Who owns BIRK (BIRK)
Which tracked institutional funds hold BIRK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BIRK 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
51 tracked funds added or opened BIRK while 96 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
BIRK’s largest tracked holder by dollar value, Catterton Management Company, L.L.C., sizes it at 98.7% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 98.6pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BIRK 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 230 tracked filers holding BIRK, 135 increased or opened the position and 149 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 BIRK 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 18
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC$92M
- Anomaly Capital Management, LP$51M
- Freestone Grove Partners LP$31M
- Rheos Capital Works Inc.$13M
- Potrero Capital Research LLC$11M
- QVT Financial LP$10M
Full exits 36
- COOPER CREEK PARTNERS MANAGEMENT LLC$30M
- Jain Global LLC$22M
- VOYA INVESTMENT MANAGEMENT LLC$18M
- Tredje AP-fonden$17M
- RENAISSANCE TECHNOLOGIES LLC$17M
- BURKEHILL GLOBAL MANAGEMENT, LP$16M
Largest adds
- T. Rowe Price Investment Management, Inc.$168M
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/$73M
- UBS Group AG$45M
- FMR LLC$29M
- CITADEL ADVISORS LLC$21M
- DIMENSIONAL FUND ADVISORS LP$19M
Largest trims
- Catterton Management Company, L.L.C.$1.1B
- PRICE T ROWE ASSOCIATES INC /MD/$50M
- Nuveen, LLC$49M
- Point72 Asset Management, L.P.$46M
- BANK OF AMERICA CORP /DE/$31M
- MORGAN STANLEY$25M
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 |
|---|---|---|---|---|
| Catterton Management Company, L.L.C. trimmed | 99,416,513 | $3.6B | 51.4% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 11,817,401 | $423M | 6.1% | 2026-Q1 |
| BAMCO INC /NY/ added | 9,366,068 | $336M | 4.8% | 2026-Q1 |
| FMR LLC added | 4,882,756 | $175M | 2.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 4,049,787 | $145M | 2.1% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 3,180,948 | $114M | 1.6% | 2026-Q1 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC new | 2,575,402 | $92M | 1.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 2,504,263 | $90M | 1.3% | 2026-Q1 |
| WESTFIELD CAPITAL MANAGEMENT CO LP added | 2,338,779 | $84M | 1.2% | 2026-Q1 |
| UBS Group AG added | 2,302,892 | $83M | 1.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,978,858 | $71M | 1.0% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 1,902,618 | $68M | 1.0% | 2026-Q1 |
| Swedbank AB added | 1,600,000 | $57M | 0.8% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 1,562,241 | $56M | 0.8% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 1,511,817 | $54M | 0.8% | 2026-Q1 |
| Anomaly Capital Management, LP new | 1,415,235 | $51M | 0.7% | 2026-Q1 |
| NORGES BANK added | 1,018,739 | $47M | 0.7% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 1,113,648 | $40M | 0.6% | 2026-Q1 |
| BlackRock, Inc. trimmed | 1,032,323 | $37M | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 887,311 | $32M | 0.5% | 2026-Q1 |
| Freestone Grove Partners LP new | 865,425 | $31M | 0.4% | 2026-Q1 |
| Artisan Partners Limited Partnership trimmed | 857,310 | $31M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 799,375 | $29M | 0.4% | 2026-Q1 |
| Hook Mill Capital Partners, LP added | 771,336 | $28M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 765,230 | $27M | 0.4% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 722,662 | $26M | 0.4% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 700,000 | $25M | 0.4% | 2026-Q1 |
| TD Asset Management Inc trimmed | 696,160 | $25M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 660,308 | $24M | 0.3% | 2026-Q1 |
| PRIMECAP MANAGEMENT CO/CA/ added | 597,200 | $21M | 0.3% | 2026-Q1 |
| RICE HALL JAMES & ASSOCIATES, LLC added | 590,368 | $21M | 0.3% | 2026-Q1 |
| STATE STREET CORP trimmed | 562,884 | $20M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 488,654 | $18M | 0.3% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 474,241 | $17M | 0.2% | 2026-Q1 |
| FIL Ltd added | 385,000 | $14M | 0.2% | 2026-Q1 |
| Rheos Capital Works Inc. new | 350,000 | $13M | 0.2% | 2026-Q1 |
| Woodline Partners LP added | 339,368 | $12M | 0.2% | 2026-Q1 |
| Potrero Capital Research LLC new | 304,339 | $11M | 0.2% | 2026-Q1 |
| PLATINUM INVESTMENT MANAGEMENT LTD added | 275,000 | $10M | 0.1% | 2026-Q1 |
