QUODD

Insider Transactions last 24 months for Seres Therapeutics, Inc. - NSDQ: MCRB

Transactions
All	Buy	Sell	Option Exercise

Filer's Name	Relationship/ Title	Trans. Date	Trans. Type	Ownership Type	Security Type	Shares	Price	Trans. Value	Total Shares Owned
Henn Matthew R	See Remarks	08/18/2025	DS	Direct	COM	73	$16.65	$1,215.45	4,548
Shaff Eric D.	Director	08/18/2025	DS	Direct	COM	217	$16.65	$3,613.05	10,609
Young Teresa L.	See Remarks	08/18/2025	DS	Direct	COM	59	$16.65	$982.35	5,215
Desrosier Thomas	See Remarks	08/18/2025	DS	Direct	COM	76	$16.65	$1,265.40	7,455
Henn Matthew R	See Remarks	08/15/2025	AM	Direct	COM	97	$0.00	$0.00	4,621
Henn Matthew R	See Remarks	08/15/2025	AM	Direct	COM	141	$0.00	$0.00	4,524
Shaff Eric D.	Director	08/15/2025	AM	Direct	COM	333	$0.00	$0.00	10,826
Shaff Eric D.	Director	08/15/2025	AM	Direct	COM	391	$0.00	$0.00	10,493
Young Teresa L.	See Remarks	08/15/2025	AM	Direct	COM	97	$0.00	$0.00	5,274
Young Teresa L.	See Remarks	08/15/2025	AM	Direct	COM	133	$0.00	$0.00	5,177
Desrosier Thomas	See Remarks	08/15/2025	AM	Direct	COM	111	$0.00	$0.00	7,531
Desrosier Thomas	See Remarks	08/15/2025	AM	Direct	COM	133	$0.00	$0.00	7,420
Henn Matthew R	See Remarks	05/16/2025	DS	Direct	COM	77	$7.28	$560.56	4,383
Shaff Eric D.	CEO and President	05/16/2025	DS	Direct	COM	220	$7.28	$1,601.60	10,102
Young Teresa L.	See Remarks	05/16/2025	DS	Direct	COM	63	$7.28	$458.64	5,044
Henn Matthew R	See Remarks	05/15/2025	AM	Direct	COM	98	$0.00	$0.00	4,460
Henn Matthew R	See Remarks	05/15/2025	AM	Direct	COM	140	$0.00	$0.00	4,362
Desrosier Thomas	Chief Legal Officer and EVP	05/15/2025	DS	Direct	COM	79	$7.28	$575.12	7,287
Desrosier Thomas	Chief Legal Officer and EVP	05/15/2025	AM	Direct	COM	111	$0.00	$0.00	7,366
Desrosier Thomas	Chief Legal Officer and EVP	05/15/2025	AM	Direct	COM	133	$0.00	$0.00	7,255
Shaff Eric D.	CEO and President	05/15/2025	AM	Direct	COM	331	$0.00	$0.00	10,322
Shaff Eric D.	CEO and President	05/15/2025	AM	Direct	COM	390	$0.00	$0.00	9,991
Young Teresa L.	See Remarks	05/15/2025	AM	Direct	COM	98	$0.00	$0.00	5,107
Young Teresa L.	See Remarks	05/15/2025	AM	Direct	COM	133	$0.00	$0.00	5,009
Von Moltke Lisa	See Remarks	02/18/2025	DS	Direct	COM	4,416	$0.81	$3,579.17	39,875

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Transaction Type Key First letter: A = Acquired, D = Disposed Second letter: A = Grant, award or other acquisition pursuant to Rule 16b-3(d) C = Conversion of derivative security \| D = Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) \| E = Expiration of short derivative position \| F = Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. \| G = Gift \| H = Expiration (or cancellation) of long derivative position with value received \| I = Discretionary transaction in accordance with Rule 16b-3(f) \| J = Other \| L = Small acquisition under Rule 16a-6 \| M = Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 \| O = Exercise of out-of-the-money derivative security \| P = Open market or private purchase \| S = Open market or private sale \| U = Disposition pursuant to a tender of shares in a change of control transaction \| W = Acquisition or disposition by will or the laws of descent and distribution \| X = Exercise of in-the-money or at-the-money derivative security \| Z = Deposit into or withdrawal from voting trust		Send to Excel

Transaction Type Key
First letter: A = Acquired, D = Disposed
Second letter:
A = Grant, award or other acquisition pursuant to Rule 16b-3(d) C = Conversion of derivative security | D = Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) | E = Expiration of short derivative position | F = Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. | G = Gift | H = Expiration (or cancellation) of long derivative position with value received | I = Discretionary transaction in accordance with Rule 16b-3(f) | J = Other | L = Small acquisition under Rule 16a-6 | M = Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | O = Exercise of out-of-the-money derivative security | P = Open market or private purchase | S = Open market or private sale | U = Disposition pursuant to a tender of shares in a change of control transaction | W = Acquisition or disposition by will or the laws of descent and distribution | X = Exercise of in-the-money or at-the-money derivative security | Z = Deposit into or withdrawal from voting trust

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