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Company

Seres Therapeutics, Inc.

MCRB · CIK 0001609809

SEC FORM 4
$373.10

Seres Therapeutics, Inc. (MCRB)

Sale of 82 shares at $4.55 per share.

Reporting Person DesRosier Thomas · Officer Title See Remarks · Transaction Code S

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355712 · filed 2026-08-18 · View filing →

SEC FORM 4
$368.55

Seres Therapeutics, Inc. (MCRB)

Sale of 81 shares at $4.55 per share.

Reporting Person Henn Matthew R · Officer Title See Remarks · Transaction Code S

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355718 · filed 2026-08-18 · View filing →

SEC FORM 4
$1,196.65

Seres Therapeutics, Inc. (MCRB)

Sale of 263 shares at $4.55 per share.

Reporting Person Shaff Eric D. · Transaction Code S

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355722 · filed 2026-08-18 · View filing →

SEC FORM 4
$291.20

Seres Therapeutics, Inc. (MCRB)

Sale of 64 shares at $4.55 per share.

Reporting Person Brady Kelly · Officer Title See Remarks · Transaction Code S

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355734 · filed 2026-08-18 · View filing →

SEC FORM 4
—

Seres Therapeutics, Inc. (MCRB)

Acquisition (code M) of 245 shares; price not stated (see filing).

Reporting Person DesRosier Thomas · Officer Title See Remarks · Transaction Code M

Traded Aug 15, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355712 · filed 2026-08-18 · View filing →

SEC FORM 4
—

Seres Therapeutics, Inc. (MCRB)

Acquisition (code M) of 238 shares; price not stated (see filing).

Reporting Person Henn Matthew R · Officer Title See Remarks · Transaction Code M

Traded Aug 15, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355718 · filed 2026-08-18 · View filing →

SEC FORM 4
—

Seres Therapeutics, Inc. (MCRB)

Acquisition (code M) of 722 shares; price not stated (see filing).

Reporting Person Shaff Eric D. · Transaction Code M

Traded Aug 15, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355722 · filed 2026-08-18 · View filing →

SEC FORM 4
—

Seres Therapeutics, Inc. (MCRB)

Acquisition (code M) of 181 shares; price not stated (see filing).

Reporting Person Brady Kelly · Officer Title See Remarks · Transaction Code M

Traded Aug 15, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355734 · filed 2026-08-18 · View filing →