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

BLACKLINE INC

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

CUSIP 09239BAF6·52 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$548M
visible holders
Holders
52
filers reporting
Concentration
17.31%
SOROS FUND MANAGEMENT LLC #1
top holder share
AI Holders Summary · Q1 2026

52 institutions reported BL 1 06/01/29 in Q1 2026. SOROS FUND MANAGEMENT LLC leads at 17.3% of the visible book.

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
$84M90.5M5.11%Q2 202603
TENOR CAPITAL MANAGEMENT Co., L.P.
CIK 0001346554
$42M45.1M0.59%Q2 202604
Wellesley Asset Management
CIK 0001533551
$40M42.9M3.63%Q2 202605
Calamos Advisors LLC
CIK 0001316507
$37M39.9M0.12%Q2 202606
STEELHEAD PARTNERS LLC
CIK 0001133521
$26M28.0M1.84%Q2 202607
Universal- Beteiligungs- und Servicegesellschaft mbH
CIK 0002057170
$26M27.9M0.04%Q2 202608
AQR Arbitrage LLC
CIK 0001167456
$25M23.6M0.53%Q4 202509
DeepCurrents Investment Group LLC
CIK 0001754535
$22M23.6M0.66%Q2 202610
Walleye Capital LLC
CIK 0001758720
$20M21.8M0.07%Q2 202611
DAVIDSON KEMPNER CAPITAL MANAGEMENT LP
CIK 0001595082
$20M21.5M0.24%Q2 202612
Jain Global LLC
CIK 0002024579
$19M20.2M0.08%Q1 202613
STATE STREET CORP
CIK 0000093751
$16M17.5M0.00%Q2 202614
SHENKMAN CAPITAL MANAGEMENT INC
CIK 0001275228
$13M14.0M1.82%Q2 202615
FMR LLC
CIK 0000315066
$13M14.1M0.00%Q2 202616
BlackRock, Inc.
CIK 0002012383
$13M13.6M0.00%Q2 202617
Nykredit A/S
CIK 0001847328
$11M12.0M0.03%Q2 202618
ABSOLUTE INVESTMENT ADVISERS, LLC
CIK 0001316187
$10M11.0M0.98%Q2 202619
BANK OF MONTREAL /CAN/
CIK 0000927971
$9M10.0M0.00%Q2 202620
MORGAN STANLEY
CIK 0000895421
$9M9.7M0.00%Q2 2026
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