Cornerstone Planning Group
TNDM icon

Cornerstone Planning Group’s Tandem Diabetes Care TNDM Stock Holding History

Cornerstone Planning Group’s Portfolio TNDM Stock Details TNDM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		– Sell
-40
Closed -$676 – 1561
2026
Q2 		$676 Hold
40
– – ﹤0.01% 1605
2026
Q1 		$777 Hold
40
– – ﹤0.01% 1529
2025
Q4 		$764 Sell
40
-83
-67% -$1.5K ﹤0.01% 1405
2025
Q3 		$18.7K Buy
+123
New +$1.66K ﹤0.01% 606

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Y-Intercept (HK)
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Banque Pictet & Cie
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New York State Teachers Retirement System (NYSTRS)
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Fideuram - Intesa Sanpaolo Private Banking
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Wealth Enhancement Advisory Services
Wealth Enhancement Advisory Services Plymouth, Minnesota $67.3B AUM 21.9% 1-Year Est. Return
Louisiana State Employees Retirement System
Louisiana State Employees Retirement System Baton Rouge, Louisiana $6.56B AUM 41.43% 1-Year Est. Return
Amalgamated Bank
Amalgamated Bank New York $14.3B AUM 35.81% 1-Year Est. Return
Yousif Capital Management
Yousif Capital Management Bloomfield Hills, Michigan $8.87B AUM 34.1% 1-Year Est. Return

Cornerstone Planning Group's TNDM Position: Q3 2026 in Review

Cornerstone Planning Group sold out of Tandem Diabetes Care (TNDM) in Q3 2026, closing a stake of 40 shares — an estimated $676 sold.

Cornerstone Planning Group first reported a position in TNDM in Q3 2025 and held it in 4 quarters. The position peaked at $18.7K in Q3 2025. 34 funds tracked by Wall St. Rank hold TNDM as of Q3 2026.

  • Cornerstone Planning Group reported no remaining Tandem Diabetes Care position as of Q3 2026 after selling out during the quarter.
  • Cornerstone Planning Group sold 40 Tandem Diabetes Care shares in Q3 2026, an estimated $676.
  • Cornerstone Planning Group first reported a position in Tandem Diabetes Care in Q3 2025 and held it in 4 quarters.
  • Cornerstone Planning Group's Tandem Diabetes Care position peaked at $18.7K in Q3 2025.
  • 34 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q3 2026.

Based on Cornerstone Planning Group's 13F filing for Q3 2026, filed 16 Oct 2026.