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Institutional Ownership · SEC Form 13F

Who owns HYAC (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. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.

60
Institutional holders
27,988,124
Shares held (tracked funds)

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, 18 increased or opened the position and 34 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).

FundSharesReported value% of valueQuarter
AMERICAN CENTURY COMPANIES INC new2,707,667$31M10.7%2026-Q1
BERKLEY W R CORP added2,321,633$27M9.1%2026-Q1
Harraden Circle Investments, LLC added2,034,839$23M8.0%2026-Q1
Westchester Capital Management, LLC1,939,028$22M7.6%2026-Q1
WASATCH ADVISORS LP new1,674,418$19M6.6%2026-Q1
Polar Asset Management Partners Inc. added3,766,581$11M3.8%2026-Q1
MMCAP International Inc. SPC900,000$10M3.6%2026-Q1
AQR Arbitrage LLC added681,390$8M2.7%2026-Q1
D. E. Shaw & Co., Inc.603,700$7M2.4%2026-Q1
Alberta Investment Management Corp400,000$5M1.6%2026-Q1
HSBC HOLDINGS PLC330,900$4M1.3%2026-Q1
Hudson Bay Capital Management LP added1,236,234$4M1.2%2026-Q1
GLAZER CAPITAL, LLC trimmed300,200$3M1.2%2026-Q1
MOORE CAPITAL MANAGEMENT, LP added300,000$3M1.2%2026-Q1
ARISTEIA CAPITAL, L.L.C. added1,150,000$3M1.2%2026-Q1
First Trust Capital Management L.P. trimmed243,886$3M1.0%2026-Q1
SUSQUEHANNA INTERNATIONAL GROUP, LLP added207,422$2M0.8%2026-Q1
DLD Asset Management, LP204,028$2M0.8%2026-Q1
LMR Partners LLP added734,699$2M0.7%2026-Q1
Mint Tower Capital Management B.V.150,000$2M0.6%2026-Q1
Brevan Howard Capital Management LP new146,860$2M0.6%2026-Q1
MCGUIRE CAPITAL ADVISORS INC new135,000$2M0.5%2026-Q1
Linden Advisors LP450,001$1M0.5%2026-Q1
Calamos Advisors LLC added100,000$1M0.4%2026-Q1
Limestone Investment Advisors LP added392,164$1M0.4%2026-Q1
Fort Baker Capital Management LP trimmed316,127$933K0.3%2026-Q1
CastleKnight Management LP new73,751$851K0.3%2026-Q1
KORNITZER CAPITAL MANAGEMENT INC /KS new60,000$692K0.2%2026-Q1
K2 PRINCIPAL FUND, L.P. added231,072$682K0.2%2026-Q1
RIVERNORTH CAPITAL MANAGEMENT, LLC50,684$581K0.2%2026-Q1
DELTEC ASSET MANAGEMENT LLC50,000$573K0.2%2026-Q1
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND175,000$516K0.2%2026-Q1
GABELLI & Co INVESTMENT ADVISERS, INC.38,800$445K0.2%2026-Q1
TORONTO DOMINION BANK added150,000$442K0.2%2026-Q1
Yakira Capital Management, Inc. trimmed29,400$337K0.1%2026-Q1
CANTOR FITZGERALD, L. P. added74,619$220K0.1%2026-Q1
Shaolin Capital Management LLC trimmed74,018$218K0.1%2026-Q1
Clear Street Group Inc. trimmed40,912$121K0.0%2026-Q1
PRELUDE CAPITAL MANAGEMENT, LLC new25,000$74K0.0%2026-Q1
TPG GP A, LLC new25,000$74K0.0%2026-Q1
UBS Group AG added5,369$62K0.0%2026-Q1
GABELLI FUNDS LLC trimmed18,100$53K0.0%2026-Q1
READYSTATE ASSET MANAGEMENT LP17,667$52K0.0%2026-Q1
