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.
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).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Harraden Circle Investments, LLC added | 4,862,751 | $1.5B | 70.1% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 1,500,000 | $450M | 21.6% | 2026-Q1 |
| AQR Arbitrage LLC trimmed | 1,692,969 | $17M | 0.8% | 2026-Q1 |
| Westchester Capital Management, LLC added | 1,330,000 | $13M | 0.6% | 2026-Q1 |
| BERKLEY W R CORP | 1,289,470 | $13M | 0.6% | 2026-Q1 |
| Karpus Management, Inc. added | 963,650 | $10M | 0.5% | 2026-Q1 |
| Yakira Capital Management, Inc. trimmed | 938,377 | $9M | 0.4% | 2026-Q1 |
| WHITEBOX ADVISORS LLC | 800,000 | $8M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 768,970 | $8M | 0.4% | 2026-Q1 |
| D. E. Shaw & Co., Inc. | 759,000 | $8M | 0.4% | 2026-Q1 |
| Magnetar Financial LLC | 695,261 | $7M | 0.3% | 2026-Q1 |
| Logan Stone Capital, LLC | 512,612 | $5M | 0.2% | 2026-Q1 |
| Mercuria Capital Strategies, LLC added | 500,000 | $5M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS | 483,231 | $5M | 0.2% | 2026-Q1 |
| PICTON MAHONEY ASSET MANAGEMENT | 425,000 | $4M | 0.2% | 2026-Q1 |
| SONA ASSET MANAGEMENT (US) LLC new | 416,416 | $4M | 0.2% | 2026-Q1 |
| Mint Tower Capital Management B.V. | 400,000 | $4M | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP | 398,750 | $4M | 0.2% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC trimmed | 385,643 | $4M | 0.2% | 2026-Q1 |
| Periscope Capital Inc. added | 375,000 | $4M | 0.2% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. added | 361,812 | $4M | 0.2% | 2026-Q1 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 300,000 | $3M | 0.1% | 2026-Q1 |
| HGC Investment Management Inc. | 250,000 | $3M | 0.1% | 2026-Q1 |
| BlueCrest Capital Management Ltd new | 250,000 | $2M | 0.1% | 2026-Q1 |
| Linden Advisors LP | 250,000 | $2M | 0.1% | 2026-Q1 |
| Crossingbridge Advisors, LLC trimmed | 250,000 | $2M | 0.1% | 2026-Q1 |
| METEORA CAPITAL, LLC trimmed | 248,944 | $2M | 0.1% | 2026-Q1 |
| TORONTO DOMINION BANK trimmed | 219,359 | $2M | 0.1% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 187,222 | $2M | 0.1% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 193,203 | $2M | 0.1% | 2026-Q1 |
| Centiva Capital, LP new | 175,662 | $2M | 0.1% | 2026-Q1 |
| Bulldog Investors, LLP trimmed | 154,893 | $2M | 0.1% | 2026-Q1 |
| DLD Asset Management, LP | 133,333 | $1M | 0.1% | 2026-Q1 |
| Verition Fund Management LLC trimmed | 87,500 | $872K | 0.0% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 75,000 | $748K | 0.0% | 2026-Q1 |
| HRT FINANCIAL LP added | 50,798 | $520K | 0.0% | 2026-Q1 |
| Lynrock Lake LP | 50,000 | $487K | 0.0% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 44,981 | $448K | 0.0% | 2026-Q1 |
| ABC ARBITRAGE SA added | 40,000 | $399K | 0.0% | 2026-Q1 |
| GLAZER CAPITAL, LLC | 1,496,746 | $374K | 0.0% | 2026-Q1 |
| Virtu Financial LLC trimmed | 36,794 | $367K | 0.0% | 2026-Q1 |
| Lineage Point Capital LP | 35,000 | $349K | 0.0% | 2026-Q1 |
| Dakota Wealth Management new | 27,700 | $276K | 0.0% | 2026-Q1 |
| Polar Asset Management Partners Inc. | 850,000 | $255K | 0.0% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. | 850,000 | $255K | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO new | 747,951 | $209K | 0.0% | 2026-Q1 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC added | 747,951 | $209K | 0.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC | 19,549 | $195K | 0.0% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 599,512 | $180K | 0.0% | 2026-Q1 |
| MIZUHO SECURITIES USA LLC trimmed | 15,633 | $156K | 0.0% | 2026-Q1 |
| Radcliffe Capital Management, L.P. | 550,000 | $151K | 0.0% | 2026-Q1 |
| Wellspring Financial Advisors, LLC new | 15,000 | $150K | 0.0% | 2026-Q1 |
| CITADEL ADVISORS LLC new | 10,992 | $110K | 0.0% | 2026-Q1 |
| Alpine Global Management, LLC | 400,000 | $100K | 0.0% | 2026-Q1 |
| GABELLI & Co INVESTMENT ADVISERS, INC. | 299,871 | $90K | 0.0% | 2026-Q1 |
| GABELLI FUNDS LLC | 255,300 | $77K | 0.0% | 2026-Q1 |
| HEIGHTS CAPITAL MANAGEMENT, INC trimmed | 140,140 | $42K | 0.0% | 2026-Q1 |
| Shaolin Capital Management LLC new | 133,970 | $40K | 0.0% | 2026-Q1 |
| Kepos Capital LP new | 95,600 | $26K | 0.0% | 2026-Q1 |
| Stoic Point Capital Management LLC | 39,583 | $10K | 0.0% | 2026-Q1 |
| UBS Group AG added | 250 | $3K | 0.0% | 2026-Q1 |
| MORGAN STANLEY new | 100 | $997 | 0.0% | 2026-Q1 |
| MATHER GROUP, LLC. new | 5 | $51 | 0.0% | 2026-Q1 |
| StoneX Group Inc. new | 161,800 | $2M | 0.1% | 2025-Q4 stale |
| Wealthspring Capital LLC new | 100,000 | $1M | 0.0% | 2025-Q4 stale |
| Quarry LP new | 75,000 | $768K | 0.0% | 2025-Q4 stale |
| PharVision Advisers, LLC new | 16,607 | $164K | 0.0% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP new | 500,000 | $155K | 0.0% | 2025-Q4 stale |
| K2 PRINCIPAL FUND, L.P. new | 100,000 | $31K | 0.0% | 2025-Q4 stale |
| GRITSTONE ASSET MANAGEMENT LLC new | 50,000 | $16K | 0.0% | 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.
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.