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Disclosery

BL BLACKLINE INC

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COM (common), issuer CIK 1666134

270 managers (279 13F filers) reported a position in BL shares at 2026-03-31, 63,982,030 shares in all. 47 filers opened a position and 80 filers sold out during the quarter.

Managers
270
13F filers
279
New
47
Added
87
Reduced
95
Sold out
80
Shares held by filers
63,982,030

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.7,680,962$284M<0.01%+34,02413F-HRTimelineGroup
VANGUARD GROUP INCgroup of 8 filers holding6,851,450$254M+6,845,669Timeline
CLEARLAKE CAPITAL GROUP, L.P.5,712,300$211M31.06%013F-HRTimeline
UBS Group AGgroup of 2 filers holding3,317,183$123M+2,538,827Timeline
Fivespan Partners, LP3,013,943$112M29.55%+2,087,89913F-HRTimeline
FIRST MANHATTAN CO. LLC.2,676,987$99M0.27%+248,38313F-HRTimeline
ICONIQ Capital, LLCin group ICONIQ Capital, LLC2,087,081$77.2M1.73%013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP2,040,318$75.5M<0.01%+41,12413F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC2,024,391$74.9M0.06%-130,93013F-HRTimelineGroup
HAWK RIDGE CAPITAL MANAGEMENT LP1,890,823$70M2.54%+393,19213F-HRTimeline
Conestoga Capital Advisors, LLC1,685,484$62.4M1.25%-163,51313F-HRTimeline
WESTWOOD HOLDINGS GROUP INCin group WESTWOOD HOLDINGS GROUP INC1,456,649$53.9M0.39%-63,15013F-HRTimelineGroup
Engaged Capital LLCin group Engaged Capital LLC1,367,619$50.6M16.68%+284,00013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,234,191$45.7M<0.01%-11,04613F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,210,288$44.2M<0.01%-45,92313F-HR/ATimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,083,687$40.1M<0.01%-191,08913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,063,655$39.4M0.01%+181,57713F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/914,813$33.8M<0.01%+77,59613F-HRTimelineGroup
FMR LLCin group FMR LLC885,381$32.8M<0.01%-382,44113F-HRTimelineGroup
Tensile Capital Management LP750,786$27.8M3.98%-40,15913F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP616,716$22.8M0.02%+159,56113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP591,514$21.9M<0.01%-45,87813F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co520,850$19.3M<0.01%+38,04913F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC508,929$18.8M<0.01%-244,14913F-HRTimelineGroup
GENEVA CAPITAL MANAGEMENT LLC478,086$17.7M0.38%-347,77613F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …468,519$17.3M0.01%new13F-HRTimelineGroup
PALISADE CAPITAL MANAGEMENT, LP441,232$16.3M0.54%+25,78813F-HRTimeline
GAGNON SECURITIES LLCgroup of 2 filers holding426,474$15.8M+17,026Timeline
Potrero Capital Research LLC421,149$15.6M9.56%+50,59213F-HRTimeline
JUPITER ASSET MANAGEMENT LTDin group JUPITER ASSET MANAGEMENT LTD390,787$14.5M0.08%+382,05113F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp377,360$14M<0.01%-11,69313F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS376,466$13.9M0.01%-1,22113F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC361,796$13.4M0.01%+36,03413F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC331,995$12.3M<0.01%-140,01513F-HRTimelineGroup
WESTERLY CAPITAL MANAGEMENT, LLC310,000$11.5M3.53%+220,00013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/271,844$10.1M<0.01%+9,03313F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA259,350$9.6M<0.01%-19,03813F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.252,140$9.33M<0.01%+25,50713F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC249,288$9.22M<0.01%-63,30913F-HR/ATimelineGroup
