Who owns BLKB (BLKB)
Which tracked institutional funds hold BLKB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BLKB company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on BLKB is one-sided between 2025-Q4 and 2026-Q1: 43 added or opened and 130 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
BLKB’s largest tracked holder by dollar value, CLEARLAKE CAPITAL GROUP, L.P., sizes it at 55.3% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 55.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BLKB divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 293 tracked filers holding BLKB, 160 increased or opened the position and 149 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in BLKB between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 23
- VANGUARD PORTFOLIO MANAGEMENT LLC$116M
- VANGUARD CAPITAL MANAGEMENT LLC$75M
- VANGUARD FIDUCIARY TRUST CO$10M
- Robeco Institutional Asset Management B.V.$6M
- TWO SIGMA INVESTMENTS, LP$6M
- Numerai GP LLC$2M
Full exits 13
- VANGUARD GROUP INC$321M
- Trexquant Investment LP$5M
- Edgestream Partners, L.P.$4M
- FRANKLIN RESOURCES INC$4M
- FRED ALGER MANAGEMENT, LLC$2M
- COMERICA BANK$2M
Largest adds
- Qube Research & Technologies Ltd$10M
- GOLDMAN SACHS GROUP INC$7M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$3M
- VICTORY CAPITAL MANAGEMENT INC$2M
- Point72 Asset Management, L.P.$2M
- Y-Intercept (Hong Kong) Ltd$2M
Largest trims
- NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO$250M
- CLEARLAKE CAPITAL GROUP, L.P.$241M
- BlackRock, Inc.$116M
- MORGAN STANLEY$109M
- GENEVA CAPITAL MANAGEMENT LLC$41M
- STATE STREET CORP$37M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| CLEARLAKE CAPITAL GROUP, L.P. | 9,751,837 | $377M | 17.4% | 2026-Q1 |
| BlackRock, Inc. added | 4,766,787 | $184M | 8.5% | 2026-Q1 |
| MORGAN STANLEY trimmed | 4,265,345 | $165M | 7.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,011,703 | $116M | 5.4% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,943,516 | $75M | 3.5% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 1,555,833 | $60M | 2.8% | 2026-Q1 |
| STATE STREET CORP added | 1,515,036 | $58M | 2.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 971,119 | $38M | 1.7% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 951,262 | $37M | 1.7% | 2026-Q1 |
| NORGES BANK added | 490,621 | $30M | 1.4% | 2026-Q1 |
| GENEVA CAPITAL MANAGEMENT LLC trimmed | 719,100 | $28M | 1.3% | 2026-Q1 |
| Van Berkom & Associates Inc. trimmed | 718,655 | $28M | 1.3% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 684,507 | $26M | 1.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 662,349 | $26M | 1.2% | 2026-Q1 |
| PALISADE CAPITAL MANAGEMENT, LP added | 577,370 | $22M | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 572,831 | $22M | 1.0% | 2026-Q1 |
| SHAPIRO CAPITAL MANAGEMENT LLC added | 516,630 | $20M | 0.9% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 495,730 | $19M | 0.9% | 2026-Q1 |
| P2 Capital Partners, LLC trimmed | 482,874 | $19M | 0.9% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 473,341 | $18M | 0.8% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 405,331 | $16M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 360,414 | $14M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 351,835 | $14M | 0.6% | 2026-Q1 |
| Clearline Capital LP trimmed | 350,209 | $14M | 0.6% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 344,369 | $13M | 0.6% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 317,738 | $12M | 0.6% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 312,992 | $12M | 0.6% | 2026-Q1 |
| Public Sector Pension Investment Board added | 268,758 | $10M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 257,484 | $10M | 0.5% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 236,476 | $9M | 0.4% | 2026-Q1 |
| Tributary Capital Management, LLC trimmed | 227,346 | $9M | 0.4% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 223,955 | $9M | 0.4% | 2026-Q1 |
| FMR LLC added | 223,024 | $9M | 0.4% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO trimmed | 212,037 | $8M | 0.4% | 2026-Q1 |
| UBS Group AG added | 211,074 | $8M | 0.4% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 178,829 | $7M | 0.3% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC added | 169,986 | $7M | 0.3% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. new | 162,229 | $6M | 0.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 162,049 | $6M | 0.3% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 160,569 | $6M | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 151,895 | $6M | 0.3% | 2026-Q1 |
