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Insider Trading Intelligence
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MH

Matthew R. Henn

MCRB
SEE REMARKS · SERES THERAPEUTICS, INC. · CIK 0001767321
FILING MIX · LIFETIME49%/51%
BUYS
36
SELLS
38
TOTAL VALUE
$3.12M
COMPANIES
1
ACTIVE SINCE
Jan 2020
HOLDINGS NOW
7,838
AVG SELL PX
$22.52
TRADE KIND
SHOWING 74 / 74
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
14 backtested trades · 8 horizons · 12 pending
Forward-return performance of every backtestable P/S trade by Matthew R. Henn, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d14+57.14%+2.93%+0.27%+2.66%-2.30%—
14d14+64.29%+2.08%+0.98%+1.11%-3.37%—
30d14+64.29%-0.58%+1.64%-2.22%-5.14%—
60d14+57.14%+3.75%+2.61%+1.14%-8.81%—
90d14+71.43%-2.62%+5.93%-8.55%-24.07%—
180d14(1 pending)+84.62%-15.31%+10.53%-25.84%-35.51%—
1y14(3 pending)+72.73%-20.43%+21.77%-42.20%-63.06%—
2y14(8 pending)+100.00%-63.93%+32.17%-96.10%-93.79%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
MCRB · 7,838 shares · as of May 18, 2026
0162,500325,000487,500650,000202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 36 buys / 38 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
77$7.53$5807,838May 18, 2026May 19, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
97——683May 15, 2026May 19, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
141——422May 15, 2026May 19, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
238——7,915May 15, 2026May 19, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
75,000——75,000Mar 4, 2026Mar 6, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
89$8.47$7547,677Feb 15, 2026Feb 18, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
239——7,766Feb 15, 2026Feb 18, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
141——563Feb 15, 2026Feb 18, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
98——780Feb 15, 2026Feb 18, 2026 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
140——8,686Nov 15, 2025Nov 18, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
3,998——8,546Nov 15, 2025Nov 18, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
98——8,784Nov 15, 2025Nov 18, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
98——878Nov 15, 2025Nov 18, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
3,998——0Nov 15, 2025Nov 18, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
140——704Nov 15, 2025Nov 18, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
1,257$17.30$21.7K7,527Nov 15, 2025Nov 18, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
3,998——3,998Sep 26, 2025Sep 30, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
73$16.65$1.2K4,548Aug 18, 2025Aug 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
97——976Aug 15, 2025Aug 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
141——4,524Aug 15, 2025Aug 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
97——4,621Aug 15, 2025Aug 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
141——844Aug 15, 2025Aug 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
77$7.28$5614,383May 16, 2025May 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
140——4,362May 15, 2025May 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
140——985May 15, 2025May 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
98——4,460May 15, 2025May 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
98——1,073May 15, 2025May 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
3,953$0.81$3.2K84,443Feb 18, 2025Feb 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
7,813——23,437Feb 15, 2025Feb 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
7,813——88,396Feb 15, 2025Feb 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
2,813——80,583Feb 15, 2025Feb 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
2,813——22,500Feb 15, 2025Feb 19, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
650,000——650,000Feb 7, 2025Feb 11, 2025 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
927$0.54$50177,770Nov 18, 2024Nov 19, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
2,812——25,313Nov 15, 2024Nov 19, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
2,812——78,697Nov 15, 2024Nov 19, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
3,984$0.69$2.7K75,885Oct 28, 2024Oct 29, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
12,622——0Oct 27, 2024Oct 29, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
12,622——79,869Oct 27, 2024Oct 29, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
923$0.84$77567,247Aug 16, 2024Aug 19, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
2,813——68,170Aug 15, 2024Aug 19, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
2,813——28,125Aug 15, 2024Aug 19, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
2,812——66,248May 15, 2024May 17, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
2,812——30,938May 15, 2024May 17, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
891$0.94$83865,357May 15, 2024May 17, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
4,170$1.08$4.5K63,436Feb 16, 2024Feb 16, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
11,250——33,750Feb 15, 2024Feb 16, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
11,250——67,606Feb 15, 2024Feb 16, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
31,250——31,250Feb 14, 2024Feb 16, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
287,905——287,905Feb 14, 2024Feb 16, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
187,500——187,500Feb 14, 2024Feb 16, 2024 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
3,886$1.35$5.2K56,356Oct 30, 2023Oct 31, 2023 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
12,623——60,242Oct 27, 2023Oct 31, 2023 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
12,623——12,622Oct 27, 2023Oct 31, 2023 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
35,000——70,000Apr 27, 2023May 1, 2023 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
25,245——25,245Apr 27, 2023Oct 31, 2023 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
90,000——90,000Feb 3, 2023Feb 7, 2023 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
45,000——45,000Feb 3, 2023Feb 7, 2023 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
35,000——35,000Sep 8, 2022Sep 9, 2022 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
47,619$3.15$150.0K47,619Jul 5, 2022Jul 6, 2022 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
175,000——175,000Feb 4, 2022Feb 8, 2022 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
130,000——130,000Feb 4, 2021Feb 8, 2021 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
27,562——45,938Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
26,000$0.71$18.5K38,000Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
26,250$9.89$259.6K64,250Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
9,841$28.34$278.9K0Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
55,706$26.56$1.48M36,106Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
26,000——0Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
26,265$27.56$723.9K9,841Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
27,562$6.01$165.6K91,812Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
26,250——3,750Dec 1, 2020Dec 3, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
300,000——300,000Jan 29, 2020Jan 31, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
SALE
See Remarks
7,500——0Jan 26, 2020Jan 28, 2020 ↗View →
MCRB
SERES THERAPEUTICS, INC.
PURCHASE
See Remarks
7,500——12,000Jan 26, 2020Jan 28, 2020 ↗View →
Other insiders · MCRB
Loading peer insiders…
About this filer
CIK 0001767321
ROLE
See Remarks
PRIMARY
MCRB
COMPANIES
1
ACTIVE SINCE
Jan 2020
MARKETPEEL · /INSIDER/0001767321DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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