Invenomic Capital Management LP235,012$8.7M0.4%new13F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 3 filers holding230,521$8.53M+76,352Timeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.215,207$7.96M0.01%+14,71913F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management210,169$7.78M0.02%new13F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND187,603$6.94M0.01%+19,84713F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/181,998$6.73M<0.01%-22,50013F-HRTimelineGroup
Public Sector Pension Investment Board178,722$6.61M0.02%+5,81713F-HRTimeline
SCHWARTZ INVESTMENT COUNSEL INC175,000$6.47M0.23%-515,00013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC173,164$6.41M<0.01%-36,09413F-HRTimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…172,964$6.4M0.01%+171,10713F-HRTimelineGroup
ARMISTICE CAPITAL, LLC168,000$6.22M0.21%new13F-HRTimeline
Tejara Capital Ltd162,300$6.01M1.98%new13F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC159,199$5.89M<0.01%+87,58813F-HRTimelineGroup
Portolan Capital Management, LLCin group Portolan Capital Management, …159,026$5.88M0.31%new13F-HRTimelineGroup
Barton Investment Management158,644$5.87M0.74%-1,56013F-HRTimeline
RENAISSANCE GROUP LLC156,812$5.8M0.24%+29,35113F-HRTimeline
SCALAR GAUGE MANAGEMENT, LLC153,143$5.67M5.47%-374,64613F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd147,170$5.45M0.09%new13F-HRTimelineGroup
NICHOLAS COMPANY, INC.141,155$5.22M0.1%-73513F-HRTimeline
NATIXISin group Natixis Investment Managers135,822$5.03M0.02%new13F-HRTimelineGroup
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co134,975$4.99M0.01%+25,28813F-HRTimelineGroup
RHUMBLINE ADVISERS131,600$4.87M<0.01%+1,40713F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…124,085$4.59M0.05%-29813F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc118,388$4.38M<0.01%-12,26413F-HRTimelineGroup
Nuveen, LLCin group TIAA117,175$4.34M<0.01%+61413F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…115,536$4.27M0.01%+8,35913F-HRTimeline
Select Equity Group, L.P.112,252$4.15M0.02%-162,28813F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO105,267$3.9M<0.01%-110,11013F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.67,077$3.71M<0.01%+1,63013F-HRTimeline
Swiss National Bank100,000$3.7M<0.01%-3,70013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC85,741$3.17M<0.01%-1,186,96713F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP85,625$3.17M<0.01%new13F-HRTimelineGroup
Granite Investment Partners, LLC82,990$3.07M0.19%+2,62613F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC82,037$3.04M<0.01%-117,82313F-HRTimelineGroup
Bullseye Asset Management LLC69,042$2.56M1.48%013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC68,526$2.54M<0.01%+56,11713F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC66,656$2.47M<0.01%-9,09013F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC66,285$2.45M<0.01%-178,56113F-HRTimelineGroup
READYSTATE ASSET MANAGEMENT LP66,080$2.44M0.14%-4,16213F-HRTimeline
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC62,835$2.32M0.01%-58413F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…62,541$2.31M<0.01%+11,70613F-HRTimeline
Ewing Morris & Co. Investment Partners …60,000$2.22M1%+52,50013F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC58,544$2.17M<0.01%-29713F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC51,596$1.91M<0.01%+4,65113F-HRTimelineGroup
HARBOR CAPITAL ADVISORS, INC.50,330$1.86M0.15%new13F-HRTimeline
Shay Capital LLC49,820$1.84M0.26%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\47,614$1.76M<0.01%+4,90313F-HRTimelineGroup
ExodusPoint Capital Management, LP47,230$1.75M0.02%new13F-HRTimeline
Redmond Asset Management, LLC44,570$1.65M0.45%-2,69213F-HRTimeline
HRT FINANCIAL LP42,978$1.59M<0.01%-153,36813F-HRTimeline
HUSSMAN STRATEGIC ADVISORS, INC.42,000$1.55M0.34%new13F-HRTimeline
Quantinno Capital Management LP41,647$1.54M<0.01%+27,58613F-HRTimeline
