BLACKLINE, INC. Insider Trading Activity
Every SEC Form 4 insider transaction reported for BLACKLINE, INC. (BL), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are BL insiders buying or selling?
In the last 12 months, BLACKLINE, INC. insiders reported 0 open-market purchases ($0) and 7 sales ($2.5M) — net selling of $2.5M. Since February 2018, Trabud has recorded 240 Form 4 filings for BL: 5 buys ($1.1M) and 235 sells ($1.1B).
Source: SEC EDGAR Form 4
What stands out
- No BLACKLINE, INC. insider made an open-market purchase in the last 12 months; the 7 reported open-market sales totaled $2.5M.
Key Statistics (February 2018 – Aug 28, 2026)
Total Form 4 filings
240
SEC EDGAR
Insider filers
22
Insider buys (5)
$1.1M
Insider sells (235)
$1.1B
Insider sentiment
Net sellingNet insider flow of $1.1B in net selling since February 2018, and $2.5M in net selling over the last 12 months.
Recent BL insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Aug 28, 2026 | Michelle D Stalick | Chief Accounting Officer | Sale | 780 | $33.65 | $26.2K | SEC ↗ |
| Aug 26, 2026 | Therese Tucker | Director | Sale | 70.0K | $31.96 | $2.2M | SEC ↗ |
| Jun 8, 2026 | Mika Yamamoto | Director | Sale | 3.0K | $28.48 | $85.4K | SEC ↗ |
| Jun 2, 2026 | Michelle D Stalick | Chief Accounting Officer | Sale | 780 | $30.93 | $24.1K | SEC ↗ |
| May 22, 2026 | Gregory Hughes | Director | Sale | 1.6K | $30.25 | $49.5K | SEC ↗ |
| May 20, 2026 | Michelle D Stalick | Chief Accounting Officer | Sale | 459 | $30.26 | $13.9K | SEC ↗ |
| Oct 28, 2025 | Thomas Unterman | Director | Sale | 910 | $55.00 | $50.0K | SEC ↗ |
| Sep 24, 2025 | Thomas Unterman | Director | Sale | 7.3K | $55.24 | $400.7K | SEC ↗ |
| Aug 25, 2025 | Michelle D Stalick | Chief Accounting Officer | Sale | 664 | $54.03 | $35.9K | SEC ↗ |
| Aug 11, 2025 | David J Henshall | Director | Purchase | 10.0K | $48.60 | $486.0K | SEC ↗ |
| May 29, 2025 | Michelle D Stalick | Chief Accounting Officer | Sale | 795 | $55.14 | $43.8K | SEC ↗ |
| May 22, 2025 | Mark Woodhams | Chief Revenue Officer | Sale | 1.9K | $54.65 | $101.4K | SEC ↗ |
| May 13, 2025 | Michelle D Stalick | Chief Accounting Officer | Sale | 400 | $54.96 | $22.0K | SEC ↗ |
| Feb 24, 2025 | Mark Woodhams | Chief Revenue Officer | Sale | 9.1K | $49.67 | $451.4K | SEC ↗ |
| Dec 16, 2024 | Mark Woodhams | Chief Revenue Officer | Sale | 24.4K | $64.32 | $1.6M | SEC ↗ |
| Nov 12, 2024 | Karole Morgan-Prager | CHIEF LEGAL AND ADMINISTRATIVE | Sale | 50.2K | $60.50 | $3.0M | SEC ↗ |
| Nov 12, 2024 | Mika Yamamoto | Director | Sale | 3.2K | $62.08 | $199.9K | SEC ↗ |
| Oct 21, 2024 | Karole Morgan-Prager | CHIEF LEGAL AND ADMINISTRATIVE | Sale | 27.1K | $60.06 | $1.6M | SEC ↗ |
| Oct 10, 2024 | Karole Morgan-Prager | CHIEF LEGAL AND ADMINISTRATIVE | Sale | 4.2K | $55.18 | $233.2K | SEC ↗ |
| Oct 4, 2024 | Karole Morgan-Prager | CHIEF LEGAL AND ADMINISTRATIVE | Sale | 5.8K | $55.14 | $318.3K | SEC ↗ |
| Oct 2, 2024 | Karole Morgan-Prager | CHIEF LEGAL AND ADMINISTRATIVE | Sale | 10.0K | $54.03 | $540.3K | SEC ↗ |
| Oct 1, 2024 | Karole Morgan-Prager | CHIEF LEGAL AND ADMINISTRATIVE | Sale | 10.0K | $55.00 | $550.0K | SEC ↗ |
| Oct 1, 2024 | Mark Partin | CHIEF FINANCIAL OFFICER | Sale | 85.3K | $54.84 | $4.7M | SEC ↗ |
| Sep 30, 2024 | Mark Partin | CHIEF FINANCIAL OFFICER | Sale | 5.6K | $53.00 | $299.3K | SEC ↗ |
| Aug 22, 2024 | Mark Woodhams | Chief Revenue Officer | Sale | 1.4K | $51.70 | $71.7K | SEC ↗ |
Showing the 25 most recent of 240 Form 4 filings for BLACKLINE, INC..
Most active BL insiders
- Mark Partin41 filings
- Therese Tucker41 filings
- Thomas Unterman28 filings
- Karole Morgan-Prager23 filings
- Mark Woodhams17 filings
Ask anything about BL insider activity
Use Trabud's AI agent to query BLACKLINE, INC.'s Form 4 history in plain English — "Show me BL CEO purchases this year" or compare it against any other ticker.
Open the AI agentBL insider trading FAQ
Are BLACKLINE, INC. insiders buying or selling?
In the last 12 months, BLACKLINE, INC. insiders reported 0 open-market purchases ($0) and 7 sales ($2.5M) — net selling of $2.5M. Since February 2018, Trabud has recorded 240 Form 4 filings for BL: 5 buys ($1.1M) and 235 sells ($1.1B). Over the full record that is net selling of $1.1B.
How many insiders trade BL stock?
22 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for BLACKLINE, INC.. The most recent filing was accepted on Aug 28, 2026.
Where does Trabud get BL insider trading data?
All BL insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.