Who owns HYAC
Which tracked institutional funds hold HYAC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See HYAC company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-15). 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
15 tracked funds added or opened HYAC while 22 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
HYAC’s largest tracked holder by dollar value, AMERICAN CENTURY COMPANIES INC, 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 gap the other way — the median holder sizes HYAC more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in HYAC 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 45 tracked filers holding HYAC, 11 increased or opened the position and 30 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 HYAC 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 6
- AMERICAN CENTURY COMPANIES INC$31M
- WASATCH ADVISORS LP$19M
- Brevan Howard Capital Management LP$2M
- MCGUIRE CAPITAL ADVISORS INC$2M
- CastleKnight Management LP$1M
- KORNITZER CAPITAL MANAGEMENT INC /KS$692K
Full exits 12
- Wealthspring Capital LLC$19M
- WOLVERINE ASSET MANAGEMENT LLC$17M
- MIZUHO SECURITIES USA LLC$14M
- METEORA CAPITAL, LLC$7M
- Sandia Investment Management LP$4M
- Quarry LP$4M
Largest adds
- Harraden Circle Investments, LLC$18M
- Polar Asset Management Partners Inc.$15M
- BERKLEY W R CORP$4M
- Hudson Bay Capital Management LP$3M
- LMR Partners LLP$1M
- Limestone Investment Advisors LP$1M
Largest trims
- Fort Baker Capital Management LP$23M
- First Trust Capital Management L.P.$14M
- WEXFORD CAPITAL LP$6M
- GLAZER CAPITAL, LLC$5M
- K2 PRINCIPAL FUND, L.P.$2M
- TORONTO DOMINION BANK$2M
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 |
|---|---|---|---|---|
| AMERICAN CENTURY COMPANIES INC new | 2,707,667 | $31M | 9.6% | 2026-Q1 |
| BERKLEY W R CORP added | 2,321,633 | $27M | 8.2% | 2026-Q1 |
| Harraden Circle Investments, LLC trimmed | 2,034,839 | $23M | 7.2% | 2026-Q1 |
| Westchester Capital Management, LLC | 1,939,028 | $22M | 6.8% | 2026-Q1 |
| WASATCH ADVISORS LP new | 1,674,418 | $19M | 5.9% | 2026-Q1 |
| Polar Asset Management Partners Inc. added | 3,766,581 | $11M | 3.4% | 2026-Q1 |
| Linden Advisors LP | 900,000 | $10M | 3.2% | 2026-Q1 |
| MMCAP International Inc. SPC | 900,000 | $10M | 3.2% | 2026-Q1 |
| AQR Arbitrage LLC trimmed | 681,390 | $8M | 2.4% | 2026-Q1 |
| D. E. Shaw & Co., Inc. | 603,700 | $7M | 2.1% | 2026-Q1 |
| Alberta Investment Management Corp | 400,000 | $5M | 1.4% | 2026-Q1 |
| HSBC HOLDINGS PLC | 330,900 | $4M | 1.2% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 1,236,234 | $4M | 1.1% | 2026-Q1 |
| GLAZER CAPITAL, LLC trimmed | 300,200 | $3M | 1.1% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP | 300,000 | $3M | 1.1% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. added | 1,150,000 | $3M | 1.0% | 2026-Q1 |
| Fort Baker Capital Management LP trimmed | 250,000 | $3M | 0.9% | 2026-Q1 |
| First Trust Capital Management L.P. trimmed | 243,886 | $3M | 0.9% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 207,422 | $2M | 0.7% | 2026-Q1 |
| DLD Asset Management, LP | 204,028 | $2M | 0.7% | 2026-Q1 |
| Shaolin Capital Management LLC trimmed | 200,000 | $2M | 0.7% | 2026-Q1 |
| LMR Partners LLP added | 734,699 | $2M | 0.7% | 2026-Q1 |
| Mint Tower Capital Management B.V. | 150,000 | $2M | 0.5% | 2026-Q1 |
| Brevan Howard Capital Management LP new | 146,860 | $2M | 0.5% | 2026-Q1 |
| MCGUIRE CAPITAL ADVISORS INC new | 135,000 | $2M | 0.5% | 2026-Q1 |
| Calamos Advisors LLC | 100,000 | $1M | 0.4% | 2026-Q1 |
| Limestone Investment Advisors LP added | 392,164 | $1M | 0.4% | 2026-Q1 |
| CastleKnight Management LP new | 73,751 | $851K | 0.3% | 2026-Q1 |
| KORNITZER CAPITAL MANAGEMENT INC /KS new | 60,000 | $692K | 0.2% | 2026-Q1 |
| K2 PRINCIPAL FUND, L.P. added | 231,072 | $682K | 0.2% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 50,684 | $581K | 0.2% | 2026-Q1 |
| DELTEC ASSET MANAGEMENT LLC | 50,000 | $573K | 0.2% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 175,000 | $516K | 0.2% | 2026-Q1 |
| GABELLI & Co INVESTMENT ADVISERS, INC. | 38,800 | $445K | 0.1% | 2026-Q1 |
| TORONTO DOMINION BANK added | 150,000 | $442K | 0.1% | 2026-Q1 |
