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JZ

Jennifer Zachary

MRK
EVP, GENERAL COUNSEL · MERCK & CO., INC. · CIK 0001737231
FILING MIX · LIFETIME60%/40%
BUYS
38
SELLS
25
TOTAL VALUE
$97.53M
COMPANIES
2
ACTIVE SINCE
May 2020
HOLDINGS NOW
77,380
AVG SELL PX
$112.94
TRADE KIND
SHOWING 63 / 63
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
8 backtested trades · 8 horizons · 6 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Jennifer Zachary, 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
7d8+37.50%+1.47%-1.16%+2.62%+3.31%—
14d8+37.50%+1.85%+0.40%+1.45%+3.48%—
30d8+62.50%+1.69%+0.41%+1.28%+1.31%—
60d8+12.50%+5.24%+0.68%+4.56%+5.29%—
90d8+50.00%+0.61%+5.16%-4.55%-6.16%—
180d8+25.00%+4.85%+8.75%-3.90%-2.35%—
1y8(3 pending)+20.00%+5.56%+17.50%-11.94%-2.40%—
2y8(3 pending)+40.00%-2.60%+48.62%-51.22%-46.69%—
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
MRK · 45,509.254 shares · as of Aug 12, 2026
050,824101,648152,471203,295202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
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
2026
FLOW · 38 buys / 25 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
41,494$117.89$4.89M112,391.254Aug 12, 2026Aug 13, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
80,315$133.46$10.72M45,509.254Aug 12, 2026Aug 13, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
13,433——0Aug 12, 2026Aug 13, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
41,494——0Aug 12, 2026Aug 13, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
13,433$84.71$1.14M125,824.254Aug 12, 2026Aug 13, 2026 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
46,600——46,600May 29, 2026Jun 2, 2026 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
9,807——31,871May 29, 2026Jun 2, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
12,064——12,064May 5, 2026May 7, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
35,312——35,312May 5, 2026May 7, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
1,454$110.03$160.0K70,897.254Apr 29, 2026May 1, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
2,951$110.03$324.7K72,351.254Apr 29, 2026May 1, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
2,951——5,903Apr 29, 2026May 1, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
56,792$119.15$6.77M125,707.671Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
25,946$119.15$3.09M68,915.671Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
38,835$119.15$4.63M107,750.671Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
25,946$119.15$3.09M94,861.671Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
38,835——0Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
38,835$119.15$4.63M68,915.671Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
25,946——0Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
56,792$119.15$6.77M68,915.671Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
56,792——0Feb 9, 2026Feb 9, 2026 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
11,583$107.40$1.24M68,915.671Jan 26, 2026Jan 28, 2026 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
7,768——22,064May 30, 2025Jun 3, 2025 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
39,815——39,815May 30, 2025Jun 3, 2025 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
8,854——8,854Apr 29, 2025May 1, 2025 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
40,301——40,301Apr 29, 2025May 1, 2025 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
25,423$97.94$2.49M55,285.685Jan 27, 2025Jan 29, 2025 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
4,790——14,296May 31, 2024Jun 4, 2024 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
24,454——24,454May 31, 2024Jun 4, 2024 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
35,156——35,156Apr 30, 2024May 2, 2024 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
49,499$126.97$6.28M29,057.76Feb 2, 2024Feb 2, 2024 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
19,417——38,835Feb 2, 2024Feb 2, 2024 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
19,417$87.10$1.69M78,556.76Feb 2, 2024Feb 2, 2024 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
23,298$119.43$2.78M59,139.76Jan 22, 2024Jan 24, 2024 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
17,892——17,892Jun 2, 2023Jun 6, 2023 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
3,486——9,506Jun 2, 2023Jun 6, 2023 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
19,141$117.59$2.25M35,127.593May 4, 2023May 5, 2023 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
41,494——41,494May 2, 2023May 4, 2023 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
75,436——0Feb 3, 2023Feb 6, 2023 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
75,436$103.17$7.78M53,919.941Feb 3, 2023Feb 6, 2023 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
75,436$56.04$4.23M129,355.941Feb 3, 2023Feb 6, 2023 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
15,631$109.88$1.72M53,919.941Jan 23, 2023Jan 25, 2023 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
28,396——56,792Oct 28, 2022Nov 1, 2022 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
99,768$99.07$9.88M103,527.302Oct 28, 2022Nov 1, 2022 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
51,884——25,946Oct 28, 2022Nov 1, 2022 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
65,487$99.85$6.54M38,040.302Oct 28, 2022Nov 1, 2022 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
28,396——203,295.302Oct 28, 2022Nov 1, 2022 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
68,367——123,015.302Oct 28, 2022Nov 1, 2022 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
68,367——0Oct 28, 2022Nov 1, 2022 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
51,884——174,899.302Oct 28, 2022Nov 1, 2022 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
6,020——6,020Jun 3, 2022Jun 7, 2022 ↗View →
RGNX
REGENXBIO INC.
PURCHASEGRANT
Stock grant
29,739——29,739Jun 3, 2022Jun 7, 2022 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
58,252——58,252May 3, 2022May 5, 2022 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
18,420$73.51$1.35M53,419.167Feb 24, 2022Feb 28, 2022 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
82,653——82,653May 4, 2021May 6, 2021 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
5,772——0May 4, 2021May 6, 2021 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
5,772$75.98$438.6K36,983.931May 4, 2021May 6, 2021 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
2,843$75.98$216.0K34,140.931May 4, 2021May 6, 2021 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
24,199$72.62$1.76M30,947.115Feb 26, 2021Mar 2, 2021 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
5,772——5,772May 4, 2020May 6, 2020 ↗View →
MRK
MERCK & CO., INC.
PURCHASE
EVP, General Counsel
5,772$77.67$448.3K9,489.498May 4, 2020May 6, 2020 ↗View →
MRK
MERCK & CO., INC.
SALE
EVP, General Counsel
2,843$77.67$220.8K6,646.498May 4, 2020May 6, 2020 ↗View →
MRK
MERCK & CO., INC.
PURCHASEGRANT
Stock grant
75,514——75,514May 1, 2020May 5, 2020 ↗View →
Other insiders · MRK
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About this filer
CIK 0001737231
ROLE
EVP, General Counsel
PRIMARY
MRK
COMPANIES
2
ACTIVE SINCE
May 2020
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