XT
PHAT icon

XTX Topco’s Phathom Pharmaceuticals PHAT Stock Holding History

XTX Topco’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
Q1 		$1.78M Buy
160,501
+121,101
+307% +$1.53M 0.03% 919
2025
Q4 		$654K Sell
39,400
-15,187
-28% -$217K 0.02% 1372
2025
Q3 		$642K Buy
54,587
+40,257
+281% +$415K 0.03% 887
2025
Q2 		$137K Sell
14,330
-75,861
-84% -$420K 0.01% 1811
2025
Q1 		$565K Buy
+90,191
New +$548K 0.03% 936
2023
Q4 		– Sell
-14,847
Closed -$154K – 1995
2023
Q3 		$154K Buy
+14,847
New +$204K 0.03% 1099

Other funds holding PHAT

FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
MVM
Medicxi Ventures Management St. Helier, Jersey $982M AUM 210.17% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
CG
Carlyle Group Washington, District of Columbia $10.6B AUM 11.25% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
NMC
NEA Management Company Timonium, Maryland $1.76B AUM 223.33% 1-Year Est. Return
6CM
683 Capital Management New York $1.92B AUM 85.52% 1-Year Est. Return
Ensign Peak Advisors
Ensign Peak Advisors Salt Lake City, Utah $53.7B AUM 29.47% 1-Year Est. Return

XTX Topco's PHAT Position: Q1 2026 in Review

XTX Topco increased its Phathom Pharmaceuticals (PHAT) stake by 307% in Q1 2026, buying an estimated $1.53M and bringing the position to 160,501 shares worth $1.78M. The position accounts for 0.03% of the portfolio, ranked #919.

XTX Topco first reported a position in PHAT in Q3 2023 and has held it in 6 quarters since. 174 funds tracked by Wall St. Rank hold PHAT as of Q1 2026.

  • XTX Topco held 160,501 shares of Phathom Pharmaceuticals worth $1.78M as of Q1 2026.
  • XTX Topco bought 121,101 Phathom Pharmaceuticals shares in Q1 2026, an estimated $1.53M.
  • Phathom Pharmaceuticals made up 0.03% of XTX Topco's portfolio in Q1 2026, its #919 holding.
  • XTX Topco first reported a position in Phathom Pharmaceuticals in Q3 2023 and has held it in 6 quarters since.
  • 174 funds tracked by Wall St. Rank held Phathom Pharmaceuticals as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.