Olin Corporation
US ˙ NYSE ˙ US6806652052

SecurityOLN / Olin Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership275,287 shares
Latest Disclosed Value $ 8,184,257
Rhumbline Advisers reports 0.91% increase in ownership of OLN / Olin Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 275,287 shares of Olin Corporation (US:OLN) valued at $8,184,283 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 272,809 shares of Olin Corporation. This represents a change in shares of 0.91% during the quarter. The current value of the position is $6,862,905 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)
2026-05-12 2026-03-31 13F OLIN CORP COM COM 680665205 275,287 2,478 0.91 8,184 44.03 0.0070
2026-02-13 2025-12-31 13F OLIN CORP COM COM 680665205 272,809 -30,073 -9.93 5,683 -24.92 0.0046
2025-11-06 2025-09-30 13F OLIN CORP COM COM 680665205 302,882 13,569 4.69 7,569 30.21 0.0061
2025-08-12 2025-06-30 13F OLIN CORP COM COM 680665205 289,313 -8,687 -2.92 5,812 -19.53 0.0050
2025-05-29 2025-03-31 13F/A-1 OLIN CORP COM COM 680665205 298,000 -26,696 -8.22 7,223 -34.18 0.0068
2025-04-08 2025-03-31 13F OLIN CORP COM COM 680665205 298,000 -26,696 7,223 0.0068
2025-05-29 2024-12-31 13F/A-1 OLIN CORP COM COM 680665205 324,696 5,093 1.59 10,975 -28.43 0.0098
2025-01-30 2024-12-31 13F OLIN CORP COM COM 680665205 324,696 5,093 10,975 0.0098
2024-11-12 2024-09-30 13F OLIN CORP COM COM 680665205 319,603 -8,792 -2.68 15,335 -0.96 0.0138
2024-08-01 2024-06-30 13F OLIN CORP COM COM 680665205 328,395 -28,807 -8.06 15,484 -26.28 0.0146
2024-05-09 2024-03-31 13F OLIN CORP COM COM 680665205 357,202 -8,770 -2.40 21,003 6.38 0.0202
2024-02-08 2023-12-31 13F OLIN CORP COM COM 680665205 365,972 19,127 5.51 19,744 13.90 0.0207
2023-11-09 2023-09-30 13F OLIN CORP COM COM 680665205 346,845 2,634 0.77 17,335 -2.00 0.0201
2023-08-08 2023-06-30 13F OLIN CORP COM COM 680665205 344,211 7,560 2.25 17,689 98,172.22 0.0198
2023-05-11 2023-03-31 13F OLIN CORP COM COM 680665205 336,651 -15,343 -4.36 19 -99.90 0.0231
2023-02-14 2022-12-31 13F OLIN CORP COM COM 680665205 351,994 -10,874 -3.00 18,635 19.76 0.0251
2022-11-10 2022-09-30 13F OLIN CORP COM COM 680665205 362,868 -1,086 -0.30 15,560 -7.62 0.0232
2022-08-11 2022-06-30 13F OLIN CORP COM COM 680665205 363,954 27,627 8.21 16,844 -4.20 0.0246
2022-05-12 2022-03-31 13F OLIN CORP COM COM 680665205 336,327 -4,485 -1.32 17,583 -10.31 0.0226
2022-02-10 2021-12-31 13F OLIN CORP COM COM 680665205 340,812 -7,288 -2.09 19,604 16.72 0.0240
2021-11-12 2021-09-30 13F OLIN CORP COM COM 680665205 348,100 -12,899 -3.57 16,796 0.57 0.0227
2021-08-05 2021-06-30 13F OLIN CORP COM COM 680665205 360,999 -4,831 -1.32 16,700 20.22 0.0219
2021-05-06 2021-03-31 13F OLIN CORP COM COM 680665205 365,830 -801 -0.22 13,891 54.28 0.0189
2021-02-10 2020-12-31 13F OLIN CORP COM COM 680665205 366,631 18,909 5.44 9,004 109.15 0.0124
