Iridium Communications IRDM Insider Ownership

NASDAQ IRDM

$44.29 +0.35 (+0.80%)

As of: Oct 21, 2026 · 2:18 PM EDT

Insider Holdings by Owner

4.15Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

3.36%

▼-0.617% pp QoQ

Shares Held by Insiders

3.60Mn

filed for Sep 2026

▼-15.51% QoQ

Shares Outstanding

106.97Mn

106,969,000 shares

Direct Holdings

3.44Mn

Indirect: 160.98K

Net Shares Traded (QoQ)

-660.37K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, IRDM insiders bought $871,300 of stock (50K shares) and sold $20.39 million (428.5K shares) on the open market.

A count shows 2 insiders buying IRDM stock on the open market over the past 12 months and 6 insiders selling.
Among IRDM's insiders, Robert H. Niehaus (Director) was the top open-market buyer in the past 12 months, with $524,700 of stock purchased (30K shares) and the latest purchase on October 28, 2025.
Conversely, Thomas Fitzpatrick (Director) was IRDM's largest open-market seller in the past 12 months, with $11.81 million of sales (255.25K shares); the latest was on August 18, 2026.
The newest open-market trade among Iridium Communications insiders came on September 15, 2026, when Timothy James Last (EVP, Sales & Marketing) made a sale of 5.77K shares for $267,393.
In transactions other than open-market trades, Iridium Communications insiders received 990.21K shares in stock awards, gave up 203.43K shares to cover taxes or exercise prices and gave away 67.4K shares as gifts over the past 12 months.
Per Business Quant, IRDM insiders together hold 3.6Mn shares based on their latest Form 4 filings, down 15.51% from 4.26Mn shares at the end of Q2 2026 and up 1.72% from 3.54Mn shares at the end of Q3 2025.
Of the 3.6Mn shares held by Iridium Communications insiders, 3.44Mn shares (95.52%) are held directly and 160.98K shares (4.48%) indirectly, through trusts, partnerships, family members and other entities.
The insider holdings in Iridium Communications belong to 19 insiders who have reported on Form 4 within the past two years.
IRDM's largest insider holders by reported holdings are Matthew J. Desch (Chief Executive Officer, 1.44Mn shares), A. B. Krongard (Director, 527.52K shares) and Suzanne E. McBride (Chief Operations Officer, 260.99K shares).
The largest insider, Matthew J. Desch, holds 40.07% of IRDM's insider total.
Institutional holders reported 85.30% of Iridium Communications' outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 3.36%, and other investors, including the public, hold the remaining 11.34%.
Over the past 12 months, 18 insiders reported transactions in Iridium Communications stock in 98 Form 4 filings.
The insider holdings and trades above for Iridium Communications reflect Form 4 filings through October 2, 2026.

