BlackLine, Inc.
US ˙ NasdaqGS ˙ US09239B1098

SecurityBL / BlackLine, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership1,083,687 shares
Latest Disclosed Value $ 40,096,448
Morgan Stanley reports 14.99% decrease in ownership of BL / BlackLine, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 1,083,687 shares of BlackLine, Inc. (US:BL) valued at $40,096,419 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 1,274,776 shares of BlackLine, Inc.. This represents a change in shares of -14.99% during the quarter. The current value of the position is $31,112,654 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 1,083,687 -191,089 -14.99 40,096 -43.11 0.0024
2026-05-27 2025-12-31 13F/A-1 BLACKLINE COM 09239B109 1,274,776 4,832 0.38 70,482 4.52 0.0042
2026-02-13 2025-12-31 13F BLACKLINE COM 09239B109 1,274,776 4,832 70,482 0.0042
2026-05-27 2025-09-30 13F/A-1 BLACKLINE COM 09239B109 1,269,944 1,310 0.10 67,434 -6.12 0.0041
2025-11-14 2025-09-30 13F BLACKLINE COM 09239B109 1,269,944 1,310 67,434 0.0041
2025-08-15 2025-06-30 13F BLACKLINE COM 09239B109 1,268,634 57,209 4.72 71,830 22.46 0.0047
2025-05-15 2025-03-31 13F BLACKLINE COM 09239B109 1,211,425 -5,958 -0.49 58,657 -20.70 0.0042
2025-05-15 2024-12-31 13F/A-1 BLACKLINE COM 09239B109 1,217,383 421,163 52.90 73,968 68.48 0.0052
2025-02-14 2024-12-31 13F BLACKLINE COM 09239B109 1,217,383 421,163 73,968 0.0052
2025-05-14 2024-09-30 13F/A-2 BLACKLINE COM 09239B109 796,220 273,396 52.29 43,904 73.32 0.0032
2025-02-14 2024-09-30 13F/A-1 BLACKLINE COM 09239B109 796,220 273,396 43,904 0.0032
2024-11-14 2024-09-30 13F BLACKLINE COM 09239B109 796,220 273,396 43,904 0.0032
2025-05-14 2024-06-30 13F/A-2 BLACKLINE COM 09239B109 522,824 -1,796,234 -77.46 25,331 -83.09 0.0020
2024-10-17 2024-06-30 13F/A-1 BLACKLINE COM 09239B109 522,824 -1,796,234 25,331 0.0020
2024-08-14 2024-06-30 13F BLACKLINE COM 09239B109 522,824 -1,796,234 25,331 0.0020
2024-10-17 2024-03-31 13F/A-2 BLACKLINE COM 09239B109 2,319,058 749,586 47.76 149,765 52.83 0.0120
2024-08-16 2024-03-31 13F/A-1 BLACKLINE COM 09239B109 2,319,058 749,586 149,765 0.0014
2024-05-15 2024-03-31 13F BLACKLINE COM 09239B109 2,319,058 749,586 149,765 0.0120
2024-08-16 2023-12-31 13F/A-1 BLACKLINE COM 09239B109 1,569,472 567,122 56.58 97,998 76.25 0.0086
2024-02-13 2023-12-31 13F BLACKLINE COM 09239B109 1,569,472 567,122 97,998 0.0086
2023-11-15 2023-09-30 13F BLACKLINE COM 09239B109 1,002,350 -470,387 -31.94 55,600 -29.85 0.0057
2023-08-14 2023-06-30 13F BLACKLINE COM 09239B109 1,472,737 -181,668 -10.98 79,263 -28.65 0.0078
2023-05-15 2023-03-31 13F BLACKLINE COM 09239B109 1,654,405 187,167 12.76 111,093 12.56 0.0119
2023-02-14 2022-12-31 13F BLACKLINE COM 09239B109 1,467,238 50,525 3.57 98,701 16.31 0.0112
2022-11-14 2022-09-30 13F BLACKLINE COM 09239B109 1,416,713 171,562 13.78 84,862 2.33 0.0116
2022-10-27 2022-06-30 13F/A-1 BLACKLINE COM 09239B109 1,245,151 -87,616 -6.57 82,927 -15.02 0.0108
