ATEX insider ownership: who sold, why, and what they still hold

What stands out

Five insiders sold $22.6M with no disclosed plan: Christopher Guttman-McCabe ($12.2M), William Heard ($4.2M) and Scott Lang ($3.2M), plus 2 more. The filings don't state a reason.Christopher Guttman-McCabe: largest such sale, Jun 15, 2026 · William Heard: largest such sale, Aug 14, 2026 · Scott Lang: largest such sale, Aug 14, 2026

Scott Lang bought 3.6K shares for $75K, first on Dec 8, 2025.Purchase, Dec 8, 2025

Selling picked up in the last 90 days: officers and directors sold 160K shares, against an average of 54K per 90 days earlier in the period. Most of it was Scott Lang (50K shares in the last 90 days) and William Heard (46K shares in the last 90 days); 11% of these sales were under disclosed plans.Scott Lang: largest recent sale, Aug 14, 2026 · William Heard: largest recent sale, Aug 14, 2026

A share of stake is shown for 0 of the 10 officers and directors who sold. 13 are left out

Left out: William Heard, Timothy Gray, Leslie Daniels, Christopher Guttman-McCabe, Ryan Gerbrandt, Heather Martin, Mahvash Yazdi, Gena Ashe, Elena Marquez, Thomas Kuhn, Mark Fleischhauer, Scott Lang and Kimberly Kerr (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.

Christopher Guttman-McCabe

Chief Reg & Comm Officer

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$12.2MNo plan disclosed

Scott Lang

President and CEO, Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$4.4M27% planned 73% no plan disclosed

William Heard

Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$4.2MNo plan disclosed

Gena Ashe

Chief Legal Officer & Corp Sec

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$2.0MNo plan disclosed

Leslie Daniels

Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$1.1MNo plan disclosed

All 10 sellers

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

Recent activity

Past 30 days, Sep 17, 2026 to Oct 16, 2026

Oct 9, 2026Elena Marquez sold 5K shares ($401K) under a disclosed trading plan. 1.2K shares came in from vesting or option exercises the same day, so the holding fell by 3.8K net.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Elena Marquez Chief Financial Officer	4,981	$80.43	n/a	n/a	Oct 9, 2026	Oct 13, 2026

Oct 5, 2026Elena Marquez had 473 shares ($40K) withheld by the company for taxes (not a market sale).

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Elena Marquez Chief Financial Officer	473	$84.33	n/a	n/a	Oct 5, 2026	Oct 6, 2026

Sep 29, 2026Elena Marquez had 1.3K shares ($108K) withheld by the company for taxes (not a market sale).

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Elena Marquez Chief Financial Officer	1,325	$81.75	n/a	n/a	Sep 29, 2026	Sep 29, 2026

Sep 21, 2026Scott Lang sold 15K shares ($1.2M) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Scott Lang President and CEO, Director	15,000	$80.00	n/a	n/a	Sep 21, 2026	Sep 23, 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

Owl Creek Asset Management, L.P. 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 Anterix Inc. CEO selling stock?

Yes. Scott Lang sold 50K shares ($4.4M) in the past 12 months, 27% of it under a trading plan disclosed in the filings.

Why are Anterix Inc. insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 6% of sales by value ran under 10b5-1 trading plans disclosed in the filings, 0.5% were to cover taxes and 94% had no disclosed plan. A trading plan schedules sales in advance.

Are any Anterix Inc. insiders buying?

Yes. 1 officer or director reported 2 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 sold10 officers and directors: amount, % of holdings, trading plan

Who sold	Amount	% of holdings	Trading plan
Christopher Guttman-McCabe Chief Reg & Comm Officer	$12.2M 146K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Scott Lang President and CEO, Director	$4.4M 50K shares	Not confirmed share of stake is being verified. Why	27% under a disclosed plan 73% no plan disclosed
William Heard Director	$4.2M 46K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Gena Ashe Chief Legal Officer & Corp Sec	$2.0M 29K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Leslie Daniels Director	$1.1M 13K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Thomas Kuhn Director	$1.0M 12K shares	Not confirmed share of stake is being verified. Why	13% to cover taxes 87% no plan disclosed
Elena Marquez Chief Financial Officer	$742K 9.3K shares	Not confirmed share of stake is being verified. Why	54% under a disclosed plan 46% no plan disclosed
Heather Martin Chief Marketing Officer	$679K 8.1K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Mahvash Yazdi Director	$560K 7K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Mark Fleischhauer Director	$279K 3.5K shares	Not confirmed share of stake is being verified. Why	No plan disclosed

