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WGSGeneDx Holdings Corp. · Insider ownership research

GeneDx Holdings Corp. insiders sold $21.8M in the past 12 months. How much of their stake is that?

Insiders sold $21.8M in the past 12 months.2% was sold under disclosed trading plans, 70% to cover taxes, 28% with no plan disclosed. The largest seller, Katherine Stueland (Chief Executive Officer, Director), sold $11.5M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why

Updated Oct 13, 2026 from SEC filings · covers Oct 14, 2025 to Oct 13, 2026
1
buyer among officers and directors (5 trades), past 12 months
2.3%
of sales were under disclosed trading plans, past 12 months
4 of 11
officers and directors sold shares, past 12 months
Is this normal? Less than usual: about one-eighth of the 5-year average. 4 insiders sold; the average is 5 a year. Year by year
Latest filing: Filed Sep 18 for a sale on Sep 16. Katherine Stueland sold 11K shares ($1.0M) to cover taxes on vesting stock. Filing
SEC ownership filings: 52 filed in the 12 months to Oct 13, 2026; 438 on record since Sep 1, 2020 · See the evidence

What stands out

Eli Casdin bought 700K shares for $32.6M, first on May 18, 2026.Purchase, Jun 4, 2026
Joshua Ruch sold $6.1M of stock with no disclosed trading plan. The filings don't state a reason.Largest such sale, Nov 24, 2025

A share of stake is shown for 0 of the 4 officers and directors who sold. 11 are left out

i
Left out: Eli Casdin, Keith Meister, Joshua Ruch, Jason Ryan, Richard Pfenniger Jr., Emily Leproust, Kevin Feeley, Katherine Stueland, Bryan Dechairo, Thomas Fuchs and Mark Gardner (share of stake is being verified).
Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.

Katherine Stueland
Chief Executive Officer, Director
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$11.5MTo cover taxes
Joshua Ruch
Director
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$6.1MNo plan disclosed
Kevin Feeley
Chief Financial Officer
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$3.4MTo cover taxes
Bryan Dechairo
Chief Operating Officer
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$851K60% planned, 40% to cover taxes
Amounts, filings and trading plans for each seller

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planTo cover taxesNo plan disclosedOne dollar scale for every month; the tallest bar is labeled
Oct 2025: $348K to cover taxesOctNov 2025: $6.1M no plan disclosedNovDec 2025: $3.0M to cover taxesDecJan 2026: $185K to cover taxesJanFeb 2026: $511K under a disclosed planFeb 2026: $340K to cover taxesFebMar 2026: $8.2M to cover taxes$8.2MMarApr 2026: $167K to cover taxesAprMayJun 2026: $1.1M to cover taxesJunJulAugSep 2026: $1.8M to cover taxesSepOct

Recent activity

Past 30 days, Sep 14, 2026 to Oct 13, 2026
Sep 16, 20262 executives sold 14K shares ($1.4M) to cover taxes on vesting stock. 26K shares came in from vesting or option exercises the same day, so their combined holdings rose by 12K net.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Katherine Stueland
Chief Executive Officer, Director
10,501$97.61n/an/aSep 16, 2026Sep 18, 2026
Kevin Feeley
Chief Financial Officer
3,728$97.61n/an/aSep 16, 2026Sep 18, 2026

"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Outside holders, reported separately

Keith Meister reported no open-market sales in the past 12 months. Large shareholders and the funds or companies that board members represent are not part of management, so they are left out of the figures above.

Details

Common questions

Is the GeneDx Holdings Corp. CEO selling stock?

Yes. Katherine Stueland sold 142K shares ($11.5M) in the past 12 months, none of it under a trading plan disclosed in the filings.

Why are GeneDx Holdings Corp. insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 2% of sales by value ran under 10b5-1 trading plans disclosed in the filings, 70% were to cover taxes and 28% had no disclosed plan. A trading plan schedules sales in advance.

Are any GeneDx Holdings Corp. insiders buying?

Yes. 1 officer or director reported 5 purchases in the past 12 months (Form 4 code P; rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust are not counted).

The evidence

Who sold4 officers and directors: amount, % of holdings, trading plan
Who soldAmount% of holdingsTrading plan
Katherine Stueland
Chief Executive Officer, Director
$11.5M
142K shares
Not confirmed
share of stake is being verified. Why
To cover taxes
Joshua Ruch
Director
$6.1M
38K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Kevin Feeley
Chief Financial Officer
$3.4M
40K shares
Not confirmed
share of stake is being verified. Why
To cover taxes
Bryan Dechairo
Chief Operating Officer
$851K
9.4K shares
Not confirmed
share of stake is being verified. Why
60% under a disclosed plan, 40% to cover taxes

Board members representing outside shareholders, reported separately: Keith Meister. Details

The full ownership picture0 of 11 officers and directors confirmed

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

InsiderHeld Oct 13, 2025SoldHeld Oct 13, 2026Still held
Eli Casdin
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Eli Casdin are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Eli Casdin

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Eli Casdin are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Keith Meister
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Keith Meister are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Keith Meister

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Keith Meister are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Joshua Ruch
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Joshua Ruch are complete.
Director
n/a−38Kn/an/a
Vesting, gifts, unvested awards and holding lines for Joshua Ruch

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Joshua Ruch are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Jason Ryan
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jason Ryan are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Jason Ryan

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jason Ryan are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Richard Pfenniger Jr.
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Richard Pfenniger Jr. are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Richard Pfenniger Jr.

