Form 13-F position report

GENEDX HOLDINGS CORP

Reported by ALLIANCEBERNSTEIN L P

Company profile Manager portfolio Source filing
WGS CUSIP 81663L200 Manager CIK 0001109448
Latest reported change

Reported 20,050 shares, down 233,404 (92.1%) from the prior quarter.

Reported value -92.1%; share count -92.1% vs. the prior quarter.

Reduced
% of reported 13F value < 0.01% This manager · Q1 2026
Shares 20,050 Quarter-end amount reported
Reported value $2,607,703 Fair value at quarter end
Consecutive quarters held 8 Through Q1 2026

Reported position value by 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.

Manager history

Quarterly position history

How this manager's reported quarter-end position changed over time.

9 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q2 2026 Unchanged 20,050 0 (0.0%) < 0.01% $1,287,611 2026-08-14
Q1 2026 Reduced 20,050 -233,404 (-92.1%) < 0.01% $2,607,703 2026-05-15
Q4 2025 Reduced 253,454 -106,609 (-29.6%) 0.01% $32,964,227 2026-02-17
Q3 2025 Reduced 360,063 -26,695 (-6.9%) 0.01% $38,793,188 2025-11-14
Q2 2025 Reduced 386,758 -50,142 (-11.5%) 0.01% $35,701,631 2025-08-14
Q1 2025 Added 436,900 +423,050 (3054.5%) 0.01% $38,694,049 2025-05-15
Q4 2024 Added 13,850 +5,900 (74.2%) < 0.01% $1,064,511 2025-02-12
Q3 2024 Added 7,950 +70 (0.9%) < 0.01% $337,398 2024-11-14
Q2 2024 New 7,880 +7,880 (0.0%) < 0.01% $205,983 2024-08-14
Institutional context

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 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
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Filing details and methodology As reported
Report period
March 31, 2026
Filed
May 15, 2026
Filing type
13F-HR
Position type
COM CL A

Voting authority reported

Sole
19,350
Shared
0
None
700

“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.