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STRO · Sutro Biopharma, Inc.

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TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475

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STRO

Name: SUTRO BIOPHARMA, INC. (STRO) insider trading and ownership data
Creator: WaveMan
License: https://wave-man.com/terms

SUTRO BIOPHARMA, INC.

PHARMA & BIOTECH · BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES) · CIK 0001382101

SEC FILINGS☆ WATCH

INSIDER NET · 180D

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

13F, latest reported quarter

REVENUE GROWTH

+65.2%

XBRL, annual

NET MARGIN

-186.5%

CONVERSIONS · 180D

codes C/M, not in net · $0 priced

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

no Form 4 purchases or sales on file

CONGRESS

no member of Congress has reported trading it

FUNDS

64 funds added or opened last quarter

more than 50% of Pharma & Biotech

REVENUE

+65.2% year over year

more than 82% of Pharma & Biotech

MARGIN

-186.5% net margin

below 71% of Pharma & Biotech

BUYBACKS

no share repurchases reported

SHORT

no short interest reported

THE SITUATION · EVERY LINE IS ONE RULE OVER ONE DATASET

64 funds added or opened positions in the latest 13F quarter, of 102 holders.

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN +115.5%

+115.5%12M

INSIDER BUY

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

The complete filing record, in one place.

The record shows 64 funds added last quarter. Every figure is a federal filing, dated the day it became public.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

UTHR CPIX MRNA REGN LLY ALNY ELF CITR MDGL DNA VRTX NUVL

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

No insider purchases or sales are on record for SUTRO BIOPHARMA, INC. in the period covered. Source: SEC Form 4 filings, as of 2026-09-04.

INSIDER

FILED

VALUE

Gerber Hans-Peter

CHIEF SCIENTIFIC OFFICER

BUY

2025-10-15

17,000.0

$13.6K

Chow Gregory K.

CFO

BUY

2025-10-15

19,750.0

$16.0K

Chung Jane

Chief Executive Officer

BUY

2025-10-15

12,500.0

$10.0K

MATSUI CONNIE

Director

BUY

2025-10-15

50,000.0

$40.0K

Pauling David

Chief Admin. Ofcr. & GC

BUY

2025-10-15

12,504.0

$10.0K

10 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 5 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders

13F · holdings as of the latest quarter funds have reported

PERCEPTIVE ADVISORS LLC

1,304,846.0 sh

$43.3M

BVF INC/IL

1,251,788.0 sh

$41.6M

Affinity Asset Advisors, LLC

1,172,487.0 sh

$38.9M

BlackRock, Inc.

1,122,655.0 sh

$37.3M

SAMSARA BIOCAPITAL, LLC

1,062,872.0 sh

$35.3M

SCHEDULE 13D/G

No 5%+ ownership filings

Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.

FORM 144

No planned-sale notices

No insider has notified an intent to sell. This is the panel to watch after a run-up.

Fund concentration

N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show

Eventide Healthcare & Life Sciences Fund

$17.8M POSITION · AS OF 2026-03-31

1.1%

Ultra-Small Company Market Fund

$74.7K POSITION · AS OF 2026-03-31

0.1%

iShares Micro-Cap ETF

$517.1K POSITION · AS OF 2026-03-31

0.0%

Invesco RAFI US 1500 Small-Mid ETF

$628.3K POSITION · AS OF 2026-04-30

0.0%

1290 VT Micro Cap Portfolio

$36.9K POSITION · AS OF 2026-03-31

0.0%

VANGUARD EXTENDED MARKET INDEX FUND

$4.2M POSITION · AS OF 2026-03-31

0.0%

SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK

Clinical pipeline

ClinicalTrials.gov · 7 registered trials, 1 still enrolling or running — a status change here is dated weeks before the press release

Phase 1

1 ACTIVE

Phase 2

0 ACTIVE

Multi-phase

0 ACTIVE

TRIALS MATCHED TO THIS TICKER BY SPONSOR NAME · STUDIES RUN UNDER A SUBSIDIARY'S OWN NAME ARE NOT INCLUDED

Executive pay vs shareholder return

DEF 14A pay-versus-performance disclosure · both the headline pay and the SEC's mark-to-market figure, beside the return the company delivered and the return of the peer group it chose itself

CEO TOTAL

ACTUALLY PAID

OTHER NEOs AVG

TSR

PEER TSR

2022

$3.0M

-$307.0K

$1.5M

-63%

—

2021

$5.6M

$1.6M

$3.1M

-31%

—

TAGGED BY THE COMPANY UNDER SEC ITEM 402(v) · RETURN IS CUMULATIVE FROM THE START OF THE DISCLOSURE PERIOD · GREEN WHERE THE COMPANY BEAT ITS OWN PEER GROUP

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2025-12	2024-12	2023-12	2022-12
REVENUE	$102.5M	$62.0M	$153.7M	$67.8M
OPERATING INCOME	$-158.4M	$-238.5M	$-89.3M	$-128.9M
NET INCOME	$-191.0M	$-227.0M	$-107.0M	$-119.2M
EPS (DILUTED)	-22.49	-29.40	-1.78	-2.35
OPERATING CASH FLOW	$-177.2M	$-191.5M	$-111.6M	$3.5M
CASH	$58.1M	$190.3M	$69.3M	$47.3M
LONG-TERM DEBT	—	—	$0	$3.8M

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-04 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE