Blackline Inc
Held by 1 superinvestor (BL).
Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.
Blackline Inc (BL) is held by 1 of the superinvestors tracked on Compounder, with a combined $50.6M in reported 13F value. The largest position belongs to Glenn Welling, where it makes up 16.7% of the portfolio.
Over the latest quarter, 0 of the tracked filers opened a new position in BL, 1 added to existing ones, 0 trimmed, and 1 sold out entirely.
Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.
Superinvestors holding this security over the last 8 quarters: 1 → 1.
Early quarters may understate holder counts due to data backfill — read the slope with care.
- Value$50.6MWeight (prev→now)15.3% → 16.7% ▲
Sources· SEC EDGAR 13F as of 2026-05-15
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