Outside holder, reported separately: Owl Creek Asset Management, L.P. (a 10% owner, not part of management). No open-market sales reported in the period. Latest filing

The full ownership picture0 of 13 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.

Insider

Held Oct 16, 2025

Sold

Held Oct 16, 2026

Still held

William Heard

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 William Heard are complete.

Director

n/a

−46K

n/a

Vesting, gifts, unvested awards and holding lines for William Heard

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

−7.3Kgifted (net of own trusts)

Timothy Gray

Chief Financial Officer

n/a

Vesting, gifts, unvested awards and holding lines for Timothy Gray

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Timothy Gray 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 held	Strike price	Expires	Intrinsic value (estimate)
30,731	$35.66	Oct 4, 2034	$1.4M
40,664	$27.83	Jan 16, 2035	$2.2M
53,491	$34.96	May 20, 2035	$2.5M

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Leslie Daniels

Director

n/a

−13K

n/a

Vesting, gifts, unvested awards and holding lines for Leslie Daniels

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

0gifted (net of own trusts)

Christopher Guttman-McCabe

Chief Reg & Comm Officer

n/a

−146K

n/a

Vesting, gifts, unvested awards and holding lines for Christopher Guttman-McCabe

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

0gifted (net of own trusts)

−20Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
85,000	$33.56	Aug 6, 2034	$4.1M
67,774	$27.83	Jan 16, 2035	$3.7M
53,491	$34.96	May 20, 2035	$2.5M
23,271	$60.90	May 20, 2036	$489K
11,624	$34.40	Oct 21, 2030	$552K

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Ryan Gerbrandt

Chief Operating Officer

n/a

Vesting, gifts, unvested awards and holding lines for Ryan Gerbrandt

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ryan Gerbrandt 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 held	Strike price	Expires	Intrinsic value (estimate)
60,000	$37.42	Feb 28, 2034	$2.7M
61,462	$35.66	Oct 4, 2034	$2.8M
67,774	$27.83	Jan 16, 2035	$3.7M
53,491	$34.96	May 20, 2035	$2.5M

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Heather Martin

Chief Marketing Officer

n/a

−8.1K

n/a

Vesting, gifts, unvested awards and holding lines for Heather Martin

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

0gifted (net of own trusts)

−3.5Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
17,453	$60.90	May 20, 2036	$367K

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Mahvash Yazdi

Director

n/a

−7K

n/a

Vesting, gifts, unvested awards and holding lines for Mahvash Yazdi

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

0gifted (net of own trusts)

Gena Ashe

Chief Legal Officer & Corp Sec

n/a

−29K

n/a

Vesting, gifts, unvested awards and holding lines for Gena Ashe

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

0gifted (net of own trusts)

−34Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
30,731	$35.66	Oct 4, 2034	$1.4M
24,848	$27.83	Jan 16, 2035	$1.3M
35,658	$34.96	May 20, 2035	$1.7M
17,453	$60.90	May 20, 2036	$367K

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Elena Marquez

Chief Financial Officer

n/a

−9.3K

n/a

Vesting, gifts, unvested awards and holding lines for Elena Marquez

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

0gifted (net of own trusts)

−2.3Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,227	$40.00	Apr 3, 2035	$51K
17,453	$60.90	May 20, 2036	$367K

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Thomas Kuhn

Director

n/a

−12K

n/a

Vesting, gifts, unvested awards and holding lines for Thomas Kuhn

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Thomas Kuhn 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 held	Strike price	Expires	Intrinsic value (estimate)
48,998	$33.62	Jan 2, 2034	$2.4M
7,108	$31.25	Dec 26, 2034	$360K
56,803	$29.84	Jan 22, 2035	$3.0M

