MarketPeel
Insider Trading Intelligence
MM

Michael A. Metzger

SNDX
CHIEF EXECUTIVE OFFICER · SYNDAX PHARMACEUTICALS INC · CIK 0001507220
FILING MIX · LIFETIME45%/55%
BUYS
49
SELLS
59
TOTAL VALUE
$56.49M
COMPANIES
2
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
530,710
AVG SELL PX
$19.42
TRADE KIND
SHOWING 108 / 108
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
32 backtested trades · 8 horizons · 12 pending
Forward-return performance of every backtestable P/S trade by Michael A. Metzger, 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
7d32+53.13%+1.25%+0.27%+0.98%-0.78%0.77
14d32+46.88%+1.69%+1.11%+0.58%-0.89%0.38
30d32+56.25%+1.11%+1.58%-0.47%-3.94%-0.16
60d32+59.38%-0.70%+1.51%-2.21%-10.67%-0.68
90d32+50.00%+0.02%+1.70%-1.68%-3.82%-0.53
180d32(2 pending)+76.67%-2.82%+0.94%-3.75%-7.23%-0.67
1y32(4 pending)+28.57%+5.74%+3.12%+2.62%+27.16%
2y32(6 pending)+61.54%-7.71%+20.79%-28.50%-17.01%
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
SNDX · 484,843 shares · as of Jun 1, 2026
0129,065258,131387,196516,261202120222023202420252026SHARES 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 · 49 buys / 59 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
6,847$18.99$130.0K484,843Jun 1, 2026Jun 2, 2026View →
PYXS
PYXIS ONCOLOGY, INC.
PURCHASEGRANT
Stock grant
45,86745,867Mar 24, 2026Mar 25, 2026View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
17,159$21.03$360.8K491,690Feb 9, 2026Feb 10, 2026View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
7,412$20.62$152.8K508,849Feb 6, 2026Feb 6, 2026View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
144,600516,261Feb 4, 2026Feb 6, 2026View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
73,000371,661Feb 4, 2026Feb 6, 2026View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
440,000$20.43$8.99M440,000Feb 4, 2026Feb 6, 2026View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
157,307$10.90$1.71M455,968Sep 8, 2025Sep 8, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE10b5-1
10b5-1 plan
157,307$16.41$2.58M298,661Sep 8, 2025Sep 8, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
157,3070Sep 8, 2025Sep 8, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
7,534$9.29$70.0K298,661Jul 16, 2025Jul 18, 2025View →
PYXS
PYXIS ONCOLOGY, INC.
PURCHASEGRANT
Stock grant
36,979$0.98$36.2K36,979Mar 31, 2025Apr 2, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
6,0740Mar 14, 2025Mar 17, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
6,074$7.20$43.7K306,195Mar 14, 2025Mar 17, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
7,814$7.20$56.3K307,935Mar 4, 2025Mar 6, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE10b5-1
10b5-1 plan
7,814$15.05$117.6K300,121Mar 4, 2025Mar 6, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
7,8140Mar 4, 2025Mar 6, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
13,288$15.50$206.0K300,121Feb 10, 2025Feb 12, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
364,000$14.65$5.33M364,000Feb 5, 2025Feb 7, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
60,500224,409Feb 5, 2025Feb 7, 2025View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
89,000313,409Feb 5, 2025Feb 7, 2025View →
PYXS
PYXIS ONCOLOGY, INC.
