Main Street Research’s Palantir PLTR Stock Holding History

Main Street Research’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	$1.34M	Sell	11,444 -156,203	-93%	-$21.3M	0.06%	53
2026 Q1	$24.5M	Sell	167,647 -272,603	-62%	-$41.7M	1.43%	29
2025 Q4	$78.3M	Sell	440,250 -15,243	-3%	-$2.76M	4.48%	6
2025 Q3	$83.1M	Sell	455,493 -5,939	-1%	-$963K	4.49%	4
2025 Q2	$62.9M	Sell	461,432 -444,201	-49%	-$52.1M	3.92%	4
2025 Q1	$76.4M	Buy	905,633 +7,913	+0.9%	+$695K	4.99%	2
2024 Q4	$67.9M	Buy	897,720 +4,919	+0.6%	+$287K	4.23%	3
2024 Q3	$33.2M	Buy	+892,801	New	+$27.4M	2.09%	24
2023 Q1	–	Sell	-22,919	Closed	-$147K	–	104
2022 Q4	$147K	Sell	22,919 -3,042	-12%	-$23.1K	0.04%	93
2022 Q3	$211K	Buy	25,961 +40	+0.2%	+$356	0.05%	89
2022 Q2	$235K	Buy	+25,921	New	+$256K	0.06%	76

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

Main Street Research's PLTR Position: Q2 2026 in Review

Main Street Research reduced its Palantir (PLTR) stake by 93% in Q2 2026, selling an estimated $21.3M and leaving 11,444 shares worth $1.34M. The position accounts for 0.06% of the portfolio, ranked #53.

Main Street Research first reported a position in PLTR in Q2 2022 and has held it in 11 quarters since. The position peaked at $83.1M in Q3 2025. 2,838 funds tracked by Wall St. Rank hold PLTR as of Q2 2026.

Main Street Research held 11,444 shares of Palantir worth $1.34M as of Q2 2026.
Main Street Research sold 156,203 Palantir shares in Q2 2026, an estimated $21.3M.
Palantir made up 0.06% of Main Street Research's portfolio in Q2 2026, its #53 holding.
Main Street Research first reported a position in Palantir in Q2 2022 and has held it in 11 quarters since.
Main Street Research's Palantir position peaked at $83.1M in Q3 2025.
2,838 funds tracked by Wall St. Rank held Palantir as of Q2 2026.

Based on Main Street Research's 13F filing for Q2 2026, filed 29 Jul 2026.