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
Q2 		$1.47M Sell
135,832
-24,669
-15% -$281K 0.02% 1425
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 $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

XTX Topco's PHAT Position: Q2 2026 in Review

XTX Topco reduced its Phathom Pharmaceuticals (PHAT) stake by 15% in Q2 2026, selling an estimated $281K and leaving 135,832 shares worth $1.47M. The position accounts for 0.02% of the portfolio, ranked #1425.

XTX Topco first reported a position in PHAT in Q3 2023 and has held it in 7 quarters since. The position peaked at $1.78M in Q1 2026. 161 funds tracked by Wall St. Rank hold PHAT as of Q2 2026.

  • XTX Topco held 135,832 shares of Phathom Pharmaceuticals worth $1.47M as of Q2 2026.
  • XTX Topco sold 24,669 Phathom Pharmaceuticals shares in Q2 2026, an estimated $281K.
  • Phathom Pharmaceuticals made up 0.02% of XTX Topco's portfolio in Q2 2026, its #1425 holding.
  • XTX Topco first reported a position in Phathom Pharmaceuticals in Q3 2023 and has held it in 7 quarters since.
  • XTX Topco's Phathom Pharmaceuticals position peaked at $1.78M in Q1 2026.
  • 161 funds tracked by Wall St. Rank held Phathom Pharmaceuticals as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.