BlackLine, Inc.
US ˙ NasdaqGS ˙ US09239B1098

SecurityBL / BlackLine, Inc.
InstitutionHolocene Advisors, LP
Latest Disclosed Ownership32,875 shares
Latest Disclosed Value $ 1,216,375
Holocene Advisors, LP reports 114.57% increase in ownership of BL / BlackLine, Inc.

On May 15, 2026 - Holocene Advisors, LP filed a 13F-HR form disclosing ownership of 32,875 shares of BlackLine, Inc. (US:BL) valued at $1,216,375 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,321 shares of BlackLine, Inc.. This represents a change in shares of 114.57% during the quarter. The current value of the position is $943,841 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F BLACKLINE COM 09239B109 32,875 17,554 114.57 1,216 43.57 0.0029
2026-02-17 2025-12-31 13F BLACKLINE COM 09239B109 15,321 -12,746 -45.41 847 -43.15 0.0018
2025-11-14 2025-09-30 13F BLACKLINE COM 09239B109 28,067 -39,456 -58.43 1,490 -61.03 0.0034
2025-08-14 2025-06-30 13F BLACKLINE COM 09239B109 67,523 6,798 11.19 3,823 30.03 0.0093
2025-05-15 2025-03-31 13F BLACKLINE COM 09239B109 60,725 31,586 108.40 2,940 66.10 0.0086
2025-02-14 2024-12-31 13F BLACKLINE COM 09239B109 29,139 -57,207 -66.25 1,770 -62.82 0.0057
2024-11-14 2024-09-30 13F BLACKLINE COM 09239B109 86,346 -14,252 -14.17 4,761 -2.30 0.0192
2024-08-14 2024-06-30 13F BLACKLINE COM 09239B109 100,598 29,763 42.02 4,874 6.54 0.0203
2024-05-15 2024-03-31 13F BLACKLINE COM 09239B109 70,835 9,902 16.25 4,575 20.24 0.0168
2024-02-14 2023-12-31 13F BLACKLINE COM 09239B109 60,933 -9,937 -14.02 3,805 -3.23 0.0148
2023-11-14 2023-09-30 13F BLACKLINE COM 09239B109 70,870 19,133 36.98 3,931 41.20 0.0172
2023-08-14 2023-06-30 13F BLACKLINE COM 09239B109 51,737 40,331 353.59 2,784 263.92 0.0119
2023-05-15 2023-03-31 13F BLACKLINE COM 09239B109 11,406 11,406 766 0.0038
2023-02-14 2022-12-31 13F BLACKLINE COM 09239B109 0 -5,934 -100.00 0 -100.00
2022-11-14 2022-09-30 13F BLACKLINE COM 09239B109 5,934 -39,099 -86.82 355 -88.16 0.0023
2022-08-15 2022-06-30 13F BLACKLINE COM 09239B109 45,033 8,581 23.54 2,999 12.36 0.0181
2022-05-16 2022-03-31 13F BLACKLINE COM 09239B109 36,452 36,452 2,669 0.0139
2022-02-14 2021-12-31 13F BLACKLINE COM 09239B109 0 -8,780 -100.00 0 -100.00
2021-11-15 2021-09-30 13F BLACKLINE COM 09239B109 8,780 8,780 1,037 0.0056
2021-02-16 2020-12-31 13F BLACKLINE COM 09239B109 0 -3,595 -100.00 0 -100.00
2020-11-16 2020-09-30 13F BLACKLINE COM 09239B109 3,595 3,595 322 0.0024
2020-02-14 2019-12-31 13F BLACKLINE COM 09239B109 0 -7,231 -100.00 0 -100.00
2019-11-14 2019-09-30 13F BLACKLINE COM 09239B109 7,231 371 5.41 346 -5.72 0.0036
2019-08-14 2019-06-30 13F BLACKLINE COM 09239B109 6,860 -2,983 -30.31 367 -19.52 0.0047
2019-05-15 2019-03-31 13F BLACKLINE COM 09239B109 9,843 9,843 456 0.0070
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.