Who owns GSIT (GSIT)
Which tracked institutional funds hold GSIT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See GSIT 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
8 tracked funds added or opened GSIT while 14 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
GSIT’s largest tracked holder by dollar value, VANGUARD GROUP 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 GSIT more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in GSIT 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 70 tracked filers holding GSIT, 41 increased or opened the position and 31 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 GSIT 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 5
- VANGUARD CAPITAL MANAGEMENT LLC$7M
- PRICE T ROWE ASSOCIATES INC /MD/$4M
- WELLS FARGO & COMPANY/MN$2M
- Potomac Capital Management, Inc.$2M
- VANGUARD FIDUCIARY TRUST CO$953K
Full exits 3
- VANGUARD GROUP INC$9M
- Concentric Capital Strategies, LP$2M
- DISCOVERY CAPITAL MANAGEMENT, LLC / CT$1M
Largest adds
- MILLENNIUM MANAGEMENT LLC$2M
- BANK OF AMERICA CORP /DE/$407K
- JANE STREET GROUP, LLC$393K
Largest trims
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$2M
- MARSHALL WACE, LLP$1M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$939K
- Silverberg Bernstein Capital Management LLC$771K
- SIMPLEX TRADING, LLC$457K
- UBS Group AG$420K
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 |
|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,278,432 | $7M | 10.1% | 2026-Q1 |
| Silverberg Bernstein Capital Management LLC added | 785,706 | $4M | 6.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ new | 742,670 | $4M | 5.9% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 639,027 | $3M | 5.1% | 2026-Q1 |
| BlackRock, Inc. added | 543,998 | $3M | 4.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 530,204 | $3M | 4.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 464,030 | $2M | 3.7% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 440,000 | $2M | 3.5% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 429,819 | $2M | 3.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 350,694 | $2M | 2.8% | 2026-Q1 |
| Potomac Capital Management, Inc. new | 348,400 | $2M | 2.8% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 343,522 | $2M | 2.7% | 2026-Q1 |
| UBS Group AG trimmed | 305,749 | $2M | 2.4% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 191,392 | $984K | 1.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 185,342 | $953K | 1.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 158,039 | $812K | 1.3% | 2026-Q1 |
| Tidal Investments LLC added | 152,663 | $785K | 1.2% | 2026-Q1 |
| STATE STREET CORP added | 138,842 | $714K | 1.1% | 2026-Q1 |
| Squarepoint Ops LLC added | 135,303 | $695K | 1.1% | 2026-Q1 |
| 683 Capital Management, LLC | 118,835 | $611K | 0.9% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 116,353 | $598K | 0.9% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 101,291 | $521K | 0.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 97,677 | $502K | 0.8% | 2026-Q1 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 92,534 | $476K | 0.7% | 2026-Q1 |
| MORGAN STANLEY trimmed | 85,882 | $441K | 0.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 78,701 | $405K | 0.6% | 2026-Q1 |
| SIH Partners, LLLP new | 77,539 | $399K | 0.6% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 71,229 | $366K | 0.6% | 2026-Q1 |
| IMC-Chicago, LLC trimmed | 63,638 | $327K | 0.5% | 2026-Q1 |
| NORTHERN TRUST CORP | 61,048 | $314K | 0.5% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 54,500 | $280K | 0.4% | 2026-Q1 |
| Hudson Bay Capital Management LP new | 54,458 | $280K | 0.4% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP | 50,847 | $261K | 0.4% | 2026-Q1 |
| Brevan Howard Capital Management LP new | 49,011 | $252K | 0.4% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 41,438 | $213K | 0.3% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 40,466 | $208K | 0.3% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 33,300 | $171K | 0.3% | 2026-Q1 |
| JB CAPITAL PARTNERS LP | 33,000 | $170K | 0.3% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC new | 32,627 | $168K | 0.3% | 2026-Q1 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 30,454 | $157K | 0.2% | 2026-Q1 |