Form 4 Holdings

Insiders Holding IRDM

Insiders 24

Shares held 4.15Mn

Of outstanding 3.88%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Matthew J Desch	Chief Executive Officer	1,441,434	1,441,434	34.8%	02 Sep, 2026
2	A B Krongard	Director	366,542	366,542	8.8%	02 Apr, 2026
3	Robert H Niehaus	Director	310,226	310,226	7.5%	02 Oct, 2026
4	Suzanne E. Mcbride	Chief Operations Officer	260,991	260,991	6.3%	02 Sep, 2026
5	Scott Scheimreif	Evp Government Programs	257,552	257,552	6.2%	02 Sep, 2026
6	Thomas C Canfield	Director	235,028	235,028	5.7%	02 Oct, 2026
7	Parker William Rush	Director	168,812	168,812	4.1%	03 Jan, 2024
8	Eric T Olson	Director	150,122	150,122	3.6%	02 Oct, 2026
9	Vincent James O'Neill	Chief Financial Officer	126,944	126,944	3.1%	02 Sep, 2026
10	Kathleen A. Morgan	Chief Legal Officer	122,818	122,818	3.0%	02 Sep, 2026
11	Steven B Pfeiffer	Director	111,487	111,487	2.7%	09 Mar, 2022
12	Bryan J. Hartin	Evp Sales And Marketing	94,928	94,928	2.3%	23 Dec, 2024
13	Timothy James Last	Evp, Sales Marketing	84,130	84,130	2.0%	16 Sep, 2026
14	Jane L. Harman	Director	60,818	60,818	1.5%	02 Apr, 2024
15	Barry West	Director	52,547	52,547	1.3%	03 Apr, 2023
16	Henrik O. Schliemann	Director	51,285	51,285	1.2%	03 Apr, 2023
17	Leon Anthony Frazier	Director	46,611	46,611	1.1%	02 Oct, 2026
18	Thomas Fitzpatrick	Chief Financial Officer	43,315	43,315	1.0%	02 Oct, 2026
19	Donald Lee Thoma	Evp, Aireon	41,949	41,949	1.0%	13 Jul, 2026
20	Timothy Kapalka	Cao Iridium Satellite Llc	35,038	35,038	0.8%	02 Sep, 2026
21	Kay Sears	Director	30,148	30,148	0.7%	02 Oct, 2026
22	Jacqueline E Yeaney	Director	25,374	25,374	0.6%	02 Oct, 2026
23	Monique S. Shivanandan	Director	15,989	15,989	0.4%	02 Oct, 2026
24	Louis M Alterman	Director	13,853	13,853	0.3%	02 Oct, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

7,102 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
30 Sep, 2026	Jacqueline E Yeaney	Director	Acquired A	34	$0.00	$0	25,374	Direct
30 Sep, 2026	Thomas C Canfield	Director	Acquired A	734	$0.00	$0	235,028	Direct
30 Sep, 2026	Louis M Alterman	Director	Acquired A	43	$0.00	$0	13,853	Direct
30 Sep, 2026	Robert H Niehaus	Director	Acquired A	56	$0.00	$0	43,315	Direct
30 Sep, 2026	Eric T Olson	Director	Acquired A	442	$0.00	$0	150,122	Direct
30 Sep, 2026	Leon Anthony Frazier	Director	Acquired A	107	$0.00	$0	46,611	Direct
30 Sep, 2026	Monique S. Shivanandan	Director	Acquired A	50	$0.00	$0	15,989	Direct
30 Sep, 2026	Kay Sears	Director	Acquired A	34	$0.00	$0	30,148	Direct
30 Sep, 2026	Thomas Fitzpatrick	Director	Acquired A	56	$0.00	$0	43,315	Direct
15 Sep, 2026	Timothy James Last	Evp, Sales Marketing	Disposed S	5,769	$46.35	$267.39K	84,130	Direct
03 Sep, 2026	Timothy James Last	Evp, Sales Marketing	Disposed S	2,013	$47.36	$95.34K	89,899	Direct
01 Sep, 2026	Matthew J Desch	Chief Executive Officer	Disposed F	9,583	$46.98	$450.21K	1,441,434	Direct
01 Sep, 2026	Scott Scheimreif	Evp Government Programs	Disposed F	2,207	$46.98	$103.68K	257,552	Direct
01 Sep, 2026	Suzanne E. Mcbride	Chief Operations Officer	Disposed F	3,623	$46.98	$170.21K	260,991	Direct
01 Sep, 2026	Timothy Kapalka	Cao Iridium Satellite Llc	Disposed F	693	$46.98	$32.56K	35,038	Direct
01 Sep, 2026	Timothy James Last	Evp, Sales Marketing	Disposed F	1,501	$46.98	$70.52K	91,912	Direct
01 Sep, 2026	Kathleen A. Morgan	Chief Legal Officer	Disposed F	2,053	$46.98	$96.45K	122,818	Direct
01 Sep, 2026	Vincent James O'Neill	Chief Financial Officer	Disposed F	1,461	$46.98	$68.64K	126,944	Direct
20 Aug, 2026	Suzanne E. Mcbride	Chief Operations Officer	Disposed G	17,403	$0.00	$0	264,614	Direct
17 Aug, 2026	Thomas Fitzpatrick	Director	Disposed S	209,233	$50.22	$10.51Mn	58,306	Direct

Showing 1 to 20 of 7,102 transactions