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 |
Advanced Micro Devices
AMD
|
$17.7M |
| 2 |
iShares MSCI EAFE ETF
EFA
|
$10.1M |
| 3 |
NIO
NIO
|
$7.66M |
| 4 |
Alibaba
BABA
|
$7.54M |
| 5 |
Micron Technology
MU
|
$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
$101M |
| 2 |
SPDR Gold Trust
GLD
|
$15.2M |
| 3 |
Amazon
AMZN
|
$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
$7.41M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
NXP Semiconductors
NXPI
$57.2B
| $1.44M | ﹤0.01% |
7,136
-1,055
| -13% | -$213K |
|
402
ProShares Short VIX Short-Term Futures ETF
SVXY
$250M
| $1.44M | ﹤0.01% |
51,298
-2,244
| -4% | -$62.9K |
|
|
NVTA
403
DELISTED
Invitae Corporation
NVTA
| $1.44M | ﹤0.01% |
42,713
| – | – |
|
404
Wabtec
WAB
$33B
| $1.43M | ﹤0.01% |
17,432
+3
| +0% | +$245 |
|
405
iRhythm Technologies
IRTC
$5.82B
| $1.42M | ﹤0.01% |
22,310
-1,900
| -8% | -$121K |
|
406
HSBC
HSBC
$227B
| $1.41M | ﹤0.01% |
48,464
+7
| +0% | +$204 |
|
407
Lumentum
LITE
$10.4B
| $1.41M | ﹤0.01% |
16,779
-300
| -2% | -$25.2K |
|
408
Lincoln National
LNC
$7.98B
| $1.41M | ﹤0.01% |
21,895
+5,406
| +33% | +$348K |
|
|
ARVL
409
DELISTED
Arrival Ordinary Shares
ARVL
| $1.41M | ﹤0.01% |
1,807
+60
| +3% | +$46.8K |
|
410
Alto Ingredients
ALTO
$90.6M
| $1.41M | ﹤0.01% |
233,073
+11,560
| +5% | +$69.7K |
|
411
Seres Therapeutics
MCRB
$169M
| $1.4M | ﹤0.01% |
3,108
+644
| +26% | +$291K |
|
412
TE Connectivity
TEL
$61.7B
| $1.4M | ﹤0.01% |
10,262
-100
| -1% | -$13.7K |
|
413
QuidelOrtho
QDEL
$1.95B
| $1.4M | ﹤0.01% |
10,898
-200
| -2% | -$25.7K |
|
414
Bionano Genomics
BNGO
$18.7M
| $1.4M | ﹤0.01% |
342
+31
| +10% | +$127K |
|
415
Sibanye-Stillwater
SBSW
$6.08B
| $1.4M | ﹤0.01% |
82,835
-754
| -0.9% | -$12.7K |
|
|
PFPT
416
DELISTED
Proofpoint, Inc.
PFPT
| $1.4M | ﹤0.01% |
8,047
| – | – |
|
417
Cardinal Health
CAH
$35.7B
| $1.39M | ﹤0.01% |
23,934
+1,511
| +7% | +$87.5K |
|
418
Darling Ingredients
DAR
$5.07B
| $1.39M | ﹤0.01% |
20,590
-26
| -0.1% | -$1.75K |
|
419
Cadence Design Systems
CDNS
$95.6B
| $1.38M | ﹤0.01% |
10,107
-809
| -7% | -$111K |
|
420
Howmet Aerospace
HWM
$71.8B
| $1.38M | ﹤0.01% |
39,941
+45
| +0.1% | +$1.56K |
|
|
UNVR
421
DELISTED
Univar Solutions Inc.
UNVR
| $1.38M | ﹤0.01% |
56,149
| – | – |
|
|
IS
422
DELISTED
ironSource Ltd.
IS
| $1.38M | ﹤0.01% |
128,091
+1,130
| +0.9% | +$12.2K |
|
423
Viasat
VSAT
$3.98B
| $1.38M | ﹤0.01% |
27,552
+600
| +2% | +$29.9K |
|
424
TG Therapeutics
TGTX
$5.11B
| $1.37M | ﹤0.01% |
33,947
-3,000
| -8% | -$121K |
|
425
Kinross Gold
KGC
$26.9B
| $1.37M | ﹤0.01% |
214,936
+9,686
| +5% | +$61.6K |
|