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Mark Fleischhauer

Director

n/a

−3.5K

n/a

Vesting, gifts, unvested awards and holding lines for Mark Fleischhauer

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

0gifted (net of own trusts)

Scott Lang

President and CEO, Director

n/a

−50K

n/a

Vesting, gifts, unvested awards and holding lines for Scott Lang

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

0gifted (net of own trusts)

−88Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
127,538	$30.99	Jan 17, 2035	$6.5M
149,016	$34.96	May 21, 2035	$7.0M
72,839	$60.90	May 20, 2036	$1.5M

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Kimberly Kerr

Chief Revenue Officer

n/a

Vesting, gifts, unvested awards and holding lines for Kimberly Kerr

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Kimberly Kerr 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 held	Strike price	Expires	Intrinsic value (estimate)
15,913	$66.90	Jun 2, 2036	$239K

Estimate: options held × ($81.90 − strike price), using the most recent insider trade price on Form 4 (Oct 9, 2026), not a market close.

Holdings and share of stake for Anterix Inc. 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$27.1M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $27.1M across 323,640 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

Disclosed plan · $1.6M · 6%

94%

The lighter segment is sales with no plan disclosed in the filing ($25.5M), including tax-related sales outside a plan.

No plan disclosed · $25.4M

Sales with no 10b5-1 plan and no tax reference in the filing. $12.2M of it is Christopher Guttman-McCabe. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: William Heard, Aug 14, 2026

Taxes

$132K of sales (0.5%) cite tax obligations in their footnotes. Separately, 147,741 shares ($11.7M) were withheld by the company for taxes, which isn't a market sale. Example: Thomas Kuhn, Jun 18, 2026

Purchases · 1 buyer (2 trades)

1 officer or director bought shares in this period, in 2 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 26 purchase trades.

Charitable gifts · 7.3K shares

Gifts the filings describe as charitable. Gifts are not sales and are not included in the sale totals.

Seller	Shares sold	Proceeds	Under a disclosed plan	Share of total	Sales dates
Christopher Guttman-McCabe Chief Reg & Comm Officer	146K	$12.2M	0%	45%	Jun 15, 2026 to Aug 25, 2026
Scott Lang President and CEO, Director	50K	$4.4M	27%	16%	Jun 18, 2026 to Sep 21, 2026
William Heard Director	46K	$4.2M	0%	15%	Aug 14, 2026 to Aug 14, 2026
Gena Ashe Chief Legal Officer & Corp Sec	29K	$2.0M	0%	7%	Nov 18, 2025 to Sep 8, 2026
Leslie Daniels Director	13K	$1.1M	0%	4%	Sep 3, 2026 to Sep 10, 2026
Thomas Kuhn Director	12K	$1.0M	0%	4%	Jun 18, 2026 to Aug 24, 2026
Elena Marquez Chief Financial Officer	9.3K	$742K	54%	3%	Jun 17, 2026 to Oct 9, 2026
Heather Martin Chief Marketing Officer	8.1K	$679K	0%	3%	Sep 10, 2026 to Sep 10, 2026
Mahvash Yazdi Director	7K	$560K	0%	2%	Jun 16, 2026 to Jun 16, 2026
Mark Fleischhauer Director	3.5K	$279K	0%	1%	Jun 15, 2026 to Jun 15, 2026

Sales by month

Month	Sale proceeds	Disclosed plan	To cover taxes	No plan disclosed
Oct 2025	$0	$0	$0	$0
Nov 2025	$138K	$0	$0	$138K
Dec 2025	$0	$0	$0	$0
Jan 2026	$0	$0	$0	$0
Feb 2026	$0	$0	$0	$0
Mar 2026	$0	$0	$0	$0
Apr 2026	$0	$0	$0	$0
May 2026	$0	$0	$0	$0
Jun 2026	$12.8M	$0	$132K	$12.7M
Jul 2026	$0	$0	$0	$0
Aug 2026	$10.4M	$0	$0	$10.4M
Sep 2026	$3.3M	$1.2M	$0	$2.1M
Oct 2026	$401K	$401K	$0	$0

Is this normal? Selling year by year5 earlier years to compare with

More than usual: $27.1M sold, after almost none in the past 5 years. 10 insiders sold; the average is 4 a year.

