13F Insight
DOSSIER · 13F Holders · Q1 2026BellwetherCompounder
BL 1 06/01/29

BLACKLINE INC

58 institutions still hold BLACKLINE INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 09239BAF6·58 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 2.8%
vs prior quarter
13F value held
$582M
60.0% inst. owned
of float
Holders
58
+103 QoQ
filers reporting
Activity
+50 / −91
+963 added · −765 reduced
this quarter
Concentration
16.31%
SOROS FUND MANAGEMENT LLC #1
top holder share
AI Holders Summary · Q1 2026

58 institutions reported BL 1 06/01/29 in Q1 2026. SOROS FUND MANAGEMENT LLC leads at 16.3% of the visible book. +103 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
SOROS FUND MANAGEMENT LLC
CIK 0001029160
$95M101.0M1.04%Q1 202602
Opti Capital Management, LP
CIK 0001738654
$85M90.5M6.14%Q1 202603
TENOR CAPITAL MANAGEMENT Co., L.P.
CIK 0001346554
$43M45.1M0.65%Q1 202604
CITADEL ADVISORS LLC
CIK 0001423053
$42M39.4M0.01%Q4 202505
Calamos Advisors LLC
CIK 0001316507
$38M39.9M0.13%Q1 202606
WOLVERINE ASSET MANAGEMENT LLC
CIK 0001279891
$35M37.0M0.34%Q1 202607
Wellesley Asset Management
CIK 0001533551
$34M36.9M3.54%Q1 202608
STEELHEAD PARTNERS LLC
CIK 0001133521
$26M28.0M1.89%Q1 202609
AQR Arbitrage LLC
CIK 0001167456
$25M23.6M0.53%Q4 202510
Jain Global LLC
CIK 0002024579
$19M20.2M0.08%Q1 202611
Universal- Beteiligungs- und Servicegesellschaft mbH
CIK 0002057170
$19M19.9M0.03%Q1 202612
DeepCurrents Investment Group LLC
CIK 0001754535
$18M18.6M0.56%Q1 202613
SHENKMAN CAPITAL MANAGEMENT INC
CIK 0001275228
$17M17.5M2.02%Q1 202614
BNP PARIBAS FINANCIAL MARKETS
CIK 0001166588
$16M17.4M0.01%Q1 202615
FMR LLC
CIK 0000315066
$13M14.1M0.00%Q1 202616
STATE STREET CORP
CIK 0000093751
$13M14.0M0.00%Q1 202617
HBK INVESTMENTS L P
CIK 0001011443
$12M13.0M0.12%Q1 202618
BANK OF MONTREAL /CAN/
CIK 0000927971
$12M12.4M0.00%Q1 202619
ABSOLUTE INVESTMENT ADVISERS, LLC
CIK 0001316187
$11M12.0M1.32%Q1 202620
BlackRock, Inc.
CIK 0002012383
$10M10.6M0.00%Q1 2026
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