Fluence Energy, Inc.
MX ˙ BMV ˙ US34379V1035
SecurityMX:FLNC / Fluence Energy, Inc.
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership463,599 shares
Latest Disclosed Value $ 6,379,122
Citadel Advisors Llc ownership in FLNC / Fluence Energy, Inc.

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 463,599 shares of Fluence Energy, Inc. (MX:FLNC) valued at $6,379,122 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,083,096 shares of Fluence Energy, Inc.. This represents a change in shares of -57.20% during the quarter.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (FLNC) in the form of stock options. The firm currently holds call options representing 687,200 of underlying shares valued at $9,455,872 USD and put options representing 356,000 of underlying shares valued at $4,898,560 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:FLNC / Fluence Energy, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F FLUENCE ENERGY COM CL A 34379V103 463,599 -619,497 -57.20 6,379 -70.22 0.0010
2026-02-17 2025-12-31 13F FLUENCE ENERGY COM CL A 34379V103 1,083,096 562,071 107.88 21,424 280.72 0.0032
2025-11-14 2025-09-30 13F FLUENCE ENERGY COM CL A 34379V103 521,025 -933,996 -64.19 5,627 -42.36 0.0009
2025-08-14 2025-06-30 13F FLUENCE ENERGY COM CL A 34379V103 1,455,021 845,999 138.91 9,763 230.61 0.0017
2025-05-15 2025-03-31 13F FLUENCE ENERGY COM CL A 34379V103 609,022 -64,896 -9.63 2,954 -72.40 0.0006
2025-02-14 2024-12-31 13F FLUENCE ENERGY COM CL A 34379V103 673,918 521,707 342.75 10,702 209.64 0.0019
2024-11-14 2024-09-30 13F FLUENCE ENERGY COM CL A 34379V103 152,211 -204,591 -57.34 3,457 -44.13 0.0007
2024-08-14 2024-06-30 13F FLUENCE ENERGY COM CL A 34379V103 356,802 -1,079,893 -75.17 6,187 -75.17 0.0013
2024-05-15 2024-03-31 13F FLUENCE ENERGY COM CL A 34379V103 1,436,695 -846,465 -37.07 24,912 -54.25 0.0048
2024-02-14 2023-12-31 13F FLUENCE ENERGY COM CL A 34379V103 2,283,160 1,995,141 692.71 54,453 722.43 0.0109
2023-11-14 2023-09-30 13F FLUENCE ENERGY COM CL A 34379V103 288,019 -193,182 -40.15 6,622 -48.35 0.0014
2023-08-14 2023-06-30 13F FLUENCE ENERGY COM CL A 34379V103 481,201 -426,391 -46.98 12,819 -30.25 0.0026
2023-05-15 2023-03-31 13F FLUENCE ENERGY COM CL A 34379V103 907,592 830,776 1,081.51 18,379 1,295.44 0.0040
2023-02-14 2022-12-31 13F FLUENCE ENERGY COM CL A 34379V103 76,816 39,062 103.46 1,317 139.02 0.0003
2022-11-14 2022-09-30 13F FLUENCE ENERGY COM CL A 34379V103 37,754 37,754 551 0.0001
2022-08-15 2022-06-30 13F FLUENCE ENERGY COM CL A 34379V103 0 -129,654 -100.00 0 -100.00
2022-05-16 2022-03-31 13F FLUENCE ENERGY COM CL A 34379V103 129,654 99,810 334.44 1,700 60.08 0.0004
2022-02-14 2021-12-31 13F FLUENCE ENERGY COM CL A 34379V103 29,844 29,844 1,062 0.0002
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F FLUENCE ENERGY COM CL A Call 687,200 -39.26 9,456 -57.75 n/a n/a n/a
2026-02-17 2025-12-31 13F FLUENCE ENERGY COM CL A Call 1,131,400 13.72 22,379 108.29 n/a n/a n/a
