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The company

Sutro Biopharma, Inc.

STRO · Nasdaq

Health CareBiotechnologyNot moving yet

STRO stood above a rising 150-day average in 34 of the last 52 weekly readings, and has been out of that trend for the last 10 weeks. It is 56.6% below that average now. Biotechnology: 15% of its 561 stocks in an uptrend (−17 points in four weeks); Health Care: 25% (−11 points in four weeks).

SEC filings

Statistics

Rotation: Not moving yet
Weeks in an uptrend: out for 10
Industry in uptrend: 15% -17 in 4 wk
Insider buys, 12 months: $0
Insider sales, 12 months: $0
Officials’ trades on record: 0
Institutions holding: 96 (+24)

In the rotation

Each square a week: lit when it closed above a rising 150-day average. 34 of 52 weeks.

17 Apr – 16 Oct

Biotechnology: Few of its stocks are in an uptrend and the share has fallen sharply over four weeks. Health Care: A minority of its stocks are in an uptrend and the share has fallen sharply over four weeks.

Money in and out

1 Nov 2024 – 1 Oct 2026

Open-market buys above the line and sales below, in dollars.

Congress and officials

No member of Congress or official has disclosed a trade in it.

Insiders

Buy orders, 12 months0

Sale orders, 12 months0

Buyers · sellers0 · 0

No open-market buy or sale by its insiders on record.

Lines filed since 2 January 2026, newest first; every insider’s older lines are on their own page.

Institutions

Holders96+24 on the quarter

New · exited40 · 18

Reported value$533.8M

Quarter to 30 Jun 2026, against 31 Mar 2026; newest filing 31 Aug 2026.

Manager	Shares	Change
PERCEPTIVE ADVISORS LLCadded · filed 14 Aug 2026	1,304,846$43.3M	+589,539+82.4%
BVF INCunchanged · filed 14 Aug 2026	1,251,788$41.6M	00.0%
Affinity Asset Advisors, LLCadded · filed 13 Aug 2026	1,172,487$38.9M	+102,968+9.6%
BlackRock, Inc.added · filed 7 Aug 2026	1,122,655$37.3M	+889,971+382.5%
SAMSARA BIOCAPITAL, LLCunchanged · filed 14 Aug 2026	1,062,872$35.3M	00.0%
Kynam Capital Management, LPunchanged · filed 14 Aug 2026	872,558$29.0M	00.0%
ORBIMED ADVISORS LLCreduced · filed 14 Aug 2026	743,944$24.7M	-57,200−7.1%
Balyasny Asset Management L.P.added · filed 14 Aug 2026	711,162$23.6M	+245,370+52.7%
VANGUARD CAPITAL MANAGEMENT LLCreduced · filed 13 Aug 2026	694,219$23.0M	-26,223−3.6%
EVENTIDE ASSET MANAGEMENT, LLCreduced · filed 14 Aug 2026	585,262$19.4M	-130,045−18.2%