William Blair & Company
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William Blair & Company’s State Street SPDR Portfolio Mortgage Backed Bond ETF SPMB Stock Holding History

William Blair & Company’s Portfolio SPMB Stock Details SPMB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$49.7K Buy
2,228
+1,845
+482% +$41.1K ﹤0.01% 1775
2026
Q1 		$8.57K Sell
383
-108
-22% -$2.43K ﹤0.01% 1843
2025
Q4 		$11K Buy
491
+108
+28% +$2.43K ﹤0.01% 1777
2025
Q3 		$8.6K Hold
383
– – ﹤0.01% 1771
2025
Q2 		$8.46K Sell
383
-455
-54% -$9.92K ﹤0.01% 1740
2025
Q1 		$18.5K Sell
838
-982
-54% -$21.4K ﹤0.01% 1668
2024
Q4 		$39.2K Buy
1,820
+1,437
+375% +$31.5K ﹤0.01% 1635
2024
Q3 		$8.63K Hold
383
– – ﹤0.01% 1756
2024
Q2 		$8.26K Buy
383
+213
+125% +$4.55K ﹤0.01% 1754
2024
Q1 		$3.69K Buy
+170
New +$3.69K ﹤0.01% 1754
2023
Q4 		– Sell
-12
Closed -$252 – 1846
2023
Q3 		$252 Hold
12
– – ﹤0.01% 1787
2023
Q2 		$264 Buy
+12
New +$264 ﹤0.01% 1805
2022
Q4 		– Sell
-1,423
Closed -$31K – 1875
2022
Q3 		$31K Buy
+1,423
New +$32.3K ﹤0.01% 1652

Other funds holding SPMB

Financial Engines Advisors
Financial Engines Advisors Santa Clara, California $56.3B AUM 17.83% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $445B AUM 25.58% 1-Year Est. Return
Stifel Financial
Stifel Financial St. Louis, Missouri $120B AUM 27.84% 1-Year Est. Return
BEI
Benjamin Edwards Inc Clayton, Missouri $11B AUM 18.22% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
CIM
Confluence Investment Management St. Louis, Missouri $6.4B AUM 9.79% 1-Year Est. Return
CI
CX Institutional Auburn, Indiana $3.46B AUM 21.89% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
AA
Advisory Alpha Holland, Michigan $4.08B AUM 20.62% 1-Year Est. Return
AssetMark Inc
AssetMark Inc Concord, California $58.2B AUM 22.78% 1-Year Est. Return

William Blair & Company's SPMB Position: Q2 2026 in Review

William Blair & Company increased its State Street SPDR Portfolio Mortgage Backed Bond ETF (SPMB) stake by 482% in Q2 2026, buying an estimated $41.1K and bringing the position to 2,228 shares worth $49.7K. The position accounts for ﹤0.01% of the portfolio, ranked #1775.

William Blair & Company first reported a position in SPMB in Q3 2022 and has held it in 13 quarters since. 256 funds tracked by Wall St. Rank hold SPMB as of Q2 2026.

  • William Blair & Company held 2,228 shares of State Street SPDR Portfolio Mortgage Backed Bond ETF worth $49.7K as of Q2 2026.
  • William Blair & Company bought 1,845 State Street SPDR Portfolio Mortgage Backed Bond ETF shares in Q2 2026, an estimated $41.1K.
  • State Street SPDR Portfolio Mortgage Backed Bond ETF made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1775 holding.
  • William Blair & Company first reported a position in State Street SPDR Portfolio Mortgage Backed Bond ETF in Q3 2022 and has held it in 13 quarters since.
  • 256 funds tracked by Wall St. Rank held State Street SPDR Portfolio Mortgage Backed Bond ETF as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.