8-K - Seres Therapeutics, Inc. (0001609809) (Filer)
Published . Updated .
8-K - Seres Therapeutics filed an 8-K with the SEC on Oct 26 (a notice of a material company event).
Directly affected
- MCRB Seres Therapeutics
Named in this report.
Indirectly affected
- XLV Health Care Select Sector SPDR
Health Care Select Sector SPDR holds the health sector that Seres Therapeutics belongs to, so it often moves with news about it.
- LLY Eli Lilly and+12.6% 30d
Eli Lilly and is a peer of Seres Therapeutics in pharmaceutical preparations; rivals often move on the same news.
- JNJ Johnson & Johnson+0.5% 30d
Johnson & Johnson is a peer of Seres Therapeutics in pharmaceutical preparations; rivals often move on the same news.
- ABBV AbbVie+9.1% 30d
AbbVie is a peer of Seres Therapeutics in pharmaceutical preparations; rivals often move on the same news.
- MRK Merck-2.1% 15d
Merck is a peer of Seres Therapeutics in pharmaceutical preparations; rivals often move on the same news.
- ABT Abbott Laboratories-2.0% 30d
Abbott Laboratories is a peer of Seres Therapeutics in pharmaceutical preparations; rivals often move on the same news.
Price reaction, T-5 to T+3
| Ticker | T-5 | T-3 | T-1 | T0 | T+1 | T+2 | T+3 |
|---|---|---|---|---|---|---|---|
| MCRB | +16.13% | +6.95% | base | -10.17% | after close | after close | after close |
| XLVNo price data for this ticker | — | — | — | — | — | — | — |
| LLYNo price data for this ticker | — | — | — | — | — | — | — |
| JNJNo price data for this ticker | — | — | — | — | — | — | — |
| ABBVNo price data for this ticker | — | — | — | — | — | — | — |
| MRKNo price data for this ticker | — | — | — | — | — | — | — |
| ABTNo price data for this ticker | — | — | — | — | — | — | — |
Closing-price change versus T-1, the last close before the story. T0 to T+3 fill in after each market close. Prices: Alpaca IEX.
Market Call
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Filed: 2026-10-26 AccNo: 0001193125-26-432004 Size: 136 KB Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
Source: sec-edgar
The price since 26 Oct 2026: Seres Therapeutics (MCRB) versus the S&P 500
| Company | When | Move | Status |
|---|---|---|---|
| Seres Therapeutics (MCRB) | that day | -10.17% | final price |
| Seres Therapeutics (MCRB) | three days earlier | +6.95% | final price |
| Seres Therapeutics (MCRB) | five days earlier | +16.13% | final price |
Trades by members of Congress and officials in the stocks in this story
- Rep. Rohit Khanna bought Eli Lilly (LLY) (held by a spouse), worth $1,001 - $15,000 on 4 Sep 2026. That is 52 days before publication. Filed 7 Oct 2026. View the filing.
- Rep. Rohit Khanna bought Johnson & Johnson (JNJ) (held by a spouse), worth $1,001 - $15,000 on 25 Sep 2026. That is 31 days before publication. Filed 7 Oct 2026. View the filing.
- Rep. Lloyd Doggett bought Johnson & Johnson (JNJ), worth $1,001 - $15,000 on 8 Sep 2026. That is 48 days before publication. Filed 5 Oct 2026. View the filing.
- Rep. Rohit Khanna bought Johnson & Johnson (JNJ) (held by a spouse), worth $1,001 - $15,000 on 4 Sep 2026. That is 52 days before publication. Filed 7 Oct 2026. View the filing.
- Rep. Pete Sessions sold AbbVie (ABBV), worth $15,001 - $50,000 on 14 Sep 2026. That is 42 days before publication. Filed 18 Sep 2026. View the filing.
- Rep. Rohit Khanna sold AbbVie (ABBV) (held by a spouse), worth $1,001 - $15,000 on 4 Sep 2026. That is 52 days before publication. Filed 7 Oct 2026. View the filing.
- Donald J Trump, an executive branch official, bought AbbVie (ABBV), worth $50,001 - $100,000 on 31 Jul 2026. That is 87 days before publication. Filed 22 Sep 2026. View the filing.
- Rep. Maria Elvira Salazar sold Merck (MRK), worth $1,001 - $15,000 on 24 Sep 2026. That is 32 days before publication. Filed 7 Oct 2026. View the filing.
- Rep. Maria Elvira Salazar bought Merck (MRK), worth $15,001 - $50,000 on 19 Aug 2026. That is 68 days before publication. Filed 9 Sep 2026. View the filing.
- Donald J Trump, an executive branch official, sold Merck (MRK), worth $250,001 - $500,000 on 31 Jul 2026. That is 87 days before publication. Filed 22 Sep 2026. View the filing.
- Rep. Gilbert Cisneros bought Abbott Laboratories (ABT), worth $1,001 - $15,000 on 18 Sep 2026. That is 38 days before publication. Filed 12 Oct 2026. View the filing.
- Rep. Rohit Khanna bought Abbott Laboratories (ABT) (held by a spouse), worth $1,001 - $15,000 on 4 Sep 2026. That is 52 days before publication. Filed 7 Oct 2026. View the filing.
Public disclosure filings, not a recommendation. The filing link is the source document. News use of these reports still sits under 5 U.S.C. § 13107(c).
Who is named in “8-K - Seres Therapeutics, Inc. (0001609809) (Filer)”
Companies carried with this story
- MCRB Seres Therapeutics
Seres Therapeutics (MCRB) is linked, with no stored direction, high confidence in the 26 Oct 2026 story “8-K - Seres Therapeutics, Inc. (0001609809) (Filer).” Reason on file: SEC 8-K filing -> direct issuer disclosure -> MCRB
How “8-K - Seres Therapeutics, Inc. (0001609809) (Filer)” reaches Seres Therapeutics (MCRB)
The 26 Oct 2026 story “8-K - Seres Therapeutics, Inc. (0001609809) (Filer)” names Seres Therapeutics (MCRB) because of this story.
What ties Seres Therapeutics (MCRB) to the headline is this: SEC 8-K filing -> direct issuer disclosure -> MCRB
The price range for Seres Therapeutics (MCRB), and the dates in the story
MCRB traded between 1.75 and 2.15 across 2 sessions. The latest close on file is 1.81.
How solid “8-K - Seres Therapeutics, Inc. (0001609809) (Filer)” looks
14 out of 100
“8-K - Seres Therapeutics, Inc. (0001609809) (Filer)” scores 14 out of 100. The score uses 1 sources, and 1 linked companies.