Siemens affiliate sells 10M Fluence shares in secondary

Fluence Energy, Inc. disclosed that a major shareholder affiliated with Siemens completed a large secondary sale of its Class A common stock.

Rhea-AI Filing Summary

Fluence Energy, Inc. disclosed that a major shareholder affiliated with Siemens completed a large secondary sale of its Class A common stock. An entity directly holding shares, identified in the data as Siemens AG, sold 10,066,414 shares of Class A common stock in an open-market or private transaction at a sale price of $20.5275 per share in connection with a secondary offering. After this sale, that entity still directly holds 21,694,717 Class A shares. A related entity, SPT Holding Sarl, is reported as indirectly holding an additional 19,738,064 Class A shares, reflecting continued significant ownership by Siemens-affiliated holders.

Insights

Equity ownership analyst

Large Siemens‑affiliated holder sells 10M Fluence shares but retains a sizable stake.

Entities affiliated with Siemens, which are ten percent owners of Fluence Energy, reported a secondary sale of 10,066,414 Class A shares at $20.5275 per share. The filing describes this as part of a secondary offering, meaning the company is not the seller.

Following the transaction, the directly selling entity still holds 21,694,717 shares, and an affiliated entity indirectly holds 19,738,064 shares. This indicates that, despite the sizable sale, Siemens‑related holders remain large shareholders. Actual market impact depends on how investors interpret a major holder trimming, yet maintaining, a substantial position.

Insider Trade Summary

Net Seller: 10,066,414 shares

Net Sell 2 txns

Insider SPT Holding Sarl, SIEMENS PENSION TRUST E V, SIEMENS AG

Role 10% Owner | 10% Owner | 10% Owner

Sold 10,066,414 shs ($206.64M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	10,066,414	$20.5275	$206.64M
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 21,694,717 shares (Direct); Class A Common Stock — 19,738,064 shares (Indirect, See footnote)

Footnotes (3)

1. F1. This amount represents the $20.5275 sale price per share of Class A common stock, $0.00001 par value ("Class A Common Stock") of the Issuer in a secondary offering.
2. F2. These shares are directly owned by SPT Holding Sarl. SPT Holding Sarl is a wholly owned subsidiary of Siemens Pension-Trust e.V. Siemens AG is an affiliate of Siemens Pension-Trust e.V. and may be deemed to share beneficial ownership of the shares of Class A Common Stock beneficially owned by Siemens Pension-Trust e.V.
3. F3. These shares are directly owned by Siemens AG.

Key Figures

Shares sold: 10,066,414 shares Sale price per share: $20.5275 per share Direct holdings after sale: 21,694,717 shares +1 more

4 metrics

Shares sold 10,066,414 shares Class A Common Stock sold in secondary offering

Sale price per share $20.5275 per share Sale price for Class A Common Stock

Direct holdings after sale 21,694,717 shares Class A Common Stock directly held post-transaction

Indirect holdings reported 19,738,064 shares Class A Common Stock indirectly held via SPT Holding Sarl

Key Terms

secondary offering, beneficial ownership, ten percent owner, open-market sale

4 terms

secondary offering financial

"represents the $20.5275 sale price per share ... in a secondary offering"

A secondary offering is when a company sells new shares of its stock to the public after its initial sale. This allows existing shareholders or the company itself to raise additional money. For investors, it can impact the stock’s price by increasing the total number of shares available, which may influence the stock’s value and how the market perceives the company’s financial health.

beneficial ownership financial

"may be deemed to share beneficial ownership of the shares of Class A Common Stock"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

ten percent owner financial

"each identified as a ten percent owner of the issuer"

open-market sale financial

"transaction code description states sale in open market or private transaction"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Siemens-affiliated holders report in this Fluence Energy (FLNC) Form 4?

The filing shows a Siemens-affiliated entity sold 10,066,414 Fluence Class A shares at $20.5275 each in a secondary offering. Despite the sale, Siemens-related entities continue to hold substantial direct and indirect stakes in Fluence Energy.

