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Institutional Ownership · SEC Form 13F

Who owns GIW (GIW)


Which tracked institutional funds hold GIW, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See GIW 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.

101
Institutional holders
48,547,497
Shares held (tracked funds)

How the tape is positioned

9 tracked funds added or opened GIW while 13 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

GIW’s largest tracked holder by dollar value, Harraden Circle Investments, LLC, sizes it at 11.4% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 11.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in GIW 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 63 tracked filers holding GIW, 29 increased or opened the position and 19 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 GIW 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 4

  • SONA ASSET MANAGEMENT (US) LLC$4M
  • BlueCrest Capital Management Ltd$2M
  • Centiva Capital, LP$2M
  • Kepos Capital LP$1M

Full exits 4

  • StoneX Group Inc.$2M
  • Wealthspring Capital LLC$1M
  • Quarry LP$815K
  • GRITSTONE ASSET MANAGEMENT LLC$510K

Largest adds

  • Harraden Circle Investments, LLC$152M
  • Karpus Management, Inc.$9M
  • Parallax Volatility Advisers, L.P.$4M
  • Westchester Capital Management, LLC$3M
  • MILLENNIUM MANAGEMENT LLC$926K

Largest trims

  • METEORA CAPITAL, LLC$21M
  • TENOR CAPITAL MANAGEMENT Co., L.P.$15M
  • MIZUHO SECURITIES USA LLC$5M
  • Alpine Global Management, LLC$4M
  • TORONTO DOMINION BANK$4M
  • Clear Street Group Inc.$992K

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
Harraden Circle Investments, LLC added4,862,751$1.5B70.1%2026-Q1
TENOR CAPITAL MANAGEMENT Co., L.P.1,500,000$450M21.6%2026-Q1
AQR Arbitrage LLC trimmed1,692,969$17M0.8%2026-Q1
Westchester Capital Management, LLC added1,330,000$13M0.6%2026-Q1
BERKLEY W R CORP1,289,470$13M0.6%2026-Q1
Karpus Management, Inc. added963,650$10M0.5%2026-Q1
Yakira Capital Management, Inc. trimmed938,377$9M0.4%2026-Q1
WHITEBOX ADVISORS LLC800,000$8M0.4%2026-Q1
MILLENNIUM MANAGEMENT LLC added768,970$8M0.4%2026-Q1
D. E. Shaw & Co., Inc.759,000$8M0.4%2026-Q1
Magnetar Financial LLC695,261$7M0.3%2026-Q1
Logan Stone Capital, LLC512,612$5M0.2%2026-Q1
Mercuria Capital Strategies, LLC added500,000$5M0.2%2026-Q1
BNP PARIBAS FINANCIAL MARKETS483,231$5M0.2%2026-Q1
PICTON MAHONEY ASSET MANAGEMENT425,000$4M0.2%2026-Q1
SONA ASSET MANAGEMENT (US) LLC new416,416$4M0.2%2026-Q1
Mint Tower Capital Management B.V.400,000$4M0.2%2026-Q1
TWO SIGMA INVESTMENTS, LP398,750$4M0.2%2026-Q1
WOLVERINE ASSET MANAGEMENT LLC trimmed385,643$4M0.2%2026-Q1
Periscope Capital Inc. added375,000$4M0.2%2026-Q1
Parallax Volatility Advisers, L.P. added361,812$4M0.2%2026-Q1
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS300,000$3M0.1%2026-Q1
HGC Investment Management Inc.250,000$3M0.1%2026-Q1
BlueCrest Capital Management Ltd new250,000$2M0.1%2026-Q1
Linden Advisors LP250,000$2M0.1%2026-Q1
Crossingbridge Advisors, LLC trimmed250,000$2M0.1%2026-Q1
METEORA CAPITAL, LLC trimmed248,944$2M0.1%2026-Q1
TORONTO DOMINION BANK trimmed219,359$2M0.1%2026-Q1
Clear Street Group Inc. trimmed187,222$2M0.1%2026-Q1
Schonfeld Strategic Advisors LLC trimmed193,203$2M0.1%2026-Q1
Centiva Capital, LP new175,662$2M0.1%2026-Q1
Bulldog Investors, LLP trimmed154,893$2M0.1%2026-Q1
DLD Asset Management, LP133,333$1M0.1%2026-Q1
Verition Fund Management LLC trimmed87,500$872K0.0%2026-Q1
BOOTHBAY FUND MANAGEMENT, LLC trimmed75,000$748K0.0%2026-Q1
HRT FINANCIAL LP added50,798$520K0.0%2026-Q1
Lynrock Lake LP50,000$487K0.0%2026-Q1
SUSQUEHANNA INTERNATIONAL GROUP, LLP44,981$448K0.0%2026-Q1
ABC ARBITRAGE SA added40,000$399K0.0%2026-Q1
GLAZER CAPITAL, LLC1,496,746$374K0.0%2026-Q1
Virtu Financial LLC trimmed36,794$367K0.0%2026-Q1
Lineage Point Capital LP35,000$349K0.0%2026-Q1
Dakota Wealth Management new27,700$276K0.0%2026-Q1
Polar Asset Management Partners Inc.850,000$255K0.0%2026-Q1
ARISTEIA CAPITAL, L.L.C.850,000$255K0.0%2026-Q1
JPMORGAN CHASE & CO new747,951$209K0.0%2026-Q1
HIGHBRIDGE CAPITAL MANAGEMENT LLC added747,951$209K0.0%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC19,549$195K0.0%2026-Q1
RIVERNORTH CAPITAL MANAGEMENT, LLC599,512$180K0.0%2026-Q1
MIZUHO SECURITIES USA LLC trimmed15,633$156K0.0%2026-Q1
Radcliffe Capital Management, L.P.550,000$151K0.0%2026-Q1
Wellspring Financial Advisors, LLC new15,000$150K0.0%2026-Q1
CITADEL ADVISORS LLC new10,992$110K0.0%2026-Q1
Alpine Global Management, LLC400,000$100K0.0%2026-Q1
GABELLI & Co INVESTMENT ADVISERS, INC.299,871$90K0.0%2026-Q1
GABELLI FUNDS LLC255,300$77K0.0%2026-Q1
HEIGHTS CAPITAL MANAGEMENT, INC trimmed140,140$42K0.0%2026-Q1
Shaolin Capital Management LLC new133,970$40K0.0%2026-Q1
Kepos Capital LP new95,600$26K0.0%2026-Q1
Stoic Point Capital Management LLC39,583$10K0.0%2026-Q1
UBS Group AG added250$3K0.0%2026-Q1
MORGAN STANLEY new100$9970.0%2026-Q1
MATHER GROUP, LLC. new5$510.0%2026-Q1
StoneX Group Inc. new161,800$2M0.1%2025-Q4 stale
Wealthspring Capital LLC new100,000$1M0.0%2025-Q4 stale
Quarry LP new75,000$768K0.0%2025-Q4 stale
PharVision Advisers, LLC new16,607$164K0.0%2025-Q4 stale
ExodusPoint Capital Management, LP new500,000$155K0.0%2025-Q4 stale
K2 PRINCIPAL FUND, L.P. new100,000$31K0.0%2025-Q4 stale
GRITSTONE ASSET MANAGEMENT LLC new50,000$16K0.0%2025-Q4 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