PBYI β€” PUMA BIOTECHNOLOGY INC

Ownership history in Athyrium Capital Management, LP  Β·  11 quarters on record

AI Ownership Summary

Athyrium Capital Management, LP reported PUMA BIOTECHNOLOGY INC (PBYI) in 11 quarterly 13F filings from 2023 Q4 through 2024 Q3. Peak portfolio weight reached 36.88% in 2024 Q3. The latest visible filing shows PBYI at 36.88% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this PBYI ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Athyrium Capital Management, LP's position in PUMA BIOTECHNOLOGY INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2024 Q3

PBYI was reported at 36.88% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
36.88% in 2024 Q3

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2024 Q3

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

PBYI stock page Athyrium Capital Management, LP fund profile Athyrium Capital Management, LP full holdings
How Athyrium Capital Management, LP held PBYI β€” position size vs. price
% of Fund (quarterly)    PBYI price (quarter-end, indexed to 100)
πŸ“‹ Quarterly Holdings History 4 quarters  β–Ύ
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2024 Q3 UNCHANGED 1,256,411 β€” 0% 36.88% $3.20B 2024-11-14 (Est.) $2.99
2024 Q2 UNCHANGED 1,256,411 β€” 0% 12.21% $4.10B 2024-08-08 $3.83
2024 Q1 REDUCED 1,256,411 -535,703 -29.9% 9.15% $6.66B 2024-05-16 $4.41
2023 Q4 UNCHANGED 1,792,114 β€” 0% 11.27% $7.76B 2024-02-14 $7.40
7 older quarters hidden  β€”  Sign in free or upgrade to Premium to see full history

🏒 Other funds also holding PBYI

As of 2025 Q4 β€” sorted by position size

ACORN CAPITAL ADVISORS, LLC 8.33% GLOBEFLEX CAPITAL L P 3Y 7Y 0.41% Verdad Advisers, LP 3Y 0.38% Haven Private, LLC 0.24% VIRTUS ADVISERS, LLC 3Y 7Y 0.13% C2C Wealth Management, LLC 3Y 0.12% KENNEDY CAPITAL MANAGEMENT LLC 3Y 7Y 0.11% BRIDGEWAY CAPITAL MANAGEMENT, LLC 3Y 7Y 0.1% Round Rock Advisors LLC 3Y 0.09% EntryPoint Capital, LLC 0.08%

FAQ About Athyrium Capital Management, LP and PBYI

These are the practical questions this page is built to answer before you even open the full history table.

How long has Athyrium Capital Management, LP reported owning PBYI?

Athyrium Capital Management, LP reported PBYI across 4 quarterly 13F filings, from 2023 Q4 through 2024 Q3.

What was the largest reported PBYI position in Athyrium Capital Management, LP's portfolio?

The largest reported portfolio weight for PBYI was 36.88% in 2024 Q3.

What is the latest reported PBYI position on this page?

The most recent filing on this page is 2024 Q3, when Athyrium Capital Management, LP reported 1,256,411 shares, equal to 36.88% of portfolio, with an estimated market value of $3.20B.

What does the chart on this PBYI ownership page compare?

The chart compares Athyrium Capital Management, LP's quarterly PBYI portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

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