JY
PHAT icon

Jeff Yass’s Phathom Pharmaceuticals PHAT Stock Holding History

Jeff Yass’s Portfolio PHAT Stock Details PHAT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$192K Sell
17,725
-75,254
-81% -$859K ﹤0.01% 11993
2026
Q1 		$1.03M Sell
92,979
-456,192
-83% -$5.76M ﹤0.01% 7809
2025
Q4 		$9.11M Buy
549,171
+394,894
+256% +$5.64M ﹤0.01% 3173
2025
Q3 		$1.82M Buy
154,277
+20,069
+15% +$207K ﹤0.01% 5995
2025
Q2 		$1.29M Sell
134,208
-26,930
-17% -$149K ﹤0.01% 6799
2025
Q1 		$1.01M Sell
161,138
-74,266
-32% -$451K ﹤0.01% 7238
2024
Q4 		$1.91M Buy
235,404
+56,734
+32% +$703K ﹤0.01% 5416
2024
Q3 		$3.23M Buy
+178,670
New +$2.5M ﹤0.01% 4406
2024
Q2 		– Sell
-59,437
Closed -$612K – 12947
2024
Q1 		$631K Buy
59,437
+7,124
+14% +$60.5K ﹤0.01% 7951
2023
Q4 		$478K Buy
+52,313
New +$451K ﹤0.01% 8782
2023
Q3 		– Sell
-63,408
Closed -$870K – 12730
2023
Q2 		$908K Sell
63,408
-83,008
-57% -$957K ﹤0.01% 6907
2023
Q1 		$1.05M Buy
146,416
+119,849
+451% +$1.05M ﹤0.01% 6701
2022
Q4 		$298K Buy
26,567
+2,668
+11% +$27.5K ﹤0.01% 9116
2022
Q3 		$265K Buy
+23,899
New +$228K ﹤0.01% 10116
2021
Q2 		– Sell
-26,505
Closed -$949K – 13082
2021
Q1 		$996K Buy
26,505
+2,246
+9% +$94K ﹤0.01% 7751
2020
Q4 		$806K Buy
+24,259
New +$983K ﹤0.01% 7206

Other funds holding PHAT

FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
MVM
Medicxi Ventures Management St. Helier, Jersey $177M AUM 212.06% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
CG
Carlyle Group Washington, District of Columbia $10B AUM 10.61% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
GKIM
GW&K Investment Management Boston, Massachusetts $12.8B AUM 48.82% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.59B AUM 234.06% 1-Year Est. Return

Jeff Yass's PHAT Position: Q2 2026 in Review

Jeff Yass reduced its Phathom Pharmaceuticals (PHAT) stake by 81% in Q2 2026, selling an estimated $859K and leaving 17,725 shares worth $192K. The position accounts for ﹤0.01% of the portfolio, ranked #11993.

Jeff Yass first reported a position in PHAT in Q4 2020 and has held it in 16 quarters since. The position peaked at $9.11M in Q4 2025. 161 funds tracked by Wall St. Rank hold PHAT as of Q2 2026.

  • Jeff Yass held 17,725 shares of Phathom Pharmaceuticals worth $192K as of Q2 2026.
  • Jeff Yass sold 75,254 Phathom Pharmaceuticals shares in Q2 2026, an estimated $859K.
  • Phathom Pharmaceuticals made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #11993 holding.
  • Jeff Yass first reported a position in Phathom Pharmaceuticals in Q4 2020 and has held it in 16 quarters since.
  • Jeff Yass's Phathom Pharmaceuticals position peaked at $9.11M in Q4 2025.
  • 161 funds tracked by Wall St. Rank held Phathom Pharmaceuticals as of Q2 2026.

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