MarketPeel
Insider Trading Intelligence
Pricing
…
RB

Ralph Brandenberger

NKTX
SR. VP, TECHNICAL OPERATIONS · NKARTA, INC. · CIK 0001853197
FILING MIX · LIFETIME48%/52%
BUYS
35
SELLS
38
TOTAL VALUE
$1.10M
COMPANIES
1
ACTIVE SINCE
Jun 2021
HOLDINGS NOW
124,796
AVG SELL PX
$15.02
TRADE KIND
SHOWING 73 / 73
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
14 backtested trades · 8 horizons · 1 pending
Forward-return performance of every backtestable P/S trade by Ralph Brandenberger, 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+64.29%-2.48%+0.40%-2.88%-4.19%—
14d14+64.29%-6.15%-0.10%-6.05%-3.02%—
30d14+64.29%-3.46%+0.76%-4.22%-5.27%—
60d14+85.71%-20.34%-1.41%-18.93%-19.07%—
90d14+78.57%-24.02%-0.35%-23.66%-19.58%—
180d14+92.86%-47.67%+5.54%-53.22%-63.23%—
1y14+85.71%-51.30%+11.09%-62.39%-75.11%—
2y14(1 pending)+100.00%-68.90%+32.05%-100.95%-97.51%—
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
NKTX · 124,796 shares · as of Jan 15, 2025
033,06166,12299,182132,2432022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
FLOW · 35 buys / 38 sellsCOVERAGE · 16 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
7,447$2.20$16.4K124,796Jan 15, 2025Jan 17, 2025 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
105,000——105,000Jan 3, 2025Jan 7, 2025 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
52,500——132,243Jan 3, 2025Jan 7, 2025 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
229$5.60$1.3K79,743Jun 18, 2024Jun 20, 2024 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
3,808$3.89$14.8K85,384Mar 1, 2024Mar 5, 2024 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
3,808——22,445Mar 1, 2024Mar 5, 2024 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
2,955$3.89$11.5K88,339Mar 1, 2024Mar 5, 2024 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
8,367$12.51$104.7K79,972Mar 1, 2024Mar 5, 2024 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
2,955——25,629Mar 1, 2024Mar 5, 2024 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
2,512$8.74$22.0K81,576Jan 16, 2024Jan 18, 2024 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
112,500——112,500Jan 4, 2024Jan 8, 2024 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
56,000——84,088Jan 4, 2024Jan 8, 2024 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
221$4.85$1.1K28,088Jun 20, 2023Jun 22, 2023 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
491$5.49$2.7K28,309Jan 17, 2023Jan 18, 2023 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
42,000——42,000Jan 13, 2023Jan 18, 2023 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
21,000——28,800Jan 13, 2023Jan 18, 2023 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
842——28,584Oct 6, 2022Oct 7, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
842$3.89$3.3K8,642Oct 6, 2022Oct 7, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
842$14.02$11.8K7,800Oct 6, 2022Oct 7, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
11,000$3.89$42.8K18,800Aug 15, 2022Aug 17, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
11,000$17.64$194.1K7,800Aug 15, 2022Aug 17, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
11,000——26,253Aug 15, 2022Aug 17, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
6,886$3.89$26.8K19,053Aug 8, 2022Aug 10, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
4,367——0Aug 8, 2022Aug 10, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
6,886——37,253Aug 8, 2022Aug 10, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
340$4.77$1.6K19,393Aug 8, 2022Aug 10, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
4,367$0.41$1.8K12,167Aug 8, 2022Aug 10, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
340——8,445Aug 8, 2022Aug 10, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
11,593$15.51$179.8K7,800Aug 8, 2022Aug 10, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
3,000$13.41$40.2K7,800Jul 25, 2022Jul 26, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Chief Technical Officer
3,000$0.41$1.2K10,800Jul 25, 2022Jul 26, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Chief Technical Officer
3,000——4,367Jul 25, 2022Jul 26, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
20,000——20,000Jul 15, 2022Jul 18, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
2,500——7,800Jun 17, 2022Jun 21, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
15,000——15,000Jun 17, 2022Jun 21, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
340——7,367Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
1,358$3.89$5.3K7,403Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
405——8,785Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
4,140$15.00$62.1K5,300Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
2,037$3.89$7.9K9,440Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
1,358——29,426Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
2,037——44,139Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
405$4.77$1.9K6,045Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
340$0.41$1395,640Jun 3, 2022Jun 7, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
5,300——5,300Jan 14, 2022Jan 19, 2022 ↗View →
NKTX
NKARTA, INC.
PURCHASEGRANT
Stock grant
31,400——31,400Jan 14, 2022Jan 19, 2022 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
4,140$15.64$64.7K0Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
1,358$3.89$5.3K2,103Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
340——7,707Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
2,037$3.89$7.9K4,140Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
340$0.41$139340Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
Sr. VP, Technical Operations
405$4.77$1.9K745Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
1,358——30,784Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
405——9,190Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
Sr. VP, Technical Operations
2,037——46,176Dec 1, 2021Dec 3, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
405——9,595Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
340——8,047Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
1,358——32,142Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
2,037$3.89$7.9K4,140Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
405$4.77$1.9K745Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
4,140$32.08$132.8K0Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
1,358$3.89$5.3K2,103Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
2,037——48,213Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
340$0.41$139340Sep 1, 2021Sep 2, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
340$0.41$139340Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
405——10,000Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
2,037$3.89$7.9K4,140Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
340——8,387Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
1,358——33,500Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
4,140$24.50$101.4K0Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
405$4.77$1.9K745Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
PURCHASE
See Remarks
1,358$3.89$5.3K2,103Jun 2, 2021Jun 4, 2021 ↗View →
NKTX
NKARTA, INC.
SALE
See Remarks
2,037——50,250Jun 2, 2021Jun 4, 2021 ↗View →
Other insiders · NKTX
Loading peer insiders…
About this filer
CIK 0001853197
ROLE
Sr. VP, Technical Operations
PRIMARY
NKTX
COMPANIES
1
ACTIVE SINCE
Jun 2021
MARKETPEEL · /INSIDER/0001853197DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

Feedback