Comparable stake leader
BlackRock, Inc.
SEC ownership of BLACKLINE, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001666134.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
20 Aug 2026
- Public ticker
- BL on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
20 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001666134
- Issuer location
- Woodland Hills, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of BLACKLINE, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
20 Aug 2026
13D/G
13F
3/4/5
Lead comparable stake: 13%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 13%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
13%
VANGUARD PORTFOLIO MANAGEMENT LLC
6.9%
Fivespan Partners, LP
5.1%
FMR LLC
4.3%
Therese Tucker
7.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
13%
|
$444,455,053
7,849,789 shares
|
$0 | 30 Jun 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
6.9%
|
$151,924,738
4,106,074 shares
|
$0 | 31 Mar 2026 |
| Fivespan Partners, LP |
13D/G
13F
Company
|
5.1%
|
$132,161,401
3,013,943 shares
|
$0 | 11 Mar 2026 |
| FMR LLC |
13D/G
13F
Company
|
4.3%
|
$144,240,856
2,688,553 shares
|
-$64,474,263 | 30 Jun 2025 |
| Therese Tucker |
3/4/5
Founder, Director
|
7.5%
|
$165,793,855
4,480,915 shares
|
— | 20 May 2026 |
| Patrick Villanova |
3/4/5
Chief Financial Officer
|
0.22%
|
$3,678,910
131,062 shares
|
— | 20 Aug 2026 |
| Jimmy C. Duan |
3/4/5
Chief Customer Officer
|
0.2%
|
$3,365,789
119,907 shares
|
— | 20 Aug 2026 |
| Stuart van Houten |
3/4/5
Chief Commercial Officer
|
0.18%
|
$3,002,535
106,966 shares
|
— | 20 Aug 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$323,107.
Buys
$0
Insiders: 0
Sells
$323,107
Insiders: 4
Net
-$323,107
Shares: -8,606
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 8,606
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 3,780 | $0 | $109,551 | -$109,551 |
| 3-6 | 0 | 2,096 | $0 | $63,406 | -$63,406 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 2,730 | $0 | $150,150 | -$150,150 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 28 reporting-owner rows connected to BLACKLINE, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
28
Largest Forms 3/4/5 holder
Therese Tucker
Net 12M change
-$323,107
Latest report
20 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Therese Tucker | Founder, Director | $165,793,855 | Mixed | 20 May 2026 | ||
| Mark Partin | Chief Financial Officer | $21,268,981 | Mixed | 20 Feb 2025 | ||
| Marc Huffman | Chief Executive Officer, Director | $18,586,489 | Mixed | 21 Feb 2023 | ||
| Owen Ryan | Chief Executive Officer, Director | $10,972,871 | Median | 20 Aug 2026 | ||
| Thomas Unterman | Director | $5,414,496 | -$150,150 | -2.7% | Mixed | 27 Oct 2025 |
| Karole Morgan-Prager | Chief Legal and Administrative | $4,497,066 | Median | 20 Aug 2026 | ||
| Jeremy Ung | Chief Technology Officer | $3,783,976 | Median | 20 Aug 2026 | ||
| Patrick Villanova | Chief Financial Officer | $3,678,910 | Median | 20 Aug 2026 | ||
| Peter Hirsch | Chief Technology Officer | $3,395,812 | Mixed | 19 May 2023 | ||
