BlackLine, Inc.
US ˙ NasdaqGS ˙ US09239B1098

SecurityBL / BlackLine, Inc.
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership1,198 shares
Latest Disclosed Value $ 44,326
Asset Management One Co., Ltd. reports 18.45% decrease in ownership of BL / BlackLine, Inc.

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 1,198 shares of BlackLine, Inc. (US:BL) valued at $44,326 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 1,469 shares of BlackLine, Inc.. This represents a change in shares of -18.45% during the quarter. The current value of the position is $34,395 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)
2026-05-08 2026-03-31 13F BLACKLINE COM 09239B109 1,198 -271 -18.45 44 -47.62 0.0001
2026-01-27 2025-12-31 13F BLACKLINE COM 09239B109 1,469 -914 -38.36 85 -33.33 0.0002
2025-10-22 2025-09-30 13F BLACKLINE COM 09239B109 2,383 294 14.07 127 6.78 0.0004
2025-07-31 2025-06-30 13F BLACKLINE COM 09239B109 2,089 -33 -1.56 118 15.69 0.0004
2025-04-23 2025-03-31 13F BLACKLINE COM 09239B109 2,122 856 67.61 103 32.47 0.0004
2025-01-30 2024-12-31 13F BLACKLINE COM 09239B109 1,266 209 19.77 77 32.76 0.0003
2024-10-30 2024-09-30 13F BLACKLINE COM 09239B109 1,057 -65 -5.79 58 7.41 0.0002
2024-07-18 2024-06-30 13F BLACKLINE COM 09239B109 1,122 294 35.51 54 1.89 0.0002
2024-05-02 2024-03-31 13F BLACKLINE COM 09239B109 828 -138 -14.29 53 -14.52 0.0002
2024-01-24 2023-12-31 13F BLACKLINE COM 09239B109 966 -4,551 -82.49 63 -79.74 0.0003
2023-10-19 2023-09-30 13F BLACKLINE COM 09239B109 5,517 -6,138 -52.66 306 -51.20 0.0014
2023-07-31 2023-06-30 13F BLACKLINE COM 09239B109 11,655 7,846 205.99 627 145.88 0.0027
2023-04-25 2023-03-31 13F BLACKLINE COM 09239B109 3,809 2,976 357.26 256 355.36 0.0012
2023-02-06 2022-12-31 13F BLACKLINE COM 09239B109 833 -3 -0.36 56 12.00 0.0003
2022-11-04 2022-09-30 13F BLACKLINE COM 09239B109 836 67 8.71 50 -1.96 0.0003
2022-07-29 2022-06-30 13F BLACKLINE COM 09239B109 769 -155 -16.77 51 -23.88 0.0002
2022-05-13 2022-03-31 13F BLACKLINE COM 09239B109 924 231 33.33 67 -5.63 0.0003
2022-02-09 2021-12-31 13F BLACKLINE COM 09239B109 693 -57 -7.60 71 -19.32 0.0002
2021-11-02 2021-09-30 13F BLACKLINE COM 09239B109 750 -179 -19.27 88 -14.56 0.0003
2021-08-03 2021-06-30 13F BLACKLINE COM 09239B109 929 128 15.98 103 19.77 0.0004
2021-05-14 2021-03-31 13F BLACKLINE COM 09239B109 801 198 32.84 86 8.86 0.0003
2021-02-12 2020-12-31 13F BLACKLINE COM 09239B109 603 -154 -20.34 79 16.18 0.0003
2020-11-13 2020-09-30 13F BLACKLINE COM 09239B109 757 13 1.75 68 9.68 0.0003
2020-08-14 2020-06-30 13F BLACKLINE COM 09239B109 744 72 10.71 62 77.14 0.0003
2020-05-14 2020-03-31 13F BLACKLINE COM 09239B109 672 672 35 0.0002
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.