Mariner
ALAB icon

Mariner’s Astera Labs ALAB Stock Holding History

Mariner’s Portfolio ALAB Stock Details ALAB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$784K Sell
7,148
-2,549
-26% -$363K ﹤0.01% 2148
2025
Q4 		$1.61M Sell
9,697
-10,481
-52% -$1.75M ﹤0.01% 1628
2025
Q3 		$3.95M Buy
20,178
+5,145
+34% +$846K 0.01% 1041
2025
Q2 		$1.36M Buy
15,033
+3,622
+32% +$286K ﹤0.01% 1590
2025
Q1 		$681K Buy
11,411
+5,518
+94% +$510K ﹤0.01% 1954
2024
Q4 		$781K Buy
+5,893
New +$553K ﹤0.01% 1830

Other funds holding ALAB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
AM
Atreides Management Boston, Massachusetts $5B AUM 78.34% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
FAM
Fred Alger Management New York $22.8B AUM 64.63% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Amundi
Amundi Paris, France $367B AUM 31.23% 1-Year Est. Return

Mariner's ALAB Position: Q1 2026 in Review

Mariner reduced its Astera Labs (ALAB) stake by 26% in Q1 2026, selling an estimated $363K and leaving 7,148 shares worth $784K. The position accounts for ﹤0.01% of the portfolio, ranked #2148.

Mariner first reported a position in ALAB in Q4 2024 and has held it in 6 quarters since. The position peaked at $3.95M in Q3 2025. 703 funds tracked by Wall St. Rank hold ALAB as of Q1 2026.

  • Mariner held 7,148 shares of Astera Labs worth $784K as of Q1 2026.
  • Mariner sold 2,549 Astera Labs shares in Q1 2026, an estimated $363K.
  • Astera Labs made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #2148 holding.
  • Mariner first reported a position in Astera Labs in Q4 2024 and has held it in 6 quarters since.
  • Mariner's Astera Labs position peaked at $3.95M in Q3 2025.
  • 703 funds tracked by Wall St. Rank held Astera Labs as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.