Harrison Robert Gardner

Chief Information Officer

1 company

Strong

Trades Analyzed

12M Win Rate

86.7%

Avg 3M Return

+13.7%

Avg 12M Return

+32.6%

Harrison Robert Gardner is a Chief Information Officer at Sera Prognostics, Inc.. Recent SEC Form 4 filings include 0 buys and 10 sells.

Estimated insider holdings value: $147K based on current market prices.

Holdings by Company

SERAMar 11, 2026

Current Shares76.7K

Value$146.5K

Net Activity-100,198

Bought: 0Sold: 100.2K

Showing 10 filings

Date	Ticker	Role	Type	Shares	Price	Value	Chg%	3M	12M
Mar 11, 2026	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	716	$2.04	$1,460.64	-0.9%	+10.4%	-
Dec 30, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	2,000	$3.00	$6,000.00	-2.3%	-33.8%	-
Dec 10, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	616	$3.31	$2,038.96	-0.7%	-46.8%	-
Dec 2, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	2,000	$2.93	$5,860.00	-2.2%	-23.1%	-
Nov 10, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	6,528	$2.62	$17,103.36	-6.8%	+5.1%	-
Nov 4, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	2,000	$3.07	$6,140.00	-2.0%	-7.9%	-
Oct 7, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	2,000	$3.18	$6,360.00	-2.0%	-5.8%	-
Sep 11, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	645	$3.13	$2,018.85	-0.6%	+10.7%	-
Sep 9, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	2,000	$3.05	$6,100.00	-1.9%	-1.6%	-
Aug 20, 2025	SERA Sera Prognostics, Inc.	Chief Information Officer	Sell	6,000	$2.22	$13,320.00	-5.5%	+38.7%	-