Seres Therapeutics Inc

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Seres Therapeutics Inc
TickerMCRB
CIK #0001609809
CUSIP81750R201
SectorLife Sciences - Pharmaceutical Preparations
Address215 First Street Suite 440, Cambridge, MA 02142
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Seres Health Inc 2015-01-05 65.0 M Exemption: 506(b) · Duration: One year or less · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0001609809] 10-K
[0001609809] 10-Q
[0001609809] 3
[0001609809] 4
[0001609809] 8-K
[0001609809] D
[0001609809] SC 13D
[0001609809] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
BlackRock Inc Seres Therapeutics Inc [2024-01-29] 5.7
BlackRock Inc Seres Therapeutics Inc [2023-02-03] 5.2
Federated Hermes Inc Seres Therapeutics Inc [2022-02-14] 7.53
Janus Henderson Group PLC Seres Therapeutics Inc [2022-02-11] 5.5
Vanguard Group Inc Seres Therapeutics Inc [2022-02-10] 5.09
State Street Corp Seres Therapeutics Inc [2021-10-12] 10.91
RA Capital Management LP Seres Therapeutics Inc [2021-05-05] 5.1
BlackRock Inc Seres Therapeutics Inc [2020-02-07] 5.7
Sumitomo Mitsui Trust Holdings Inc Seres Therapeutics Inc [2019-09-09] 10.15
Nikko Asset Management Americas Inc Seres Therapeutics Inc [2019-09-06] 10.15
Flagship Venturelabs IV LLC Seres Therapeutics Inc [2019-06-28] 3.91
Ark Investment Management LLC Seres Therapeutics Inc [2019-02-14] 10.08
BlackRock Inc Seres Therapeutics Inc [2019-02-08] 5.5
Nestle Health Science US Holdings Inc Seres Therapeutics Inc [2018-04-11] 16.97
Flagship Ventures Fund 2007 LP Seres Therapeutics Inc [2016-02-16] 1.53
FMR LLC Seres Therapeutics Inc [2015-09-10] 0.0
Nestle Health Science US Holdings Inc Seres Therapeutics Inc [2015-07-06] 17.7
Form 3/4/5 Filer 2011 - 2026
Seres Therapeutics Inc
Ausiello Dennis A
Berenson Stephen
Rosiello Robert L
Henn Matthew R
Shaff Eric D
Brady Kelly
DesRosier Thomas
Thorell Marella
Kender Richard N
Young Teresa L
Fraser Claire
Dere Willard H
Biondi Paul
Graves Kurt
von Moltke Lisa
Woerle Hans-Juergen
Societe des Produits Nestle SA
Nestle Sa
Ege David S
Arkowitz David
Cloghessy Paula
Behar Gregory
Flagship Pioneering Fund VII General Partner LLC
Flagship Pioneering Fund VII LP
Nutritional Health LTP Fund LP
Flagship Pioneering LLC
Afeyan Noubar
Nutritional Health LTP Fund General Partner LLC
Zausner Meryl
Chapman Marcus
Flagship Ventures Fund IV LP
Flagship Ventures Fund IV General Partner LLC
Flagship Pioneering Fund VI General Partner LLC
Flagship Pioneering Fund VI LP
Flagship Ventures Fund IV-RX LP
Aunins John G
Kim Lorence H
Pomerantz Roger
Horgan Kevin
Cook David N
Trucksis Michele
Hashad Wael
HUTT Peter Barton
Flagship Ventures 2007 General Partner LLC
Flagship VentureLabs IV LLC
Flagship Ventures Fund 2007 LP
Kania Edwin
Nestle Health Science US Holdings Inc
Nimco US Inc
Cautreels Werner
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Thorell Marella
Stock Option (right to buy) · derivative
2026-03-04 Grant 22,500 $0.00
Henn Matthew R
Stock Option (right to buy) · derivative
2026-03-04 Grant 75,000 $0.00
Kender Richard N
Stock Option (right to buy) · derivative
2026-03-04 Grant 150,000 $0.00
DesRosier Thomas
Stock Option (right to buy) · derivative
2026-03-04 Grant 22,500 $0.00
Brady Kelly
Stock Option (right to buy) · derivative
2026-03-04 Grant 56,250 $0.00
Young Teresa L
Restricted Stock Units · derivative
2026-02-15 Option exercise 98 $0.00
Henn Matthew R
Common Stock
2026-02-15 Option exercise 239
Henn Matthew R
Restricted Stock Units · derivative
2026-02-15 Option exercise 98 $0.00
Henn Matthew R
Restricted Stock Units · derivative
2026-02-15 Option exercise 141 $0.00
DesRosier Thomas
Restricted Stock Units · derivative
2026-02-15 Option exercise 133 $0.00
Shaff Eric D
Restricted Stock Units · derivative
2026-02-15 Option exercise 391 $0.00
Shaff Eric D
Common Stock
2026-02-15 Option exercise 723
DesRosier Thomas
Common Stock
2026-02-15 Sell 78 $8.47 661
Young Teresa L
Restricted Stock Units · derivative
2026-02-15 Option exercise 133 $0.00
DesRosier Thomas
Restricted Stock Units · derivative
2026-02-15 Option exercise 111 $0.00
DesRosier Thomas
Common Stock
2026-02-15 Option exercise 244
Shaff Eric D
Restricted Stock Units · derivative
2026-02-15 Option exercise 333 $0.00
Young Teresa L
Common Stock
2026-02-15 Option exercise 231
Shaff Eric D
Common Stock
2026-02-15 Sell 259 $8.47 2,194
Henn Matthew R
Common Stock
2026-02-15 Sell 89 $8.47 754
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 34 2,487,573
2025-12-31 38 2,742,209
2025-09-30 39 2,957,754
2025-06-30 35 2,418,980
2025-03-31 66 61,666,311
2024-12-31 71 66,260,208
2024-09-30 79 64,272,504
2024-06-30 95 69,717,485
2024-03-31 100 87,283,506
2023-12-31 105 89,225,339
2023-09-30 135 109,134,189
2023-06-30 140 112,085,840
Form 13F Holdings
Firm Period DFND Voting Shares
Rachor Investment Advisory Services LLC [2026-06-30] SOLE 0 1,477
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