Blackline (BL) Held by Superinvestors
BLACKLINE INC (BL) is currently held by 1 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $23.23M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Engaged Capital is currently the largest disclosed institutional shareholder of BL tracked by InsiderSet, reporting ownership valued at approximately $23.23M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $27.98M, representing an estimated gain of +20.45% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed BL value among the investors covered in this analysis. Major shareholders include Engaged Capital, and several other long-term asset managers with concentrated positions in BLACKLINE INC (BL).
This page ranks the largest institutional BL shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Engaged Capital | Glenn W. Welling | 7.10% | 827,619 | $23,231,265 | $27,981,798 | +$4,750,533 | +20.45% |
Frequently asked questions about BL
Who are the largest superinvestors holding BL?
The largest superinvestors holding BL in the latest SEC Form 13F filings include Engaged Capital. InsiderSet ranks these superinvestors by their latest reported BL position.
What does the BL superinvestors page include?
This page tracks BL positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. BLACKLINE INC (BL) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold BL?
InsiderSet currently tracks 1 superinvestors reporting BL holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own BL.
How much BL stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $23.23M in BL holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were BL superinvestor holdings last updated?
The latest BL superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor BL holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its BL position after the reporting date.
Are superinvestors buying or selling BL?
Buying and selling can be analyzed by comparing BL positions across consecutive 13F reporting periods. InsiderSet's BL Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View BL ownership changes.
How have superinvestor BL holdings changed over time?
InsiderSet tracks BL holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.