Olin Corporation
US ˙ NYSE ˙ US6806652052

SecurityOLN / Olin Corporation
InstitutionWalleye Capital LLC
Latest Disclosed Ownership201,569 shares
Latest Disclosed Value $ 5,992,646
Walleye Capital LLC ownership in OLN / Olin Corporation

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 201,569 shares of Olin Corporation (US:OLN) valued at $5,992,646 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 338,531 shares of Olin Corporation. This represents a change in shares of -40.46% during the quarter. The current value of the position is $5,192,417 USD.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (OLN) in the form of stock options. The firm currently holds call options representing 82,700 of underlying shares valued at $2,458,671 USD and put options representing 42,800 of underlying shares valued at $1,272,444 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.

OLN / Olin Corporation 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 OLIN COM PAR $1 680665205 201,569 -136,962 -40.46 5,993 -15.02 0.0249
2026-05-08 2026-03-31 13F OLIN COM PAR $1 680665205 201,569 -136,962 5,993 0.0249
2026-02-13 2025-12-31 13F OLIN COM PAR $1 680665205 338,531 67,028 24.69 7,052 3.94 0.0216
2025-11-14 2025-09-30 13F OLIN COM PAR $1 680665205 271,503 -304,187 -52.84 6,785 -41.34 0.0255
2025-08-13 2025-06-30 13F OLIN COM PAR $1 680665205 575,690 575,020 85,823.88 11,566 72,181.25 0.0449
2025-05-14 2025-03-31 13F OLIN COM PAR $1 680665205 670 -4,030 -85.74 16 -89.87 0.0001
2025-02-13 2024-12-31 13F OLIN COM PAR $1 680665205 4,700 4,700 159 0.0004
2024-11-14 2024-09-30 13F OLIN COM PAR $1 680665205 0 -70,542 -100.00 0 -100.00
2024-08-14 2024-06-30 13F OLIN COM PAR $1 680665205 70,542 66,157 1,508.71 3,326 1,194.16 0.0059
2024-05-15 2024-03-31 13F OLIN COM PAR $1 680665205 4,385 4,385 258 0.0005
2023-11-21 2023-09-30 13F/A-1 OLIN COM PAR $1 680665205 0 -55,818 -100.00 0 -100.00
2023-11-14 2023-09-30 13F OLIN COM PAR $1 680665205 0 -55,818 0
2023-08-14 2023-06-30 13F OLIN COM PAR $1 680665205 55,818 535 0.97 2,868 -6.52 0.0104
2023-05-15 2023-03-31 13F OLIN COM PAR $1 680665205 55,283 -16,491 -22.98 3,068 -19.24 0.0460
2023-02-14 2022-12-31 13F OLIN COM PAR $1 680665205 71,774 11,828 19.73 3,800 47.82 0.0693
2022-11-14 2022-09-30 13F OLIN COM PAR $1 680665205 59,946 59,946 2,570 0.0490
2022-08-19 2022-06-30 13F/A-1 OLIN COM PAR $1 680665205 0 -26,760 -100.00 0 -100.00
2022-08-08 2022-06-30 13F OLIN COM PAR $1 680665205 0 -26,760 0
2022-05-27 2022-03-31 13F/A-01 OLIN COM PAR $1 680665205 26,760 14,421 116.87 1,399 97.04 0.0374
2022-05-16 2022-03-31 13F OLIN COM PAR $1 680665205 26,760 14,421 1,399 0.0285
2022-05-27 2021-12-31 13F/A-01 OLIN COM PAR $1 680665205 12,339 12,339 710 0.0221
2022-03-03 2021-12-31 13F OLIN COM PAR $1 680665205 12,339 12,339 710 0.0177
