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Who

Mary Beth Mandanas

Director

Company insider

Files Form 4 as: Director, Energy Vault Holdings; Director, TortoiseEcofin Acquisition Corp. III.

Every Form 4 they filed

In numbers

Trades disclosed
11
Buys
2
Sells
0
Bought
$57K
Sold
$0
Companies
2
Companies where not an officer
2
First trade
19 Jul 2021
Last trade
29 May 2026
Last filed
1 Jun 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
NRGV Energy Vault HoldingsDirector · Electronic Components & EMS · last 29 May 20262 buys · 0 sells
TortoiseEcofin Acquisition Corp. IIIDirector · last 16 Jul 20230 buys · 0 sells

Activity over time

1 Sep 2025 – 1 Oct 2026
01Sep 25Dec 25Apr 26Jul 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
29 May 2026filed 1 Jun 2026NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Code A—22,026 at $0.00filing
29 May 2026filed 1 Jun 2026NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Code A—22,026 at $0.00filing
25 Mar 2026filed 26 Mar 2026NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Bought$18K5,000 at $3.65filing
25 Mar 2026filed 26 Mar 2026NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Bought$18K5,000 at $3.65filing
16 Sep 2025filed 18 Sep 2025NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Code A—161,132 at $0.00filing
11 Sep 2025filed 12 Sep 2025NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Bought$21K10,000 at $2.05filing
24 May 2024filed 29 May 2024NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Code A—79,337 at $0.00filing
16 Jul 2023filed 18 Jul 2023TortoiseEcofin Acquisition Corp. IIIoption or derivativeSEC FORM 4 Code J—40,000 at $0.00filing
25 May 2023filed 30 May 2023NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Code A—48,853 at $0.00filing
16 Dec 2022filed 10 Feb 2023NRGV Energy Vault HoldingsElectronic Components & EMSSEC FORM 4 Code A—46,516 at $0.00filing
19 Jul 2021filed 21 Jul 2021TortoiseEcofin Acquisition Corp. IIIoption or derivativeSEC FORM 4 Code J—40,000 at $0.00filing

News

No headline names them, or the companies they trade most, lately.

Sectors

Technology2

Buys in green, sells in red, by the company’s sector.

Related people

Akshay LadwaChief Operations Officer · Chief Operations Officer at Energy Vault Holdings, filing Form 4 there in the last year
Robert PiconiChief Executive Officer · Chief Executive Officer at Energy Vault Holdings, filing Form 4 there in the last year
Stephanie UnwinDirector · Director at Energy Vault Holdings, filing Form 4 there in the last year
Dylan HixonDirector · Director at Energy Vault Holdings, filing Form 4 there in the last year
Nitin DahiyaChief Financial Officer · Chief Financial Officer at Energy Vault Holdings, filing Form 4 there in the last year