12 months ending	Shares sold	Insiders who sold	Proceeds
Oct 16, 2026 Latest 12 months	324K	10	$27.1M
Oct 16, 2025 1 year earlier	55K	3	$2.0M
Oct 16, 2024 2 years earlier	51K	2	$1.6M
Oct 17, 2023 3 years earlier	62K	3	$1.9M
Oct 17, 2022 4 years earlier	84K	3	$4.2M
Oct 17, 2021 5 years earlier	250K	7	$12.6M

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 uncertainty13 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Anterix Inc. 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 methodology539 filings on record, 49 filed in the 12-month period, and how we read them

All 539 Forms 3, 4 and 5 on record for Anterix Inc. (SEC CIK 1304492), filed from Jan 30, 2015 to Oct 13, 2026; 49 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 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 (23)No filing in 18 months; last reported balances, not in any total

Name	Last filed	Last reported balance
Morgan Obrien	Dec 17, 2024	23,973 shares, last reported balance as of Dec 16, 2024
Robert Schwartz	Aug 26, 2024	115,867 shares, last reported balance as of Aug 23, 2024
Paul Saleh	Aug 30, 2023	24,175 shares, last reported balance as of Aug 28, 2023
Singleton McAllister	Aug 30, 2023	21,599 shares, last reported balance as of Aug 28, 2023
Greg Haller	Aug 30, 2023	17,414 shares, last reported balance as of Aug 28, 2023
Gregory Pratt	Aug 30, 2023	13,939 shares, last reported balance as of Aug 28, 2023
Hamid Akhavan	Nov 18, 2021	10,706 shares, last reported balance as of Nov 17, 2021
Elaine Gangeri	May 24, 2021	36,646 shares, last reported balance as of May 24, 2021
Brian McAuley	Sep 2, 2020	343,981 shares, last reported balance as of Sep 1, 2020
Thomas Akers	Jun 15, 2020	5,095 shares, last reported balance as of Jun 15, 2020
Stephen Feinberg	Oct 15, 2019	3,470,199 shares, last reported balance as of Oct 11, 2019
Mark Hennessy	Aug 15, 2019	10,881 shares, last reported balance as of Aug 6, 2019
Rachelle Chong	Aug 8, 2019	5,145 shares, last reported balance as of Aug 6, 2019
Greg Cominos	Aug 8, 2019	5,145 shares, last reported balance as of Aug 6, 2019
Thomas Sidman	Sep 11, 2018	24,880 shares, last reported balance as of Sep 10, 2018
FIE II LLC	Aug 22, 2018	1,449,900 shares, last reported balance as of Aug 20, 2018
Richard Rohmann	Jul 17, 2018	22,656 shares, last reported balance as of Jul 13, 2018
John Pescatore	Jun 11, 2018	83,121 shares, last reported balance as of Jun 7, 2018
Peter Schiff	Aug 4, 2017	244,538 shares, last reported balance as of Aug 3, 2017
John Sites Jr.	Aug 4, 2017	43,506 shares, last reported balance as of Aug 3, 2017
Frank Creede	Jun 9, 2017	43,221 shares, last reported balance as of Jun 8, 2017
Harvey Frazier	Jun 9, 2017	13,364 shares, last reported balance as of Jun 8, 2017
Andrew Daskalakis	Aug 12, 2016	67,342 shares, last reported balance as of Aug 10, 2016

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.

Anterix Inc. insiders sold $27.1M in the past 12 months. How much of their stake is that?

What stands out

Who sold, and how much of their stake

Selling by month

Recent activity

Outside holders, reported separately

Common questions

Is the Anterix Inc. CEO selling stock?

Why are Anterix Inc. insiders selling?

Are any Anterix Inc. insiders buying?

The evidence

No plan disclosed · $25.4M

Taxes

Purchases · 1 buyer (2 trades)

Charitable gifts · 7.3K shares

Sales by month