SPDR Series Trust - State Street SPDR Bloomberg Convertible Securities ETF
US ˙ ARCA ˙ US78464A3591

SecurityCWB / SPDR Series Trust - State Street SPDR Bloomberg Convertible Securities ETF
InstitutionMount Lucas Management LP
Latest Disclosed Ownership34,764 shares
Latest Disclosed Value $ 3,181,601
Mount Lucas Management LP reports 5.87% increase in ownership of CWB / SPDR Series Trust - State Street SPDR Bloomberg Convertible Securities ETF

On May 5, 2026 - Mount Lucas Management LP filed a 13F-HR form disclosing ownership of 34,764 shares of SPDR Series Trust - State Street SPDR Bloomberg Convertible Securities ETF (US:CWB) valued at $3,181,601 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 32,838 shares of SPDR Series Trust - State Street SPDR Bloomberg Convertible Securities ETF. This represents a change in shares of 5.87% during the quarter. The current value of the position is $3,658,216 USD.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-05 2026-03-31 13F SS SPDR BB CONV SEC ETF ETP 78464A359 34,764 1,926 5.87 3,182 8.60 1.1650
2026-02-05 2025-12-31 13F SS SPDR BB CONV SEC ETF ETP 78464A359 32,838 -246 -0.74 2,929 -2.17 1.1715
2025-11-10 2025-09-30 13F SS SPDR BB CONV SEC ETF ETP 78464A359 33,084 -691 -2.05 2,994 7.27 1.2298
2025-08-11 2025-06-30 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 33,775 -754 -2.18 2,792 5.52 1.1902
2025-05-06 2025-03-31 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 34,529 627 1.85 2,646 0.19 0.8508
2025-02-07 2024-12-31 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 33,902 -2,044 -5.69 2,641 -4.10 0.9193
2024-11-06 2024-09-30 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 35,946 1,046 3.00 2,753 9.51 0.9377
2024-08-06 2024-06-30 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 34,900 -1,459 -4.01 2,515 -5.31 0.7199
2024-05-10 2024-03-31 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 36,359 364 1.01 2,656 2.23 0.7256
2024-02-07 2023-12-31 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 35,995 -1,181 -3.18 2,597 3.06 0.7471
2023-11-14 2023-09-30 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 37,176 216 0.58 2,521 -2.51 0.8902
2023-08-14 2023-06-30 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 36,960 36,960 2,585 0.8645
2022-02-14 2021-12-31 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 0 -64,518 -100.00 0 -100.00
2021-11-15 2021-09-30 13F SPDR BLOOMBERG CONVERTIBLE S ETP 78464A359 64,518 -6,434 -9.07 5,507 -10.51 1.6638
2021-08-16 2021-06-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 70,952 5,240 7.97 6,154 12.36 1.6363
2021-05-17 2021-03-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 65,712 -7,393 -10.11 5,477 -9.50 1.6124
2021-02-16 2020-12-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 73,105 1,575 2.20 6,052 22.81 1.2734
2020-11-16 2020-09-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 71,530 -24,729 -25.69 4,928 -15.38 1.0274
2020-08-14 2020-06-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 96,259 96,259 5,824 1.1530
2020-05-15 2020-03-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 0 -125,580 -100.00 0 -100.00
2020-02-14 2019-12-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 125,580 -5,897 -4.49 6,970 1.07 1.3890
2019-11-14 2019-09-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 131,477 -8,480 -6.06 6,896 -6.81 1.2354
2019-08-14 2019-06-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 139,957 15,103 12.10 7,400 13.43 1.2522
2019-05-15 2019-03-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 124,854 124,854 6,524 1.0795
2019-02-14 2018-12-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 0 -135,399 -100.00 0 -100.00
2018-11-14 2018-09-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 135,399 -4,497 -3.21 7,303 -1.54 1.0710
2018-08-14 2018-06-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 139,896 -10,035 -6.69 7,417 -4.23 1.1237
2018-05-15 2018-03-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 149,931 69,835 87.19 7,745 91.09 1.2457
2018-02-14 2017-12-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 80,096 -115 -0.14 4,053 -1.05 0.7004
2017-11-14 2017-09-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 80,211 64,971 426.32 4,096 441.80 0.7389
2017-08-14 2017-06-30 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 15,240 306 2.05 756 5.29 0.1423
2017-05-15 2017-03-31 13F SPDR BBG BARC CONVERTIBLE ETP 78464A359 14,934 14,934 718 0.1430
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.