Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Eos Energy Enterprises, Inc.

EOSE · Nasdaq · CIK 0001805077 · Industrials · Electrical Equipment & Parts

INSIDER SIGNAL

No active buy signal

2 qualifying P purchase groups
in the current 180-day scoring window

60 Form 4 transaction lines observed in the same window
14 sales · 44 option, withholding, award, gift or other lines

Last qualifying purchase2026-09-14 · Song Haiyan · $19.2K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying2 qualifying line group(s)
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Mastrangelo JoeChief Executive Officer
○○○○○○○○▼○▼
Puri SumeetChief Accounting Officer
○▼○▼○▼○▼
Kroeker NathanCCO and Interim CFO
○▼○○▼○○▼
Walters MarianDirector
○▼○▼○▼○○
Buczkowski MichelleChief Administration Officer
○▼○
Demby ClaudeDirector
○○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 8 additional owner(s) remain in Form 4 evidence.

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: Song Haiyan · $58.7K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-09-11–2026-09-14

Roles in the peak window: Director. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-09-14 · Song Haiyan.

Recent Form 4 activity

6Purchases
23Sales
61Other Form 4 lines
46SEC filings · 365 days
BUYING2 qualifying P line(s) · 180 days
SELLING14 sale line(s) · context only
OTHER44 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
134,847,658
Previous report
120,015,346
Avg daily volume
28,760,824
Days to cover
4.7

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-14Song HaiyanPurchase (P)Common Stock5,000USD 3.84USD 19,200SEC filing ↗
2026-09-11Song HaiyanPurchase (P)Common Stock10,000USD 3.95USD 39,500SEC filing ↗
2026-03-09Urban DavidPurchase (P)Common Stock16,250USD 6.16USD 100,100SEC filing ↗
2026-03-04Mastrangelo JoePurchase (P)Common Stock23,900USD 6.58USD 157,262SEC filing ↗
2026-03-02DIMITRIEF ALEXANDERPurchase (P)Common Stock15,000USD 6.04USD 90,600SEC filing ↗
2026-03-02Mastrangelo JoePurchase (P)Common Stock60,000USD 5.75USD 345,000SEC filing ↗
2024-08-16DIMITRIEF ALEXANDERPurchase (P)Common Stock2,000USD 1.91USD 3,820SEC filing ↗
2024-08-15DIMITRIEF ALEXANDERPurchase (P)Common Stock1,000USD 1.87USD 1,870SEC filing ↗
2024-08-13DIMITRIEF ALEXANDERPurchase (P)Common Stock2,000USD 1.68USD 3,360SEC filing ↗
2024-08-09Mastrangelo JoePurchase (P)Common Stock52,800USD 1.43USD 75,504SEC filing ↗
2024-03-08DIMITRIEF ALEXANDERPurchase (P)Common Stock5,000USD 1.13USD 5,650SEC filing ↗
2023-09-21Mastrangelo JoePurchase (P)Common Stock36,500USD 2.05USD 74,825SEC filing ↗
2023-07-28DIMITRIEF ALEXANDERPurchase (P)Common Stock5,000USD 2.13USD 10,650SEC filing ↗
2023-07-28Mastrangelo JoePurchase (P)Common Stock31,199USD 2.23USD 69,574SEC filing ↗
2023-07-28Kroeker NathanPurchase (P)Common Stock4,000USD 2.15USD 8,600SEC filing ↗