PURCHASEGRANT
Stock grant
70,68370,683Jun 10, 2024Jun 10, 2024View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
39,000163,909Feb 7, 2024Feb 9, 2024View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
214,500$22.28$4.78M214,500Feb 7, 2024Feb 9, 2024View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
107,250124,909Feb 7, 2024Feb 9, 2024View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
5,959$6.38$38.0K23,618Feb 6, 2023Feb 8, 2023View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
5,959$27.64$164.7K17,659Feb 6, 2023Feb 8, 2023View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
5,959$27.64$164.7K0Feb 6, 2023Feb 8, 2023View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
410,000$28.55$11.71M410,000Feb 2, 2023Feb 3, 2023View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
16,2310Oct 6, 2022Oct 7, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
16,231$25.29$410.5K17,659Oct 6, 2022Oct 7, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
16,231$8.77$142.3K33,890Oct 6, 2022Oct 7, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
1,280$8.77$11.2K18,939Oct 4, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
1,2800Oct 4, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
1,280$25.02$32.0K17,659Oct 4, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
2,883$25.01$72.1K17,659Oct 3, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
2,883$8.77$25.3K20,542Oct 3, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
2,8830Oct 3, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
29,606$25.02$740.8K17,659Sep 30, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
29,6060Sep 30, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
29,606$8.77$259.6K47,265Sep 30, 2022Oct 4, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
19,764$21.06$416.1K17,659Jul 25, 2022Jul 27, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
11,838$21.06$249.3K17,659Jul 25, 2022Jul 27, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
19,764$6.38$126.1K37,423Jul 25, 2022Jul 27, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
11,8380Jul 25, 2022Jul 27, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
19,7640Jul 25, 2022Jul 27, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
11,838$6.38$75.5K29,497Jul 25, 2022Jul 27, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
100$21.00$2.1K17,659Jul 7, 2022Jul 8, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
100$6.38$63817,759Jul 7, 2022Jul 8, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
1000Jul 7, 2022Jul 8, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
Chief Executive Officer
15,009$6.38$95.8K32,668Jul 6, 2022Jul 8, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
15,009$21.07$316.3K17,659Jul 6, 2022Jul 8, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
Chief Executive Officer
15,0090Jul 6, 2022Jul 8, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
325,000$15.79$5.13M325,000Feb 2, 2022Feb 3, 2022View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
16,000$20.29$324.6K17,659Dec 20, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
45,000$20.29$913.0K17,659Dec 20, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
45,000$8.77$394.6K62,659Dec 20, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
16,000$6.38$102.1K33,659Dec 20, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
16,0000Dec 20, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
45,0000Dec 20, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
1,676$6.38$10.7K19,335Dec 17, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
1,6760Dec 17, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
1,676$19.02$31.9K17,659Dec 17, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
22,715$19.08$433.4K17,659Dec 16, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
22,7150Dec 16, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
22,715$6.38$144.9K40,374Dec 16, 2021Dec 20, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
34,564$6.38$220.5K52,223Dec 13, 2021Dec 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
2,045$19.05$39.0K17,659Dec 13, 2021Dec 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
2,045$7.20$14.7K19,704Dec 13, 2021Dec 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
2,0450Dec 13, 2021Dec 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
34,564$19.05$658.6K17,659Dec 13, 2021Dec 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
34,5640Dec 13, 2021Dec 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
16,296$7.20$117.3K33,955Oct 26, 2021Oct 27, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
16,2960Oct 26, 2021Oct 27, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
16,296$19.20$312.8K17,659Oct 26, 2021Oct 27, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
44,704$7.20$321.9K62,363Oct 25, 2021Oct 27, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
44,704$19.13$855.3K17,659Oct 25, 2021Oct 27, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
44,7040Oct 25, 2021Oct 27, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
24,437$19.51$476.8K17,659Sep 27, 2021Sep 28, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
24,4370Sep 27, 2021Sep 28, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
24,437$7.20$175.9K42,096Sep 27, 2021Sep 28, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
300$19.02$5.7K17,659Sep 22, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
300$7.20$2.2K17,959Sep 22, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
3000Sep 22, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
4,8080Sep 21, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
4,808$19.16$92.1K17,659Sep 21, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
4,808$7.20$34.6K22,467Sep 21, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
31,455$19.24$605.0K17,659Sep 20, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
31,455$7.20$226.5K49,114Sep 20, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
31,4550Sep 20, 2021Sep 22, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
44,349$19.15$849.4K17,659Sep 14, 2021Sep 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
44,3490Sep 14, 2021Sep 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
44,349$7.20$319.3K62,008Sep 14, 2021Sep 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
16,6510Sep 13, 2021Sep 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
16,651$19.02$316.6K17,659Sep 13, 2021Sep 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
16,651$7.20$119.9K34,310Sep 13, 2021Sep 15, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
160,000160,000Feb 3, 2021Feb 5, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
15,000$20.19$302.8K17,659Feb 1, 2021Feb 3, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
15,000$7.20$108.0K32,659Feb 1, 2021Feb 3, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
15,0000Feb 1, 2021Feb 3, 2021View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
15,000$7.20$108.0K32,659Dec 1, 2020Dec 3, 2020View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
15,0000Dec 1, 2020Dec 3, 2020View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
15,000$22.97$344.5K17,659Dec 1, 2020Dec 3, 2020View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
100,0000Nov 4, 2020Nov 6, 2020View →
SNDX
SYNDAX PHARMACEUTICALS INC
SALE
President and COO
100,000$20.31$2.03M17,659Nov 4, 2020Nov 6, 2020View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASE
President and COO
100,000$7.20$720.0K117,659Nov 4, 2020Nov 6, 2020View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
15,00017,659Feb 12, 2020Feb 14, 2020View →
SNDX
SYNDAX PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
140,000140,000Feb 12, 2020Feb 14, 2020View →
Other insiders · SNDX
Loading peer insiders…
About this filer
CIK 0001507220
ROLE
Chief Executive Officer
PRIMARY
SNDX
COMPANIES
2
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001507220DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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