Who owns API
Which tracked institutional funds hold API, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See API company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 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
13 tracked funds added or opened API while 7 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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
API’s largest tracked holder by dollar value, SUSQUEHANNA INTERNATIONAL GROUP, LLP, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in API 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 2026-Q1 and 2026-Q2, across 54 tracked filers holding API, 24 increased or opened the position and 32 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 API between the 2026-Q1 and 2026-Q2 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 2
- Clearline Capital LP$3M
- MILLENNIUM MANAGEMENT LLC$1M
Full exits 3
- Neumann Advisory Hong Kong Ltd$4M
- CloudAlpha Capital Management Limited/Hong Kong$2M
- ACADIAN ASSET MANAGEMENT LLC$2M
Largest adds
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$3M
- Harber Asset Management LLC$1M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$1M
- RENAISSANCE TECHNOLOGIES LLC$1M
- TMT General Partner Ltd$1M
- HHLR ADVISORS, LTD.$944K
Largest trims
- Yunqi Capital Ltd$3M
- UBS Group AG$3M
- XTX Topco Ltd$325K
- MORGAN STANLEY$305K
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 |
|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 7,484,011 | $30M | 25.1% | 2026-Q2 |
| TMT General Partner Ltd | 2,352,651 | $9M | 7.9% | 2026-Q2 |
| HHLR ADVISORS, LTD. | 2,098,553 | $8M | 7.0% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC | 1,783,785 | $7M | 6.0% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 1,040,144 | $4M | 3.5% | 2026-Q2 |
| Yunqi Capital Ltd trimmed | 964,203 | $4M | 3.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 866,109 | $3M | 2.9% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 739,500 | $3M | 2.5% | 2026-Q2 |
| Yiheng Capital Management, L.P. | 725,795 | $3M | 2.4% | 2026-Q2 |
| Clearline Capital LP added | 636,960 | $3M | 2.1% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 509,002 | $2M | 1.7% | 2026-Q2 |
| Harber Asset Management LLC added | 506,189 | $2M | 1.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 375,567 | $2M | 1.3% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 270,134 | $1M | 0.9% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 255,431 | $1M | 0.9% | 2026-Q2 |
| PEAK6 LLC trimmed | 212,634 | $848K | 0.7% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 201,474 | $804K | 0.7% | 2026-Q2 |
| UBS Group AG trimmed | 159,464 | $636K | 0.5% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 158,691 | $633K | 0.5% | 2026-Q2 |
| Oasis Management Co Ltd. | 153,885 | $614K | 0.5% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 136,797 | $573K | 0.5% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 133,016 | $531K | 0.4% | 2026-Q2 |
| STATE STREET CORP trimmed | 123,919 | $494K | 0.4% | 2026-Q2 |
| Optimus Prime Fund Management Co., Ltd. | 111,234 | $444K | 0.4% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 107,923 | $444K | 0.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. | 94,386 | $377K | 0.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 83,895 | $335K | 0.3% | 2026-Q2 |
| Invesco Ltd. added | 71,755 | $286K | 0.2% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey added | 63,272 | $252K | 0.2% | 2026-Q2 |
| E Fund Management Co., Ltd. | 54,555 | $218K | 0.2% | 2026-Q2 |
| XTX Topco Ltd trimmed | 49,890 | $199K | 0.2% | 2026-Q2 |
| Headlands Technologies LLC added | 48,795 | $195K | 0.2% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 41,520 | $166K | 0.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 40,567 | $162K | 0.1% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 30,430 | $121K | 0.1% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO added | 25,381 | $101K | 0.1% | 2026-Q2 |
| PRELUDE CAPITAL MANAGEMENT, LLC added | 20,001 | $80K | 0.1% | 2026-Q2 |
| AXQ CAPITAL, LP new | 13,802 | $55K | 0.0% | 2026-Q2 |
| Federation des caisses Desjardins du Quebec added | 13,280 | $53K | 0.0% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS added | 10,997 | $44K | 0.0% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND | 9,238 | $37K | 0.0% | 2026-Q2 |
| BARCLAYS PLC trimmed | 7,409 | $30K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 5,891 | $24K | 0.0% | 2026-Q2 |
| RHUMBLINE ADVISERS | 1,782 | $7K | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. trimmed | 658 | $3K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 178 | $709 | 0.0% | 2026-Q2 |