Form 4 evidence

90 transaction lines in the latest 365-day window; 308 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-16Puri SumeetSale (S)Common Stock43,750USD 3.92USD 171,500SEC filing ↗
2026-09-16Mastrangelo JoeSale (S)Common Stock250,000USD 3.92USD 980,000SEC filing ↗
2026-09-14Puri SumeetOption exercise / conversion (M)Common Stock87,500USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-16Puri SumeetSale (S)Common Stock43,750USD 3.92USD 171,500SEC filing ↗
2026-09-16Mastrangelo JoeSale (S)Common Stock250,000USD 3.92USD 980,000SEC filing ↗
2026-09-14Puri SumeetOption exercise / conversion (M)Common Stock87,500USD 0.00USD 0SEC filing ↗
2026-09-14Mastrangelo JoeAward / grant (A)Common Stock500,000USD 0.00USD 0SEC filing ↗
2026-09-14Song HaiyanPurchase (P)Common Stock5,000USD 3.84USD 19,200SEC filing ↗
2026-09-11Song HaiyanPurchase (P)Common Stock10,000USD 3.95USD 39,500SEC filing ↗
2026-09-09Puri SumeetSale (S)Common Stock34,167USD 4.13USD 141,110SEC filing ↗
2026-09-05Puri SumeetOption exercise / conversion (M)Common Stock68,333USD 0.00USD 0SEC filing ↗
2026-07-28Puri SumeetSale (S)Common Stock29,167USD 3.36USD 98,001SEC filing ↗
2026-07-28Kroeker NathanSale (S)Common Stock110,417USD 3.36USD 371,001SEC filing ↗
2026-07-27Mastrangelo JoeSale (S)Common Stock159,154USD 3.61USD 574,546SEC filing ↗
2026-07-25Puri SumeetOption exercise / conversion (M)Common Stock58,334USD 0.00USD 0SEC filing ↗
2026-07-25Mastrangelo JoeOption exercise / conversion (M)Common Stock333,334USD 0.00USD 0SEC filing ↗
2026-07-25Kroeker NathanOption exercise / conversion (M)Common Stock220,834USD 0.00USD 0SEC filing ↗
2026-07-21Walters MarianOption exercise / conversion (M)Common Stock11,407USD 5.48USD 62,510SEC filing ↗
2026-07-21Urban DavidOption exercise / conversion (M)Common Stock12,185USD 5.48USD 66,774SEC filing ↗
2026-07-21Nigro JosephOption exercise / conversion (M)Common Stock2,773USD 5.48USD 15,196SEC filing ↗
2026-07-21Mastrangelo JoeOption exercise / conversion (M)Common Stock111,118USD 5.48USD 608,927SEC filing ↗
2026-07-21Kroeker NathanOption exercise / conversion (M)Common Stock16,944USD 5.48USD 92,853SEC filing ↗
2026-07-21Demby ClaudeOption exercise / conversion (M)Common Stock1,825USD 5.48USD 10,001SEC filing ↗
2026-07-21DIMITRIEF ALEXANDEROption exercise / conversion (M)Common Stock19,274USD 5.48USD 105,622SEC filing ↗
2026-07-21Buczkowski MichelleOption exercise / conversion (M)Common Stock2,585USD 5.48USD 14,166SEC filing ↗
2026-07-21Bornstein Jeffrey SOption exercise / conversion (M)Common Stock9,558USD 5.48USD 52,378SEC filing ↗
2026-07-07Kroeker NathanSale (S)Common Stock79,309USD 4.68USD 371,166SEC filing ↗
2026-07-06Mastrangelo JoeTax withholding (F)Common Stock121,245USD 5.06USD 613,500SEC filing ↗
2026-07-05Mastrangelo JoeOption exercise / conversion (M)Common Stock254,304USD 0.00USD 0SEC filing ↗
2026-07-05Kroeker NathanOption exercise / conversion (M)Common Stock105,008USD 0.00USD 0SEC filing ↗
2026-07-03Kroeker NathanOption exercise / conversion (M)Common Stock53,610USD 0.00USD 0SEC filing ↗
2026-06-30Silberman Michael WSale (S)Common Stock14,998USD 5.87USD 88,038SEC filing ↗
2026-06-30Puri SumeetSale (S)Common Stock8,823USD 5.86USD 51,703SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerEOSE
CIK0001805077
SectorIndustrials
IndustryElectrical Equipment & Parts Yahoo Finance
SEC SIC3690 Miscellaneous Electrical Machinery, Equipment & Supplies
ExchangeNasdaq

Data coverage

Local Form 4 history308 transaction lines from 2020-05-20 to 2026-09-16
56 P purchase lines · 77 S sale lines · 175 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.