Organon & Co.
US ˙ NYSE

SecurityOGN / Organon & Co.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership393,125 shares
Latest Disclosed Value $ 2,354,819
Walleye Capital LLC ownership in OGN / Organon & Co.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 393,125 shares of Organon & Co. (US:OGN) valued at $2,354,819 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,485,379 shares of Organon & Co.. This represents a change in shares of -73.53% during the quarter. The current value of the position is $5,252,150 USD.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (OGN) in the form of stock options. The firm currently holds call options representing 195,500 of underlying shares valued at $1,171,045 USD and put options representing 57,100 of underlying shares valued at $342,029 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

OGN / Organon & Co. Historical Put/Call Ratio
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/A-1 ORGANON COMMON STOCK 68622V106 393,125 -1,092,254 -73.53 2,355 -77.90 0.0098
2026-05-08 2026-03-31 13F ORGANON COMMON STOCK 68622V106 393,125 -1,092,254 2,355 0.0098
2026-02-13 2025-12-31 13F ORGANON COMMON STOCK 68622V106 1,485,379 1,432,903 2,730.59 10,650 1,801.79 0.0327
2025-11-14 2025-09-30 13F ORGANON COMMON STOCK 68622V106 52,476 52,476 560 0.0021
2025-08-13 2025-06-30 13F ORGANON COMMON STOCK 68622V106 0 -23,127 -100.00 0 -100.00
2025-05-14 2025-03-31 13F ORGANON COMMON STOCK 68622V106 23,127 -52,309 -69.34 344 -69.42 0.0016
2025-02-13 2024-12-31 13F ORGANON COMMON STOCK 68622V106 75,436 2,829 3.90 1,126 -18.95 0.0028
2024-11-14 2024-09-30 13F ORGANON COMMON STOCK 68622V106 72,607 5,714 8.54 1,389 0.29 0.0029
2024-08-14 2024-06-30 13F ORGANON COMMON STOCK 68622V106 66,893 66,893 1,385 0.0025
2024-05-15 2024-03-31 13F ORGANON COMMON STOCK 68622V106 0 -72,551 -100.00 0 -100.00
2024-02-14 2023-12-31 13F ORGANON COMMON STOCK 68622V106 72,551 22,743 45.66 1,046 21.06 0.0022
2023-11-21 2023-09-30 13F/A-1 ORGANON COMMON STOCK 68622V106 49,808 11,068 28.57 865 7.20 0.0022
2023-11-14 2023-09-30 13F ORGANON COMMON STOCK 68622V106 49,808 11,068 865 0.0022
2023-08-14 2023-06-30 13F ORGANON COMMON STOCK 68622V106 38,740 15,230 64.78 806 46.01 0.0029
2023-05-15 2023-03-31 13F ORGANON COMMON STOCK 68622V106 23,510 23,510 553 0.0083
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F/A ORGANON COMMON STOCK Call 195,500 -46.36 1,171 -55.19 n/a n/a n/a
2026-05-08 2026-03-31 13F ORGANON COMMON STOCK Call 195,500 1,171 n/a n/a n/a
2026-02-13 2025-12-31 13F ORGANON COMMON STOCK Call 364,500 139.33 2,613 60.70 n/a n/a n/a
2025-11-14 2025-09-30 13F ORGANON COMMON STOCK Call 152,300 -24.94 1,627 -17.21 n/a n/a n/a
2025-08-13 2025-06-30 13F ORGANON COMMON STOCK Call 202,900 66.72 1,964 8.39 n/a n/a n/a
2025-05-14 2025-03-31 13F ORGANON COMMON STOCK Call 121,700 120.87 1,812 120.44 n/a n/a n/a
2025-02-13 2024-12-31 13F ORGANON COMMON STOCK Call 55,100 -25.03 822 -41.54 n/a n/a n/a
2024-11-14 2024-09-30 13F ORGANON COMMON STOCK Call 73,500 -0.14 1,406 -7.68 n/a n/a n/a
2024-08-14 2024-06-30 13F ORGANON COMMON STOCK Call 73,600 -28.33 1,524 -21.09 n/a n/a n/a
2024-05-15 2024-03-31 13F ORGANON COMMON STOCK Call 102,700 14.62 1,931 49.38 n/a n/a n/a
2024-02-14 2023-12-31 13F ORGANON COMMON STOCK Call 89,600 470.70 1,292 375.00 n/a n/a n/a
2023-11-21 2023-09-30 13F/A ORGANON COMMON STOCK Call 15,700 -18.23 273 -31.83 n/a n/a n/a
2023-11-14 2023-09-30 13F ORGANON COMMON STOCK Call 15,700 273 n/a n/a n/a
2023-08-14 2023-06-30 13F ORGANON COMMON STOCK Call 19,200 76.15 400 55.86 n/a n/a n/a
2023-05-15 2023-03-31 13F ORGANON COMMON STOCK Call 10,900 5.83 256 -10.80 n/a n/a n/a
2023-02-14 2022-12-31 13F ORGANON COMMON STOCK Call 10,300 -10.43 288 6.69 n/a n/a n/a
2022-11-14 2022-09-30 13F ORGANON COMMON STOCK Call 11,500 269 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F/A ORGANON COMMON STOCK Put 57,100 -38.60 342 -48.65 n/a n/a n/a
2026-05-08 2026-03-31 13F ORGANON COMMON STOCK Put 57,100 342 n/a n/a n/a
2026-02-13 2025-12-31 13F ORGANON COMMON STOCK Put 93,000 61.74 667 8.47 n/a n/a n/a
2025-11-14 2025-09-30 13F ORGANON COMMON STOCK Put 57,500 34.66 614 48.67 n/a n/a n/a
2025-08-13 2025-06-30 13F ORGANON COMMON STOCK Put 42,700 -64.39 413 -76.86 n/a n/a n/a
2025-05-14 2025-03-31 13F ORGANON COMMON STOCK Put 119,900 253.69 1,785 253.47 n/a n/a n/a
2025-02-13 2024-12-31 13F ORGANON COMMON STOCK Put 33,900 -77.90 506 -82.79 n/a n/a n/a
2024-11-14 2024-09-30 13F ORGANON COMMON STOCK Put 153,400 -20.93 2,935 -26.92 n/a n/a n/a
2024-08-14 2024-06-30 13F ORGANON COMMON STOCK Put 194,000 -12.26 4,016 -3.39 n/a n/a n/a
2024-05-15 2024-03-31 13F ORGANON COMMON STOCK Put 221,100 1,069.84 4,157 1,427.94 n/a n/a n/a
2024-02-14 2023-12-31 13F ORGANON COMMON STOCK Put 18,900 75.00 273 45.45 n/a n/a n/a
2023-11-21 2023-09-30 13F/A ORGANON COMMON STOCK Put 10,800 11.34 187 -6.97 n/a n/a n/a
2023-11-14 2023-09-30 13F ORGANON COMMON STOCK Put 10,800 187 n/a n/a n/a
2023-08-14 2023-06-30 13F ORGANON COMMON STOCK Put 9,700 31.08 202 15.52 n/a n/a n/a
2023-05-15 2023-03-31 13F ORGANON COMMON STOCK Put 7,400 25.42 174 6.10 n/a n/a n/a
2023-02-14 2022-12-31 13F ORGANON COMMON STOCK Put 5,900 165 n/a n/a n/a
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.