SEC Form 4
Bain Capital Specialty Finance, Inc. (BCSF) insider trading
In the 12 months to Oct 26, 2026, one BCSF insider reported open-market purchases of $28.9K across 1 filing; no open-market sales were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $0
- 0 filings · 0 insiders
- Open-market purchases
- $28.9K
- 1 filing · Sabrina Rusnak-Carlson, General Counsel
Who traded BCSF, and when
- Purchase
BCSF daily close from Oct 27, 2025 to Oct 26, 2026, between $10.05 and $14.60, last $10.05. 0 sale and 1 purchase filings by 1 insider, marked at their filing dates. Sabrina Rusnak-Carlson, General Counsel: bought $28.9K across 1 filing, first filed Mar 3, 2026, last Mar 3, 2026.
Largest mark · tap a row for others
Sabrina Rusnak-Carlson · General Counsel
Purchase $28,865
2,300 shares at $12.55 avg
Filed Mar 3, 2026
Close on filing date $12.56
Sabrina Rusnak-Carlson · General Counsel
General Counsel
$28.9K boughtOpen-market trades
1 filing in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Sabrina Rusnak-Carlson | General Counsel | — | $28.9K | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Sabrina Rusnak-Carlson General Counsel | Purchase | 2,300 | $12.55 | $28.9K | 9,560 |
GET /stocks/filings/vX/form-4?tickers=BCSF&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"BCSF"
],
"issuer_cik": "0001655050",
"owner_cik": "0001669006",
"accession_number": "0001669006-26-000001",
"form_type": "4",
"filing_date": "2026-03-03",
"period_of_report": "2026-03-03",
"issuer_name": "Bain Capital Specialty Finance, Inc.",
"issuer_trading_symbol": "BCSF",
"owner_name": "Rusnak-Carlson Sabrina",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "General Counsel",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-03-03",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 2300,
"transaction_price_per_share": 12.55,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 9560,
"transaction_value": 28865,
"not_subject_to_section_16": false,
"direct_or_indirect": "D"
}
]
}
// trimmed to 1 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
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.
Frequently asked questions
How current is BCSF’s insider data?
These are BCSF Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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Track BCSF insider trades with your agent
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 BCSF 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.
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