BlackLine, Inc.
US ˙ NasdaqGS ˙ US09239B1098

SecurityBL / BlackLine, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership2,040,318 shares
Latest Disclosed Value $ 75,491,766
State Street Corp reports 2.06% increase in ownership of BL / BlackLine, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 2,040,318 shares of BlackLine, Inc. (US:BL) valued at $75,491,766 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,999,194 shares of BlackLine, Inc.. This represents a change in shares of 2.06% during the quarter. The current value of the position is $58,577,530 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 2,040,318 41,124 2.06 75,492 -31.70 0.0026
2026-02-13 2025-12-31 13F BLACKLINE COM 09239B109 1,999,194 -57,494 -2.80 110,535 1.21 0.0037
2025-11-14 2025-09-30 13F BLACKLINE COM 09239B109 2,056,688 -15,114 -0.73 109,210 -6.90 0.0038
2025-08-14 2025-06-30 13F BLACKLINE COM 09239B109 2,071,802 -72,114 -3.36 117,305 13.00 0.0044
2025-05-15 2025-03-31 13F BLACKLINE COM 09239B109 2,143,916 -53,535 -2.44 103,808 -22.25 0.0043
2025-02-14 2024-12-31 13F BLACKLINE COM 09239B109 2,197,451 89,783 4.26 133,517 14.89 0.0053
2024-11-14 2024-09-30 13F BLACKLINE COM 09239B109 2,107,668 31,847 1.53 116,217 15.55 0.0047
2024-08-14 2024-06-30 13F BLACKLINE COM 09239B109 2,075,821 31,536 1.54 100,574 -23.82 0.0044
2024-05-15 2024-03-31 13F BLACKLINE COM 09239B109 2,044,285 789,601 62.93 132,020 68.52 0.0059
2024-02-14 2023-12-31 13F BLACKLINE COM 09239B109 1,254,684 54,215 4.52 78,342 17.65 0.0038
2023-11-14 2023-09-30 13F BLACKLINE COM 09239B109 1,200,469 -2,057 -0.17 66,590 2.89 0.0037
2023-08-14 2023-06-30 13F BLACKLINE COM 09239B109 1,202,526 44,280 3.82 64,720 -16.79 0.0034
2023-05-15 2023-03-31 13F BLACKLINE COM 09239B109 1,158,246 36,771 3.28 77,776 3.10 0.0044
2023-05-15 2022-12-31 13F/A-99 BLACKLINE COM 09239B109 1,121,475 -12,392 -1.09 75,442 11.07 0.0044
2023-05-15 2022-12-31 13F BLACKLINE COM 09239B109 1,121,475 -12,392 75,442 0.0044
2022-11-15 2022-09-30 13F BLACKLINE COM 09239B109 1,133,867 9,916 0.88 67,919 -9.27 0.0043
2022-08-15 2022-06-30 13F BLACKLINE COM 09239B109 1,123,951 12,179 1.10 74,855 -8.05 0.0045
2022-05-16 2022-03-31 13F BLACKLINE COM 09239B109 1,111,772 32,347 3.00 81,404 -27.16 0.0040
2022-02-14 2021-12-31 13F BLACKLINE COM 09239B109 1,079,425 10,223 0.96 111,764 -11.46 0.0053
2021-11-15 2021-09-30 13F BLACKLINE COM 09239B109 1,069,202 2,137 0.20 126,230 6.32 0.0067
2021-08-16 2021-06-30 13F BLACKLINE COM 09239B109 1,067,065 52,339 5.16 118,732 7.94 0.0063
2021-07-09 2021-03-31 13F/A-1 BLACKLINE COM 09239B109 1,014,726 -18,351 -1.78 109,996 -20.17 0.0063
2021-05-17 2021-03-31 13F BLACKLINE COM 09239B109 1,014,726 -18,351 109,996 0.0063
2021-02-16 2020-12-31 13F BLACKLINE COM 09239B109 1,033,077 24,514 2.43 137,792 52.43 0.0084
2020-11-10 2020-09-30 13F BLACKLINE COM 09239B109 1,008,563 -21,526 -2.09 90,398 5.85 0.0062
2020-08-14 2020-06-30 13F BLACKLINE COM 09239B109 1,030,089 114,741 12.54 85,405 77.35 0.0062
2020-06-19 2020-03-31 13F/A-1 BLACKLINE COM 09239B109 915,348 -9,851 -1.06 48,156 0.95 0.0042
2020-05-11 2020-03-31 13F BLACKLINE COM 09239B109 915,348 -9,851 48,156 4,229.0664
2020-02-06 2019-12-31 13F BLACKLINE COM 09239B109 925,199 40,538 4.58 47,703 12.78 0.0033
2019-11-14 2019-09-30 13F BLACKLINE COM 09239B109 884,661 -194,444 -18.02 42,296 -26.75 0.0032
2019-08-14 2019-06-30 13F BLACKLINE COM 09239B109 1,079,105 124,364 13.03 57,743 30.57 0.0043
2019-05-15 2019-03-31 13F BLACKLINE COM 09239B109 954,741 56,996 6.35 44,224 20.29 0.0035
2019-02-12 2018-12-31 13F BLACKLINE COM 09239B109 897,745 162,204 22.05 36,763 -11.49 0.0033
2018-11-09 2018-09-30 13F BLACKLINE Common equity shares 09239B109 735,541 72,046 10.86 41,536 44.16 0.0032
2018-08-14 2018-06-30 13F BLACKLINE Common equity shares 09239B109 663,495 152,143 29.75 28,813 43.69 0.0024
2018-05-15 2018-03-31 13F BLACKLINE Common equity shares 09239B109 511,352 214,178 72.07 20,052 105.72 0.0017
2018-02-14 2017-12-31 13F BLACKLINE Common equity shares 09239B109 297,174 74,325 33.35 9,747 28.12 0.0008
2017-11-14 2017-09-30 13F BLACKLINE Common equity shares 09239B109 222,849 43,266 24.09 7,608 18.50 0.0007
2017-08-14 2017-06-30 13F BLACKLINE Common equity shares 09239B109 179,583 39,525 28.22 6,420 53.96 0.0006
2017-05-15 2017-03-31 13F BLACKLINE Common equity shares 09239B109 140,058 32,663 30.41 4,170 40.50 0.0004
2017-02-09 2016-12-31 13F BLACKLINE Common equity shares 09239B109 107,395 107,395 2,968 0.0003
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.