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Mangrove Partners’s AnaptysBio ANAB Stock Holding History

Mangrove Partners’s Portfolio ANAB Stock Details ANAB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$235K Sell
3,475
-233
-6% -$14.1K 0.02% 322
2026
Q1 		$206K Buy
+3,708
New +$200K 0.02% 363
2024
Q4 		– Sell
-689,521
Closed -$23.1M – 160
2024
Q3 		$23.1M Hold
689,521
– – 1.99% 18
2024
Q2 		$17.3M Hold
689,521
– – 1.33% 24
2024
Q1 		$15.5M Buy
+689,521
New +$16.3M 1.08% 31

Other funds holding ANAB

EC
EcoR1 Capital San Francisco, California $2.06B AUM 215.32% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
TCM
Tang Capital Management San Diego, California $2.2B AUM 156.35% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AAA
Affinity Asset Advisors New York $2.21B AUM 431.26% 1-Year Est. Return
S
Sanofi Paris, France $534M AUM 205.96% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
WP
Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return
6CM
683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return

Mangrove Partners's ANAB Position: Q2 2026 in Review

Mangrove Partners reduced its AnaptysBio (ANAB) stake by 6.3% in Q2 2026, selling an estimated $14.1K and leaving 3,475 shares worth $235K. The position accounts for 0.02% of the portfolio, ranked #322.

Mangrove Partners first reported a position in ANAB in Q1 2024 and has held it in 5 quarters since. The position peaked at $23.1M in Q3 2024. 213 funds tracked by Wall St. Rank hold ANAB as of Q2 2026.

  • Mangrove Partners held 3,475 shares of AnaptysBio worth $235K as of Q2 2026.
  • Mangrove Partners sold 233 AnaptysBio shares in Q2 2026, an estimated $14.1K.
  • AnaptysBio made up 0.02% of Mangrove Partners's portfolio in Q2 2026, its #322 holding.
  • Mangrove Partners first reported a position in AnaptysBio in Q1 2024 and has held it in 5 quarters since.
  • Mangrove Partners's AnaptysBio position peaked at $23.1M in Q3 2024.
  • 213 funds tracked by Wall St. Rank held AnaptysBio as of Q2 2026.

Based on Mangrove Partners's 13F filing for Q2 2026, filed 14 Aug 2026.