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 OLIN COM PAR $1 Call 82,700 -15.44 2,459 20.67 n/a n/a n/a
2026-05-08 2026-03-31 13F OLIN COM PAR $1 Call 82,700 2,459 n/a n/a n/a
2026-02-13 2025-12-31 13F OLIN COM PAR $1 Call 97,800 81.45 2,037 51.34 n/a n/a n/a
2025-11-14 2025-09-30 13F OLIN COM PAR $1 Call 53,900 18.72 1,347 47.59 n/a n/a n/a
2025-08-13 2025-06-30 13F OLIN COM PAR $1 Call 45,400 577.61 912 462.96 n/a n/a n/a
2025-05-14 2025-03-31 13F OLIN COM PAR $1 Call 6,700 -82.69 162 -87.61 n/a n/a n/a
2025-02-13 2024-12-31 13F OLIN COM PAR $1 Call 38,700 -62.10 1,308 -73.30 n/a n/a n/a
2024-11-14 2024-09-30 13F OLIN COM PAR $1 Call 102,100 38.16 4,899 40.59 n/a n/a n/a
2024-08-14 2024-06-30 13F OLIN COM PAR $1 Call 73,900 -2.76 3,484 -22.02 n/a n/a n/a
2024-05-15 2024-03-31 13F OLIN COM PAR $1 Call 76,000 23.38 4,469 34.46 n/a n/a n/a
2024-02-14 2023-12-31 13F OLIN COM PAR $1 Call 61,600 366.67 3,323 404.25 n/a n/a n/a
2023-11-21 2023-09-30 13F/A OLIN COM PAR $1 Call 13,200 300.00 660 289.94 n/a n/a n/a
2023-11-14 2023-09-30 13F OLIN COM PAR $1 Call 13,200 660 n/a n/a n/a
2023-08-14 2023-06-30 13F OLIN COM PAR $1 Call 3,300 3,200.00 170 3,280.00 n/a n/a n/a
2023-05-15 2023-03-31 13F OLIN COM PAR $1 Call 100 6 n/a n/a n/a
2023-02-14 2022-12-31 13F OLIN COM PAR $1 Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F OLIN COM PAR $1 Call 400 17 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 OLIN COM PAR $1 Put 42,800 -67.35 1,272 -53.41 n/a n/a n/a
2026-05-08 2026-03-31 13F OLIN COM PAR $1 Put 42,800 1,272 n/a n/a n/a
2026-02-13 2025-12-31 13F OLIN COM PAR $1 Put 131,100 177.75 2,731 131.55 n/a n/a n/a
2025-11-14 2025-09-30 13F OLIN COM PAR $1 Put 47,200 2.16 1,180 27.05 n/a n/a n/a
2025-08-13 2025-06-30 13F OLIN COM PAR $1 Put 46,200 755.56 928 613.85 n/a n/a n/a
2025-05-14 2025-03-31 13F OLIN COM PAR $1 Put 5,400 -32.50 131 -51.85 n/a n/a n/a
2025-02-13 2024-12-31 13F OLIN COM PAR $1 Put 8,000 -16.67 270 -41.30 n/a n/a n/a
2024-11-14 2024-09-30 13F OLIN COM PAR $1 Put 9,600 -89.24 461 -89.06 n/a n/a n/a
2024-08-14 2024-06-30 13F OLIN COM PAR $1 Put 89,200 -5.01 4,206 -23.84 n/a n/a n/a
2024-05-15 2024-03-31 13F OLIN COM PAR $1 Put 93,900 595.56 5,521 658.38 n/a n/a n/a
2024-02-14 2023-12-31 13F OLIN COM PAR $1 Put 13,500 3,275.00 728 3,731.58 n/a n/a n/a
2023-11-21 2023-09-30 13F/A OLIN COM PAR $1 Put 400 20 n/a n/a n/a
2023-11-14 2023-09-30 13F OLIN COM PAR $1 Put 400 20 n/a n/a n/a
2023-08-14 2023-06-30 13F OLIN COM PAR $1 Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-15 2023-03-31 13F OLIN COM PAR $1 Put 3,600 -32.08 200 -28.93 n/a n/a n/a
2023-02-14 2022-12-31 13F OLIN COM PAR $1 Put 5,300 -18.46 281 0.36 n/a n/a n/a
2022-11-14 2022-09-30 13F OLIN COM PAR $1 Put 6,500 279 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.