Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
NVIDIA
NVDA
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1426
Nordson
NDSN
$12.5B
| $48K | ﹤0.01% |
+227
| New | +$48K |
|
1427
One Stop Systems
OSS
$122M
| $48K | ﹤0.01% |
13,558
-3,742
| -22% | -$13.2K |
|
1428
Ouster
OUST
$1.67B
| $48K | ﹤0.01% |
2,017
-36,779
| -95% | -$875K |
|
|
HTO
1429
H2O America Common Stock
HTO
$1.75B
| $48K | ﹤0.01% |
925
+885
| +2,213% | +$45.9K |
|
1430
American Resources Corp
AREC
$172M
| $47K | ﹤0.01% |
57,029
+50,418
| +763% | +$41.6K |
|
1431
Arhaus
ARHS
$1.52B
| $47K | ﹤0.01% |
5,532
-6,128
| -53% | -$52.1K |
|
1432
Cumberland Pharmaceuticals
CPIX
$51.5M
| $47K | ﹤0.01% |
14,218
-4,882
| -26% | -$16.1K |
|
1433
Embecta
EMBC
$878M
| $47K | ﹤0.01% |
4,918
+2,715
| +123% | +$25.9K |
|
1434
The Honest Company
HNST
$447M
| $47K | ﹤0.01% |
9,268
-7,300
| -44% | -$37K |
|
1435
Heartland Express
HTLD
$656M
| $47K | ﹤0.01% |
5,529
-3,172
| -36% | -$27K |
|
1436
Tennant Co
TNC
$1.5B
| $47K | ﹤0.01% |
614
+228
| +59% | +$17.5K |
|
1437
Direxion Daily TSLA Bear 1X Shares
TSLS
$62.2M
| $47K | ﹤0.01% |
+6,016
| New | +$47K |
|
1438
YPF
YPF
$10.7B
| $47K | ﹤0.01% |
1,507
-115,817
| -99% | -$3.61M |
|
1439
Ardagh Metal Packaging
AMBP
$2.13B
| $46K | ﹤0.01% |
10,795
-16,944
| -61% | -$72.2K |
|
1440
Helix Energy Solutions
HLX
$914M
| $46K | ﹤0.01% |
7,479
-44,615
| -86% | -$274K |
|
1441
International Seaways
INSW
$2.33B
| $46K | ﹤0.01% |
1,286
-1,289
| -50% | -$46.1K |
|
1442
Sky Harbour Group
SKYH
$341M
| $46K | ﹤0.01% |
4,714
+1,696
| +56% | +$16.6K |
|
|
ATYR
1443
aTyr Pharma
ATYR
$591M
| $46K | ﹤0.01% |
9,203
-87,649
| -90% | -$438K |
|
1444
Aviat Networks
AVNW
$305M
| $45K | ﹤0.01% |
1,874
-9,920
| -84% | -$238K |
|
1445
Black Stone Minerals
BSM
$2.65B
| $45K | ﹤0.01% |
+3,513
| New | +$45K |
|
1446
GraniteShares 2x Short NVDA Daily ETF
NVD
$46.8M
| $45K | ﹤0.01% |
3,564
-1,194
| -25% | -$15.1K |
|
1447
Invesco Semiconductors ETF
PSI
$907M
| $45K | ﹤0.01% |
753
+671
| +818% | +$40.1K |
|
1448
VistaGen Therapeutics
VTGN
$104M
| $45K | ﹤0.01% |
22,536
+20,134
| +838% | +$40.2K |
|
|
LLYX
1449
Defiance Daily Target 2x Long LLY ETF
LLYX
$95.2M
| $45K | ﹤0.01% |
+2,895
| New | +$45K |
|
1450
Penske Automotive Group
PAG
$11.9B
| $44K | ﹤0.01% |
260
-107
| -29% | -$18.1K |
|