GAMMA Investing’s Upstream Bio Inc UPB Stock Holding History

GAMMA Investing’s Portfolio UPB Stock Details UPB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q3	$8.58K	Buy	1,628 +464	+40%	+$3.04K	﹤0.01%	3433
2026 Q2	$8.05K	Buy	1,164 +449	+63%	+$3.76K	﹤0.01%	3297
2026 Q1	$6.43K	Sell	715 -185	-21%	-$3.33K	﹤0.01%	3267
2025 Q4	$24.4K	Buy	900 +10	+1%	+$249	﹤0.01%	2495
2025 Q3	$16.7K	Buy	890 +197	+28%	+$3.06K	﹤0.01%	2608
2025 Q2	$7.61K	Buy	693 +100	+17%	+$924	﹤0.01%	2942
2025 Q1	$3.63K	Buy	+593	New	+$5.66K	﹤0.01%	3212

Other funds holding UPB

FFA

Farther Finance Advisors San Francisco, California $14.2B AUM 18.33% 1-Year Est. Return

GAMMA Investing's UPB Position: Q3 2026 in Review

GAMMA Investing increased its Upstream Bio Inc (UPB) stake by 40% in Q3 2026, buying an estimated $3.04K and bringing the position to 1,628 shares worth $8.58K. The position accounts for ﹤0.01% of the portfolio, ranked #3433.

GAMMA Investing first reported a position in UPB in Q1 2025 and has held it in 7 quarters since. The position peaked at $24.4K in Q4 2025. 2 funds tracked by Wall St. Rank hold UPB as of Q3 2026.

GAMMA Investing held 1,628 shares of Upstream Bio Inc worth $8.58K as of Q3 2026.
GAMMA Investing bought 464 Upstream Bio Inc shares in Q3 2026, an estimated $3.04K.
Upstream Bio Inc made up ﹤0.01% of GAMMA Investing's portfolio in Q3 2026, its #3433 holding.
GAMMA Investing first reported a position in Upstream Bio Inc in Q1 2025 and has held it in 7 quarters since.
GAMMA Investing's Upstream Bio Inc position peaked at $24.4K in Q4 2025.
2 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q3 2026.

Based on GAMMA Investing's 13F filing for Q3 2026, filed 8 Oct 2026.