Form 13-F position report Filing season in progress

GENEDX HOLDINGS CORP

Reported by Zweig-DiMenna Associates LLC

Company profile Manager portfolio Source filing
WGS CUSIP 81663L200 Manager CIK 0001533950
Latest reported change

Reported 358,100 shares, down 213,850 (37.4%) from the prior quarter.

Reported value -34.1%; share count -37.4% vs. the prior quarter.

Reduced
% of reported 13F value 1.99% This manager · Q3 2026
Shares 358,100 Quarter-end amount reported
Reported value $25,890,630 Fair value at quarter end
Consecutive quarters held 8 Through Q3 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.

8 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
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
Institutional context

Who else reported the position

120 managers reported GENEDX HOLDINGS CORP for Q3 2026 so far.

Manager Activity Shares Change % of reported 13F Reported value Tenure
WILLIAM BLAIR INVESTMENT MANAGEMENT LLC Added 1,560,247 +159,594 0.37% $112,805,858 8 qtrs
Sumitomo Mitsui Trust Holdings Inc Reduced 661,809 -4,772 0.03% $47,848,791 5 qtrs
Assenagon Asset Management S A Added 632,413 +328,980 0.04% $45,723,460 10 qtrs
GEODE CAPITAL MANAGEMENT LLC Added 559,878 +7,753 < 0.01% $40,487,570 14 qtrs
GAGNON SECURITIES LLC Reduced 516,284 -8,581 6.47% $37,327,333 14 qtrs
Zweig-DiMenna Associates LLC This report Reduced 358,100 -213,850 1.99% $25,890,630 8 qtrs
abrdn plc Reduced 322,405 -134,796 0.03% $23,309,882 3 qtrs
DIMENSIONAL FUND ADVISORS LP Added 287,165 +6,546 < 0.01% $20,767,173 8 qtrs
Thrivent Financial for Lutherans Added 227,628 +125,636 0.03% $16,457,000 6 qtrs
Gagnon Advisors LLC Reduced 163,024 -14,846 6.47% $11,786,635 14 qtrs
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Filing details and methodology As reported
Report period
September 30, 2026
Filed
November 06, 2026
Filing type
13F-HR
Position type
COM CL A

Voting authority reported

Sole
358,100
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.