New Positions
20 managers initiated
Top five by reported value
GIGGW GIGGW
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
20 new4 added18 reduced8 exited
Total Institutional Holders
42
as of 2025-12-31
Top Holder
TENOR CAPITAL MANAGEMENT Co., L.P.
$20.0M
Largest QoQ Increase
HIGHBRIDGE CAPITAL MANAGEMENT LLC
+1,878,437 sh
Largest QoQ Decrease
Karpus Management, Inc.
-1,703,124 sh
New Positions(20)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 1,878,437 | +1,878,437 | $19.8M | +$19.8M | — |
| CITADEL ADVISORS LLC | 754,300 | +754,300 | $8.0M | +$8.0M | — |
| Shay Capital LLC | 495,328 | +495,328 | $5.2M | +$5.2M | — |
| MILLENNIUM MANAGEMENT LLC | 395,698 | +395,698 | $4.2M | +$4.2M | — |
| METEORA CAPITAL, LLC | 284,966 | +284,966 | $3.0M | +$3.0M | — |
| Linden Advisors LP | 250,000 | +250,000 | $2.6M | +$2.6M | — |
| Alpine Global Management, LLC | 210,000 | +210,000 | $2.2M | +$2.2M | — |
| Lighthouse Investment Partners, LLC | 200,000 | +200,000 | $2.1M | +$2.1M | — |
| Clear Street Group Inc. | 110,243 | +110,243 | $1.2M | +$1.2M | — |
| LMR Partners LLP | 100,000 | +100,000 | $1.1M | +$1.1M | — |
| Ionic Capital Management LLC | 70,000 | +70,000 | $737.8K | +$737.8K | — |
| GEODE CAPITAL MANAGEMENT, LLC | 53,328 | +53,328 | $562.1K | +$562.1K | — |
| Centiva Capital, LP | 282,609 | +282,609 | $325.0K | +$325.0K | — |
| READYSTATE ASSET MANAGEMENT LP | 30,197 | +30,197 | $318.3K | +$318.3K | — |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 26,455 | +26,455 | $278.8K | +$278.8K | — |
| CANTOR FITZGERALD, L. P. | 25,000 | +25,000 | $263.5K | +$263.5K | — |
| JPMORGAN CHASE & CO | 19,893 | +19,893 | $209.7K | +$209.7K | — |
| UBS Group AG | 1,836 | +1,836 | $19.4K | +$19.4K | — |
| Virtu Financial LLC | 153,055 | +153,055 | $1.6K | +$1.6K | — |
| MORGAN STANLEY | 153 | +153 | $1.6K | +$1.6K | — |
Added To(4)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| MIZUHO SECURITIES USA LLC | 847,683 | +747,683 | $8.9M | +$7.8M | 747.7% |
| TORONTO DOMINION BANK | 676,300 | +551,410 | $7.1M | +$5.8M | 441.5% |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 1,894,982 | +204,846 | $20.0M | +$2.1M | 12.1% |
| MOORE CAPITAL MANAGEMENT, LP | 200,000 | +150,000 | $2.1M | +$1.6M | 300.0% |
Reduced(18)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Yakira Capital Management, Inc. | 643,960 | -963,626 | $6.8M | -$10.2M | -59.9% |
| WOLVERINE ASSET MANAGEMENT LLC | 26,238 | -863,797 | $276.5K | -$9.1M | -97.0% |
| ARISTEIA CAPITAL LLC | 1,005,240 | -710,191 | $10.6M | -$7.5M | -41.4% |
| AQR Arbitrage LLC | 1,105,491 | -692,295 | $11.7M | -$7.3M | -38.5% |
| Westchester Capital Management, LLC | 393,423 | -395,577 | $4.1M | -$4.2M | -50.1% |
| Radcliffe Capital Management, L.P. | 286,789 | -237,184 | $3.0M | -$2.5M | -45.3% |
| WHITEBOX ADVISORS LLC | 550,000 | -210,000 | $5.8M | -$2.2M | -27.6% |
| First Trust Capital Management L.P. | 314,885 | -193,279 | $3.3M | -$2.0M | -38.0% |