| Jimmy C. Duan | Chief Customer Officer | $3,365,789 | Median | 20 Aug 2026 | ||
| Mark Woodhams | Chief Revenue Officer | $3,354,963 | Filing P/S | 20 May 2025 | ||
| Stuart van Houten | Chief Commercial Officer | $3,002,535 | Median | 20 Aug 2026 | ||
| Michelle D. Stalick | Chief Accounting Officer | $996,260 | -$38,012 | -3.7% | Median | 20 Aug 2026 |
| Sophia Velastegui | Director | $960,002 | Mixed | 07 May 2026 | ||
| David J. Henshall | Director | $843,378 | Mixed | 07 May 2026 | ||
| Brunilda Rios | Director | $670,255 | Mixed | 07 May 2026 | ||
| Graham Smith | Director | $648,569 | Mixed | 01 Nov 2021 | ||
| Kevin B. Thompson | Director | $632,500 | Filing P/S | 29 Feb 2024 | ||
| Barbara Whye | Director | $627,853 | Mixed | 07 May 2026 | ||
| Camille Drummond | Director | $501,461 | Mixed | 06 May 2026 |
Recent insider transactions for BLACKLINE, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Jimmy C. Duan | BL | Common Stock | Tax liability | -1.59% | -1,941 | 119,907 | 20 Aug 2026 | Direct | ||
| Patrick Villanova | BL | Common Stock | Tax liability | -1.33% | -1,760 | 131,062 | 20 Aug 2026 | Direct | ||
| Stuart van Houten | BL | Common Stock | Tax liability | -1.58% | -1,720 | 106,966 | 20 Aug 2026 | Direct | ||
| Jeremy Ung | BL | Common Stock | Tax liability | -1.65% | -2,264 | 134,805 | 20 Aug 2026 | Direct | ||
| Michelle D. Stalick | BL | Common Stock | Tax liability | -2.4% | -871 | 35,492 | 20 Aug 2026 | Direct | ||
| Owen Ryan | BL | Common Stock | Tax liability | -1.69% | -6,700 | 390,911 | 20 Aug 2026 | Direct | ||
| Karole Morgan-Prager | BL | Common Stock | Tax liability | -1.67% | -2,725 | 160,209 | 20 Aug 2026 | Direct | ||
| Mika Yamamoto | BL | Common Stock | Sale | -15.2% | $85,426 | $28.48 | -3,000 | 16,692 | 05 Jun 2026 | Direct |
| Michelle D. Stalick | BL | Common Stock | Sale | -2.1% | $24,125 | $30.93 | -780 | 36,363 | 01 Jun 2026 | Direct |
| Gregory Hughes | BL | Common Stock | Sale | -17.4% | $49,519 | $30.25 | -1,637 | 7,755 | 21 May 2026 | Direct |
| Jimmy C. Duan | BL | Common Stock | Tax liability | -1.57% | -1,941 | 121,848 | 20 May 2026 | Direct | ||
| Owen Ryan | BL | Common Stock | Tax liability | -1.66% | -6,699 | 397,611 | 20 May 2026 | Direct | ||
| Michelle D. Stalick | BL | Common Stock | Tax liability | -2.29% | -871 | 37,143 | 20 May 2026 | Direct | ||
| Patrick Villanova | BL | Common Stock | Tax liability | -1.31% | -1,759 | 132,822 | 20 May 2026 | Direct | ||
| Stuart van Houten | BL | Common Stock | Tax liability | -1.56% | -1,720 | 108,686 | 20 May 2026 | Direct | ||
| Jeremy Ung | BL | Common Stock | Tax liability | -1.62% | -2,263 | 137,069 | 20 May 2026 | Direct | ||
| Therese Tucker | BL | Common Stock | Tax liability | -1.84% | -6,663 | 354,997 | 20 May 2026 | Direct | ||
| Karole Morgan-Prager | BL | Common Stock | Tax liability | -1.64% | -2,725 | 162,934 | 20 May 2026 | Direct | ||
| Michelle D. Stalick | BL | Common Stock | Sale | -1.19% | $13,887 | $30.26 | -459 | 38,014 | 18 May 2026 | Direct |
| Owen Ryan | BL | Common Stock | Gift | -0.06% | -250 | 404,310 | 14 May 2026 | Direct | ||