2022-08-15 2022-06-30 13F BLACKLINE COM 09239B109 1,245,151 -87,616 82,927 0.0022
2022-10-27 2022-03-31 13F/A-1 BLACKLINE COM 09239B109 1,332,767 130,068 10.81 97,585 -21.64 0.0132
2022-05-13 2022-03-31 13F BLACKLINE COM 09239B109 1,332,767 130,068 97,585 0.0132
2022-02-14 2021-12-31 13F BLACKLINE COM 09239B109 1,202,699 342,940 39.89 124,527 22.68 0.0154
2021-11-15 2021-09-30 13F BLACKLINE COM 09239B109 859,759 -67,097 -7.24 101,503 -1.58 0.0137
2021-08-23 2021-06-30 13F/A-1 BLACKLINE COM 09239B109 926,856 473,347 104.37 103,132 109.78 0.0136
2021-08-16 2021-06-30 13F BLACKLINE COM 09239B109 926,856 473,347 103,132 0.0028
2021-05-17 2021-03-31 13F BLACKLINE COM 09239B109 453,509 -544 -0.12 49,161 -18.83 0.0072
2021-02-16 2020-12-31 13F BLACKLINE COM 09239B109 454,053 -156,562 -25.64 60,562 10.66 0.0094
2020-11-13 2020-09-30 13F BLACKLINE COM 09239B109 610,615 -80,849 -11.69 54,729 -4.54 0.0106
2020-08-14 2020-06-30 13F BLACKLINE COM 09239B109 691,464 -51,057 -6.88 57,329 46.76 0.0127
2020-05-26 2020-03-31 13F/A-1 BLACKLINE COM 09239B109 742,521 -157,331 -17.48 39,063 -15.81 0.0106
2020-05-15 2020-03-31 13F BLACKLINE COM 09239B109 742,521 -157,331 39,063 3,000.8527
2020-02-14 2019-12-31 13F BLACKLINE COM 09239B109 899,852 173,272 23.85 46,396 33.56 0.0108
2019-11-14 2019-09-30 13F BLACKLINE COM 09239B109 726,580 587,408 422.07 34,738 366.41 0.0092
2019-08-14 2019-06-30 13F BLACKLINE COM 09239B109 139,172 69,686 100.29 7,448 131.45 0.0020
2019-05-15 2019-03-31 13F BLACKLINE COM 09239B109 69,486 -66,672 -48.97 3,218 -42.28 0.0009
2019-02-14 2018-12-31 13F BLACKLINE COM 09239B109 136,158 -98,432 -41.96 5,575 -57.92 0.0017
2019-04-23 2018-09-30 13F/A-2 BLACKLINE COM 09239B109 234,590 25,679 12.29 13,248 46.02 0.0033
2018-11-20 2018-09-30 13F/A-1 BLACKLINE COM 09239B109 234,590 0 13,248 0.0033
2018-11-14 2018-09-30 13F BLACKLINE COM 09239B109 234,590 25,679 13,248
2019-04-23 2018-06-30 13F/A-1 BLACKLINE COM 09239B109 208,911 -165,751 -44.24 9,073 -38.24 0.0025
2018-08-14 2018-06-30 13F BLACKLINE COM 09239B109 208,911 -165,751 9,073
2019-04-23 2018-03-31 13F/A-1 BLACKLINE COM 09239B109 374,662 278,535 289.76 14,690 365.91 0.0041
2018-05-14 2018-03-31 13F BLACKLINE COM 09239B109 374,662 278,535 14,690
2019-04-23 2017-12-31 13F/A-1 BLACKLINE COM 09239B109 96,127 51,769 116.71 3,153 108.26 0.0009
2018-02-14 2017-12-31 13F BLACKLINE COM 09239B109 96,127 51,769 3,153
2017-11-14 2017-09-30 13F BLACKLINE COM 09239B109 44,358 15,076 51.49 1,514 44.74 0.0005
2017-08-11 2017-06-30 13F BLACKLINE COM 09239B109 29,282 3,450 13.36 1,046 36.20 0.0003
2017-05-22 2017-03-31 13F/A-1 BLACKLINE COM 09239B109 25,832 -5,823 -18.40 768 -12.23 0.0002
2017-05-12 2017-03-31 13F BLACKLINE COM 09239B109 25,832 768
2017-02-22 2016-12-31 13F/A-1 BLACKLINE COM 09239B109 31,655 31,655 875 0.0003
2017-02-13 2016-12-31 13F BLACKLINE COM 09239B109 31,655 875 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.