Harrison Robert Gardner

Track

Insider profile

Performance

Overall performance
3.3
Performance over holding periods
3.3
30 days 90 days 120 days
Average return -3% 8.2% 15.1%
Success rate 45% 68% 82%
Transactions
14 0% Buy
34 71% Buy
47 69% Buy
Ranking by holding-period performance
Harrison Robert Gardner's trades of Sera Prognostics Inc's stock


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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date Company B/S Transaction type Nb. shares
Price
Value 		Number of shares Price Value Details
2026-04-21 2026-04-21
PrS Proposed sale
53,124
494.47
US$2,682,416 		53,124 494.47 US$2,682,416
2026-03-24 2026-03-24
PrS Proposed sale
26,599
69.21
US$2,451,409 		26,599 69.21 US$2,451,409
2026-03-12 2026-03-11
S Sale
73,487 +33.8%
13.63
US$3,856,675 		73,487 +33.8% 13.63 US$3,856,675
2026-03-12 2026-03-11
PrS Proposed sale
716
2.04
US$1,462 		716 2.04 US$1,462
2026-03-10 2026-03-09
PrS Proposed sale
3,360
1.96
US$6,596 		3,360 1.96 US$6,596
2026-03-10 2026-03-09
S Sale
3,360 -4.2%
1.96
US$6,586 		3,360 -4.2% 1.96 US$6,586
2026-02-24 2026-02-24
PlS Planned sale
2,000 -2.4%
2.34
US$4,680 		2,000 -2.4% 2.34 US$4,680
2026-02-24 2026-02-24
PrS Proposed sale
2,000
2.45
US$4,900 		2,000 2.45 US$4,900
2026-01-27 2026-01-27
PrS Proposed sale
2,000
3.09
US$6,180 		2,000 3.09 US$6,180
2026-01-27 2026-01-27
PlS Planned sale
2,000 -2.4%
2.97
US$5,940 		2,000 -2.4% 2.97 US$5,940
2025-12-30 2025-12-30
PrS Proposed sale
2,000
3.27
US$6,540 		2,000 3.27 US$6,540
2025-12-30 2025-12-30
PlS Planned sale
2,000 -2.3%
3.00
US$6,000 		2,000 -2.3% 3.00 US$6,000
2025-12-11 2025-12-10
PrS Proposed sale
616
3.31
US$2,037 		616 3.31 US$2,037
2025-12-11 2025-12-10
S Sale
616 -0.7%
3.31
US$2,039 		616 -0.7% 3.31 US$2,039
2025-12-03 2025-12-02
PlS Planned sale
2,000 -2.2%
2.93
US$5,860 		2,000 -2.2% 2.93 US$5,860
2025-12-02 2025-12-02
PrS Proposed sale
2,000
3.21
US$6,420 		2,000 3.21 US$6,420
2025-11-12 2025-11-10
PrS Proposed sale
6,528
2.62
US$17,121 		6,528 2.62 US$17,121
2025-11-12 2025-11-10
S Sale
6,528 -6.8%
2.62
US$17,103 		6,528 -6.8% 2.62 US$17,103
2025-11-04 2025-11-04
PrS Proposed sale
2,000
3.20
US$6,400 		2,000 3.20 US$6,400
2025-11-04 2025-11-04
PlS Planned sale
2,000 -2.0%
3.07
US$6,140 		2,000 -2.0% 3.07 US$6,140
2025-10-08 2025-10-07
PlS Planned sale
2,000 -2.0%
3.18
US$6,360 		2,000 -2.0% 3.18 US$6,360
2025-10-07 2025-10-07
PrS Proposed sale
2,000
3.26
US$6,520 		2,000 3.26 US$6,520
2025-09-12 2025-09-11
PrS Proposed sale
645
3.13
US$2,018 		645 3.13 US$2,018
2025-09-12 2025-09-11
S Sale
645 -0.6%
3.13
US$2,019 		645 -0.6% 3.13 US$2,019
2025-09-09 2025-09-09
PrS Proposed sale
2,000
3.17
US$6,340 		2,000 3.17 US$6,340
2025-09-09 2025-09-09
PlS Planned sale
2,000 -1.9%
3.05
US$6,100 		2,000 -1.9% 3.05 US$6,100
2025-08-20 2025-08-20
PrS Proposed sale
6,000
2.25
US$13,500 		6,000 2.25 US$13,500
2025-08-20 2025-08-20
PlS Planned sale
6,000 -5.5%
2.22
US$13,320 		6,000 -5.5% 2.22 US$13,320
2025-08-11 2025-08-08
PrS Proposed sale
5,962
2.54
US$15,145 		5,962 2.54 US$15,145
2025-08-11 2025-08-08
S Sale
5,962 -5.2%
2.54
US$15,143 		5,962 -5.2% 2.54 US$15,143
2025-06-11 2025-06-10
PrS Proposed sale
667
1.48
US$990 		667 1.48 US$990
2025-06-11 2025-06-10
S Sale
667 -0.6%
1.48
US$987 		667 -0.6% 1.48 US$987
2025-05-09 2025-05-08
PrS Proposed sale
6,551
2.44
US$16,001 		6,551 2.44 US$16,001
2025-05-09 2025-05-08
S Sale
6,551 -5.4%
2.44
US$15,984 		6,551 -5.4% 2.44 US$15,984
2025-03-10 2025-03-07
PlS Planned sale
3,874 -3.1%
4.16
US$16,116 		3,874 -3.1% 4.16 US$16,116
2025-03-07 2025-03-07
PrS Proposed sale
3,874
4.15
US$16,077 		3,874 4.15 US$16,077
2025-03-07 2025-03-06
PrS Proposed sale
3,251
4.16
US$13,537 		3,251 4.16 US$13,537
2025-03-07 2025-03-06
S Sale
3,251 -2.5%
4.16
US$13,524 		3,251 -2.5% 4.16 US$13,524
2025-02-14 2025-02-13
PlS Planned sale
3,610 -3.4%
4.28
US$15,451 		3,610 -3.4% 4.28 US$15,451
2025-02-13 2025-02-13
PrS Proposed sale
3,610
4.29
US$15,487 		3,610 4.29 US$15,487
2025-02-14 2025-02-12
PrS Proposed sale
7,297
4.58
US$33,390 		7,297 4.58 US$33,390
2025-02-14 2025-02-12
S Sale
7,297 -6.4%
4.58
US$33,420 		7,297 -6.4% 4.58 US$33,420
2025-02-13 2025-02-11
PlS Planned sale
554 -0.5%
3.97
US$2,199 		554 -0.5% 3.97 US$2,199
2025-02-11 2025-02-11
PrS Proposed sale
554
4.45
US$2,465 		554 4.45 US$2,465
2025-01-14 2025-01-13
PlS Planned sale
2,264 -1.9%
6.47
US$14,648 		2,264 -1.9% 6.47 US$14,648