08 2018-09-30 13F APTARGROUP COM 038336103 167,693 4,931 3.03 18,086 18.99 0.0656
2018-08-03 2018-06-30 13F APTARGROUP COM 038336103 162,762 160,361 6,678.93 15,199 6,936.57 0.0517
2018-05-11 2018-03-31 13F APTARGROUP COM 038336103 2,401 -213,941 -98.89 216 -98.84 0.0008
2018-02-08 2017-12-31 13F APTARGROUP COM 038336103 216,342 -3,309 -1.51 18,576 -9.72 0.0645
2017-11-06 2017-09-30 13F APTARGROUP COM 038336103 219,651 -16,458 -6.97 20,575 0.33 0.0731
2017-07-31 2017-06-30 13F APTARGROUP COM 038336103 236,109 -14,349 -5.73 20,508 6.35 0.0818
2017-05-05 2017-03-31 13F APTARGROUP COM 038336103 250,458 92,842 58.90 19,283 67.26 0.0845
2017-02-02 2016-12-31 13F APTARGROUP COM 038336103 157,616 44,300 39.09 11,529 31.43 0.0558
2016-11-04 2016-09-30 13F APTARGROUP COM 038336103 113,316 1,890 1.70 8,772 -0.51 0.0446
2016-08-11 2016-06-30 13F APTARGROUP COM 038336103 111,426 6,346 6.04 8,817 7.00 0.0529
2016-05-10 2016-03-31 13F/A-1 APTARGROUP COM 038336103 105,080 -7,080 -6.31 8,240 1.13 0.0513
2016-02-03 2015-12-31 13F APTARGROUP COM 038336103 112,160 86,990 345.61 8,148 390.55 0.0497
2015-11-02 2015-09-30 13F/A-1 APTARGROUP COM 038336103 25,170 14,686 140.08 1,661 148.28 0.0152
2015-10-30 2015-09-30 13F APTARGROUP COM 038336103 25,170 1,661
2015-08-07 2015-06-30 13F/A-1 APTARGROUP COM 038336103 10,484 410 4.07 669 4.69 0.0060
2015-08-04 2015-06-30 13F APTARGROUP COM 038336103 10,484 410 669 0.0060
2015-05-14 2015-03-31 13F/A-1 APTARGROUP COM 038336103 10,074 -304 -2.93 639 -7.79 0.0055
2015-05-01 2015-03-31 13F APTARGROUP COM 038336103 10,074 639
2015-02-10 2014-12-31 13F APTARGROUP COM 038336103 10,378 10,378 693 0.0061
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.