InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (9 ops.)
Insider track record
ExecutiveDisclosed buys
0
Disclosed sells
9
T+90 hit rate
100%
T+90 mean return
+65.5%
Across 2 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Browse the complete record of transactions filed by Stefan Constantin Ionel, Chief Technology Officer. Director active across 1 company, notably Amprius Technologies, Inc.. Cumulatively, 19 filings have been published. Split: 0 buy · 9 sells. Total volume traded: €893k. History available since 14 December 2022. The latest transaction was disclosed on 27 May 2026 (Cession). Regulator: SEC (Form 4). All data is free.
Declarations19 total
3,208 shares@ US$17.19350.0017% mcap5.2% of flowCommon stockSEC:0001940928-26-000020:0
28,812 shares@ US$14.78840.013% mcap40.1% of flowCommon stockSEC:0001940928-26-000016:0
90 shares@ US$0.620.4% of flowCommon stockSEC:0001940928-26-000004
90 shares@ US$0.620.0000% mcap0.4% of flowCommon stockSEC:0001940928-26-000004:0
125,000 shares@ US$0.050.0002% mcap49.6% of flowCommon stockSEC:0001940928-25-000020:0
125,000 shares@ US$0.0549.6% of flowCommon stockSEC:0001940928-25-000020
25,024 shares@ US$10.081323.9% of flowCommon stockSEC:0001940928-25-000018:0
20,366 shares@ US$2.4324.8% of flowCommon stockSEC:0001940928-25-000009:0
461,540 shares0Common stockSEC:0001940928-25-000004:0
3,471 shares@ US$0.980.3% of flowCommon stockSEC:0001940928-25-000003:0
9,066 shares@ US$3.13323.0% of flowCommon stockSEC:0001940928-25-000002:0
8,575 shares@ US$1.96461.7% of flowCommon stockSEC:0001940928-24-000009:0
8,800 shares@ US$1.040.9% of flowCommon stockSEC:0001628280-24-038250:0
5,272 shares@ US$1.32760.7% of flowCommon stockSEC:0001940928-24-000003:0
374,570 shares0Common stockSEC:0001628280-24-011987:0
46,370 shares@ US$3.655290.2% of flowCommon stockSEC:0001940928-23-000011:0
80,000 shares@ US$0.050.4% of flowCommon stockSEC:0001940928-23-000008:0
209 shares@ US$7.200.2% of flowCommon stockSEC:0001940928-23-000002:0
30,000 shares@ US$0.050.2% of flowCommon stockSEC:0001940928-22-000002:0
19 of 19 declarations
About Stefan Constantin Ionel
Stefan Constantin Ionel serves as Chief Technology Officer at Amprius Technologies, Inc. In this role, he is responsible for technical leadership and innovation within the company. His expertise in engineering and product development enables him to oversee technology projects and ensure product quality. Stefan plays a key role in the company's research and development strategy.
