33% buyers of institutions opening or closing positions this quarter
45 more exits than new buyers, ownership fell 63.06 percentage points vs the prior quarter, and 2 well-known fund managers in the top 25.
33% buyers of institutions opening or closing positions this quarter
136.9% institutional ownership
Casdin Capital, LLC portfolio allocation
Institutional ownership vs Medical - Healthcare Information Services peers
No Form 4 insider transactions on file
Latest positioning in WGS across 13F flow, ownership shift, marquee holders, and holder-count growth.
Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in WGS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Corvex Management LP | 3.2M | $207.3M | +5.5% | 10.874% | 8.24% |
| 2 | Casdin Capital, LLC | 3.0M | $193.1M | 0.0% | 10.129% | 14.62% |
| 3 | BlackRock, Inc. | 1.6M | $99.6M | -0.6% | 5.223% | 0.00% |
| 4 | WESTFIELD CAPITAL MANAGEMENT CO LP | 1.4M | $87.9M | +34.5% | 4.612% | 0.37% |
| 5 | GOLDMAN SACHS GROUP INC | 1.3M | $85.7M | +9.4% | 4.497% | 0.01% |
| 6 | ARK Investment Management LLC | 1.3M | $85.1M | +119.1% | 4.462% | 0.66% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 859K | $55.1M | — | 2.892% | 0.00% |
| 8 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 775K | $49.8M | -4.2% | 2.611% | 0.16% |
| 9 | CITADEL ADVISORS LLC | 768K | $49.3M | +122.8% | 2.587% | 0.01% |
| 10 | Zweig-DiMenna Associates LLC | 689K | $44.3M | +15.3% | 2.322% | 6.13% |
| 11 | Nikko Asset Management Americas, Inc. | 639K | $41.0M | +67.3% | 2.152% | 0.58% |
| 12 | Sumitomo Mitsui Trust Holdings, Inc. | 633K | $40.7M | +66.0% | 2.134% | 0.03% |
| 13 | FRANKLIN RESOURCES INC | 607K | $39.0M | -44.4% | 2.045% | 0.01% |
| 14 | RAYMOND JAMES FINANCIAL INC | 610K | $38.8M | +20.7% | 2.055% | 0.01% |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 549K | $35.3M | +8.8% | 1.850% | 0.00% |
| 16 | Invesco Ltd. | 540K | $34.7M | -31.3% | 1.820% | 0.01% |
| 17 | MORGAN STANLEY | 532K | $34.2M | +5.2% | 1.793% | 0.00% |
| 18 | Prosight Management, LP | 523K | $33.6M | +851.8% | 1.763% | 5.51% |
| 19 | SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | 479K | $30.8M | -52.0% | 1.615% | 0.83% |
| 20 | STATE STREET CORP | 472K | $30.3M | +3.5% | 1.591% | 0.00% |
| 21 | EVENTIDE ASSET MANAGEMENT, LLC | 459K | $29.5M | — | 1.546% | 0.49% |
| 22 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 359K | $23.1M | +80.5% | 1.209% | 0.01% |
| 23 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 348K | $22.4M | -52.5% | 1.172% | 0.00% |
| 24 | WELLINGTON MANAGEMENT GROUP LLP | 341K | $21.9M | -11.4% | 1.149% | 0.00% |
| 25 | Capital International Investors | 325K | $20.8M | +14.6% | 1.093% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in WGS — a direct measure of their conviction.
Filings activity in WGS during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 238 | 16% | 136.93% | 63.06 pp | $2.01B | 49% |
| Q4 2025 | 283 | +8.4% | 199.99% | +0.00 pp | $3.96B | +21% |
| Q3 2025 | 261 | +14% | 199.99% | +0.00 pp | $3.27B | +8.7% |
| Q2 2025 | 228 | +2.2% | 199.99% | +41.24 pp | $3.01B | +29% |
| Q1 2025 | 223 | +15% | 158.75% | +41.98 pp | $2.33B | +36% |
| Q4 2024 | 194 | +44% | 116.77% | +62.84 pp | $1.71B | +117% |
| Q3 2024 | 135 | +57% | 53.93% | +19.35 pp | $792M | +56% |
| Q2 2024 | 86 | — | 34.58% | — | $508M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
No recent Form 4 insider transactions on file for WGS.
Quick answers to the most common questions about buying WGS stock.
Based on Q1 2026 13F filings, institutional ownership of GeneDx Holdings Corp. stands at 136.9%, held across 238 reporting institutions.
Corvex Management LP is the largest reported institutional holder of WGS, with approximately 3,228,149 shares worth $0.21B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of WGS, including ARK Investment Management LLC, CITADEL ADVISORS LLC.
Our composite Smart Money Score for WGS is 38 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
43 institutions opened new positions in WGS during Q1 2026, while 88 fully exited. 31 added to existing positions and 161 trimmed.
WGS institutional ownership fell by 63.06 percentage points quarter-over-quarter, with a net change of — holders.
The top 10 institutions account for 47.6% of all reported 13F value in WGS, and the top 25 account for 71.3%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.