Harrison Robert Gardner
Chief Information Officer
Harrison Robert Gardner has filed 12 SEC Form 4 filings (12 transaction rows) across 1 company, with disclosures dating back to 2025. 9 of those filings fall inside the rolling window. Most recent filing: Mar 12, 2026.
On the most recent filing, Harrison Robert Gardner is listed as Chief Information Officer at SERA PROGNOSTICS, INC. Inside the rolling window, Harrison Robert Gardner reported no open-market purchases and 9 open-market sales totaling $56K in SERA. The largest disclosed transaction in the window is a sale of 6,528 SERA shares on Nov 10, 2025, worth $17K.
Companies traded
Other insiders at SERA
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$56K
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| SERA | Chief Information Officer | Sale | 716 | $1K | Mar 12 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 3,360 | $7K | Mar 10 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 2,000 | $5K | Feb 24 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 2,000 | $6K | Jan 27 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 2,000 | $6K | Dec 30 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 616 | $2K | Dec 11 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 2,000 | $6K | Dec 3 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 6,528 | $17K | Nov 12 | SEC ↗ | |
| SERA | Chief Information Officer | Sale | 2,000 | $6K | Nov 4 | SEC ↗ |
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
Frequently asked questions
How many SEC Form 4 filings has Harrison Robert Gardner made?
Harrison Robert Gardner has filed 12 SEC Form 4 filings (12 transaction rows) across 1 company since 2025.
Which companies does Harrison Robert Gardner trade?
Harrison Robert Gardner has filed SEC Form 4 disclosures for 1 company, including SERA.
When was Harrison Robert Gardner's most recent SEC Form 4 filing?
Harrison Robert Gardner's most recent SEC Form 4 filing on Tracefour is dated Mar 12, 2026.
What is Harrison Robert Gardner's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Harrison Robert Gardner is listed as Chief Information Officer.
What is Harrison Robert Gardner's total buy and sell value in the current window?
Inside the rolling retention window, Harrison Robert Gardner bought $0 and sold $56K based on SEC Form 4 filings.
What was Harrison Robert Gardner's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 6,528 SERA shares on 2025-11-10, worth $17K, per SEC Form 4 filings.