Organon & Co.
US ˙ NYSE

SecurityOGN / Organon & Co.
InstitutionAtlantic Trust, LLC
Latest Disclosed Ownership23 shares
Latest Disclosed Value $ 138
Atlantic Trust, LLC reports 72.94% decrease in ownership of OGN / Organon & Co.

On May 6, 2026 - Atlantic Trust, LLC filed a 13F-HR form disclosing ownership of 23 shares of Organon & Co. (US:OGN) valued at $138 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 85 shares of Organon & Co.. The current value of the position is $308 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)
2026-05-06 2026-03-31 13F Organon Com 68622V106 23 -62 -72.94 0 0.0000
2026-02-09 2025-12-31 13F ORGANON COMMON STOCK 68622V106 85 -43 -33.59 1 -100.00 0.0001
2025-11-10 2025-09-30 13F ORGANON COMMON STOCK 68622V106 128 -633 -83.18 1 -85.71 0.0002
2025-08-08 2025-06-30 13F ORGANON COMMON STOCK 68622V106 761 553 265.87 7 133.33 0.0014
2025-05-09 2025-03-31 13F Organon Com 68622V106 208 170 447.37 3 0.0007
2025-02-10 2024-12-31 13F ORGANON COMMON STOCK 68622V106 38 23 153.33 1 0.0001
2024-11-13 2024-09-30 13F ORGANON COMMON STOCK 68622V106 15 0 0.00 0 0.0001
2024-08-09 2024-06-30 13F ORGANON COMMON STOCK 68622V106 15 0 0.00 0 0.0001
2024-05-10 2024-03-31 13F ORGANON COMMON STOCK 68622V106 15 -17 -53.12 0 0.0001
2024-02-06 2023-12-31 13F ORGANON COMMON STOCK 68622V106 32 -103 -76.30 0 -100.00 0.0001
2023-11-13 2023-09-30 13F ORGANON COMMON STOCK 68622V106 135 0 0.00 2 0.00 0.0008
2023-08-08 2023-06-30 13F ORGANON COMMON STOCK 68622V106 135 -14 -9.40 3 -33.33 0.0009
2023-05-10 2023-03-31 13F ORGANON COM 68622V106 149 -273 -64.69 4 0.0011
2023-02-01 2022-12-31 13F ORGANON COMMON STOCK 68622V106 422 -268 -38.84 0 -100.00 0.0040
2022-11-14 2022-09-30 13F ORGANON COM 68622V106 690 690 16 0.0056
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.