Massachusetts Financial Services’s AnaptysBio ANAB Stock Holding History

Massachusetts Financial Services’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	$1.07M	Buy	+15,870	New	+$962K	﹤0.01%	882
2022 Q2	–	Sell	-68,201	Closed	-$1.69M	–	849
2022 Q1	$1.69M	Sell	68,201 -13,003	-16%	-$394K	﹤0.01%	767
2021 Q4	$2.82M	Sell	81,204 -14,991	-16%	-$475K	﹤0.01%	739
2021 Q3	$2.61M	Sell	96,195 -1,262	-1%	-$32K	﹤0.01%	755
2021 Q2	$2.53M	Buy	97,457 +63,124	+184%	+$1.51M	﹤0.01%	756
2021 Q1	$740K	Sell	34,333 -4,067	-11%	-$103K	﹤0.01%	861
2020 Q4	$826K	Sell	38,400 -384	-1%	-$9.32K	﹤0.01%	808
2020 Q3	$572K	Buy	+38,784	New	+$700K	﹤0.01%	821

Other funds holding ANAB

EcoR1 Capital San Francisco, California $2.06B AUM 215.32% 1-Year Est. Return

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 Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

AAA

Affinity Asset Advisors New York $2.21B AUM 431.26% 1-Year Est. Return

Sanofi Paris, France $534M AUM 205.96% 1-Year Est. Return

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

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

Massachusetts Financial Services's ANAB Position: Q2 2026 in Review

Massachusetts Financial Services opened a new position in AnaptysBio (ANAB) in Q2 2026: 15,870 shares worth $1.07M. The stake represents ﹤0.01% of the portfolio and ranks #882 among its holdings. This is a return to the name: Massachusetts Financial Services previously reported a position in ANAB as recently as Q1 2022.

Massachusetts Financial Services first reported a position in ANAB in Q3 2020 and has held it in 8 quarters since. The position peaked at $2.82M in Q4 2021. 214 funds tracked by Wall St. Rank hold ANAB as of Q2 2026.

Massachusetts Financial Services held 15,870 shares of AnaptysBio worth $1.07M as of Q2 2026.
AnaptysBio was a new Massachusetts Financial Services position in Q2 2026.
AnaptysBio made up ﹤0.01% of Massachusetts Financial Services's portfolio in Q2 2026, its #882 holding.
Massachusetts Financial Services first reported a position in AnaptysBio in Q3 2020 and has held it in 8 quarters since.
Massachusetts Financial Services's AnaptysBio position peaked at $2.82M in Q4 2021.
214 funds tracked by Wall St. Rank held AnaptysBio as of Q2 2026.

Based on Massachusetts Financial Services's 13F filing for Q2 2026, filed 3 Aug 2026.