Who owns API (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-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 API is one-sided between 2025-Q4 and 2026-Q1: 2 added or opened and 19 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
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 2025-Q4 and 2026-Q1, across 64 tracked filers holding API, 26 increased or opened the position and 38 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 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.
Full exits 5
- Fideuram Asset Management (Ireland) dac$5M
- Perseverance Asset Management International$3M
- NOTABLE CAPITAL MANAGEMENT, L.L.C.$2M
- MARSHALL WACE, LLP$992K
- TWO SIGMA ADVISERS, LP$594K
Largest adds
- UBS Group AG$3M
- Yiheng Capital Management, L.P.$398K
Largest trims
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$4M
- Neumann Advisory Hong Kong Ltd$3M
- ACADIAN ASSET MANAGEMENT LLC$2M
- Harber Asset Management LLC$1M
- MORGAN STANLEY$1M
- TMT General Partner Ltd$1M
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 | $26M | 21.3% | 2026-Q1 |
| TMT General Partner Ltd | 2,352,651 | $8M | 6.7% | 2026-Q1 |
| HHLR ADVISORS, LTD. | 2,098,553 | $7M | 6.0% | 2026-Q1 |
| Yunqi Capital Ltd | 2,005,300 | $7M | 5.7% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC trimmed | 1,783,785 | $6M | 5.1% | 2026-Q1 |
| Neumann Advisory Hong Kong Ltd trimmed | 1,073,970 | $4M | 3.1% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,062,252 | $4M | 3.0% | 2026-Q1 |
| UBS Group AG added | 970,874 | $3M | 2.8% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 776,206 | $3M | 2.2% | 2026-Q1 |
| Yiheng Capital Management, L.P. added | 725,795 | $3M | 2.1% | 2026-Q1 |
| CloudAlpha Capital Management Limited/Hong Kong | 645,700 | $2M | 1.8% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 624,484 | $2M | 1.8% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 496,129 | $2M | 1.4% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 389,029 | $1M | 1.1% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 330,715 | $1M | 0.9% | 2026-Q1 |
| PEAK6 LLC trimmed | 219,149 | $776K | 0.6% | 2026-Q1 |
| SEI INVESTMENTS CO trimmed | 212,111 | $751K | 0.6% | 2026-Q1 |
| Harber Asset Management LLC trimmed | 164,869 | $584K | 0.5% | 2026-Q1 |
| Oasis Management Co Ltd. | 153,885 | $545K | 0.4% | 2026-Q1 |
| XTX Topco Ltd added | 147,993 | $524K | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 134,716 | $477K | 0.4% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 133,168 | $471K | 0.4% | 2026-Q1 |
| STATE STREET CORP added | 125,843 | $445K | 0.4% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 119,129 | $422K | 0.3% | 2026-Q1 |
| Optimus Prime Fund Management Co., Ltd. | 111,234 | $394K | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 105,331 | $364K | 0.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 101,146 | $358K | 0.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. | 94,386 | $334K | 0.3% | 2026-Q1 |
| GWN SECURITIES INC. new | 89,075 | $315K | 0.3% | 2026-Q1 |
| Invesco Ltd. trimmed | 67,632 | $239K | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 60,138 | $213K | 0.2% | 2026-Q1 |
| E Fund Management Co., Ltd. trimmed | 54,555 | $193K | 0.2% | 2026-Q1 |
| Police & Firemen's Retirement System of New Jersey added | 53,078 | $188K | 0.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC | 44,594 | $158K | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 42,376 | $150K | 0.1% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP trimmed | 39,415 | $140K | 0.1% | 2026-Q1 |
| Headlands Technologies LLC trimmed | 38,774 | $137K | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 28,550 | $101K | 0.1% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO trimmed | 25,239 | $89K | 0.1% | 2026-Q1 |
| Quadrature Capital Ltd trimmed | 24,546 | $87K | 0.1% | 2026-Q1 |
| BARCLAYS PLC trimmed | 23,409 | $83K | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 21,417 | $76K | 0.1% | 2026-Q1 |
| NOMURA HOLDINGS INC added | 18,367 | $65K | 0.1% | 2026-Q1 |
| PRELUDE CAPITAL MANAGEMENT, LLC trimmed | 16,000 | $57K | 0.0% | 2026-Q1 |
