SEC Form 4
Olin Corp. (OLN) insider trading
In the 12 months to Oct 24, 2026, 5 OLN insiders reported open-market sales of $2.5M across 5 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $2.5M
- 5 filings · 5 insiders
- Open-market purchases
- $0
- 0 filings
Who traded OLN, and when
- Sale
OLN daily close from Oct 24, 2025 to Oct 23, 2026, between $14.71 and $30.14, last $15.66. 5 sale and 0 purchase filings by 5 insiders, marked at their filing dates. Todd A. Slater, VP & CFO: sold $2.1M across 1 filing, first filed Feb 5, 2026, last Feb 5, 2026. Deon Carter, VP & President CAPV: sold $154.2K across 1 filing, first filed Feb 25, 2026, last Feb 25, 2026. R. Nichole Sumner, VP & Controller: sold $106.8K across 1 filing, first filed Feb 5, 2026, last Feb 5, 2026. Teresa M. Vermillion, VP & Treasurer: sold $93.9K across 1 filing, first filed Nov 28, 2025, last Nov 28, 2025. Angela M. Castle, VP & Chief Legal Officer: sold $57.7K across 1 filing, first filed Feb 24, 2026, last Feb 24, 2026.
Largest mark · tap a row for others
Todd A. Slater · VP & CFO
Sale $2,073,918
92,250 shares at $22.48 avg
Filed Feb 5, 2026 · traded Feb 3
Close on filing date $23.41
Todd A. Slater · VP & CFO
VP & CFO
$2.1M soldDeon Carter · VP & President CAPV
VP & President CAPV
$154.2K soldR. Nichole Sumner · VP & Controller
VP & Controller
$106.8K soldTeresa M. Vermillion · VP & Treasurer
VP & Treasurer
$93.9K soldAngela M. Castle · VP & Chief Legal Officer
VP & Chief Legal Officer
$57.7K soldHas Olin Corp.'s CEO sold stock?
No. Kenneth Todd Lane (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
5 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Todd A. Slater | VP & CFO | $2.1M | — | 1 | — | |
| Deon Carter | VP & President CAPV | $154.2K | — | 1 | — | |
| R. Nichole Sumner | VP & Controller | $106.8K | — | 1 | — | |
| Teresa M. Vermillion | VP & Treasurer | $93.9K | — | 1 | — | |
| Angela M. Castle | VP & Chief Legal Officer | $57.7K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Deon Carter VP & President CAPV | Sale | 6,500 | $23.73 | $154.2K | 357 | |
traded | Angela M. Castle VP & Chief Legal Officer | Sale | 2,379 | $24.25 | $57.7K | 1,528 | |
traded | Todd A. Slater VP & CFO | Sale | 92,250 | $22.48 | $2.1M | 44,291 | |
traded | R. Nichole Sumner VP & Controller | Sale | 4,750 | $22.49 | $106.8K | 24,771 | |
traded | Teresa M. Vermillion VP & Treasurer | Sale | 4,500 | $20.86 | $93.9K | 17,199 |
GET /stocks/filings/vX/form-4?tickers=OLN&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"OLN"
],
"issuer_cik": "0000074303",
"owner_cik": "0002025908",
"accession_number": "0002025908-26-000009",
"form_type": "4",
"filing_date": "2026-02-25",
"period_of_report": "2026-02-25",
"issuer_name": "OLIN Corp",
"issuer_trading_symbol": "OLN",
"owner_name": "Carter Deon",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "VP & President CAPV",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-02-25",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 6500,
"transaction_price_per_share": 23.727,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 357,
"transaction_value": 154225.5,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.71 to $23.743, inclusive. The reporting person undertakes to provide to Olin Corporation, any security holder of Olin Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote 1 to this Form 1."
}
]
},
{
"tickers": [
"OLN"
],
"issuer_cik": "0000074303",
"owner_cik": "0002058796",
"accession_number": "0002058796-26-000006",
"form_type": "4",
"filing_date": "2026-02-24",
"period_of_report": "2026-02-20",
"issuer_name": "OLIN Corp",
"issuer_trading_symbol": "OLN",
"owner_name": "Castle Angela M",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "VP & Chief Legal Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-02-24",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 2379.2625,
"transaction_price_per_share": 24.2512,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 1527.7375,
"transaction_value": 57699.97074,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F2",
"description": "The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.22 to $24.3415, inclusive. The reporting person undertakes to provide to Olin Corporation, any security holder of Olin Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote 2 to this Form 4."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 36 records
- Option exercises17 records
- Tax withholding13 records
- Grants and awards6 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for OLN every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.