| GOLDMAN SACHS GROUP INC | 287,598 | -179,751 | $3.0M | -$1.9M | -38.5% |
| Bulldog Investors, LLP | 161,306 | -157,979 | $1.7M | -$1.7M | -49.5% |
| BERKLEY W R CORP | 423,595 | -157,053 | $4.5M | -$1.7M | -27.0% |
| TWO SIGMA INVESTMENTS, LP | 341,959 | -141,946 | $3.6M | -$1.5M | -29.3% |
| Periscope Capital Inc. | 125,000 | -100,000 | $1.3M | -$1.1M | -44.4% |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 205,130 | -30,889 | $2.2M | -$327.9K | -13.1% |
| GLAZER CAPITAL, LLC | 253,393 | -256,434 | $2.7K | -$2.7K | -50.3% |
| Mint Tower Capital Management B.V. | 199,799 | -100,201 | $2.1K | -$1.1K | -33.4% |
| D. E. Shaw & Co., Inc. | 990,000 | 0 | $10.4M | $0 | 0.0% |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 800 | 0 | $8.4K | $0 | 0.0% |
Sold Out(8)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Karpus Management, Inc. | 0 | -1,703,124 | $0 | -$18.0M | — |
| Calamos Advisors LLC | 0 | -925,000 | $0 | -$9.7M | — |
| Cable Car Capital, LP | 0 | -200,000 | $0 | -$2.1M | — |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 0 | -174,991 | $0 | -$1.8M | — |
| Quarry LP | 0 | -56,690 | $0 | -$598.1K | — |
| Schonfeld Strategic Advisors LLC | 0 | -39,519 | $0 | -$416.9K | — |
| PICTON MAHONEY ASSET MANAGEMENT | 0 | -687,200 | $0 | -$7.3K | — |
| Kepos Capital LP | 0 | -50,000 | $0 | -$528 | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| TENOR CAPITAL MANAGEMENT Co., L.P. | 1,894,982 | $20.0M | +204,846 | 12.1% |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 1,878,437 | $19.8M | +1,878,437 | — |
| AQR Arbitrage LLC | 1,105,491 | $11.7M | -692,295 | -38.5% |
| ARISTEIA CAPITAL LLC | 1,005,240 | $10.6M | -710,191 | -41.4% |
| D. E. Shaw & Co., Inc. | 990,000 | $10.4M | 0 | 0.0% |
| MIZUHO SECURITIES USA LLC | 847,683 | $8.9M | +747,683 | 747.7% |
| CITADEL ADVISORS LLC | 754,300 | $8.0M | +754,300 | — |
| TORONTO DOMINION BANK | 676,300 | $7.1M | +551,410 | 441.5% |
| Yakira Capital Management, Inc. | 643,960 | $6.8M | -963,626 | -59.9% |
| WHITEBOX ADVISORS LLC | 550,000 | $5.8M | -210,000 | -27.6% |
| Shay Capital LLC | 495,328 | $5.2M | +495,328 | — |
| BERKLEY W R CORP | 423,595 | $4.5M | -157,053 | -27.0% |
| MILLENNIUM MANAGEMENT LLC | 395,698 | $4.2M | +395,698 | — |
| Westchester Capital Management, LLC | 393,423 | $4.1M | -395,577 | -50.1% |
| TWO SIGMA INVESTMENTS, LP | 341,959 | $3.6M | -141,946 | -29.3% |
| First Trust Capital Management L.P. | 314,885 | $3.3M | -193,279 | -38.0% |
| GOLDMAN SACHS GROUP INC | 287,598 | $3.0M | -179,751 | -38.5% |
| Radcliffe Capital Management, L.P. | 286,789 | $3.0M | -237,184 | -45.3% |
| METEORA CAPITAL, LLC | 284,966 | $3.0M | +284,966 | — |
| Linden Advisors LP | 250,000 | $2.6M | +250,000 | — |
New & Closed Positions this quarter
Closed Positions
8 managers exited
Top five by prior-quarter value
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for GIGGW against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.