| HRT FINANCIAL LP added | 15,903 | $56K | 0.0% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 12,291 | $44K | 0.0% | 2026-Q1 |
| Welch Financial Planning, LLC new | 11,037 | $39K | 0.0% | 2026-Q1 |
| PharVision Advisers, LLC trimmed | 10,898 | $39K | 0.0% | 2026-Q1 |
| CITIGROUP INC added | 10,094 | $36K | 0.0% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 9,238 | $33K | 0.0% | 2026-Q1 |
| Federation des caisses Desjardins du Quebec added | 8,998 | $32K | 0.0% | 2026-Q1 |
| First Beijing Investment Ltd trimmed | 7,700 | $27K | 0.0% | 2026-Q1 |
| EverSource Wealth Advisors, LLC added | 430 | $20K | 0.0% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 1,782 | $6K | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. trimmed | 673 | $2K | 0.0% | 2026-Q1 |
| OSAIC HOLDINGS, INC. | 160 | $566 | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN | 100 | $354 | 0.0% | 2026-Q1 |
| Purpose Unlimited Inc. | 80 | $282 | 0.0% | 2026-Q1 |
| Eurizon Capital SGR S.p.A. | 54 | $191 | 0.0% | 2026-Q1 |
| Yong Rong (HK) Asset Management Ltd added | 2,865,755 | $12M | 9.2% | 2025-Q1 stale |
| Fideuram Asset Management (Ireland) dac new | 949,677 | $5M | 4.3% | 2025-Q4 stale |
| Perseverance Asset Management International new | 700,000 | $3M | 2.3% | 2025-Q4 stale |
| MY.Alpha Management HK Advisors Ltd trimmed | 708,822 | $3M | 2.2% | 2025-Q2 stale |
| HCEP Management Ltd added | 622,770 | $2M | 1.9% | 2025-Q3 stale |
| NOTABLE CAPITAL MANAGEMENT, L.L.C. trimmed | 371,472 | $2M | 1.2% | 2025-Q4 stale |
| Hidden Lake Asset Management LP trimmed | 307,281 | $1M | 1.0% | 2025-Q1 stale |
| MARSHALL WACE, LLP trimmed | 243,825 | $992K | 0.8% | 2025-Q4 stale |
| BlackRock, Inc. new | 186,029 | $748K | 0.6% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP added | 145,900 | $594K | 0.5% | 2025-Q4 stale |
| E Fund Management (Hong Kong) Co., Ltd. added | 138,392 | $529K | 0.4% | 2025-Q3 stale |
| Walleye Capital LLC new | 119,996 | $457K | 0.4% | 2025-Q2 stale |
| Man Group plc added | 109,704 | $441K | 0.4% | 2025-Q1 stale |
| Garden State Investment Advisory Services LLC trimmed | 106,916 | $430K | 0.3% | 2025-Q1 stale |
| SELDON CAPITAL LP trimmed | 95,473 | $384K | 0.3% | 2025-Q1 stale |
| COATUE MANAGEMENT LLC | 93,700 | $358K | 0.3% | 2025-Q3 stale |
| Rafferty Asset Management, LLC trimmed | 86,393 | $329K | 0.3% | 2025-Q2 stale |
| MILLENNIUM MANAGEMENT LLC trimmed | 80,674 | $328K | 0.3% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC trimmed | 78,802 | $301K | 0.2% | 2025-Q3 stale |
| Jump Financial, LLC added | 60,533 | $231K | 0.2% | 2025-Q3 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 40,948 | $178K | 0.1% | 2025-Q1 stale |
| Engineers Gate Manager LP added | 39,562 | $159K | 0.1% | 2025-Q1 stale |
| DEUTSCHE BANK AG\ trimmed | 31,176 | $125K | 0.1% | 2025-Q1 stale |
| Centiva Capital, LP new | 29,487 | $120K | 0.1% | 2025-Q4 stale |
| HSBC HOLDINGS PLC trimmed | 25,065 | $100K | 0.1% | 2025-Q1 stale |
| Parcion Private Wealth LLC | 24,000 | $91K | 0.1% | 2025-Q2 stale |
| BOOTHBAY FUND MANAGEMENT, LLC new | 17,583 | $72K | 0.1% | 2025-Q4 stale |
| Quantbot Technologies LP added | 12,636 | $51K | 0.0% | 2025-Q1 stale |
| QRG CAPITAL MANAGEMENT, INC. added | 11,027 | $42K | 0.0% | 2025-Q2 stale |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 10,382 | $40K | 0.0% | 2025-Q2 stale |
| Quarry LP added | 5,602 | $23K | 0.0% | 2025-Q4 stale |
| SIMPLEX TRADING, LLC trimmed | 5,125 | $21K | 0.0% | 2025-Q4 stale |
| Tower Research Capital LLC (TRC) added | 2,948 | $12K | 0.0% | 2025-Q4 stale |
| BANK OF AMERICA CORP /DE/ trimmed | 2,616 | $11K | 0.0% | 2025-Q4 stale |
| Mirae Asset Global Investments Co., Ltd. trimmed | 2,112 | $8K | 0.0% | 2025-Q2 stale |
| Belvedere Trading LLC new | 1,983 | $8K | 0.0% | 2025-Q1 stale |
| Leonteq Securities AG | 1,119 | $5K | 0.0% | 2025-Q4 stale |
| Sarver Vrooman Wealth Advisors new | 585 | $2K | 0.0% | 2025-Q4 stale |
| SVB WEALTH LLC new | 450 | $2K | 0.0% | 2025-Q1 stale |
| IMA Advisory Services, Inc. new | 72 | $293 | 0.0% | 2025-Q4 stale |
| West Branch Capital LLC | 50 | $179 | 0.0% | 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.