| Sophia Velastegui | BL | Common Stock | Award | 32.8% | 6,416 | 25,946 | 07 May 2026 | Direct | ||
| Megan Prichard | BL | Common Stock | Award | 695.9% | 6,416 | 7,338 | 07 May 2026 | Direct | ||
| Barbara Whye | BL | Common Stock | Award | 60.8% | 6,416 | 16,969 | 07 May 2026 | Direct | ||
| Brunilda Rios | BL | Common Stock | Award | 54.8% | 6,416 | 18,115 | 07 May 2026 | Direct | ||
| Mika Yamamoto | BL | Common Stock | Award | 48.3% | 6,416 | 19,692 | 07 May 2026 | Direct | ||
| Storm Duncan | BL | Common Stock | Award | 695.9% | 6,416 | 7,338 | 07 May 2026 | Direct | ||
| David J. Henshall | BL | Common Stock | Award | 39.2% | 6,416 | 22,794 | 07 May 2026 | Direct | ||
| Scott Davidson | BL | Common Stock | Award | 144.4% | 6,416 | 10,860 | 07 May 2026 | Direct | ||
| Gregory Hughes | BL | Common Stock | Award | 215.6% | 6,416 | 9,392 | 07 May 2026 | Direct | ||
| Saranga Balaji | BL | Common Stock | Award | 189.2% | 6,416 | 9,807 | 07 May 2026 | Direct | ||
| Camille Drummond | BL | Common Stock | Award | 89.9% | 6,416 | 13,553 | 07 May 2026 | Direct | ||
| Camille Drummond | BL | Common Stock | Tax liability | -2.43% | -178 | 7,137 | 06 May 2026 | Direct | ||
| Jimmy C. Duan | BL | Common Stock | Award | 49.9% | 41,040 | 123,330 | 01 Apr 2026 | Direct | ||
| Karole Morgan-Prager | BL | Common Stock | Award | 39% | 46,510 | 165,659 | 01 Apr 2026 | Direct | ||
| Owen Ryan | BL | Common Stock | Award | 59.3% | 150,470 | 404,101 | 01 Apr 2026 | Direct | ||
| Michelle D. Stalick | BL | Common Stock | Award | 76% | 16,420 | 38,014 | 01 Apr 2026 | Direct | ||
| Jeremy Ung | BL | Common Stock | Award | 57% | 50,610 | 139,332 | 01 Apr 2026 | Direct | ||
| Stuart van Houten | BL | Common Stock | Award | 76.6% | 47,880 | 110,406 | 01 Apr 2026 | Direct | ||
| Patrick Villanova | BL | Common Stock | Award | 88.4% | 62,930 | 134,122 | 01 Apr 2026 | Direct | ||
| Megan Prichard | BL | Common Stock | Award | 922 | 922 | 11 Mar 2026 | Direct | |||
| Storm Duncan | BL | Common Stock | Award | 922 | 922 | 11 Mar 2026 | Direct | |||
| Jeremy Ung | BL | Common Stock | Tax liability | -10.5% | -10,404 | 88,722 | 20 Feb 2026 | Direct | ||
| Jeremy Ung | BL | Common Stock | Options Exercise | 15.8% | 13,543 | 99,126 | 20 Feb 2026 | Direct | ||
| Patrick Villanova | BL | Common Stock | Tax liability | -12.9% | -10,573 | 71,192 | 20 Feb 2026 | Direct | ||
| Patrick Villanova | BL | Common Stock | Options Exercise | 12.3% | 8,940 | 81,765 | 20 Feb 2026 | Direct | ||
| Stuart van Houten | BL | Common Stock | Tax liability | -10.6% | -7,453 | 62,526 | 20 Feb 2026 | Direct | ||
| Stuart van Houten | BL | Common Stock | Options Exercise | 14.7% | 8,979 | 69,979 | 20 Feb 2026 | Direct | ||
| Therese Tucker | BL | Common Stock | Tax liability | -8.08% | -31,786 | 361,660 | 20 Feb 2026 | Direct | ||
| Therese Tucker | BL | Common Stock | Options Exercise | 12% | 42,318 | 393,446 | 20 Feb 2026 | Direct | ||
| Michelle D. Stalick | BL | Common Stock | Tax liability | -11.6% | -2,842 | 21,594 | 20 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.