Insider trading

Period: 120 months Stock: PRME Role: 10% owners × + Add filter Clear all
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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

41 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

41 decisions over 120 months Remove this filter
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

41 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

41 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
41 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
41 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

41 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
1 Aug 2025
ARCH Venture Partners X, LLC 10% owner · indirect
Bought
$10.00M 3,030,300 at 3.30
94.7%
+95% of stake
1 Aug 2025
ARCH Venture Partners XII, LLC 10% owner · indirect
Bought
$10.00M 3,030,300 at 3.30
94.7%
+95% of stake
1 Aug 2025
GV 2021 GP, L.L.C. 10% owner · indirect
Bought
$4.95M 1,500,000 at 3.30
85.1%
First buy on file
30 Jun 2025
Liu David R. 10% owner
Bought on a plan
$52.83K 21,000 at 2.52
0.1%
Bought on a plan
23 Jun 2025
Liu David R. 10% owner
Bought on a plan
$45.40K 21,000 at 2.16
0.1%
Bought on a plan
16 Jun 2025
Liu David R. 10% owner
Bought on a plan
$31.20K 21,000 at 1.49
0.1%
Bought on a plan
11 Jun 2025
Liu David R. 10% owner
Bought on a plan
$33.59K 21,000 at 1.60
0.1%
Bought on a plan
15 Feb 2024
ARCH Venture Partners X, LLC 10% owner · indirect
Bought
$20.00M 3,200,000 at 6.25
opened
Largest buy in 3 yrs
15 Feb 2024
ARCH Venture Partners XII, LLC 10% owner · indirect
Bought
$20.00M 3,200,000 at 6.25
opened
First buy on file
21 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$284.50K 19,003 at 14.97
100%
Sold half or more
20 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$563.25K 37,405 at 15.06
100%
Sold half or more
16 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$98.11K 6,532 at 15.02
100%
Sold half or more
15 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$994.33K 66,659 at 14.92
100%
Sold half or more
14 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$430.68K 28,960 at 14.87
100%
Sold half or more
13 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$425.10K 28,100 at 15.13
100%
Sold half or more
12 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$240.15K 16,031 at 14.98
100%
Sold half or more
9 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$226.98K 15,672 at 14.48
100%
Sold half or more
8 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$78.69K 5,000 at 15.74
100%
Sold half or more
7 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$253.87K 15,000 at 16.92
100%
Sold half or more
6 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$510.17K 29,975 at 17.02
100%
Sold half or more
5 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$374.61K 22,434 at 16.70
100%
Sold half or more
1 Jun 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan 2×
$649.19K 45,223 at 14.36
100%
Sold half or more
31 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$227.00K 16,633 at 13.65
100%
Sold half or more
30 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$230.24K 16,805 at 13.70
100%
Sold half or more
26 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$172.60K 12,602 at 13.70
100%
Sold half or more
25 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$309.97K 23,161 at 13.38
100%
Sold half or more
24 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$107.92K 7,900 at 13.66
100%
Sold half or more
23 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$647.65K 43,939 at 14.74
100%
Sold half or more
22 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$1.24M 87,922 at 14.13
100%
Sold half or more
19 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$877.07K 63,212 at 13.88
100%
Sold half or more
18 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan 2×
$353.27K 27,098 at 13.04
100%
Sold half or more
17 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$191.60K 15,000 at 12.77
0.1%
Planned (10b5-1)
16 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$637.68K 50,649 at 12.59
0.5%
Planned (10b5-1)
15 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$2.01M 157,952 at 12.74
1.4%
Planned (10b5-1)
12 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$347.22K 27,290 at 12.72
0.2%
Planned (10b5-1)
11 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan 2×
$349.53K 26,626 at 13.13
0.2%
Planned (10b5-1)
10 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$1.23M 87,397 at 14.03
0.8%
Planned (10b5-1)
9 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$4.52M 321,238 at 14.08
2.8%
Planned (10b5-1)
8 May 2023
GV 2019 GP, L.L.C. 10% owner · indirect
Sold on a plan
$1.42M 100,772 at 14.13
0.9%
Planned (10b5-1)
24 Oct 2022
GV 2019 GP, L.L.C. 10% owner · indirect
Bought
$13.60M 800,000 at 17.00
7.5%
First buy on file
24 Oct 2022
ARCH Venture Partners X, LLC 10% owner · indirect
Bought 2×
$13.60M 800,000 at 17.00
15.0%
First buy on file
Showing 1–41 of 41.