SPDR Series Trust - State Street SPDR Bloomberg Investment Grade Floating Rate ETF
US ˙ ARCA ˙ US78468R2004

SecurityFLRN / SPDR Series Trust - State Street SPDR Bloomberg Investment Grade Floating Rate ETF
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership18,225 shares
Latest Disclosed Value $ 560,966
Citadel Advisors Llc ownership in FLRN / SPDR Series Trust - State Street SPDR Bloomberg Investment Grade Floating Rate ETF

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 18,225 shares of SPDR Series Trust - State Street SPDR Bloomberg Investment Grade Floating Rate ETF (US:FLRN) valued at $560,966 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of SPDR Series Trust - State Street SPDR Bloomberg Investment Grade Floating Rate ETF. The current value of the position is $560,601 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (FLRN) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 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.

FLRN / SPDR Series Trust - State Street SPDR Bloomberg Investment Grade Floating Rate ETF 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 SPDR SERIES TRUST STATE STREET SPD 78468R200 18,225 18,225 561 0.0001
2026-02-17 2025-12-31 13F SPDR SERIES TRUST BLOOMBERG INVT 78468R200 0 -18,478 -100.00 0 -100.00
2025-11-14 2025-09-30 13F SPDR SERIES TRUST BLOOMBERG INVT 78468R200 18,478 18,478 570 0.0001
2025-02-14 2024-12-31 13F SPDR SER TR BLOOMBERG INVT 78468R200 0 -74,616 -100.00 0 -100.00
2024-11-14 2024-09-30 13F SPDR SER TR BLOOMBERG INVT 78468R200 74,616 -822,460 -91.68 2,302 -91.69 0.0004
2024-08-14 2024-06-30 13F SPDR SER TR BLOOMBERG INVT 78468R200 897,076 786,025 707.81 27,675 708.47 0.0056
2024-05-15 2024-03-31 13F SPDR SER TR BLOOMBERG INVT 78468R200 111,051 111,051 3,424 0.0007
2024-02-14 2023-12-31 13F SPDR SER TR BLOOMBERG INVT 78468R200 0 -45,058 -100.00 0 -100.00
2023-11-14 2023-09-30 13F SPDR SER TR BLOOMBERG INVT 78468R200 45,058 10,191 29.23 1,384 29.35 0.0003
2023-08-14 2023-06-30 13F SPDR SER TR BLOOMBERG INVT 78468R200 34,867 -84,331 -70.75 1,070 -70.50 0.0002
2023-05-15 2023-03-31 13F SPDR SER TR BLOOMBERG INVT 78468R200 119,198 119,198 3,627 0.0008
2023-02-14 2022-12-31 13F SPDR SER TR BLOOMBERG INVT 78468R200 0 -92,899 -100.00 0 -100.00
2022-11-14 2022-09-30 13F SPDR SER TR BLOOMBERG INVT 78468R200 92,899 -161,005 -63.41 2,815 -63.18 0.0006
2022-08-15 2022-06-30 13F SPDR SER TR BLOOMBERG INVT 78468R200 253,904 187,701 283.52 7,645 278.65 0.0020
2022-05-16 2022-03-31 13F SPDR SER TR BLOOMBERG INVT 78468R200 66,203 66,203 2,019 0.0004
2022-02-14 2021-12-31 13F SPDR SER TR Cmn 78468R200 0 -280,824 -100.00 0 -100.00
2021-11-15 2021-09-30 13F SPDR SER TR Cmn 78468R200 280,824 115,494 69.86 8,610 69.92 0.0018
2021-08-16 2021-06-30 13F SPDR SER TR BLOMBERG BRC INV 78468R200 165,330 -461,766 -73.64 5,067 -73.63 0.0011
2021-05-21 2021-03-31 13F/A-1 SPDR SER TR BLOMBERG BRC INV 78468R200 627,096 -326,044 -34.21 19,214 -34.10 0.0047
2021-05-17 2021-03-31 13F SPDR SER TR BLOMBERG BRC INV 78468R200 627,096 -326,044 19,214 0.0047
