LYTIR

Company · EOSE

Eos Energy Enterprises, Inc.

Nasdaq's symbol directory lists EOSE on Nasdaq as “Eos Energy Enterprises, Inc. - Common Stock”.

In the 12 months to Nov 8, 2026: insiders bought on 2 occasions ($59K); insiders sold on 12 occasions ($3.2M); 8 planned-sale notices; 4 filings by holders of 5% or more; 3 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $59K in total; Insider sales: $3.2M in total.Jun: Insider sales $414KJul: Insider sales $1.4MSep: Insider purchases $59KSep: Insider sales $1.3MOct: Insider sales $100KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $59KInsider sales below: $3.2M
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Joe Mastrangelo, Chief Executive Officer sold on 2 days 1 of them under a 10b5-1 plan latest Sep 16, 2026 sold $1.6M
  2. Kroeker Nathan, Chief Commercial Officer sold on 3 days all under a 10b5-1 plan latest Jul 28, 2026 sold $949K
  3. Puri Sumeet, Chief Accounting Officer sold on 4 days all under a 10b5-1 plan latest Sep 16, 2026 sold $462K
  4. Buczkowski Michelle, Chief Commercial Officer sold on 2 days all under a 10b5-1 plan latest Oct 29, 2026 sold $167K
  5. Silberman Michael W, Chief Legal Officer sold on 1 day all under a 10b5-1 plan latest Jun 30, 2026 sold $88K
  6. Haiyan Song bought on 2 days latest Sep 14, 2026 bought $59K
Every trade (14)
  1. SELLBuczkowski Michelle, Chief Commercial Officer sold Oct 29, 2026 50,000 shares 10b5-1 plan (scheduled) filing $100K
  2. SELLJoe Mastrangelo, Chief Executive Officer sold Sep 16, 2026 250,000 shares 10b5-1 plan (scheduled) filing $980K
  3. SELLPuri Sumeet, Chief Accounting Officer sold Sep 16, 2026 43,750 shares 10b5-1 plan (scheduled) filing $172K
  4. BUYHaiyan Song bought Sep 14, 2026 5,000 shares filing $19K
  5. BUYHaiyan Song bought Sep 11, 2026 10,000 shares filing $40K
  6. SELLPuri Sumeet, Chief Accounting Officer sold Sep 9, 2026 34,167 shares 10b5-1 plan (scheduled) filing $141K
  7. SELLKroeker Nathan, Chief Commercial Officer sold Jul 28, 2026 110,417 shares 10b5-1 plan (scheduled) filing $371K
  8. SELLPuri Sumeet, Chief Accounting Officer sold Jul 28, 2026 29,167 shares 10b5-1 plan (scheduled) filing $98K
  9. SELLJoe Mastrangelo, Chief Executive Officer sold Jul 27, 2026 159,154 shares filing $575K
  10. SELLKroeker Nathan, CCO and Interim CFO sold Jul 7, 2026 79,309 shares 10b5-1 plan (scheduled) filing $371K
  11. SELLKroeker Nathan, CCO and Interim CFO sold Jun 30, 2026 35,289 shares 10b5-1 plan (scheduled) filing $207K
  12. SELLSilberman Michael W, Chief Legal Officer sold Jun 30, 2026 14,998 shares 10b5-1 plan (scheduled) filing $88K
  13. SELLBuczkowski Michelle, Chief Administration Officer sold Jun 30, 2026 11,469 shares 10b5-1 plan (scheduled) filing $67K
  14. SELLPuri Sumeet, Chief Accounting Officer sold Jun 30, 2026 8,823 shares 10b5-1 plan (scheduled) filing $52K

Planned sales · SEC Form 144

Notice given

A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice

  1. Nathan Kroeker filed Oct 29, 2026 Former Officer 147,208 shares planned sale date 10/29/2026 filing $290K
  2. Buczkowski Michelle filed Oct 29, 2026 Officer 50,000 shares planned sale date 10/29/2026 filing $95K
  3. Michael Silberman filed Sep 22, 2026 Former Officer 114,650 shares planned sale date 09/22/2026 filing $467K
  4. Mastrangelo Joe filed Sep 16, 2026 Officer 250,000 shares planned sale date 09/16/2026 filing $1.0M
  5. Kroeker Nathan filed Sep 16, 2026 Former Officer 165,625 shares planned sale date 09/16/2026 filing $687K
  6. Silberman Michael W filed Sep 16, 2026 Former Officer 109,375 shares planned sale date 09/16/2026 filing $454K
  7. Puri Sumeet filed Sep 16, 2026 Officer 43,750 shares planned sale date 09/16/2026 filing $182K
  8. Puri Sumeet filed Sep 9, 2026 Officer 34,167 shares planned sale date 09/09/2026 filing $143K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. Hudson Bay Capital Management LP filed Nov 6, 2026 Schedule 13G passive filing 7.75%
  2. Cerberus Capital Management II, L.P. filed Aug 6, 2026 Schedule 13D/A may seek influence 175,829,986 shares filing 32.6%
  3. Cerberus Capital Management II, L.P. filed Jul 9, 2026 Schedule 13D/A may seek influence 159,587,654 shares filing 31.1%
  4. Cerberus Capital Management II, L.P. filed Jul 2, 2026 Schedule 13D/A may seek influence 159,587,654 shares filing 31.1%

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition; Costs associated with exit or disposal activities filing Nov 5, 2026
  2. Results of operations and financial condition; Regulation FD disclosure; Other events filing Oct 19, 2026
  3. Creation of a direct financial obligation; Regulation FD disclosure filing Sep 14, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.