Insider trading

Period: 120 months Stock: ACM Role: Other officers × + 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.

32 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.

32 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.

32 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.

32 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.
32 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
32 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.

32 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
16 Jun 2026
Poloni Lara PRESIDENT
Bought
$298.34K 4,224 at 70.63
2.8%
First buy on file
17 Dec 2025
Poloni Lara PRESIDENT
Sold on a plan 2×
$1.70M 17,533 at 97.02
10.5%
Planned (10b5-1)
17 Dec 2025
Gan David Y. CHIEF LEGAL OFFICER
Sold on a plan
$921.79K 9,502 at 97.01
18.6%
Planned (10b5-1)
15 Dec 2025
Gan David Y. CHIEF LEGAL OFFICER
Sold on a plan
$593.10K 6,000 at 98.85
10.5%
Planned (10b5-1)
18 Dec 2024
Gan David Y. CHIEF LEGAL OFFICER
Sold on a plan
$337.00K 3,036 at 111.00
6.9%
Planned (10b5-1)
17 Dec 2024
Gan David Y. CHIEF LEGAL OFFICER
Sold on a plan
$701.03K 6,362 at 110.19
12.6%
Planned (10b5-1)
16 Dec 2024
Gan David Y. CHIEF LEGAL OFFICER
Sold on a plan 2×
$1.28M 11,500 at 111.46
18.6%
Planned (10b5-1)
14 Dec 2023
Poloni Lara PRESIDENT
Sold at will
$2.84M 30,692 at 92.50
36.3%
Not planned
9 Jan 2023
Poloni Lara PRESIDENT
Sold, plan not stated 3×
$539.99K 6,498 at 83.10
8.1%
5 Jan 2023
Battley Todd CHIEF STRATEGY OFFICER
Sold, plan not stated
$235.09K 2,800 at 83.96
14.7%
20 Aug 2020
Chiao Chuan-Sheng President, Asia Pacific
Sold, plan not stated
$832.88K 21,594 at 38.57
36.1%
27 Dec 2019
Vollmer John C. Group President, MS
Sold, plan not stated
$1.31M 30,240 at 43.28
72.6%
Sold half or more
15 Nov 2019
Morriss Steve Group President, Design and Co
Sold, plan not stated
$1.21M 28,160 at 43.12
100%
Sold half or more
12 Apr 2019
Christofferson Carla J EVP, Chief Legal Officer
Sold, plan not stated
$268.90K 8,403 at 32.00
92.8%
Sold half or more
18 Dec 2018
Christofferson Carla J EVP, Chief Legal Officer
Sold, plan not stated
$435.11K 15,756 at 27.62
63.1%
Sold half or more
6 Jul 2018
Christofferson Carla J EVP, Chief Legal Officer
Sold, plan not stated
$33.00K 1,000 at 33.00
54.9%
Sold half or more
4 Jun 2018
Chiao Chuan-Sheng President, Asia Pacific
Sold, plan not stated
$601.20K 18,000 at 33.40
45.2%
1 Jun 2018
Chiao Chuan-Sheng President, Asia Pacific
Sold, plan not stated
$56.63K 1,700 at 33.31
4.1%
13 Mar 2018
McQuade Daniel P President, Construction Srvcs.
Sold, plan not stated
$478.60K 12,935 at 37.00
83.0%
Sold half or more
27 Feb 2018
Tishman Daniel R. Vice Chairman
Sold, plan not stated
$555.00K 15,000 at 37.00
11.6%
16 Jan 2018
Tishman Daniel R. Vice Chairman
Sold, plan not stated
$583.20K 15,000 at 38.88
10.4%
15 Dec 2017
Tishman Daniel R. Vice Chairman
Bought
$573.90K 15,000 at 38.26
11.6%
First buy on file
24 Mar 2017
Christofferson Carla J EVP, General Counsel
Sold, plan not stated
$332.13K 9,599 at 34.60
85.0%
Sold half or more
4 Jan 2017
Werner Frederick W Pres, Design & Conslt Services
Sold, plan not stated
$569.09K 14,976 at 38.00
23.0%
3 Jan 2017
Werner Frederick W Pres, Design & Conslt Services
Sold, plan not stated
$1.10M 29,952 at 36.72
31.5%
19 Dec 2016
McQuade Daniel P President, Blding Construction
Sold, plan not stated
$172.75K 4,546 at 38.00
28.7%
16 Dec 2016
Kadenacy Stephen M President
Sold, plan not stated
$1.51M 39,632 at 38.16
41.2%
8 Dec 2016
Werner Frederick W Pres, Design & Conslt Services
Sold, plan not stated
$120.00K 3,000 at 40.00
7.9%
7 Dec 2016
Tishman Daniel R. Vice Chairman
Sold, plan not stated
$1.17M 30,000 at 39.00
17.7%
6 Dec 2016
Werner Frederick W Pres, Design & Conslt Services
Sold, plan not stated
$114.00K 3,000 at 38.00
7.9%
14 Nov 2016
Tishman Daniel R. Vice Chairman
Sold, plan not stated 2×
$2.16M 60,000 at 36.00
26.2%
14 Nov 2016
Werner Frederick W Pres, Design & Conslt Services
Sold, plan not stated
$111.00K 3,000 at 37.00
7.9%
Showing 1–32 of 32.