O'Brien Greene & Co’s Ecopetrol EC Stock Holding History

O'Brien Greene & Co’s Portfolio EC Stock Details EC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$1.18M	Buy	83,000 +19,000	+30%	+$275K	0.33%	49
2026 Q1	$959K	Buy	64,000 +54,000	+540%	+$684K	0.27%	53
2025 Q4	$100K	Buy	+10,000	New	+$95.4K	0.03%	134

Other funds holding EC

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

Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return

GFS Advisors Houston, Texas $948M AUM 41.15% 1-Year Est. Return

Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return

Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

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

O'Brien Greene & Co's EC Position: Q2 2026 in Review

O'Brien Greene & Co increased its Ecopetrol (EC) stake by 30% in Q2 2026, buying an estimated $275K and bringing the position to 83,000 shares worth $1.18M. The position accounts for 0.33% of the portfolio, ranked #49.

O'Brien Greene & Co first reported a position in EC in Q4 2025 and has held it in 3 quarters since. 164 funds tracked by Wall St. Rank hold EC as of Q2 2026.

O'Brien Greene & Co held 83,000 shares of Ecopetrol worth $1.18M as of Q2 2026.
O'Brien Greene & Co bought 19,000 Ecopetrol shares in Q2 2026, an estimated $275K.
Ecopetrol made up 0.33% of O'Brien Greene & Co's portfolio in Q2 2026, its #49 holding.
O'Brien Greene & Co first reported a position in Ecopetrol in Q4 2025 and has held it in 3 quarters since.
164 funds tracked by Wall St. Rank held Ecopetrol as of Q2 2026.

Based on O'Brien Greene & Co's 13F filing for Q2 2026, filed 6 Aug 2026.