NASDAQ: STRO
Sutro Biopharma Inc Stock Ownership - Who owns Sutro Biopharma?

Insider buying vs selling

Have Sutro Biopharma Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Jane ChungChief Executive Officer2026-03-04282$21.31
$6.01kSell
David PaulingChief Admin. Ofcr. GC2026-03-04277$21.31
$5.90kSell
Hanspeter GerberCHIEF SCIENTIFIC OFFICER2026-03-021,170$20.55
$24.04kSell
David PaulingChief Admin. Ofcr. GC2026-03-02970$20.55
$19.93kSell
Jane ChungChief Executive Officer2026-03-022,779$20.55
$57.11kSell
Hanspeter GerberCHIEF SCIENTIFIC OFFICER2026-03-01463$20.47
$9.48kSell
Jane ChungChief Executive Officer2026-03-011,271$20.47
$26.02kSell
David PaulingChief Admin. Ofcr. GC2026-03-01551$20.47
$11.28kSell
Jane ChungChief Executive Officer2025-12-12894$8.02
$7.17kSell
Hanspeter GerberCHIEF SCIENTIFIC OFFICER2025-10-1517,000$0.80
$13.60kBuy

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Net Insider Buy/Sell (L12M) Ownership

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STRO Shareholders

What type of owners hold Sutro Biopharma Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Merck Co Inc16.43%2,723,509$42.16MInsider
Skyline Venture Partners V LP11.82%1,960,053$30.34MInsider
Daniel Janney11.73%1,944,901$30.11MInsider
Alta Partners VIII LP11.73%1,944,901$30.11MInsider
Svlsf V LLC11.00%1,824,542$28.24MInsider
Michael Jay Ross11.00%1,824,542$28.24MInsider
Celgene Corp10.41%1,726,197$26.72MInsider
William J. Newell2.82%466,878$7.23MInsider
Edward C. Albini0.97%160,805$2.49MInsider
Linda A. Fitzpatrick0.91%150,893$2.34MInsider

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STRO vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
STRO0.10%92.06%Net Buying
AKBA0.04%8.06%Net SellingNet Buying
BCYC0.05%43.51%Net SellingNet Selling
LCTX0.05%60.39%Net Selling
TRDA0.06%99.94%Net SellingNet Selling

Sutro Biopharma Stock Ownership FAQ

Who owns Sutro Biopharma?

Sutro Biopharma (NASDAQ: STRO) is owned by 0.10% institutional shareholders, 92.06% Sutro Biopharma insiders, and 7.84% retail investors. Merck Co Inc is the largest individual Sutro Biopharma shareholder, owning 2.72M shares representing 16.43% of the company. Merck Co Inc's Sutro Biopharma shares are currently valued at $41.78M.

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