WESBANCO BANK INC41,400$1.53M0.04%+8,40013F-HRTimeline
Amundiin group Amundi37,191$1.38M<0.01%+9,64313F-HRTimelineGroup
NEXPOINT ASSET MANAGEMENT, L.P.in group NEXPOINT ASSET MANAGEMENT, L.…35,450$1.31M0.09%013F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…33,354$1.23M<0.01%-74,38613F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD33,240$1.23M<0.01%-30,56113F-HRTimeline
Holocene Advisors, LP32,875$1.22M<0.01%+17,55413F-HRTimeline
Bridge City Capital, LLC30,799$1.14M0.32%-19713F-HRTimeline
CITIGROUP INCin group CITIGROUP INC29,189$1.08M<0.01%+34213F-HRTimelineGroup
Man Group plcin group Man Group plc28,534$1.06M<0.01%+17513F-HRTimelineGroup
Chicago Capital, LLC27,537$1.02M0.03%013F-HRTimeline
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA27,199$1.01M<0.01%+4,65613F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…27,116$1M0.01%-2,02013F-HRTimelineGroup
Creative Planningin group Creative Planning26,871$994K<0.01%+11,98113F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…26,491$980K<0.01%013F-HRTimeline
NOMURA HOLDINGS INCin group NOMURA ASSET MANAGEMENT CO LTD26,466$979K0.01%-45413F-HRTimelineGroup
Illinois Municipal Retirement Fund24,727$915K0.01%-2,67213F-HRTimeline
State of Alaska, Department of Revenue24,667$912K0.01%-79913F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…24,288$899K<0.01%+8,55213F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN23,658$875K<0.01%-68,25513F-HR/ATimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson23,569$873K<0.01%013F-HR/ATimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…23,304$862K<0.01%-91313F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …22,490$832K<0.01%-1,23513F-HRTimelineGroup
MACKENZIE FINANCIAL CORP22,421$830K<0.01%new13F-HRTimeline
Louisiana State Employees Retirement Sy…22,200$821K0.01%-70013F-HRTimeline
Verition Fund Management LLC21,820$807K0.01%-47,24513F-HRTimeline
Handelsbanken Fonder AB21,600$799K<0.01%+8,00013F-HRTimeline
P SCHOENFELD ASSET MANAGEMENT LP21,500$796K0.63%new13F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC19,712$729K<0.01%+80013F-HRTimeline
INCEPTIONR LLC19,290$714K0.17%new13F-HRTimeline
IMC-Chicago, LLC18,216$674K0.01%new13F-HRTimeline
DRW Securities, LLC16,894$625K0.03%new13F-HRTimeline
Numerai GP LLC16,580$613K0.06%new13F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.16,525$611K<0.01%+3,08013F-HRTimelineGroup
LAVELLE CAPITAL LP16,119$596K0.37%013F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …15,628$578K<0.01%-1,60113F-HRTimelineGroup
Cresset Asset Management, LLC15,589$577K<0.01%-44913F-HRTimeline
SG Americas Securities, LLC15,275$565K<0.01%+5913F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding15,100$559K+10,199Timeline
AMALGAMATED BANK14,454$535K<0.01%-13613F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…13,885$514K<0.01%-1,71213F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM13,889$514K<0.01%-78013F-HRTimeline
Police & Firemen's Retirement System of…13,802$511K<0.01%013F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC13,322$493K0.01%-19713F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…12,497$463K<0.01%-50013F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…12,357$457K<0.01%-1413F-HRTimeline
LPL Financial LLC12,076$447K<0.01%-48913F-HRTimeline
TD Waterhouse Canada Inc.12,200$445K<0.01%+2,70013F-HRTimeline
Brooklyn Investment Group11,936$442K0.01%new13F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…11,755$435K<0.01%+6,02713F-HRTimelineGroup
CIM INVESTMENT MANAGEMENT INC11,660$431K0.12%+5,52113F-HRTimeline
State of Tennessee, Department of Treas…11,561$428K<0.01%013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND11,475$425K0.01%013F-HRTimeline
KLP KAPITALFORVALTNING AS11,200$414K<0.01%013F-HRTimeline
