Rock Springs Capital Management Lp

AVIR

10% OWNER · ATEA PHARMACEUTICALS, INC. · CIK 0001595725

FILING MIX · LIFETIME54%/46%

BUYS

SELLS

TOTAL VALUE

$14.00M

COMPANIES

ACTIVE SINCE

Nov 2020

HOLDINGS NOW

1,256,472

AVG SELL PX

—

Trades · vs SPY

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Performance · forward returns vs SPY

3 backtested trades · 8 horizonsHow are these numbers computed? →

Forward-return performance of every backtestable P/S trade by Rock Springs Capital Management Lp, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.

HORIZON	TRADES	WIN RATE	INSIDER RETURN	SPY RETURN	MEAN EXCESS	MEDIAN EXCESS	T-STAT
7d	3	+33.33%	+10.59%	+4.01%	+6.58%	-9.66%	—
14d	3	+100.00%	+26.96%	+5.71%	+21.25%	+11.15%	—
30d	3	+33.33%	+7.88%	+7.07%	+0.81%	-9.16%	—
60d	3	+66.67%	+31.37%	+9.02%	+22.35%	+36.68%	—
90d	3	+66.67%	+108.20%	+7.23%	+100.97%	+156.09%	—
180d	3	+0.00%	-37.45%	+15.13%	-52.58%	-43.76%	—
1y	3	+0.00%	-67.06%	+21.85%	-88.92%	-97.66%	—
2y	3	+0.00%	-81.46%	+6.88%	-88.33%	-92.17%	—

How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.

Holdings over time

AVIR · 0 shares · as of Nov 3, 2020

Trading cadence · quarterly flow

BUY ● SELL ●

2020

2021

FLOW · 7 buys / 6 sellsCOVERAGE · 5 quarters

Form 4 filings · all activity

COMPANY	TYPE	SHARES	PRICE	VALUE	HELD AFTER	TRADE DATE	FILED	DETAILS
XLO XILIO THERAPEUTICS, INC.	PURCHASE	151,294	—	—	151,294	Oct 26, 2021	Oct 26, 2021 ↗	View →
XLO XILIO THERAPEUTICS, INC.	SALE	1,437,297	—	—	0	Oct 26, 2021	Oct 26, 2021 ↗	View →
XLO XILIO THERAPEUTICS, INC.	SALE	7,186,490	—	—	0	Oct 26, 2021	Oct 26, 2021 ↗	View →
XLO XILIO THERAPEUTICS, INC.	PURCHASE	756,472	—	—	756,472	Oct 26, 2021	Oct 26, 2021 ↗	View →
XLO XILIO THERAPEUTICS, INC.	PURCHASE	500,000	$16.00	$8.00M	1,256,472	Oct 26, 2021	Oct 26, 2021 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	SALE	178,063	—	—	0	Nov 3, 2020	Nov 4, 2020 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	PURCHASE	242,708	$24.00	$5.82M	1,654,724	Nov 3, 2020	Nov 4, 2020 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	SALE	104,340	—	—	0	Nov 3, 2020	Nov 4, 2020 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	PURCHASE	7,292	$24.00	$175.0K	289,695	Nov 3, 2020	Nov 4, 2020 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	PURCHASE	1,412,016	—	—	1,412,016	Nov 3, 2020	Nov 4, 2020 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	SALE	890,313	—	—	0	Nov 3, 2020	Nov 4, 2020 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	PURCHASE	282,403	—	—	282,403	Nov 3, 2020	Nov 4, 2020 ↗	View →
AVIR ATEA PHARMACEUTICALS, INC.	SALE	521,703	—	—	0	Nov 3, 2020	Nov 4, 2020 ↗	View →

Other insiders · AVIR

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About this filer

CIK 0001595725

ROLE

10% Owner

PRIMARY

AVIR

COMPANIES

ACTIVE SINCE

Nov 2020

MARKETPEEL · /INSIDER/0001595725DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE

Rock Springs Capital Management Lp

The morning brief, before the bell.