SPDR Series Trust - State Street Blackstone Senior Loan ETF
US ˙ ARCA ˙ US78467V6083

SecuritySRLN / SPDR Series Trust - State Street Blackstone Senior Loan ETF
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership18,152 shares
Latest Disclosed Value $ 749,155
Parallel Advisors, LLC ownership in SRLN / SPDR Series Trust - State Street Blackstone Senior Loan ETF

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 18,152 shares of SPDR Series Trust - State Street Blackstone Senior Loan ETF (US:SRLN) valued at $749,133 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 6,809 shares of SPDR Series Trust - State Street Blackstone Senior Loan ETF. This represents a change in shares of 166.59% during the quarter. The current value of the position is $732,433 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (SRLN) in the form of stock options. The firm currently holds call 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.

SRLN / SPDR Series Trust - State Street Blackstone Senior Loan 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)
2026-02-11 2025-12-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 18,152 11,343 166.59 749 164.66 0.0137
2025-11-13 2025-09-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 6,809 -528 -7.20 283 -7.21 0.0052
2025-07-08 2025-06-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 7,337 -4 -0.05 305 1.33 0.0061
2025-04-08 2025-03-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 7,341 -878 -10.68 302 -11.99 0.0068
2025-02-10 2024-12-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 8,219 -1,236 -13.07 343 -13.20 0.0077
2024-11-13 2024-09-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 9,455 -1,811 -16.07 395 -16.17 0.0093
2024-08-08 2024-06-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 11,266 -554 -4.69 471 -5.43 0.0121
2024-05-06 2024-03-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 11,820 -113 -0.95 498 -0.60 0.0135
2024-02-12 2023-12-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 11,933 -7,619 -38.97 500 -38.95 0.0148
2024-05-20 2023-09-30 13F/A-1 SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 19,552 -1,846 -8.63 820 -8.49 0.0273
2023-11-14 2023-09-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 19,552 -1,846 820 0.0273
2024-05-20 2023-06-30 13F/A-1 SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 21,398 -11,594 -35.14 896 -34.53 0.0288
2023-08-04 2023-06-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 21,398 -11,594 896 0.0288
2024-05-20 2023-03-31 13F/A-1 SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 32,992 -48,421 -59.48 1,368 -58.94 0.0461
2023-04-25 2023-03-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 32,992 -48,421 1,368 0.0461
2023-02-06 2022-12-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 81,413 -109,603 -57.38 3,330 -57.36 0.1444
2022-11-10 2022-09-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 191,016 -512,252 -72.84 7,807 -73.34 0.3594
2022-08-01 2022-06-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 703,268 -20,952 -2.89 29,284 -10.10 1.3440
2022-04-28 2022-03-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 724,220 -16,630 -2.24 32,575 -3.64 1.2925
2022-01-20 2021-12-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 740,850 127,932 20.87 33,805 19.85 1.2550
2021-11-02 2021-09-30 13F/A-1 SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 612,918 153,850 33.51 28,206 32.73 1.1374
2021-08-06 2021-06-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 459,068 219,919 91.96 21,250 94.26 0.9000
2021-04-23 2021-03-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 239,149 239,149 10,939 0.5161
2019-11-01 2019-09-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 0 -330 -100.00 0 -100.00
2019-08-05 2019-06-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF 78467V608 330 330 15 0.0015
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
(%)
2022-01-19 2021-12-31 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F SSGA ACTIVE ETF TR BLKSTN GSOSRLN ETF Call 459,068 21,250 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.