Olin Corporation
US ˙ NYSE ˙ US6806652052

SecurityOLN / Olin Corporation
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership13,682 shares
Latest Disclosed Value $ 406,825
Advisor Group Holdings, Inc. reports 23.80% increase in ownership of OLN / Olin Corporation

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 13,682 shares of Olin Corporation (US:OLN) valued at $406,766 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 11,052 shares of Olin Corporation. This represents a change in shares of 23.80% during the quarter. The current value of the position is $341,092 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)
2026-05-15 2026-03-31 13F OLIN COM PAR $1 680665205 13,682 2,630 23.80 407 76.52 0.0003
2026-02-17 2025-12-31 13F OLIN COM PAR $1 680665205 11,052 403 3.78 230 -9.09 0.0003
2025-11-14 2025-09-30 13F OLIN COM PAR $1 680665205 10,649 -71 -0.66 254 17.67 0.0004
2025-09-04 2025-06-30 13F/A-1 OLIN COM PAR $1 680665205 10,720 -1,254 -10.47 215 -25.86 0.0004
2025-08-13 2025-06-30 13F OLIN COM PAR $1 680665205 12,547 573 416 0.0005
2025-05-12 2025-03-31 13F OLIN COM PAR $1 680665205 11,974 -3,801 -24.10 290 -45.59 0.0006
2025-06-06 2024-12-31 13F/A-1 OLIN COM PAR $1 680665205 15,775 115 0.73 533 -29.03 0.0012
2025-02-07 2024-12-31 13F OLIN COM PAR $1 680665205 16,286 626 727 0.0019
2024-11-13 2024-09-30 13F OLIN COM PAR $1 680665205 15,660 -6,588 -29.61 752 -28.41 0.0017
2024-08-13 2024-06-30 13F OLIN COM PAR $1 680665205 22,248 2,886 14.91 1,049 -7.82 0.0025
2024-05-10 2024-03-31 13F OLIN COM PAR $1 680665205 19,362 -8,246 -29.87 1,139 -23.57 0.0025
2024-02-12 2023-12-31 13F OLIN COM PAR $1 680665205 27,608 -3,332 -10.77 1,490 -3.69 0.0026
2023-11-13 2023-09-30 13F OLIN COM PAR $1 680665205 30,940 2,636 9.31 1,547 6.33 0.0023
2023-08-21 2023-06-30 13F/A-1 OLIN COM PAR $1 680665205 28,304 -26,121 -47.99 1,455 -51.87 0.0026
2023-08-10 2023-06-30 13F OLIN COM PAR $1 680665205 28,304 -26,121 1,455 0.0004
2023-05-12 2023-03-31 13F OLIN COM PAR $1 680665205 54,425 -6,807 -11.12 3,021 -6.79 0.0057
2023-02-10 2022-12-31 13F OLIN COM PAR $1 680665205 61,232 -323 -0.52 3,241 22.81 0.0066
2022-11-14 2022-09-30 13F OLIN COM PAR $1 680665205 61,555 -17,068 -21.71 2,639 -27.46 0.0060
2022-08-10 2022-06-30 13F OLIN COM PAR $1 680665205 78,623 -252 -0.32 3,638 -14.14 0.0080
2022-05-04 2022-03-31 13F OLIN COM PAR $1 680665205 78,875 -2,441 -3.00 4,237 -9.43 0.0082
2022-02-03 2021-12-31 13F OLIN COM PAR $1 680665205 81,316 33,672 70.67 4,678 103.48 0.0089
2021-11-05 2021-09-30 13F OLIN COM PAR $1 680665205 47,644 5,304 12.53 2,299 17.30 0.0048
2021-08-02 2021-06-30 13F OLIN COM PAR $1 680665205 42,340 -14,311 -25.26 1,960 -8.88 0.0042
2021-05-13 2021-03-31 13F OLIN COM PAR $1 680665205 56,651 18,580 48.80 2,151 130.30 0.0052
2021-02-10 2020-12-31 13F OLIN COM PAR $1 680665205 38,071 -8,811 -18.79 934 60.76 0.0025
2020-11-12 2020-09-30 13F OLIN COM PAR $1 680665205 46,882 19,147 69.04 581 82.70 0.0017
2020-08-14 2020-06-30 13F OLIN COM PAR $1 680665205 27,735 2,919 11.76 318 12.77 0.0011
2020-05-18 2020-03-31 13F OLIN COM PAR $1 680665205 24,816 24,816 282 0.0012
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.