2021-02-16 2020-12-31 13F SPDR SER TR BLOMBERG BRC INV 78468R200 953,140 895,506 1,553.78 29,157 1,554.77 0.0076
2020-11-16 2020-09-30 13F SPDR SER TR BLOMBERG BRC INV 78468R200 57,634 -1,380,984 -95.99 1,762 -95.98 0.0005
2020-08-14 2020-06-30 13F SPDR SER TR Cmn 78468R200 1,438,618 1,438,618 43,849 0.0156
2020-02-14 2019-12-31 13F SPDR SERIES TRUST Cmn 78468R200 0 -904,707 -100.00 0 -100.00
2019-11-14 2019-09-30 13F SPDR SERIES TRUST Cmn 78468R200 904,707 814,991 908.41 27,829 909.39 0.0131
2019-08-14 2019-06-30 13F SPDR SERIES TRUST Cmn 78468R200 89,716 -207,542 -69.82 2,757 -69.79 0.0013
2019-05-15 2019-03-31 13F SPDR SER TR Cmn 78468R200 297,258 128,264 75.90 9,126 77.83 0.0045
2019-02-14 2018-12-31 13F SPDR SER TR Cmn 78468R200 168,994 168,994 5,132 0.0028
2017-11-09 2017-09-30 13F SPDR SER TR Cmn 78468R200 0 -14,064 -100.00 0 -100.00
2017-08-11 2017-06-30 13F SPDR SER TR Cmn 78468R200 14,064 14,064 432 0.0004
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
(%)
2025-11-14 2025-09-30 13F SPDR SERIES TRUST BLOOMBERG INVT Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F SPDR SERIES TRUST BLOOMBERG INVT Call 39,700 65.42 1,224 65.49 n/a n/a n/a
2025-05-15 2025-03-31 13F SPDR SER TR BLOOMBERG INVT Call 24,000 -37.82 740 -37.69 n/a n/a n/a
2025-02-14 2024-12-31 13F SPDR SER TR BLOOMBERG INVT Call 38,600 2,657.14 1,186 2,658.14 n/a n/a n/a
2024-11-14 2024-09-30 13F SPDR SER TR BLOOMBERG INVT Call 1,400 0.00 43 0.00 n/a n/a n/a
2024-08-14 2024-06-30 13F SPDR SER TR BLOOMBERG INVT Call 1,400 600.00 43 616.67 n/a n/a n/a
2024-05-15 2024-03-31 13F SPDR SER TR BLOOMBERG INVT Call 200 -99.38 6 -99.39 n/a n/a n/a
2024-02-14 2023-12-31 13F SPDR SER TR BLOOMBERG INVT Call 32,100 16.73 982 16.23 n/a n/a n/a
2023-11-14 2023-09-30 13F SPDR SER TR BLOOMBERG INVT Call 27,500 64.67 845 64.84 n/a n/a n/a
2023-08-14 2023-06-30 13F SPDR SER TR BLOOMBERG INVT Call 16,700 421.88 513 427.84 n/a n/a n/a
2023-05-15 2023-03-31 13F SPDR SER TR BLOOMBERG INVT Call 3,200 97 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
(%)
2025-11-14 2025-09-30 13F SPDR SERIES TRUST BLOOMBERG INVT Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F SPDR SERIES TRUST BLOOMBERG INVT Put 10,200 -52.11 314 -52.13 n/a n/a n/a
2025-05-15 2025-03-31 13F SPDR SER TR BLOOMBERG INVT Put 21,300 -30.16 656 -29.99 n/a n/a n/a
2025-02-14 2024-12-31 13F SPDR SER TR BLOOMBERG INVT Put 30,500 15,150.00 937 15,516.67 n/a n/a n/a
2024-11-14 2024-09-30 13F SPDR SER TR BLOOMBERG INVT Put 200 -98.36 6 -98.40 n/a n/a n/a
2024-08-14 2024-06-30 13F SPDR SER TR BLOOMBERG INVT Put 12,200 376 n/a n/a n/a
2024-05-15 2024-03-31 13F SPDR SER TR BLOOMBERG INVT Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-14 2023-12-31 13F SPDR SER TR BLOOMBERG INVT Put 33,000 20.44 1,009 19.98 n/a n/a n/a
2023-11-14 2023-09-30 13F SPDR SER TR BLOOMBERG INVT Put 27,400 98.55 842 98.82 n/a n/a n/a
2023-08-14 2023-06-30 13F SPDR SER TR BLOOMBERG INVT Put 13,800 50.00 424 51.61 n/a n/a n/a
2023-05-15 2023-03-31 13F SPDR SER TR BLOOMBERG INVT Put 9,200 280 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.