JY
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Jeff Yass’s Genmab GMAB Stock Holding History

Jeff Yass’s Portfolio GMAB Stock Details GMAB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$6.08M Buy
221,400
+114,600
+107% +$3.05M ﹤0.01% 4249
2026
Q1 		$2.87M Buy
106,800
+91,400
+594% +$2.74M ﹤0.01% 5360
2025
Q4 		$474K Buy
15,400
+3,100
+25% +$96.6K ﹤0.01% 8912
2025
Q3 		$377K Sell
12,300
-1,900
-13% -$46.3K ﹤0.01% 9603
2025
Q2 		$293K Sell
14,200
-24,100
-63% -$495K ﹤0.01% 10385
2025
Q1 		$750K Buy
38,300
+23,200
+154% +$487K ﹤0.01% 7982
2024
Q4 		$315K Buy
+15,100
New +$332K ﹤0.01% 9739
2024
Q2 		– Sell
-9,100
Closed -$272K – 12468
2024
Q1 		$272K Buy
9,100
+200
+2% +$5.88K ﹤0.01% 9921
2023
Q4 		$283K Sell
8,900
-17,200
-66% -$540K ﹤0.01% 9950
2023
Q3 		$921K Buy
26,100
+16,300
+166% +$621K ﹤0.01% 6811
2023
Q2 		$372K Sell
9,800
-106,500
-92% -$4.25M ﹤0.01% 8995
2023
Q1 		$4.39M Buy
116,300
+93,600
+412% +$3.6M ﹤0.01% 3646
2022
Q4 		$962K Sell
22,700
-8,200
-27% -$338K ﹤0.01% 6280
2022
Q3 		$993K Sell
30,900
-23,200
-43% -$815K ﹤0.01% 6647
2022
Q2 		$1.76M Buy
+54,100
New +$1.75M ﹤0.01% 5184
2021
Q4 		– Sell
-8,900
Closed -$389K – 13397
2021
Q3 		$389K Sell
8,900
-56,500
-86% -$2.54M ﹤0.01% 10002
2021
Q2 		$2.67M Buy
65,400
+4,700
+8% +$181K ﹤0.01% 5288
2021
Q1 		$1.99M Buy
+60,700
New +$2.28M ﹤0.01% 5930
2020
Q4 		– Sell
-10,000
Closed -$366K – 11266
2020
Q3 		$366K Buy
+10,000
New +$362K ﹤0.01% 8312

Other funds holding GMAB

PBA
Paradigm Biocapital Advisors New York $5.34B AUM 380.18% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $29.1B AUM 60.8% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $302B AUM 26.44% 1-Year Est. Return
DM
Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
SI
Sofinnova Investments Menlo Park, California $1.93B AUM 134.74% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Jeff Yass's GMAB Position: Q2 2026 in Review

Jeff Yass opened a new position in Genmab (GMAB) in Q2 2026: 21,565 shares worth $592K. The stake represents ﹤0.01% of the portfolio and ranks #9512 among its holdings. This is a return to the name: Jeff Yass previously reported a position in GMAB as recently as Q4 2025.

Jeff Yass first reported a position in GMAB in Q4 2019 and has held it in 23 quarters since. The position peaked at $18.9M in Q4 2025. 289 funds tracked by Wall St. Rank hold GMAB as of Q2 2026.

  • Jeff Yass held 21,565 shares of Genmab worth $592K as of Q2 2026.
  • Genmab was a new Jeff Yass position in Q2 2026.
  • Genmab made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #9512 holding.
  • Jeff Yass first reported a position in Genmab in Q4 2019 and has held it in 23 quarters since.
  • Jeff Yass's Genmab position peaked at $18.9M in Q4 2025.
  • 289 funds tracked by Wall St. Rank held Genmab as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.