2020-11-12 2020-09-30 13F OLIN CORP COM COM 680665205 347,722 -44,772 -11.41 4,305 -4.55 0.0067
2020-08-13 2020-06-30 13F OLIN CORP COM COM 680665205 392,494 -14,547 -3.57 4,510 -5.05 0.0075
2020-05-06 2020-03-31 13F OLIN CORP COM COM 680665205 407,041 34,081 9.14 4,750 -26.17 0.0100
2020-02-05 2019-12-31 13F OLIN CORP COM COM 680665205 372,960 -6,794 -1.79 6,434 -9.50 0.0108
2019-10-23 2019-09-30 13F OLIN CORP COM COM 680665205 379,754 -3,145 -0.82 7,109 -15.26 0.0130
2019-08-14 2019-06-30 13F OLIN CORP COM COM 680665205 382,899 -5,758 -1.48 8,389 -6.73 0.0157
2019-05-01 2019-03-31 13F OLIN CORP COM COM 680665205 388,657 -18,997 -4.66 8,994 9.71 0.0174
2019-01-31 2018-12-31 13F OLIN CORP COM COM 680665205 407,654 121,626 42.52 8,198 11.61 0.0178
2018-11-07 2018-09-30 13F OLIN CORP COM COM 680665205 286,028 -7,548 -2.57 7,345 -12.89 0.0142
2018-08-06 2018-06-30 13F OLIN CORP COM COM 680665205 293,576 -1,836 -0.62 8,432 -6.08 0.0170
2018-05-02 2018-03-31 13F OLIN CORP COM COM 680665205 295,412 -11,569 -3.77 8,978 -17.80 0.0188
2018-02-09 2017-12-31 13F OLIN CORP COM COM 680665205 306,981 28,047 10.06 10,922 14.33 0.0222
2017-11-06 2017-09-30 13F OLIN CORP COM COM 680665205 278,934 1,259 0.45 9,553 13.62 0.0208
2017-08-02 2017-06-30 13F OLIN CORP COM COM 680665205 277,675 -32,422 -10.46 8,408 -17.51 0.0192
2017-05-02 2017-03-31 13F OLIN CORP COM COM 680665205 310,097 12,254 4.11 10,193 33.63 0.0238
2017-01-27 2016-12-31 13F OLIN CORP COM COM 680665205 297,843 -2,759 -0.92 7,628 23.67 0.0193
2016-11-08 2016-09-30 13F OLIN CORP COM COM 680665205 300,602 4,130 1.39 6,168 -16.24 0.0170
2016-08-11 2016-06-30 13F OLIN CORP COM COM 680665205 296,472 -4,535 -1.51 7,364 40.86 0.0218
2016-05-02 2016-03-31 13F OLIN CORP USD1. COM 680665205 301,007 24,506 8.86 5,228 9.56 0.0162
2016-02-03 2015-12-31 13F OLIN CORP USD1. COM 680665205 276,501 151,292 120.83 4,772 126.70 0.0154
2015-11-04 2015-09-30 13F OLIN CORP USD1. COM 680665205 125,209 -13,341 -9.63 2,105 -43.63 0.0072
2015-08-04 2015-06-30 13F OLIN CORP USD1. COM 680665205 138,550 -26,885 -16.25 3,734 -29.56 0.0119
2015-05-12 2015-03-31 13F OLIN CORP USD1. COM 680665205 165,435 25,475 18.20 5,301 66.33 0.0153
2015-02-06 2014-12-31 13F OLIN CORP USD1. COM 680665205 139,960 2,680 1.95 3,187 -8.05 0.0093
2014-11-12 2014-09-30 13F OLIN CORP USD1. COM 680665205 137,280 -1,060 -0.77 3,466 -6.93 0.0104
2014-08-06 2014-06-30 13F OLIN CORP USD1. COM 680665205 138,340 8,977 6.94 3,724 4.26 0.0109
2014-05-06 2014-03-31 13F OLIN CORP USD1. COM 680665205 129,363 -3,610 -2.71 3,572 -6.88 0.0106
2014-02-03 2013-12-31 13F OLIN CORP USD1. COM 680665205 132,973 -6,328 -4.54 3,836 19.35 0.0113
2013-11-05 2013-09-30 13F OLIN CORP USD1. COM 680665205 139,301 -5,408 -3.74 3,214 -7.14 0.0100
2013-08-07 2013-06-30 13F OLIN CORP USD1. COM 680665205 144,709 144,709 3,461 0.0111
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.