| Purpose Unlimited Inc. | 80 | $324 | 0.0% | 2026-Q2 |
| Eurizon Capital SGR S.p.A. | 54 | $215 | 0.0% | 2026-Q2 |
| EverSource Wealth Advisors, LLC trimmed | 31 | $124 | 0.0% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ new | 13 | $52 | 0.0% | 2026-Q2 |
| CITIGROUP INC trimmed | 6 | $24 | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd added | 4 | $16 | 0.0% | 2026-Q2 |
| HUNTINGTON NATIONAL BANK | 1 | $4 | 0.0% | 2026-Q2 |
| NewEdge Advisors, LLC trimmed | 0 | — | 0.0% | 2026-Q2 |
| Neumann Advisory Hong Kong Ltd trimmed | 1,073,970 | $4M | 3.2% | 2026-Q1 stale (1 quarter behind) |
| CloudAlpha Capital Management Limited/Hong Kong | 645,700 | $2M | 1.9% | 2026-Q1 stale (1 quarter behind) |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 624,484 | $2M | 1.9% | 2026-Q1 stale (1 quarter behind) |
| GWN SECURITIES INC. new | 89,075 | $315K | 0.3% | 2026-Q1 stale (1 quarter behind) |
| GSA CAPITAL PARTNERS LLP trimmed | 39,415 | $140K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Quadrature Capital Ltd trimmed | 24,546 | $87K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| NOMURA HOLDINGS INC added | 18,367 | $65K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| HRT FINANCIAL LP added | 15,903 | $56K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Squarepoint Ops LLC trimmed | 12,291 | $44K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Welch Financial Planning, LLC new | 11,037 | $39K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| PharVision Advisers, LLC trimmed | 10,898 | $39K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| First Beijing Investment Ltd trimmed | 7,700 | $27K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| WELLS FARGO & COMPANY/MN | 100 | $354 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| JONES FINANCIAL COMPANIES LLLP new | 52 | $177 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Sunbelt Securities, Inc. | 30 | $106 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| ROYAL BANK OF CANADA trimmed | 16 | — | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Fideuram Asset Management (Ireland) dac new | 949,677 | $5M | 4.5% | 2025-Q4 stale (2 quarters behind) |
| Perseverance Asset Management International new | 700,000 | $3M | 2.4% | 2025-Q4 stale (2 quarters behind) |
| NOTABLE CAPITAL MANAGEMENT, L.L.C. trimmed | 371,472 | $2M | 1.3% | 2025-Q4 stale (2 quarters behind) |
| MARSHALL WACE, LLP trimmed | 243,825 | $992K | 0.8% | 2025-Q4 stale (2 quarters behind) |
| TWO SIGMA ADVISERS, LP added | 145,900 | $594K | 0.5% | 2025-Q4 stale (2 quarters behind) |
| Centiva Capital, LP new | 29,487 | $120K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| BOOTHBAY FUND MANAGEMENT, LLC new | 17,583 | $72K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| Quarry LP added | 5,602 | $23K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| SIMPLEX TRADING, LLC trimmed | 5,125 | $21K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Tower Research Capital LLC (TRC) added | 2,948 | $12K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| BANK OF AMERICA CORP /DE/ trimmed | 2,616 | $11K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Leonteq Securities AG | 1,119 | $5K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Sarver Vrooman Wealth Advisors new | 585 | $2K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| IMA Advisory Services, Inc. new | 72 | $293 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| HCEP Management Ltd added | 622,770 | $2M | 2.0% | 2025-Q3 stale (3 quarters behind) |
| E Fund Management (Hong Kong) Co., Ltd. new | 138,392 | $529K | 0.4% | 2025-Q3 stale (3 quarters behind) |
| COATUE MANAGEMENT LLC | 93,700 | $358K | 0.3% | 2025-Q3 stale (3 quarters behind) |
| Cubist Systematic Strategies, LLC trimmed | 78,802 | $301K | 0.3% | 2025-Q3 stale (3 quarters behind) |
| Jump Financial, LLC new | 60,533 | $231K | 0.2% | 2025-Q3 stale (3 quarters behind) |
| West Branch Capital LLC | 50 | $179 | 0.0% | 2025-Q3 stale (3 quarters behind) |
| MY.Alpha Management HK Advisors Ltd trimmed | 708,822 | $3M | 2.3% | 2025-Q2 stale (4 quarters behind) |
| Walleye Capital LLC new | 119,996 | $457K | 0.4% | 2025-Q2 stale (4 quarters behind) |
| Rafferty Asset Management, LLC trimmed | 86,393 | $329K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| Parcion Private Wealth LLC | 24,000 | $91K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| QRG CAPITAL MANAGEMENT, INC. added | 11,027 | $42K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Mirae Asset Global Investments Co., Ltd. trimmed | 2,112 | $8K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
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.