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	02/15/2026	DS	Direct	COM	89	$8.47	$753.83	7,677
Henn Matthew R	See Remarks	02/15/2026	AM	Direct	COM	239	$0.00	$0.00	7,766
Desrosier Thomas	See Remarks	02/15/2026	DS	Direct	COM	78	$8.47	$660.66	7,789
Desrosier Thomas	See Remarks	02/15/2026	AM	Direct	COM	244	$0.00	$0.00	7,867
Shaff Eric D.	Director	02/15/2026	DS	Direct	COM	259	$8.47	$2,193.73	11,577
Shaff Eric D.	Director	02/15/2026	AM	Direct	COM	723	$0.00	$0.00	11,836
Young Teresa L.	See Remarks	02/15/2026	DS	Direct	COM	75	$8.47	$635.25	8,557
Young Teresa L.	See Remarks	02/15/2026	AM	Direct	COM	231	$0.00	$0.00	8,632
Henn Matthew R	See Remarks	11/15/2025	DS	Direct	COM	1,257	$17.30	$21,746.10	7,527
Henn Matthew R	See Remarks	11/15/2025	AM	Direct	COM	98	$0.00	$0.00	8,784
Henn Matthew R	See Remarks	11/15/2025	AM	Direct	COM	140	$0.00	$0.00	8,686
Henn Matthew R	See Remarks	11/15/2025	AM	Direct	COM	3,998	$0.00	$0.00	8,546
Shaff Eric D.	Director	11/15/2025	DS	Direct	COM	217	$17.30	$3,754.10	11,113
Shaff Eric D.	Director	11/15/2025	AM	Direct	COM	331	$0.00	$0.00	11,330
Shaff Eric D.	Director	11/15/2025	AM	Direct	COM	390	$0.00	$0.00	10,999
Young Teresa L.	See Remarks	11/15/2025	DS	Direct	COM	1,042	$17.30	$18,026.60	8,401
Young Teresa L.	See Remarks	11/15/2025	AM	Direct	COM	98	$0.00	$0.00	9,443
Young Teresa L.	See Remarks	11/15/2025	AM	Direct	COM	132	$0.00	$0.00	9,345
Young Teresa L.	See Remarks	11/15/2025	AM	Direct	COM	3,998	$0.00	$0.00	9,213
Desrosier Thomas	See Remarks	11/15/2025	DS	Direct	COM	76	$17.30	$1,314.80	7,623
Desrosier Thomas	See Remarks	11/15/2025	AM	Direct	COM	112	$0.00	$0.00	7,699
Desrosier Thomas	See Remarks	11/15/2025	AM	Direct	COM	132	$0.00	$0.00	7,587
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

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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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