Yorktown Management & Research Co Inc11,000$407K0.34%+5,50013F-HRTimeline
State of Wyoming10,912$404K0.05%+48613F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC10,898$403K<0.01%-7,98613F-HRTimeline
BLAIR WILLIAM & CO/IL10,573$391K<0.01%-74,45013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP10,322$382K<0.01%+1,67213F-HRTimelineGroup
Cetera Investment Advisers9,798$363K<0.01%-4,51113F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC9,793$362K<0.01%new13F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…9,644$357K<0.01%-2,54913F-HRTimelineGroup
CenterBook Partners LP8,829$327K0.02%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC8,806$326K<0.01%-68713F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC8,698$322K<0.01%+7713F-HRTimelineGroup
Keebeck Wealth Management8,664$321K0.04%+1,03213F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…8,651$320K<0.01%+93013F-HRTimelineGroup
HANTZ FINANCIAL SERVICES, INC.8,436$312K<0.01%+6,99713F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
ProShare Advisors LLC7,920$293K<0.01%-2,31613F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV7,813$289K<0.01%+3,89913F-HRTimeline
Caption Management, LLC7,761$287K0.01%new13F-HRTimeline
Blue Trust, Inc.7,516$278K<0.01%+35913F-HRTimeline
Evanson Asset Management, LLC7,350$272K0.01%013F-HRTimeline
Maryland State Retirement & Pension Sys…7,276$269K0.01%013F-HRTimeline
TWO SIGMA SECURITIES, LLC7,024$260K0.03%-29513F-HRTimeline
Pacific Park Financial, Inc.6,726$249K0.16%013F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …6,601$244K<0.01%013F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS6,120$226K<0.01%+1,06113F-HRTimeline
MCMORGAN & CO LLC6,000$222K0.04%-2,98513F-HRTimeline
MIRABELLA FINANCIAL SERVICES LLP5,877$217K0.02%-4,12313F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…5,843$216K<0.01%013F-HRTimeline
Empowered Funds, LLC5,683$210K<0.01%-13713F-HR/ATimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…5,476$203K<0.01%-55813F-HRTimelineGroup
FNY Investment Advisers, LLC5,220$193K0.08%-28013F-HRTimeline
Centiva Capital, LP5,104$189K0.01%+10413F-HRTimeline
Ensign Peak Advisors, Inc4,725$175K<0.01%-13813F-HR/ATimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…4,069$151K<0.01%-28313F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,938$146K<0.01%+34313F-HRTimelineGroup
CWM, LLCin group CWM, LLC3,814$141K<0.01%+2,56113F-HRTimelineGroup
ATLAS CAPITAL ADVISORS INC.3,520$130K0.01%-1,13513F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\2,552$94.4K<0.01%-3,26313F-HRTimelineGroup
Bayforest Capital Ltd2,514$93K0.1%+1,79213F-HRTimeline
Pacer Advisors, Inc.2,468$91K<0.01%+25113F-HR/ATimeline
Parallel Advisors, LLC2,030$75.1K<0.01%+1,67213F-HR/ATimeline
BROADWATER CAPITAL MANAGEMENT LLC1,300$71.9K0.05%013F-HRTimeline
Freestone Grove Partners LP1,765$65.3K<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,713$63.4K<0.01%-42313F-HRTimelineGroup
GAMMA Investing LLC1,669$61.8K<0.01%-3513F-HRTimeline
KBC Group NVin group KBC Group NV1,589$59K<0.01%013F-HRTimelineGroup
Pinnacle Wealth Planning Services, Inc.1,307$48.4K<0.01%-69713F-HRTimeline
Asset Management One Co., Ltd.1,198$44.3K<0.01%-27113F-HRTimeline
QUADRANT CAPITAL GROUP LLC1,110$41.1K<0.01%-1,27613F-HR/ATimeline
Leonteq Securities AG1,086$40.2K<0.01%+98913F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK981$36.3K<0.01%-23513F-HRTimelineGroup
Optiver Holding B.V.in group Optiver Holding B.V.975$36.1K<0.01%+96813F-HR/ATimelineGroup
Salomon & Ludwin, LLC960$34.8K<0.01%+53913F-HRTimeline
Versant Capital Management, Inc917$33.9K<0.01%+26813F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.908$33.6K<0.01%-4013F-HRTimelineGroup
Farther Finance Advisors, LLC788$28.7K<0.01%+71313F-HRTimeline
MAI Capital Management761$28.2K<0.01%+5413F-HRTimeline