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Who

Christopher Heim

Director

Company insider

Files Form 4 as: Director, Digi International; President of Amcom Software, Spok Holdings.

In numbers

Trades disclosed
22
Buys
2
Sells
0
Bought
$154K
Sold
$0
Companies
2
Companies where not an officer
1
First trade
7 Apr 2011
Last trade
9 Feb 2026
Last filed
11 Feb 2026

Companies traded

Where they are an officer
SPOK Spok HoldingsDirector, Officer · Telecom Carriers · last 23 Jul 20132 buys · 0 sells
Everywhere else they filed: board seats, 10% stakes, other companies
DGII Digi InternationalDirector · Hardware, Devices & Storage · last 9 Feb 20260 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
9 Feb 2026filed 11 Feb 2026DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—4,066 at $0.00filing
9 Feb 2026filed 11 Feb 2026DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—4,066 at $0.00filing
10 Feb 2025filed 12 Feb 2025DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—3,977 at $0.00filing
5 Feb 2024filed 7 Feb 2024DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—4,498 at $0.00filing
6 Feb 2023filed 8 Feb 2023DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—3,294 at $0.00filing
7 Feb 2022filed 9 Feb 2022DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—5,358 at $0.00filing
8 Feb 2021filed 10 Feb 2021DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—7,125 at $0.00filing
12 May 2020filed 14 May 2020DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—2,218 at $0.00filing
4 Feb 2020filed 6 Feb 2020DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—7,638 at $0.00filing
5 Feb 2019filed 7 Feb 2019DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—9,828 at $0.00filing
30 Jan 2018filed 1 Feb 2018DGII Digi InternationalHardware, Devices & StorageSEC FORM 4 Code A—12,586 at $0.00filing
23 Jul 2013filed 25 Jul 2013SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Code D—3,189 at $0.00filing
1 Jul 2013filed 1 Jul 2013SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Code A$10K737 at $13.57filing
1 Apr 2013filed 2 Apr 2013SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Code A$10K754 at $13.27filing
2 Jan 2013filed 3 Jan 2013SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Code A$9,998856 at $11.68filing
1 Oct 2012filed 1 Oct 2012SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Code A$9,995842 at $11.87filing
30 Jun 2012filed 2 Jul 2012SPOK Spok Holdingsoption or derivative · Telecom CarriersSEC FORM 4 Code D—50,647 at $0.00filing
30 Jun 2012filed 2 Jul 2012SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Code D—0 at $0.00filing
9 May 2011filed 9 May 2011SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Bought$102K6,682 at $15.30filing
6 May 2011filed 9 May 2011SPOK Spok HoldingsTelecom CarriersSEC FORM 4 Bought$51K3,318 at $15.47filing

News

Reviewing Spok (NASDAQ:SPOK) and SurgePays (NASDAQ:SURG)SPOK · themarketsdaily.com · 15 Oct 2026

0 headlines in the last 90 days name Christopher Heim; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.

Sectors

Communications2

Buys in green, sells in red, by the company’s sector.

Related people

Todd J. SteinDirector · Director at Spok Holdings, filing Form 4 there in the last year
Brett A. ShockleyDirector · Director at Spok Holdings, filing Form 4 there in the last year
Christine CournoyerDirector · Director at Spok Holdings, filing Form 4 there in the last year
Randy HyunDirector · Director at Spok Holdings, filing Form 4 there in the last year
Barbara Peterson ByrneDirector · Director at Spok Holdings, filing Form 4 there in the last year
Sharon Woods-KeislingCorporate Secretary, Treasurer · Also traded SPOK in the last 90 days