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ROCK SPRINGS CAPITAL MANAGEMENT LP

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BALTIMORE MD Investment Advisor Hedge Fund
13F Summary

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Equal-WT
WhaleScore 2.0 ?

85

S&P 500
WhaleScore ?

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Equal-WT
WhaleScore 1.0 ?

Rock Springs Capital Management is based out of Baltimore. Rock Springs Capital Management is a hedge fund with 6 clients and discretionary assets under management (AUM) of $5,716,429,633 (Form ADV from 2023-03-31). Their last reported 13F filing for Q4 2023 included $4,062,169,985 in managed 13F securities and a top 10 holdings concentration of 37.39%. Rock Springs Capital Management's largest holding is Blueprint Medicines Corp with shares held of 2,881,567. Whalewisdom has at least 41 13F filings, 85 13G filings, and 11 Form 4 filings

2023-12-31

Top Buys (13F)

2023-12-31

Top Sells (13F)

Name % Change
SGEN Seagen Inc 2.27%
HUM Humana, Inc. 2.19%
AKRO Akero Therapeutics I 1.3%
ARGX Argenx SE ADS ADR 1.26%
WST West Pharmaceutical 0.84%

2023-12-31

13F Holdings Summary

Name $ Change
BPMC Blueprint Medicines 6.54%
IMCR Immunocore Holdings 4.48%
KRTX Karuna Therapeutics 4.01%
NBIX Neurocrine Bioscienc 3.88%
HUM Humana, Inc. 3.49%

2023-12-31

13F Activity

Market Value $4.06b, Prior: $3.73b
New Purchases 4 stocks
Added To 35 stocks
Sold out of 20 stocks
Reduced holdings in 29 stocks
Top 10 Holdings % 37.39%
Turnover %[1] 23.08%
Turnover Alt %[2] 6.4%
Time Held Top 20 8.7 quarters
Time Held Top 10 7.5 quarters
Time Held All 16.09 quarters

[1]: Turnover is calculated by taking the # of new holdings (initial purchases) + the # of positions sold out of (not just reduced) divided by the total # of holdings for the quarter.

[2]: Alt Turnover is calculated by taking either the total MV of new purchases or the MV of securities sold, whichever is less, divided by the total MV of the fund.

2023-12-31

13F Sector Allocation Over Time

2023-12-31

Analysis

Top 20 equal-weighted holdings. Performance numbers calculated through 2023-12-31

Portfolio Performance