InsidersTradesSigma
Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (1 ops.)
Insider track record
Board DirectorDisclosed buys
0
Disclosed sells
1
T+90 hit rate
50%
T+90 mean return
-3.4%
Across 8 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Explore the full record of transactions filed by Nishimura Mika, Director. Insider active across 2 companies, notably ACCURAY INC. Cumulatively, 11 reports have been published. Split: 0 buy · 1 sell. Total volume traded: €37k. Activity tracked since 31 August 2021. The latest transaction was filed on 21 November 2025 (Levée d'options). Regulator: SEC (Form 4). All data is openly available.
Declarations11 total
56,603 shares0Common StockSEC:0001214659-25-017245:0
8,791 shares0Common StockSEC:0001562180-24-005331:0
2,500 shares@ US$16.22100.0% of flowCommon StockSEC:0001562180-24-002690:0
56,603 shares0Common StockSEC:0001214659-23-016012:0
4,866 shares0Common StockSEC:0001562180-23-005113:0
59,055 shares0Common StockSEC:0001214659-22-014664:0
8,324 shares0Common StockSEC:0001562180-22-005237:0
31,185 shares@ US$4.8140.4% of flowCommon StockSEC:0001214659-21-012597
31,185 shares@ US$4.810.41% mcap40.4% of flowCommon StockSEC:0001214659-21-012597:0
9,213 shares@ US$4.070.099% mcap9.6% of flowCommon StockSEC:0001214659-21-009288:0
9,213 shares@ US$4.079.6% of flowCommon StockSEC:0001214659-21-009288
11 of 11 declarations
About Nishimura Mika
Mika Nishimura is a Director at ACCURAY INC and SI-BONE, Inc. In this role, she contributes to the company's strategy and oversight of operations. Her expertise in the medical sector is essential for the development of ACCURAY and SI-BONE.