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Richard Pfenniger Jr. are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Emily Leproust
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Emily Leproust are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Emily Leproust

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Emily Leproust are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Kevin Feeley
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Kevin Feeley are complete.
Chief Financial Officer
n/a−40Kn/an/a
Vesting, gifts, unvested awards and holding lines for Kevin Feeley

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Kevin Feeley are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options heldStrike priceExpiresIntrinsic value (estimate)
4,982$32.67Aug 31, 2032$330K

Estimate: options held × ($99.00 − strike price), using the most recent insider trade price on Form 4 (Sep 16, 2026), not a market close.

Katherine Stueland
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Katherine Stueland are complete.
Chief Executive Officer, Director
n/a−142Kn/an/a
Vesting, gifts, unvested awards and holding lines for Katherine Stueland

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Katherine Stueland are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Bryan Dechairo
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Bryan Dechairo are complete.
Chief Operating Officer
n/a−9.4Kn/an/a
Vesting, gifts, unvested awards and holding lines for Bryan Dechairo

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Bryan Dechairo are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Thomas Fuchs
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Thomas Fuchs are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Thomas Fuchs

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Thomas Fuchs are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Mark Gardner
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Mark Gardner are complete.
President
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Mark Gardner

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Mark Gardner are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Holdings and share of stake for GeneDx Holdings Corp. are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

What explains the selling$21.8M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $21.8M across 229,057 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

The lighter segment is sales with no plan disclosed in the filing ($21.3M), including tax-related sales outside a plan.

No plan disclosed · $6.1M

Sales with no 10b5-1 plan and no tax reference in the filing. $6.1M of it is Joshua Ruch. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Joshua Ruch, Nov 24, 2025

Taxes

$15.2M of sales (69.7%) cite tax obligations in their footnotes. Example: Katherine Stueland, Sep 16, 2026

Purchases · 1 buyer (5 trades)

1 officer or director bought shares in this period, in 5 trades(Form 4 code P, leaving out rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust). Across all their filings on record there are 24 purchase trades.

SellerShares soldProceedsUnder a disclosed planShare of totalSales dates
Katherine Stueland
Chief Executive Officer, Director
142K$11.5M0%53%Oct 29, 2025 to Sep 16, 2026
Joshua Ruch
Director
38K$6.1M0%28%Nov 24, 2025 to Nov 24, 2025
Kevin Feeley
Chief Financial Officer
40K$3.4M0%15%Oct 29, 2025 to Sep 16, 2026
Bryan Dechairo
Chief Operating Officer
9.4K$851K60%4%Feb 2, 2026 to Feb 4, 2026

Sales by month

MonthSale proceedsDisclosed planTo cover taxesNo plan disclosed
Oct 2025$348K$0$348K$0
Nov 2025$6.1M$0$0$6.1M
Dec 2025$3.0M$0$3.0M$0
Jan 2026$185K$0$185K$0
Feb 2026$851K$511K$340K$0
Mar 2026$8.2M$0$8.2M$0
Apr 2026$167K$0$167K$0
May 2026$0$0$0$0
Jun 2026$1.1M$0$1.1M$0
Jul 2026$0$0$0$0
Aug 2026$0$0$0$0
Sep 2026$1.8M$0$1.8M$0
Oct 2026$0$0$0$0
Board members representing outside shareholders (1)Listed and sourced; not part of the management totals or the answer line

Directors whose reported holdings sit mostly in an investment fund or a corporate shareholder they represent, not in their own name, with beneficial ownership disclaimed except for their own financial interest. Listed and sourced here; not part of the management totals or the answer line. Shares a fund hands to its own investors are distributions, not sales.

Board memberHeld Oct 13, 2025SoldHeld Oct 13, 2026Still held
Keith Meister
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Keith Meister are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Keith Meister

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Keith Meister are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Is this normal? Selling year by year5 earlier years to compare with

Less than usual: about one-eighth of the 5-year average. 4 insiders sold; the average is 5 a year.

12 months endingShares soldInsiders who soldProceeds
Oct 13, 2026
Latest 12 months
229K4$21.8M
Oct 13, 2025
1 year earlier
1.00M4$106M
Oct 13, 2024
2 years earlier
967K5$2.6M
Oct 14, 2023
3 years earlier
7.16M6$3.1M
Oct 14, 2022
4 years earlier
327K9$1.5M
Oct 14, 2021
5 years earlier
00$0

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertainty11 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for GeneDx Holdings Corp. are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology438 filings on record, 52 filed in the 12-month period, and how we read them

All 438 Forms 3, 4 and 5 on record for GeneDx Holdings Corp. (SEC CIK 1818331), filed from Sep 1, 2020 to Sep 18, 2026; 52 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 13, 2026. Prices are the ones reported in each filing, often weighted averages.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (20)No filing in 18 months; last reported balances, not in any total

Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.