Topper James N

USNatural personDirector

Transactions

1,097

Issuers

Buys / Sells

952/4

Last tx

19 May 2026

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Insider

Topper James N

USNatural personDirector3 companies · 24mo

Transactions

1,097

Issuers

Buys / Sells

952/4

Last tx

19 May 2026

Behaviour

4 purchases reported after at least 12 months of silence — most recent on 26 Mar 2024.

Current positions

Holdings derived from the most recent reported transactions. Not adjusted for stock splits or share-class conversions.

Issuer	Shares	Source	Last tx	Detail
ProNAi Therapeutics Inc	5,925,926	reported	14 Feb 2017	tx 6+8,150,956−1,869,606
Mirum Pharmaceuticals, Inc.	3,566,912	reported	22 Jul 2019	tx 3+3,566,912−24,935,300
Aptinyx Inc.	3,195,055	reported	31 Mar 2020	tx 13+3,255,092−83,864,275
NewAmsterdam Pharma Co N.V.	3,028,524	reported	15 Sept 2025	tx 9+28,324

Track record

Average stock performance after each discretionary buy, measured at 1, 3 and 6 months. 16 buys in history.

1 month

+29.9%

Sample16

Win rate (≥5%)75%

Hit rate (>0)75%

3 months

+49.6%

Sample16

Win rate (≥5%)75%

Hit rate (>0)75%

6 months

+98.2%

Sample16

Win rate (≥5%)88%

Hit rate (>0)94%

Recent transactions

Date	Type	Issuer	Qty	Price	Signals
19 May 2026	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	24,122	0.00 USD
15 Sept 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	660	23.70 USD
17 Sept 2025	TENDER	HilleVax, Inc.	8,535,337	1.95 USD
17 Sept 2025	TENDER	HilleVax, Inc.	17,199	1.95 USD
08 Sept 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	1,260	24.99 USD
11 Aug 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	471	23.98 USD
24 Jun 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	2,520	18.43 USD
25 Jun 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	1,260	18.26 USD
16 Jun 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	8,584	19.50 USD
03 Jun 2025	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	10,500	0.00 USD
03 Jun 2025	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	17,500	0.00 USD	deriv
21 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	3,780	3.86 USD
13 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	1,120	3.16 USD
14 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	6,300	3.32 USD
09 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	2,226	3.62 USD
12 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	12,601	3.04 USD
09 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	33,376	3.19 USD
26 Mar 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	1,135	22.49 USD
04 Mar 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	4,005	21.02 USD
23 May 2024	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	10,500	0.00 USD
23 May 2024	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	17,500	0.00 USD	deriv
18 May 2024	TENDER	Nivalis Therapeutics, Inc.	2,829,347	—
20 May 2024	OTHER	Nivalis Therapeutics, Inc.	7,650	—	deriv
20 May 2024	OTHER	Nivalis Therapeutics, Inc.	7,650	—	deriv
20 May 2024	OTHER	Nivalis Therapeutics, Inc.	7,650	—	deriv

Track record

Average stock performance after each discretionary buy, measured at 1, 3 and 6 months. 16 buys in history.

1 month

+29.9%

Sample16

Win rate (≥5%)75%

Hit rate (>0)75%

3 months

+49.6%

Sample16

Win rate (≥5%)75%

Hit rate (>0)75%

6 months

+98.2%

Sample16

Win rate (≥5%)88%

Hit rate (>0)94%

Current positions

Holdings derived from the most recent reported transactions. Not adjusted for stock splits or share-class conversions.

Issuer	Shares	Source	Last tx	Detail
ProNAi Therapeutics Inc	5,925,926	reported	14 Feb 2017	tx 6+8,150,956−1,869,606
Mirum Pharmaceuticals, Inc.	3,566,912	reported	22 Jul 2019	tx 3+3,566,912−24,935,300
Aptinyx Inc.	3,195,055	reported	31 Mar 2020	tx 13+3,255,092−83,864,275
NewAmsterdam Pharma Co N.V.	3,028,524	reported	15 Sept 2025	tx 9+28,324

Recent transactions

Date	Type	Issuer	Qty	Price	Signals
19 May 2026	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	24,122	0.00 USD
15 Sept 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	660	23.70 USD
17 Sept 2025	TENDER	HilleVax, Inc.	8,535,337	1.95 USD
17 Sept 2025	TENDER	HilleVax, Inc.	17,199	1.95 USD
08 Sept 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	1,260	24.99 USD
11 Aug 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	471	23.98 USD
24 Jun 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	2,520	18.43 USD
25 Jun 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	1,260	18.26 USD
16 Jun 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	8,584	19.50 USD
03 Jun 2025	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	10,500	0.00 USD
03 Jun 2025	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	17,500	0.00 USD	deriv
21 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	3,780	3.86 USD
13 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	1,120	3.16 USD
14 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	6,300	3.32 USD
09 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	2,226	3.62 USD
12 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	12,601	3.04 USD
09 May 2025	PURCHASE	Phathom Pharmaceuticals, Inc.	33,376	3.19 USD
26 Mar 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	1,135	22.49 USD
04 Mar 2025	PURCHASE	NewAmsterdam Pharma Co N.V.	4,005	21.02 USD
23 May 2024	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	10,500	0.00 USD
23 May 2024	GRANT_AWARD	Phathom Pharmaceuticals, Inc.	17,500	0.00 USD	deriv
18 May 2024	TENDER	Nivalis Therapeutics, Inc.	2,829,347	—
20 May 2024	OTHER	Nivalis Therapeutics, Inc.	7,650	—	deriv
20 May 2024	OTHER	Nivalis Therapeutics, Inc.	7,650	—	deriv
20 May 2024	OTHER	Nivalis Therapeutics, Inc.	7,650	—	deriv