Virtu Financial LLC trimmed10,439$31K0.0%2026-Q1
WEXFORD CAPITAL LP trimmed148,3520.0%2026-Q1
WOLVERINE ASSET MANAGEMENT LLC added1,459,677$17M5.7%2025-Q4 stale
MIZUHO SECURITIES USA LLC added1,249,126$14M4.8%2025-Q4 stale
Decagon Asset Management LLP added19,068$8M2.6%2025-Q3 stale
Karpus Management, Inc. trimmed671,025$7M2.5%2025-Q2 stale
METEORA CAPITAL, LLC trimmed580,867$7M2.3%2025-Q4 stale
TWO SIGMA INVESTMENTS, LP500,000$6M1.9%2025-Q2 stale
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS450,000$5M1.7%2025-Q2 stale
HGC Investment Management Inc. trimmed415,000$5M1.6%2025-Q2 stale
Verition Fund Management LLC250,459$3M0.9%2025-Q1 stale
MIZUHO SECURITIES USA LLC added250,495$3M0.9%2025-Q1 stale
DEUTSCHE BANK AG\190,000$2M0.7%2025-Q4 stale
HEIGHTS CAPITAL MANAGEMENT, INC trimmed121,772$1M0.5%2025-Q4 stale
CLEAR STREET LLC added109,417$1M0.4%2025-Q2 stale
JPMORGAN CHASE & CO100,000$1M0.4%2025-Q4 stale
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) trimmed100,248$1M0.4%2025-Q4 stale
Radcliffe Capital Management, L.P.76,631$872K0.3%2025-Q4 stale
ANGELO GORDON & CO., L.P. added50,000$555K0.2%2025-Q2 stale
MILLENNIUM MANAGEMENT LLC trimmed40,000$444K0.2%2025-Q2 stale
Driehaus Capital Management LLC249,999$387K0.1%2025-Q4 stale
Periscope Capital Inc. trimmed249,249$386K0.1%2025-Q4 stale
Centiva Capital, LP trimmed32,131$364K0.1%2025-Q3 stale
Tabor Asset Management, LP new30,000$330K0.1%2025-Q1 stale
Wealthspring Capital LLC trimmed194,650$302K0.1%2025-Q4 stale
Dakota Wealth Management trimmed26,550$295K0.1%2025-Q2 stale
Evercore Wealth Management, LLC16,763$191K0.1%2025-Q4 stale
CONDOR CAPITAL MANAGEMENT14,945$170K0.1%2025-Q4 stale
CITADEL ADVISORS LLC trimmed14,968$170K0.1%2025-Q3 stale
Bulldog Investors, LLP trimmed14,625$166K0.1%2025-Q3 stale
GRITSTONE ASSET MANAGEMENT LLC103,843$161K0.1%2025-Q4 stale
Quarry LP trimmed101,451$157K0.1%2025-Q4 stale
Sandia Investment Management LP trimmed66,002$102K0.0%2025-Q4 stale
BARDIN HILL MANAGEMENT PARTNERS LP new6,074$67K0.0%2025-Q2 stale
PICTON MAHONEY ASSET MANAGEMENT trimmed100,000$45K0.0%2025-Q3 stale
Schechter Investment Advisors, LLC trimmed192,500$40K0.0%2025-Q1 stale
TENOR CAPITAL MANAGEMENT Co., L.P.25,049$39K0.0%2025-Q4 stale
Parallax Volatility Advisers, L.P. trimmed81,701$37K0.0%2025-Q3 stale
Ground Swell Capital, LLC new11,020$17K0.0%2025-Q4 stale
WHITEBOX ADVISORS LLC trimmed25,000$10K0.0%2025-Q3 stale
CAAS CAPITAL MANAGEMENT LP19,405$4K0.0%2025-Q1 stale
HIGHBRIDGE CAPITAL MANAGEMENT LLC new100$1K0.0%2025-Q4 stale
Tower Research Capital LLC (TRC) trimmed100$1K0.0%2025-Q4 stale
CONCOURSE FINANCIAL GROUP SECURITIES, INC.00.0%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.

HoldersTotal shares

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.

Learn how to read institutional ownership