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Who

Mika Nishimura

Director

Company insider

Files Form 4 as: Director, Si-Bone; Director, Accuray.

In numbers

Trades disclosed
19
Buys
0
Sells
2
Bought
$0
Sold
$154K
Companies
2
Companies where not an officer
2
First trade
4 Mar 2021
Last trade
4 Jun 2026
Last filed
8 Jun 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
SIBN Si-BoneDirector · Medical Devices · last 4 Jun 20260 buys · 2 sells
ARAY AccurayDirector · Medical Devices · last 28 Nov 20250 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
10Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
4 Jun 2026filed 8 Jun 2026SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—10,957 at $0.00filing
4 Jun 2026filed 8 Jun 2026SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—10,957 at $0.00filing
12 Mar 2026filed 13 Mar 2026SIBN Si-BoneMedical DevicesSEC FORM 4 Sold$57K4,100 at $13.83filing
12 Mar 2026filed 13 Mar 2026SIBN Si-BoneMedical DevicesSEC FORM 4 Sold$57K4,100 at $13.83filing
28 Nov 2025filed 2 Dec 2025ARAY Accurayoption or derivative · Medical DevicesSEC FORM 4 Code A—56,603 at $0.00filing
21 Nov 2025filed 25 Nov 2025ARAY Accurayoption or derivative · Medical DevicesSEC FORM 4 Code M—56,603 at $0.00filing
21 Nov 2025filed 25 Nov 2025ARAY AccurayMedical DevicesSEC FORM 4 Code M—56,603 at $0.00filing
5 Jun 2025filed 6 Jun 2025SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—8,675 at $0.00filing
29 Nov 2024filed 3 Dec 2024ARAY Accurayoption or derivative · Medical DevicesSEC FORM 4 Code A—56,603 at $0.00filing
26 Jun 2024filed 27 Jun 2024SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—8,791 at $0.00filing
13 Mar 2024filed 14 Mar 2024SIBN Si-BoneMedical DevicesSEC FORM 4 Sold$41K2,500 at $16.22filing
30 Nov 2023filed 4 Dec 2023ARAY AccurayMedical DevicesSEC FORM 4 Code A—56,603 at $0.00filing
9 Jun 2023filed 13 Jun 2023SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—4,866 at $0.00filing
30 Nov 2022filed 7 Dec 2022ARAY AccurayMedical DevicesSEC FORM 4 Code A—59,055 at $0.00filing
16 Jun 2022filed 21 Jun 2022SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—8,324 at $0.00filing
30 Nov 2021filed 2 Dec 2021ARAY AccurayMedical DevicesSEC FORM 4 Code A$150K31,185 at $4.81filing
31 Aug 2021filed 2 Sep 2021ARAY AccurayMedical DevicesSEC FORM 4 Code A$37K9,213 at $4.07filing
4 Mar 2021filed 8 Mar 2021SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—447 at $0.00filing
4 Mar 2021filed 8 Mar 2021SIBN Si-BoneMedical DevicesSEC FORM 4 Code A—8,213 at $0.00filing

Sectors

Health Care2

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

Related people

Laura FrancisChief Executive Officer · Chief Executive Officer at Si-Bone, filing Form 4 there in the last year
Richard A. MeierDirector · Director at Accuray, filing Form 4 there in the last year
Michael A. PisetskySVP, Ops & Adm/Chief Legal Ofr · SVP, Ops & Adm/Chief Legal Ofr at Si-Bone, filing Form 4 there in the last year
Anshul MaheshwariChief Op & Financial Officer · Chief Op & Financial Officer at Si-Bone, filing Form 4 there in the last year
Jeffrey W. DunnDirector · Director at Si-Bone, filing Form 4 there in the last year