Rock Springs Capital Management’s Ultragenyx Pharmaceutical RARE Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$25.5M Sell
1,218,773
-48,468
-4% -$1.09M 1.5% 20
2025
Q4
$29.1M Buy
1,267,241
+20,900
+2% +$687K 1.49% 21
2025
Q3
$37.5M Sell
1,246,341
-144,731
-10% -$4.34M 2.19% 13
2025
Q2
$50.6M Sell
1,391,072
-3,362
-0.2% -$121K 3.15% 6
2025
Q1
$50.5M Sell
1,394,434
-345,379
-20% -$14.4M 2.89% 8
2024
Q4
$73.2M Sell
1,739,813
-238,459
-12% -$11.8M 2.79% 9
2024
Q3
$110M Buy
1,978,272
+54,200
+3% +$2.76M 3.58% 5
2024
Q2
$79.1M Buy
1,924,072
+149,134
+8% +$6.37M 2.38% 8
2024
Q1
$82.9M Buy
1,774,938
+20,900
+1% +$986K 2.1% 12
2023
Q4
$83.9M Buy
1,754,038
+277,597
+19% +$10.8M 2.06% 15
2023
Q3
$52.6M Buy
1,476,441
+92,172
+7% +$3.65M 1.41% 25
2023
Q2
$63.9M Buy
1,384,269
+47,868
+4% +$2.22M 1.52% 23
2023
Q1
$53.6M Buy
1,336,401
+46,122
+4% +$1.98M 1.28% 28
2022
Q4
$59.8M Buy
1,290,279
+102,287
+9% +$4.02M 1.44% 24
2022
Q3
$49.2M Buy
1,187,992
+94,962
+9% +$4.88M 1.27% 24
2022
Q2
$65.2M Buy
1,093,030
+64,921
+6% +$3.99M 1.9% 11
2022
Q1
$74.7M Buy
1,028,109
+144,188
+16% +$10M 1.88% 16
2021
Q4
$74.3M Buy
883,921
+82,812
+10% +$6.74M 1.72% 16
2021
Q3
$72.3M Buy
801,109
+336,109
+72% +$30.4M 1.52% 20
2021
Q2
$44.3M Buy
465,000
+15,000
+3% +$1.56M 0.88% 34
2021
Q1
$51.2M Sell
450,000
-116,500
-21% -$15.9M 1.12% 29
2020
Q4
$78.4M Sell
566,500
-10,341
-2% -$1.23M 1.66% 14
2020
Q3
$47.4M Sell
576,841
-70,000
-11% -$5.8M 1.2% 29
2020
Q2
$50.6M Sell
646,841
-100,959
-14% -$6.68M 1.39% 19
2020
Q1
$33.2M Buy
747,800
+47,800
+7% +$2.48M 1.37% 25
2019
Q4
$29.9M Buy
700,000
+92,000
+15% +$3.8M 0.94% 42
2019
Q3
$26M Buy
608,000
+28,000
+5% +$1.52M 1.04% 31
2019
Q2
$36.8M Hold
580,000
1.33% 21
2019
Q1
$40.2M Buy
580,000
+155,000
+36% +$8.86M 1.55% 11
2018
Q4
$18.5M Buy
425,000
+225,000
+113% +$12.3M 0.87% 35
2018
Q3
$15.3M Hold
200,000
0.55% 63
2018
Q2
$15.4M Buy
200,000
+27,000
+16% +$1.74M 0.59% 65
2018
Q1
$8.82M Buy
173,000
+10,000
+6% +$504K 0.38% 87
2017
Q4
$7.56M Hold
163,000
0.34% 87
2017
Q3
$8.68M Buy
163,000
+2,500
+2% +$148K 0.4% 80
2017
Q2
$9.97M Buy
160,500
+750
+0.5% +$45.2K 0.5% 62
2017
Q1
$10.8M Hold
159,750
0.62% 53
2016
Q4
$11.2M Buy
159,750
+12,750
+9% +$905K 0.75% 44
2016
Q3
$10.4M Buy
147,000
+5,500
+4% +$351K 0.65% 52
2016
Q2
$6.92M Buy
141,500
+23,000
+19% +$1.49M 0.51% 61
2016
Q1
$7.5M Buy
118,500
+13,000
+12% +$851K 0.63% 50
2015
Q4
$11.8M Sell
105,500
-1,500
-1% -$150K 0.9% 37
2015
Q3
$10.3M Buy
107,000
+15,000
+16% +$1.72M 0.84% 40
2015
Q2
$9.42M Hold
92,000
0.69% 50
2015
Q1
$5.71M Buy
92,000
+21,000
+30% +$1.17M 0.53% 68
2014
Q4
$3.12M Buy
71,000
+3,500
+5% +$160K 0.36% 78
2014
Q3
$3.82M Buy
67,500
+2,000
+3% +$101K 0.59% 52
2014
Q2
$2.94M Buy
65,500
+14,000
+27% +$576K 0.53% 65
2014
Q1
$2.52M Buy
+51,500
New +$2.65M 0.58% 54

Other funds holding RARE

Rock Springs Capital Management's RARE Position: Q1 2026 in Review

Rock Springs Capital Management reduced its Ultragenyx Pharmaceutical (RARE) stake by 3.8% in Q1 2026, selling an estimated $1.09M and leaving 1,218,773 shares worth $25.5M. The position accounts for 1.5% of the portfolio, ranked #20.

Rock Springs Capital Management first reported a position in RARE in Q1 2014 and has held it in 49 quarters since. The position peaked at $110M in Q3 2024. 296 funds tracked by Wall St. Rank hold RARE as of Q1 2026.

  • Rock Springs Capital Management held 1,218,773 shares of Ultragenyx Pharmaceutical worth $25.5M as of Q1 2026.
  • Rock Springs Capital Management sold 48,468 Ultragenyx Pharmaceutical shares in Q1 2026, an estimated $1.09M.
  • Ultragenyx Pharmaceutical made up 1.5% of Rock Springs Capital Management's portfolio in Q1 2026, its #20 holding.
  • Rock Springs Capital Management first reported a position in Ultragenyx Pharmaceutical in Q1 2014 and has held it in 49 quarters since.
  • Rock Springs Capital Management's Ultragenyx Pharmaceutical position peaked at $110M in Q3 2024.
  • 296 funds tracked by Wall St. Rank held Ultragenyx Pharmaceutical as of Q1 2026.

Based on Rock Springs Capital Management's 13F filing for Q1 2026, filed 15 May 2026.