2025-11-14 2025-09-30 13F FLUENCE ENERGY COM CL A Call 994,900 167.30 10,745 330.28 n/a n/a n/a
2025-08-14 2025-06-30 13F FLUENCE ENERGY COM CL A Call 372,200 526.60 2,497 767.01 n/a n/a n/a
2025-05-15 2025-03-31 13F FLUENCE ENERGY COM CL A Call 59,400 -53.08 288 -85.67 n/a n/a n/a
2025-02-14 2024-12-31 13F FLUENCE ENERGY COM CL A Call 126,600 -45.12 2,010 -61.63 n/a n/a n/a
2024-11-14 2024-09-30 13F FLUENCE ENERGY COM CL A Call 230,700 95.01 5,239 155.44 n/a n/a n/a
2024-08-14 2024-06-30 13F FLUENCE ENERGY COM CL A Call 118,300 -65.34 2,051 -65.34 n/a n/a n/a
2024-05-15 2024-03-31 13F FLUENCE ENERGY COM CL A Call 341,300 30.97 5,918 -4.78 n/a n/a n/a
2024-02-14 2023-12-31 13F FLUENCE ENERGY COM CL A Call 260,600 74.66 6,215 81.20 n/a n/a n/a
2023-11-14 2023-09-30 13F FLUENCE ENERGY COM CL A Call 149,200 -17.20 3,430 -28.54 n/a n/a n/a
2023-08-14 2023-06-30 13F FLUENCE ENERGY COM CL A Call 180,200 35.29 4,801 77.98 n/a n/a n/a
2023-05-15 2023-03-31 13F FLUENCE ENERGY COM CL A Call 133,200 309.85 2,697 384.20 n/a n/a n/a
2023-02-14 2022-12-31 13F FLUENCE ENERGY COM CL A Call 32,500 -28.41 557 -15.86 n/a n/a n/a
2022-11-14 2022-09-30 13F FLUENCE ENERGY COM CL A Call 45,400 1.11 662 55.40 n/a n/a n/a
2022-08-15 2022-06-30 13F FLUENCE ENERGY COM CL A Call 44,900 17.23 426 -15.14 n/a n/a n/a
2022-05-16 2022-03-31 13F FLUENCE ENERGY COM CL A Call 38,300 502 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F FLUENCE ENERGY COM CL A Put 356,000 -39.98 4,899 -58.25 n/a n/a n/a
2026-02-17 2025-12-31 13F FLUENCE ENERGY COM CL A Put 593,100 125.00 11,732 312.19 n/a n/a n/a
2025-11-14 2025-09-30 13F FLUENCE ENERGY COM CL A Put 263,600 5.23 2,847 69.40 n/a n/a n/a
2025-08-14 2025-06-30 13F FLUENCE ENERGY COM CL A Put 250,500 -42.35 1,681 -20.27 n/a n/a n/a
2025-05-15 2025-03-31 13F FLUENCE ENERGY COM CL A Put 434,500 14.49 2,107 -65.03 n/a n/a n/a
2025-02-14 2024-12-31 13F FLUENCE ENERGY COM CL A Put 379,500 62.81 6,026 13.85 n/a n/a n/a
2024-11-14 2024-09-30 13F FLUENCE ENERGY COM CL A Put 233,100 -45.56 5,294 -28.70 n/a n/a n/a
2024-08-14 2024-06-30 13F FLUENCE ENERGY COM CL A Put 428,200 7.26 7,425 7.25 n/a n/a n/a
2024-05-15 2024-03-31 13F FLUENCE ENERGY COM CL A Put 399,200 36.53 6,922 -0.73 n/a n/a n/a
2024-02-14 2023-12-31 13F FLUENCE ENERGY COM CL A Put 292,400 32.97 6,974 37.94 n/a n/a n/a
2023-11-14 2023-09-30 13F FLUENCE ENERGY COM CL A Put 219,900 44.48 5,056 24.69 n/a n/a n/a
2023-08-14 2023-06-30 13F FLUENCE ENERGY COM CL A Put 152,200 -28.28 4,055 -5.66 n/a n/a n/a
2023-05-15 2023-03-31 13F FLUENCE ENERGY COM CL A Put 212,200 5.47 4,297 24.55 n/a n/a n/a
2023-02-14 2022-12-31 13F FLUENCE ENERGY COM CL A Put 201,200 36.50 3,451 60.39 n/a n/a n/a
2022-11-14 2022-09-30 13F FLUENCE ENERGY COM CL A Put 147,400 302.73 2,151 519.88 n/a n/a n/a
2022-08-15 2022-06-30 13F FLUENCE ENERGY COM CL A Put 36,600 111.56 347 52.86 n/a n/a n/a
2022-05-16 2022-03-31 13F FLUENCE ENERGY COM CL A Put 17,300 227 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.