GSI Technology, Inc.
GSI Technology, Inc. (GSIT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · GSIT · as of Sep 30, 2025
Ownership Breakdown
57
Institutional Holders
▲ 7 vs Q2
$20.18M
Total Inst. Value
▲ $6.25M vs Q2
29.18M
Shares Outstanding
freeFloat 101.62%
5.48M
13F Shares Held
▲ 1.34M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
GSIT largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC semiconductors & related devices | 937.7K | 3.48% | 3.48% | $3.45B | Nov 7, 2025 | ▲ 75.9K |
SILVERBERG BERNSTEIN CAPITAL MANAGEMENT LLC semiconductors & related devices | 753.2K | 2.79% | 2.79% | $2.77B | Oct 7, 2025 | ▲ 64.7K |
TWO SIGMA INVESTMENTS, LP semiconductors & related devices | 391.3K | 1.45% | 1.45% | $1.44B | Nov 14, 2025 | ▲ 124.4K |
RENAISSANCE TECHNOLOGIES LLC semiconductors & related devices | 385.9K | 1.43% | 1.43% | $1.42B | Nov 13, 2025 | ▲ 265.8K |
MARSHALL WACE, LLP semiconductors & related devices | 341.9K | 1.27% | 1.27% | $1.26B | Nov 13, 2025 | ▲ 150.7K |
DIMENSIONAL FUND ADVISORS LP semiconductors & related devices | 300.9K | 1.12% | 1.12% | $1.11B | Nov 12, 2025 | ▼ 61.9K |
GEODE CAPITAL MANAGEMENT, LLC semiconductors & related devices | 242.1K | 89.79% | 89.79% | $891.24M | Nov 12, 2025 | ▲ 24.1K |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP semiconductors & related devices | 235.5K | 87.34% | 87.34% | $866.70M | Nov 13, 2025 | ▲ 76.3K |
ACADIAN ASSET MANAGEMENT LLC semiconductors & related devices | 202.5K | 75.10% | 75.10% | $744.00M | Nov 13, 2025 | ▲ 115.8K |
SQUAREPOINT OPS LLC semiconductors & related devices | 175.4K | 65.04% | 65.04% | $645.42M | Nov 14, 2025 | ▲ 154.1K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+1.62M shares9
New Positions
first time holders9
Decreased
−194.9K shares0
Sold Out
fully exitedNet shares change (top 50)
+1.43M
+1.62M / −194.9K
Net new holders
+24
9 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
GSIT insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
13
Buy transactions
23
Sell transactions
0.57
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Wu Ping Tak VP, U.S. Operations | May 26, 2026 | Sale | 30,000 | $11.01 | $330.4K | 148.4K | Form 4 ↗ |
Wu Bor-Tay VP, Taiwan Operations | May 22, 2026 | Sale | 20,000 | $10.93 | $218.7K | 912.5K | Form 4 ↗ |
Wu Bor-Tay VP, Taiwan Operations | May 22, 2026 | Sale | 20,000 | $10.93 | $218.7K | 912.5K | Form 4 ↗ |
Lasserre Didier VP, Sales | May 21, 2026 | Sale | 30,000 | $9.31 | $279.2K | 310.9K | Form 4 ↗ |
Schirle Douglas CFO | May 14, 2026 | Sale | 40,000 | $11.32 | $452.9K | 69.0K | Form 4 ↗ |
Wu Ping Tak VP, U.S. Operations | May 12, 2026 | Sale | 11,763 | $10.80 | $127.0K | 147.6K | Form 4 ↗ |
Shu Lee-Lean Pres., CEO and Chairman | May 13, 2026 | Sale | 10,313 | $12.51 | $129.0K | 530.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
GSI Technology, Inc. (GSIT) is primarily owned by institutional investors, who hold approximately 18.8% of total shares outstanding. Company insiders own approximately 0.00%, while retail and public investors account for the remaining 82.83%.
The largest institutional shareholder of GSI Technology, Inc. is VANGUARD GROUP INC, holding approximately 937,711 shares — equal to 3.48% of outstanding shares — as of September 30, 2025.
A total of 57 institutional investors currently hold GSIT stock, with a combined institutional value of approximately $20,178,842 as of the most recent 13F filing period.
Frequently asked questions
GSIT ownershipGSI Technology, Inc. (GSIT) is primarily owned by institutional investors, who hold approximately 18.8% of shares. The largest shareholder is VANGUARD GROUP INC with a 3.48% stake. Company insiders hold 0.00%. Data sourced from SEC Form 13F as of September 30, 2025.