| QVT Financial LP new | 273,538 | $10M | 0.1% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 257,752 | $9M | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp | 246,400 | $9M | 0.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 240,362 | $9M | 0.1% | 2026-Q1 |
| CITIGROUP INC added | 238,704 | $9M | 0.1% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 232,459 | $8M | 0.1% | 2026-Q1 |
| Pier Capital, LLC new | 220,241 | $8M | 0.1% | 2026-Q1 |
| Verition Fund Management LLC trimmed | 209,063 | $7M | 0.1% | 2026-Q1 |
| Cullen/Frost Bankers, Inc. trimmed | 201,413 | $7M | 0.1% | 2026-Q1 |
| Blue Grotto Capital, LLC trimmed | 200,000 | $7M | 0.1% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 191,012 | $7M | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 185,974 | $7M | 0.1% | 2026-Q1 |
| Crestwood Capital Management, L.P. added | 183,332 | $7M | 0.1% | 2026-Q1 |
| Exane Asset Management trimmed | 153,015 | $6M | 0.1% | 2026-Q1 |
| KORNITZER CAPITAL MANAGEMENT INC /KS added | 170,525 | $6M | 0.1% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 166,636 | $6M | 0.1% | 2026-Q1 |
| Korea Investment CORP trimmed | 151,961 | $5M | 0.1% | 2026-Q1 |
| Lombard Odier Asset Management (Europe) Ltd trimmed | 145,640 | $5M | 0.1% | 2026-Q1 |
| Unisphere Establishment trimmed | 142,200 | $5M | 0.1% | 2026-Q1 |
| BW Gestao de Investimentos Ltda. trimmed | 139,100 | $5M | 0.1% | 2026-Q1 |
| Nuveen, LLC trimmed | 132,719 | $5M | 0.1% | 2026-Q1 |
| AGF MANAGEMENT LTD added | 2,089,320 | $95M | 1.4% | 2025-Q3 stale |
| Greenvale Capital LLP trimmed | 1,350,000 | $66M | 1.0% | 2025-Q2 stale |
| Alua Capital Management LP added | 1,187,862 | $54M | 0.8% | 2025-Q3 stale |
| MENORA MIVTACHIM HOLDINGS LTD. added | 1,071,000 | $48M | 0.7% | 2025-Q3 stale |
| Durable Capital Partners LP added | 886,660 | $40M | 0.6% | 2025-Q3 stale |
| Broad Bay Capital Management, LP added | 674,252 | $31M | 0.4% | 2025-Q1 stale |
| COOPER CREEK PARTNERS MANAGEMENT LLC new | 743,036 | $30M | 0.4% | 2025-Q4 stale |
| LBP AM SA added | 606,309 | $27M | 0.4% | 2025-Q3 stale |
| Fortress Investment Group LLC added | 600,000 | $27M | 0.4% | 2025-Q3 stale |
| Cartenna Capital, LP new | 550,000 | $25M | 0.4% | 2025-Q1 stale |
| Jain Global LLC added | 529,196 | $22M | 0.3% | 2025-Q4 stale |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 431,408 | $18M | 0.3% | 2025-Q4 stale |
| Tredje AP-fonden trimmed | 414,400 | $17M | 0.2% | 2025-Q4 stale |
| RENAISSANCE TECHNOLOGIES LLC added | 411,300 | $17M | 0.2% | 2025-Q4 stale |
| BURKEHILL GLOBAL MANAGEMENT, LP | 400,000 | $16M | 0.2% | 2025-Q4 stale |
| J. Goldman & Co LP added | 374,314 | $15M | 0.2% | 2025-Q4 stale |
| MANE GLOBAL CAPITAL MANAGEMENT LP trimmed | 296,593 | $15M | 0.2% | 2025-Q2 stale |
| Ranger Investment Management, L.P. trimmed | 318,678 | $13M | 0.2% | 2025-Q4 stale |
| Tairen Capital Ltd | 276,200 | $12M | 0.2% | 2025-Q3 stale |
| BWCP, LP added | 266,749 | $11M | 0.2% | 2025-Q4 stale |
| Driehaus Capital Management LLC trimmed | 237,048 | $11M | 0.2% | 2025-Q1 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 261,675 | $11M | 0.2% | 2025-Q4 stale |
| Schonfeld Strategic Advisors LLC added | 259,906 | $11M | 0.2% | 2025-Q4 stale |
| Longaeva Partners L.P. trimmed | 256,156 | $10M | 0.2% | 2025-Q4 stale |
| TWINBEECH CAPITAL LP trimmed | 231,501 | $10M | 0.2% | 2025-Q3 stale |
| Point72 Europe (London) LLP new | 217,871 | $10M | 0.1% | 2025-Q3 stale |
| Migdal Insurance & Financial Holdings Ltd. new | 210,000 | $10M | 0.1% | 2025-Q1 stale |
| RIPOSTE CAPITAL LLC new | 200,000 | $9M | 0.1% | 2025-Q1 stale |
| Ghisallo Capital Management LLC trimmed | 200,000 | $9M | 0.1% | 2025-Q3 stale |
| VANGUARD GROUP INC added | 201,458 | $8M | 0.1% | 2025-Q4 stale |
| Wealth High Governance Capital Ltda trimmed | 180,000 | $8M | 0.1% | 2025-Q3 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 173,372 | $7M | 0.1% | 2025-Q4 stale |
| PEREGRINE CAPITAL MANAGEMENT LLC trimmed | 164,583 | $7M | 0.1% | 2025-Q4 stale |
| HRT FINANCIAL LP added | 156,836 | $6M | 0.1% | 2025-Q4 stale |
| AXA S.A. trimmed | 117,534 | $6M | 0.1% | 2025-Q2 stale |
| Point72 Hong Kong Ltd added | 118,845 | $5M | 0.1% | 2025-Q3 stale |
| Roubaix Capital, LLC added | 130,625 | $5M | 0.1% | 2025-Q4 stale |
| AXA Investment Managers S.A. new | 117,534 | $5M | 0.1% | 2025-Q3 stale |
| ExodusPoint Capital Management, LP trimmed | 126,343 | $5M | 0.1% | 2025-Q4 stale |
| Nebula Research & Development LLC added | 97,846 | $5M | 0.1% | 2025-Q2 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.