GREE
Greenidge Generation Holdings Inc.Company with tickers: GREE, GREEL
CIK
1844971
CUSIP
39531G308
Shares Outstanding
15,286,349
13F Activity (30d)
16 filings
16 filers
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 23
Total Value: $1,478,001
Total Shares: 1,343,645
Institutional Ownership Trend
12 quarters
Holder Concentration
Across 23 13F filers · Δ vs Dec 31, 2025Top Holder
37.2%
+2.1 pts
Top 5
83.9%
−1.0 pts
Top 10
96.4%
−1.1 pts
HHI
2,056
Moderately concentrated+42
Quarterly Activity
vs Dec 31, 2025
New
6
Increased
5
Decreased
4
Sold Out
3
Unchanged
8
Holder count:
+3
Institutional value:
+27.0%
Shares held:
+70.9%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | +52,581 | 178,246 | |
| Mid Tower Research Capital LLC (TRC) | +2,206 | 7,347 | |
| Mid XTX Topco Ltd | +1,282 | 37,955 | |
| Mega CITIGROUP INC | +816 | 841 | |
| Mid SBI Securities Co., Ltd. | +30 | 2,619 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mid GSA CAPITAL PARTNERS LLP | −27,055 | 248,887 | |
| Small Dynamic Technology Lab Private Ltd | −3,224 | 10,392 | |
| Mega NORTHERN TRUST CORP | −66 | 29,806 | |
| Small EWA, LLC | −57 | 10,697 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mid Graham Capital Management, L.P. | 500,000 | $550,000 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 121,582 | $133,740 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 44,889 | $49,377 | |
| Large Centiva Capital, LP | 37,373 | $41,110 | |
| Mid Itau Unibanco Holding S.A. | 2,432 | $2,675 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega UBS Group AG | 150,378 | $222,557 | |
| Mid Virtu Financial LLC | 24,854 | $36,783 | |
| Large NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 1 | $1 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mid Graham Capital Management, L.P. | $550,000 | 37.21% | 500,000 | Shares | Sole | 2026-05-15 | ||||
| Mid GSA CAPITAL PARTNERS LLP | $273,775 | 18.52% | 248,887 | Shares | Sole | 2026-05-08 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $196,070 | 13.27% | 178,246 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $133,740 | 9.05% | 121,582 | Shares | Defined | 2026-05-15 | ||||
| Mega STATE STREET CORP | $86,955 | 5.88% | 79,050 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $49,377 | 3.34% | 44,889 | Shares | Defined | 2026-05-08 | ||||
| Mid XTX Topco Ltd | $41,750 | 2.82% | 37,955 | Shares | Defined | 2026-05-15 | ||||
| Large Centiva Capital, LP | $41,110 | 2.78% | 37,373 | Shares | Sole | 2026-05-14 | ||||
| Mega NORTHERN TRUST CORP Bank | $32,786 | 2.22% | 29,806 | Shares | Defined | 2026-05-14 | ||||
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $18,700 | 1.27% | 17,000 | Shares | Sole | 2026-05-15 | ||||
| Large Federation des caisses Desjardins du Quebec | $14,521 | 0.98% | 13,201 | Shares | Defined | 2026-05-14 | ||||
| Small EWA, LLC | $11,766 | 0.80% | 10,697 | Shares | Sole | 2026-04-23 | ||||
| Small Dynamic Technology Lab Private Ltd | $11,431 | 0.77% | 10,392 | Shares | Sole | 2026-05-15 | ||||
| Mid Tower Research Capital LLC (TRC) | $8,081 | 0.55% | 7,347 | Shares | Defined | 2026-05-15 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $2,880 | 0.19% | 2,619 | Shares | Defined | 2026-04-28 | ||||
| Mid Itau Unibanco Holding S.A. | $2,675 | 0.18% | 2,432 | Shares | Defined | 2026-05-15 | ||||
| Large US BANCORP \DE\ Bank | $1,113 | 0.08% | 1,012 | Shares | Defined | 2026-05-15 | ||||
| Mega CITIGROUP INC | $925 | 0.06% | 841 | Shares | Defined | 2026-05-11 | ||||
| Mega BNP PARIBAS ARBITRAGE, SA | $289 | 0.02% | 263 | Shares | Defined | 2026-05-12 | ||||
| Mid Ancora Advisors LLC | $48 | 0.00% | 44 | Shares | Sole | 2026-05-15 | ||||
| Small Caitong International Asset Management Co., Ltd | $5 | 0.00% | 5 | Shares | Sole | 2026-05-11 | ||||
| Large OSAIC HOLDINGS, INC. | $2 | 0.00% | 2 | Shares | Defined | 2026-05-15 | ||||
| Large FIFTH THIRD BANCORP Bank | $2 | 0.00% | 2 | Shares | Defined | 2026-05-01 | ||||
| No holders match your search. | ||||||||||