| Yakira Capital Management, Inc. trimmed | 29,400 | $337K | 0.1% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. added | 74,619 | $220K | 0.1% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 40,912 | $121K | 0.0% | 2026-Q1 |
| PRELUDE CAPITAL MANAGEMENT, LLC new | 25,000 | $74K | 0.0% | 2026-Q1 |
| TPG GP A, LLC new | 25,000 | $74K | 0.0% | 2026-Q1 |
| UBS Group AG added | 5,369 | $62K | 0.0% | 2026-Q1 |
| GABELLI FUNDS LLC trimmed | 18,100 | $53K | 0.0% | 2026-Q1 |
| READYSTATE ASSET MANAGEMENT LP | 17,667 | $52K | 0.0% | 2026-Q1 |
| Virtu Financial LLC trimmed | 10,439 | $31K | 0.0% | 2026-Q1 |
| WEXFORD CAPITAL LP trimmed | 148,352 | — | 0.0% | 2026-Q1 |
| Wealthspring Capital LLC trimmed | 1,657,453 | $19M | 5.8% | 2025-Q4 stale (1 quarter behind) |
| WOLVERINE ASSET MANAGEMENT LLC added | 1,459,677 | $17M | 5.1% | 2025-Q4 stale (1 quarter behind) |
| MIZUHO SECURITIES USA LLC added | 1,249,126 | $14M | 4.3% | 2025-Q4 stale (1 quarter behind) |
| METEORA CAPITAL, LLC added | 580,867 | $7M | 2.0% | 2025-Q4 stale (1 quarter behind) |
| Sandia Investment Management LP added | 349,987 | $4M | 1.2% | 2025-Q4 stale (1 quarter behind) |
| Quarry LP trimmed | 298,232 | $3M | 1.0% | 2025-Q4 stale (1 quarter behind) |
| Periscope Capital Inc. trimmed | 206,700 | $2M | 0.7% | 2025-Q4 stale (1 quarter behind) |
| DEUTSCHE BANK AG\ | 190,000 | $2M | 0.7% | 2025-Q4 stale (1 quarter behind) |
| HEIGHTS CAPITAL MANAGEMENT, INC trimmed | 121,772 | $1M | 0.4% | 2025-Q4 stale (1 quarter behind) |
| JPMORGAN CHASE & CO | 100,000 | $1M | 0.3% | 2025-Q4 stale (1 quarter behind) |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new | 100,248 | $1M | 0.3% | 2025-Q4 stale (1 quarter behind) |
| Radcliffe Capital Management, L.P. | 76,631 | $872K | 0.3% | 2025-Q4 stale (1 quarter behind) |
| Driehaus Capital Management LLC | 249,999 | $387K | 0.1% | 2025-Q4 stale (1 quarter behind) |
| Evercore Wealth Management, LLC | 16,763 | $191K | 0.1% | 2025-Q4 stale (1 quarter behind) |
| CONDOR CAPITAL MANAGEMENT | 14,945 | $170K | 0.1% | 2025-Q4 stale (1 quarter behind) |
| GRITSTONE ASSET MANAGEMENT LLC | 103,843 | $161K | 0.0% | 2025-Q4 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 25,049 | $39K | 0.0% | 2025-Q4 stale (1 quarter behind) |
| Ground Swell Capital, LLC new | 11,020 | $17K | 0.0% | 2025-Q4 stale (1 quarter behind) |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC new | 100 | $1K | 0.0% | 2025-Q4 stale (1 quarter behind) |
| Tower Research Capital LLC (TRC) trimmed | 100 | $1K | 0.0% | 2025-Q4 stale (1 quarter behind) |
| Decagon Asset Management LLP added | 19,068 | $8M | 2.3% | 2025-Q3 stale (2 quarters behind) |
| Centiva Capital, LP trimmed | 32,131 | $364K | 0.1% | 2025-Q3 stale (2 quarters behind) |
| CITADEL ADVISORS LLC trimmed | 14,968 | $170K | 0.1% | 2025-Q3 stale (2 quarters behind) |
| Bulldog Investors, LLP trimmed | 14,625 | $166K | 0.1% | 2025-Q3 stale (2 quarters behind) |
| PICTON MAHONEY ASSET MANAGEMENT trimmed | 100,000 | $45K | 0.0% | 2025-Q3 stale (2 quarters behind) |
| Parallax Volatility Advisers, L.P. trimmed | 81,701 | $37K | 0.0% | 2025-Q3 stale (2 quarters behind) |
| WHITEBOX ADVISORS LLC trimmed | 25,000 | $10K | 0.0% | 2025-Q3 stale (2 quarters behind) |
| Karpus Management, Inc. trimmed | 671,025 | $7M | 2.3% | 2025-Q2 stale (3 quarters behind) |
| TWO SIGMA INVESTMENTS, LP | 500,000 | $6M | 1.7% | 2025-Q2 stale (3 quarters behind) |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 450,000 | $5M | 1.5% | 2025-Q2 stale (3 quarters behind) |
| HGC Investment Management Inc. trimmed | 415,000 | $5M | 1.4% | 2025-Q2 stale (3 quarters behind) |
| CLEAR STREET LLC added | 109,417 | $1M | 0.4% | 2025-Q2 stale (3 quarters behind) |
| ANGELO GORDON & CO., L.P. added | 50,000 | $555K | 0.2% | 2025-Q2 stale (3 quarters behind) |
| MILLENNIUM MANAGEMENT LLC trimmed | 40,000 | $444K | 0.1% | 2025-Q2 stale (3 quarters behind) |
| Dakota Wealth Management trimmed | 26,550 | $295K | 0.1% | 2025-Q2 stale (3 quarters behind) |
| BARDIN HILL MANAGEMENT PARTNERS LP new | 6,074 | $67K | 0.0% | 2025-Q2 stale (3 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (3 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.