Mariner
SNDX icon

Mariner’s Syndax Pharmaceuticals SNDX Stock Holding History

Mariner’s Portfolio SNDX Stock Details SNDX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$833K Sell
38,128
-35,071
-48% -$729K ﹤0.01% 2095
2026
Q1 		$1.71M Buy
73,199
+18,212
+33% +$396K ﹤0.01% 1611
2025
Q4 		$1.15M Buy
54,987
+31,547
+135% +$550K ﹤0.01% 1849
2025
Q3 		$361K Buy
+23,440
New +$307K ﹤0.01% 2666

Other funds holding SNDX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
KCM
Kynam Capital Management Princeton, New Jersey $1.81B AUM 192.15% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
DM
Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return
EP
Eversept Partners New York $1.93B AUM 160.8% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
HRCM
Hood River Capital Management Palm Beach Gardens, Florida $13.8B AUM 163.97% 1-Year Est. Return

Mariner's SNDX Position: Q2 2026 in Review

Mariner reduced its Syndax Pharmaceuticals (SNDX) stake by 48% in Q2 2026, selling an estimated $729K and leaving 38,128 shares worth $833K. The position accounts for ﹤0.01% of the portfolio, ranked #2095.

Mariner first reported a position in SNDX in Q3 2025 and has held it in 4 quarters since. The position peaked at $1.71M in Q1 2026. 243 funds tracked by Wall St. Rank hold SNDX as of Q2 2026.

  • Mariner held 38,128 shares of Syndax Pharmaceuticals worth $833K as of Q2 2026.
  • Mariner sold 35,071 Syndax Pharmaceuticals shares in Q2 2026, an estimated $729K.
  • Syndax Pharmaceuticals made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #2095 holding.
  • Mariner first reported a position in Syndax Pharmaceuticals in Q3 2025 and has held it in 4 quarters since.
  • Mariner's Syndax Pharmaceuticals position peaked at $1.71M in Q1 2026.
  • 243 funds tracked by Wall St. Rank held Syndax Pharmaceuticals as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.