William John Sempolinski’s Palantir PLTR Stock Holding History

William John Sempolinski’s Portfolio PLTR Stock Details PLTR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	–	Sell	-5,090	Closed	-$745K	–	110
2026 Q1	$745K	Sell	5,090 -1,600	-24%	-$245K	0.37%	52
2025 Q4	$1.19M	Buy	+6,690	New	+$1.21M	0.59%	35

Other funds holding PLTR

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

William John Sempolinski's PLTR Position: Q2 2026 in Review

William John Sempolinski sold out of Palantir (PLTR) in Q2 2026, closing a stake of 5,090 shares — an estimated $745K sold.

William John Sempolinski first reported a position in PLTR in Q4 2025 and held it in 2 quarters. The position peaked at $1.19M in Q4 2025. 2,842 funds tracked by Wall St. Rank hold PLTR as of Q2 2026.

William John Sempolinski reported no remaining Palantir position as of Q2 2026 after selling out during the quarter.
William John Sempolinski sold 5,090 Palantir shares in Q2 2026, an estimated $745K.
William John Sempolinski first reported a position in Palantir in Q4 2025 and held it in 2 quarters.
William John Sempolinski's Palantir position peaked at $1.19M in Q4 2025.
2,842 funds tracked by Wall St. Rank held Palantir as of Q2 2026.

Based on William John Sempolinski's 13F filing for Q2 2026, filed 14 Aug 2026.