Reported 689,290 shares, up 91,465 (15.3%) from the prior quarter.
Reported value -43.1%; share count 15.3% vs. the prior quarter.
Reported position value by quarter
Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.
| Date | Holding Value |
|---|---|
| 2024-12-31 | 23788170 |
| 2025-03-31 | 40483062 |
| 2025-06-30 | 54102891 |
| 2025-09-30 | 64891802 |
| 2025-12-31 | 77753120 |
| 2026-03-31 | 44266204 |
| 2026-06-30 | 39264368 |
| 2026-09-30 | 25890630 |
Quarterly position history
How this manager's reported quarter-end position changed over time.
| Quarter | Activity | Shares | Change | % of reported 13F | Reported value | Filed | Source filing |
|---|---|---|---|---|---|---|---|
| Q3 2026 | Reduced | 358,100 | -213,850 (-37.4%) | 1.99% | $25,890,630 | 2026-11-06 | |
| Q2 2026 | Reduced | 571,950 | -117,340 (-17.0%) | 3.56% | $39,264,368 | 2026-08-13 | |
| Q1 2026 | Added | 689,290 | +91,465 (15.3%) | 6.13% | $44,266,204 | 2026-05-05 | |
| Q4 2025 | Reduced | 597,825 | -4,475 (-0.7%) | 4.83% | $77,753,120 | 2026-02-10 | |
| Q3 2025 | Added | 602,300 | +16,200 (2.8%) | 4.54% | $64,891,802 | 2025-11-07 | |
| Q2 2025 | Added | 586,100 | +129,000 (28.2%) | 5.12% | $54,102,891 | 2025-08-05 | |
| Q1 2025 | Added | 457,100 | +147,600 (47.7%) | 6.41% | $40,483,062 | 2025-05-07 | |
| Q4 2024 | New | 309,500 | +309,500 (0.0%) | 1.78% | $23,788,170 | 2025-01-21 |
Who else reported the position
329 managers reported GENEDX HOLDINGS CORP for Q1 2026.
| Manager | Activity | Shares | Change | % of reported 13F | Reported value | Tenure |
|---|---|---|---|---|---|---|
| Corvex Management LP | Added | 3,228,149 | +169,520 | 8.24% | $207,311,729 | 12 qtrs |
| Casdin Capital LLC | Unchanged | 3,007,164 | 0 | 14.62% | $193,120,072 | 12 qtrs |
| BlackRock Inc | Reduced | 1,550,708 | -9,386 | < 0.01% | $99,586,463 | 7 qtrs |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Added | 1,369,108 | +350,847 | 0.37% | $87,924,116 | 5 qtrs |
| The Goldman Sachs Group Inc | Added | 1,334,980 | +114,478 | < 0.01% | $85,732,415 | 12 qtrs |
| ARK Investment Management LLC | Added | 1,324,583 | +720,022 | 0.66% | $85,064,722 | 3 qtrs |
| VANGUARD CAPITAL MANAGEMENT LLC | New | 858,583 | +858,583 | < 0.01% | $55,138,200 | 1 qtr |
| WILLIAM BLAIR INVESTMENT MANAGEMENT LLC | Reduced | 775,269 | -33,941 | 0.16% | $49,787,775 | 6 qtrs |
| Zweig-DiMenna Associates LLC This report | Added | 689,290 | +91,465 | 6.13% | $44,266,204 | 6 qtrs |
| CITADEL ADVISORS LLC | Added | 647,401 | +465,050 | < 0.01% | $41,576,093 | 12 qtrs |
Filing details and methodology As reported
- Report period
- March 31, 2026
- Filed
- May 05, 2026
- Filing type
- 13F-HR
- Position type
- COM CL A
Voting authority reported
- Sole
- 689,290
- Shared
- 0
- None
- 0
“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.
Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.