| TWO SIGMA SECURITIES, LLC added | 28,680 | $147K | 0.2% | 2026-Q1 |
| LPL Financial LLC new | 27,946 | $144K | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 25,202 | $130K | 0.2% | 2026-Q1 |
| Scientech Research LLC new | 24,522 | $126K | 0.2% | 2026-Q1 |
| Virtu Financial LLC added | 18,930 | $97K | 0.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 18,005 | $93K | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 17,409 | $89K | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp trimmed | 17,000 | $87K | 0.1% | 2026-Q1 |
| SIMPLEX TRADING, LLC trimmed | 16,567 | $85K | 0.1% | 2026-Q1 |
| Vanguard Personalized Indexing Management, LLC trimmed | 15,726 | $81K | 0.1% | 2026-Q1 |
| Centiva Capital, LP trimmed | 14,981 | $77K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 14,042 | $72K | 0.1% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC | 12,600 | $65K | 0.1% | 2026-Q1 |
| XTX Topco Ltd trimmed | 11,675 | $60K | 0.1% | 2026-Q1 |
| Allworth Financial LP added | 11,598 | $60K | 0.1% | 2026-Q1 |
| Diametric Capital, LP new | 10,996 | $57K | 0.1% | 2026-Q1 |
| CITIGROUP INC trimmed | 4,468 | $23K | 0.0% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP added | 4,103 | $22K | 0.0% | 2026-Q1 |
| NewEdge Advisors, LLC trimmed | 13,740 | $14K | 0.0% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 2,106 | $11K | 0.0% | 2026-Q1 |
| Advisory Services Network, LLC added | 2,000 | $10K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) trimmed | 1,270 | $7K | 0.0% | 2026-Q1 |
| EverSource Wealth Advisors, LLC new | 228 | $4K | 0.0% | 2026-Q1 |
| CoreCap Advisors, LLC | 500 | $3K | 0.0% | 2026-Q1 |
| Steward Partners Investment Advisory, LLC | 500 | $3K | 0.0% | 2026-Q1 |
| MAI Capital Management new | 300 | $2K | 0.0% | 2026-Q1 |
| FMR LLC trimmed | 123 | $634 | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. trimmed | 37 | $190 | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO | 29 | $139 | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 1,453,236 | $9M | 13.9% | 2025-Q4 stale |
| Concentric Capital Strategies, LP new | 340,664 | $2M | 3.3% | 2025-Q4 stale |
| DISCOVERY CAPITAL MANAGEMENT, LLC / CT new | 183,600 | $1M | 1.8% | 2025-Q4 stale |
| GROUP ONE TRADING LLC added | 60,255 | $374K | 0.6% | 2025-Q4 stale |
| Graham Capital Management, L.P. new | 55,886 | $347K | 0.5% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 46,500 | $171K | 0.3% | 2025-Q3 stale |
| Jump Financial, LLC trimmed | 22,950 | $143K | 0.2% | 2025-Q4 stale |
| Lighthouse Investment Partners, LLC new | 17,280 | $107K | 0.2% | 2025-Q4 stale |
| Belvedere Trading LLC added | 48,674 | $99K | 0.2% | 2025-Q1 stale |
| Quadrature Capital Ltd new | 26,751 | $90K | 0.1% | 2025-Q2 stale |
| ALGERT GLOBAL LLC added | 23,970 | $88K | 0.1% | 2025-Q3 stale |
| WOLVERINE TRADING, LLC added | 21,984 | $82K | 0.1% | 2025-Q3 stale |
| Dynamic Technology Lab Private Ltd new | 18,678 | $69K | 0.1% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC trimmed | 17,866 | $66K | 0.1% | 2025-Q3 stale |
| U.S. Capital Wealth Advisors, LLC | 16,333 | $60K | 0.1% | 2025-Q3 stale |
| PRELUDE CAPITAL MANAGEMENT, LLC added | 14,200 | $52K | 0.1% | 2025-Q3 stale |
| Legato Capital Management LLC | 11,365 | $42K | 0.1% | 2025-Q3 stale |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 6,340 | $39K | 0.1% | 2025-Q4 stale |
| R Squared Ltd added | 10,421 | $38K | 0.1% | 2025-Q3 stale |
| VIAWEALTH, LLC trimmed | 17,850 | $36K | 0.1% | 2025-Q1 stale |
| CIBC Private Wealth Group LLC | 5,000 | $31K | 0.0% | 2025-Q4 stale |
| Ethos Financial Group, LLC | 10,086 | $31K | 0.0% | 2025-Q2 stale |
| FNY Investment Advisers, LLC new | 4,000 | $24K | 0.0% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 4,847 | $16K | 0.0% | 2025-Q2 stale |
| Federation des caisses Desjardins du Quebec | 5,000 | $10K | 0.0% | 2025-Q1 stale |
| Beacon Capital Management, LLC | 2,000 | $4K | 0.0% | 2025-Q1 stale |
| Rise Advisors, LLC | 738 | $3K | 0.0% | 2025-Q3 stale |
| MILLER WEALTH ADVISORS, LLC new | 300 | $2K | 0.0% | 2025-Q4 stale |
| Farther Finance Advisors, LLC | 200 | $1K | 0.0% | 2025-Q4 stale |
| N.E.W. Advisory Services LLC | 344 | $1K | 0.0% | 2025-Q2 stale |
| BNP PARIBAS FINANCIAL MARKETS | 204 | $685 | 0.0% | 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.
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.