| Hillsdale Investment Management Inc. added | 138,100 | $5M | 0.2% | 2026-Q1 |
| LORD, ABBETT & CO. LLC added | 133,900 | $5M | 0.2% | 2026-Q1 |
| Calamos Advisors LLC | 133,042 | $5M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 129,538 | $5M | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 127,152 | $5M | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 76,617 | $5M | 0.2% | 2026-Q1 |
| SG Capital Management LLC trimmed | 122,966 | $5M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 114,304 | $4M | 0.2% | 2026-Q1 |
| Man Group plc trimmed | 112,233 | $4M | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 98,253 | $4M | 0.2% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 97,855 | $4M | 0.2% | 2026-Q1 |
| Nuveen, LLC trimmed | 93,558 | $4M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 91,089 | $4M | 0.2% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 89,394 | $3M | 0.2% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. added | 83,320 | $3M | 0.1% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 81,446 | $3M | 0.1% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO added | 78,596 | $3M | 0.1% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P added | 75,695 | $3M | 0.1% | 2026-Q1 |
| Swiss National Bank trimmed | 75,653 | $3M | 0.1% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 75,636 | $3M | 0.1% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 71,601 | $3M | 0.1% | 2026-Q1 |
| Sone Capital Management, LLC trimmed | 70,196 | $3M | 0.1% | 2026-Q1 |
| Triodos Investment Management BV added | 66,000 | $3M | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 63,434 | $2M | 0.1% | 2026-Q1 |
| Numerai GP LLC new | 63,159 | $2M | 0.1% | 2026-Q1 |
| KESTREL INVESTMENT MANAGEMENT CORP trimmed | 61,050 | $2M | 0.1% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 56,720 | $2M | 0.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 55,910 | $2M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 53,108 | $2M | 0.1% | 2026-Q1 |
| BECKER CAPITAL MANAGEMENT INC trimmed | 52,671 | $2M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM added | 52,188 | $2M | 0.1% | 2026-Q1 |
| CORBYN INVESTMENT MANAGEMENT INC/MD added | 51,418 | $2M | 0.1% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 50,921 | $2M | 0.1% | 2026-Q1 |
| HARBOR CAPITAL ADVISORS, INC. added | 50,183 | $2M | 0.1% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 49,810 | $2M | 0.1% | 2026-Q1 |
| Aristides Capital LLC added | 48,186 | $2M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 47,589 | $2M | 0.1% | 2026-Q1 |
| CLARK ESTATES INC/NY added | 47,300 | $2M | 0.1% | 2026-Q1 |
| WEDGE CAPITAL MANAGEMENT L L P/NC added | 46,978 | $2M | 0.1% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 45,870 | $2M | 0.1% | 2026-Q1 |
| Brevan Howard Capital Management LP added | 45,662 | $2M | 0.1% | 2026-Q1 |
| Gotham Asset Management, LLC added | 45,152 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 5,062,520 | $321M | 14.8% | 2025-Q4 stale |
| Greenhouse Funds LLLP added | 802,904 | $52M | 2.4% | 2025-Q3 stale |
| ArrowMark Colorado Holdings LLC trimmed | 325,159 | $21M | 1.0% | 2025-Q3 stale |
| Indaba Capital Management, L.P. | 193,000 | $12M | 0.6% | 2025-Q2 stale |
| Penn Capital Management Company, LLC trimmed | 187,988 | $12M | 0.6% | 2025-Q2 stale |
| California Public Employees Retirement System trimmed | 163,365 | $10M | 0.5% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC trimmed | 85,732 | $6M | 0.3% | 2025-Q3 stale |
| Trexquant Investment LP added | 80,529 | $5M | 0.2% | 2025-Q4 stale |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC trimmed | 73,692 | $5M | 0.2% | 2025-Q3 stale |
| Edgestream Partners, L.P. added | 65,961 | $4M | 0.2% | 2025-Q4 stale |
| FRANKLIN RESOURCES INC added | 62,656 | $4M | 0.2% | 2025-Q4 stale |
| Corebridge Financial, Inc. trimmed | 61,040 | $4M | 0.2% | 2025-Q1 stale |
| AGF MANAGEMENT LTD added | 50,057 | $3M | 0.1% | 2025-Q3 stale |
| FRED ALGER MANAGEMENT, LLC trimmed | 37,053 | $2M | 0.1% | 2025-Q4 stale |
| HAWK RIDGE CAPITAL MANAGEMENT LP trimmed | 37,438 | $2M | 0.1% | 2025-Q1 stale |
| CREDIT INDUSTRIEL ET COMMERCIAL added | 33,112 | $2M | 0.1% | 2025-Q2 stale |
| AXA Investment Managers S.A. new | 32,611 | $2M | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.