SEC Form 4
BlackLine, Inc. (BL) insider trading
In the 12 months to Oct 24, 2026, 5 BL insiders reported open-market sales of $2.5M across 7 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $2.5M
- 7 filings · 5 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 2 of 7
- $99.6K of $2.5M sold (4%)
Who traded BL, and when
- Sale
- Sale, pre-arranged (10b5-1)
BL daily close from Oct 24, 2025 to Oct 23, 2026, between $25.23 and $58.83, last $34.80. 7 sale and 0 purchase filings by 5 insiders, marked at their filing dates. Therese Tucker, Director: sold $2.2M across 1 filing, first filed Aug 26, 2026, last Aug 26, 2026. Mika Yamamoto, Director: sold $85.4K across 1 filing, first filed Jun 8, 2026, last Jun 8, 2026. Michelle D. Stalick, Chief Accounting Officer: sold $64.3K across 3 filings, first filed May 20, 2026, last Aug 28, 2026. Thomas Unterman, Director: sold $50.1K across 1 filing, first filed Oct 28, 2025, last Oct 28, 2025. Gregory Hughes, Director: sold $49.5K across 1 filing, first filed May 22, 2026, last May 22, 2026.
Largest mark · tap a row for others
Therese Tucker · Director
Sale $2,236,990
70,000 shares at $31.96 avg
Filed Aug 26, 2026 · traded Aug 24
Close on filing date $31.32
Therese Tucker · Director
Director
$2.2M soldMika Yamamoto · Director
Director
$85.4K soldMichelle D. Stalick · Chief Accounting Officer
Chief Accounting Officer
$64.3K soldThomas Unterman · Director
Director
$50.1K soldGregory Hughes · Director
Director
$49.5K soldHas BlackLine, Inc.'s CEO sold stock?
No. Owen Ryan (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
7 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Therese Tucker | Director | $2.2M | — | 1 | — | |
| Mika Yamamoto | Director | $85.4K | — | 1 | — | |
| Michelle D. Stalick | Chief Accounting Officer | $64.3K | — | 3 | — | |
| Thomas Unterman | Director | $50.1K | — | 1 | 100% of sales | |
| Gregory Hughes | Director | $49.5K | — | 1 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Michelle D. Stalick Chief Accounting Officer | Sale | 780 | $33.65 | $26.2K | 34,712 | |
traded | Therese Tucker Director | Sale | 70,000 | $31.96 | $2.2M | 381,557 | |
traded | Mika Yamamoto Director | Sale | 3,000 | $28.48 | $85.4K | 16,692 | |
traded | Michelle D. Stalick Chief Accounting Officer | Sale | 780 | $30.93 | $24.1K | 36,363 | |
traded | Gregory Hughes Director | SalePre-arranged (10b5-1) | 1,637 | $30.25 | $49.5K | 7,755 | |
traded | Michelle D. Stalick Chief Accounting Officer | Sale | 459 | $30.26 | $13.9K | 38,014 | |
traded | Thomas Unterman Director | SalePre-arranged (10b5-1) | 910 | $55.00 | $50.1K | 41,835 |
GET /stocks/filings/vX/form-4?tickers=BL&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"BL"
],
"issuer_cik": "0001666134",
"owner_cik": "0001603300",
"accession_number": "0001666134-26-000102",
"form_type": "4",
"filing_date": "2026-08-28",
"period_of_report": "2026-08-27",
"issuer_name": "BLACKLINE, INC.",
"issuer_trading_symbol": "BL",
"owner_name": "Stalick Michelle D",
"is_officer": true,
"officer_title": "Chief Accounting Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-27",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 780,
"transaction_price_per_share": 33.65,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 34712,
"transaction_value": 26247,
"direct_or_indirect": "D"
},
{
"tickers": [
"BL"
],
"issuer_cik": "0001666134",
"owner_cik": "0001688365",
"accession_number": "0001666134-26-000100",
"form_type": "4",
"filing_date": "2026-08-26",
"period_of_report": "2026-08-24",
"issuer_name": "BLACKLINE, INC.",
"issuer_trading_symbol": "BL",
"owner_name": "Tucker Therese",
"is_director": true,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-24",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 70000,
"transaction_price_per_share": 31.957,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 381557,
"transaction_value": 2236990,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sale price represents the weighted-average price of shares sold ranging from $31.78 to $32.14 per share, and is rounded to the nearest tenth of a cent. Upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the range set forth in 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) · 115 records
- Option exercises21 records
- Tax withholding66 records
- Grants and awards23 records
- Gifts5 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 BL 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.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.