How many Fluence Energy (FLNC) shares were sold and at what price?

A Siemens-affiliated direct holder sold 10,066,414 Class A shares of Fluence Energy at a sale price of $20.5275 per share. The transaction is described as occurring in connection with a secondary offering of the company’s stock.

How many Fluence Energy shares do Siemens-related entities still hold after this sale?

After the reported sale, the directly selling Siemens-affiliated entity holds 21,694,717 Class A shares. A related entity, SPT Holding Sarl, is reported as indirectly holding an additional 19,738,064 Class A shares, indicating continued large ownership positions.

Is the Fluence Energy (FLNC) transaction a primary or secondary offering?

The Form 4 footnote states the $20.5275 sale price reflects a sale in a secondary offering of Fluence Energy Class A common stock. This indicates existing shareholder stock was sold, not newly issued shares by the company itself.

Who are the reporting persons in the Fluence Energy (FLNC) Form 4?

The reporting persons are SPT Holding Sarl, Siemens Pension-Trust e.V., and Siemens AG, each identified as ten percent owners. Footnotes explain SPT Holding Sarl is owned by Siemens Pension-Trust e.V., and Siemens AG is an affiliate sharing beneficial ownership relationships.

What type of insider transaction was reported for Fluence Energy (FLNC)?

The key transaction is coded “S,” indicating an open-market or private sale of Fluence Class A common stock. It involves 10,066,414 shares sold at $20.5275 per share, tied to a secondary offering, by a Siemens-affiliated direct shareholder.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/15/2026 - 04:53 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SPT Holding Sarl

(Last) (First) (Middle)

21 RUE EDMOND REUTER

(Street)

CONTERN LUXEMBOURG 5326

(City) (State) (Zip)

LUXEMBOURG

(Country)

2. Issuer Name and Ticker or Trading Symbol
Fluence Energy, Inc. [ FLNC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	05/15/2026		S		10,066,414	D	$20.5275(1)	21,694,717	D(2)
Class A Common Stock								19,738,064	I	See footnote(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

SPT Holding Sarl

(Last) (First) (Middle)

21 RUE EDMOND REUTER

(Street)

CONTERN LUXEMBOURG 5326

(City) (State) (Zip)

LUXEMBOURG

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

SIEMENS PENSION TRUST E V

(Last) (First) (Middle)

WITTELSBACHER PLATZ 2

(Street)

MUNICH GERMANY 80333

(City) (State) (Zip)

GERMANY

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

SIEMENS AG

(Last) (First) (Middle)

WERNER-VON-SIEMENS-STRASSE 1

(Street)

MUNICH GERMANY 80333

(City) (State) (Zip)

GERMANY

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. This amount represents the $20.5275 sale price per share of Class A common stock, $0.00001 par value ("Class A Common Stock") of the Issuer in a secondary offering.

2. These shares are directly owned by SPT Holding Sarl. SPT Holding Sarl is a wholly owned subsidiary of Siemens Pension-Trust e.V. Siemens AG is an affiliate of Siemens Pension-Trust e.V. and may be deemed to share beneficial ownership of the shares of Class A Common Stock beneficially owned by Siemens Pension-Trust e.V.

3. These shares are directly owned by Siemens AG.

	SPT HOLDING SARL, By: /s/ Thomas Gruenewald, Name: Thomas Gruenewald, Title: CEO	05/15/2026
	By: /s/ Denis Stoffel, Name: Denis Stoffel, Title: CFO	05/15/2026
	SIEMENS PENSION-TRUST E.V., By: /s/ Nicole Spill, Name: Nicole Spill, Title: Authorized Signatory	05/15/2026
	By: /s/ Ramon Stoeckle, Name: Ramon Stoeckle, Title: Authorized Signatory	05/15/2026
	SIEMENS AG, By: /s/ Sabine Kalbitz, Name: Sabine Kalbitz, Title: Chief Counsel Mergers, Acquisitions and Corporate	05/15/2026
	By: /s/ Ingy Badie, Name: Ingy Badie, Title: SVP M&A	05/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)