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 |
Invesco QQQ Trust
QQQ
|
+$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$75.9M |
| 3 |
NVIDIA
NVDA
|
+$42.6M |
| 4 |
Netflix
NFLX
|
+$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
+$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
+$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$24.3M |
| 5 |
Broadcom
AVGO
|
+$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ECOM
601
DELISTED
CHANNELADVISOR CORPORATION
ECOM
| $319K | ﹤0.01% |
+20,186
| New | +$319K |
|
602
American Eagle Outfitters
AEO
$3.04B
| $318K | ﹤0.01% |
29,204
-20,001
| -41% | -$218K |
|
|
EPAY
603
DELISTED
Bottomline Technologies Inc
EPAY
| $318K | ﹤0.01% |
6,283
-13,067
| -68% | -$661K |
|
604
Empire State Realty Trust
ESRT
$1.31B
| $317K | ﹤0.01% |
45,313
+44,589
| +6,159% | +$312K |
|
605
Flowserve
FLS
$7.18B
| $317K | ﹤0.01% |
11,149
+9,430
| +549% | +$268K |
|
606
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$12B
| $315K | ﹤0.01% |
25,125
-21,525
| -46% | -$270K |
|
|
REV
607
DELISTED
Revlon, Inc.
REV
| $314K | ﹤0.01% |
31,792
+24,518
| +337% | +$242K |
|
608
ProShares Ultra NASDAQ Biotechnology
BIB
$55.8M
| $313K | ﹤0.01% |
4,315
-841
| -16% | -$61K |
|
609
Adient
ADNT
$1.98B
| $312K | ﹤0.01% |
19,057
-12,077
| -39% | -$198K |
|
|
FLG
610
Flagstar Financial, Inc.
FLG
$5.33B
| $312K | ﹤0.01% |
10,219
-1,520
| -13% | -$46.4K |
|
611
Americold
COLD
$3.9B
| $311K | ﹤0.01% |
8,584
+6,286
| +274% | +$228K |
|
612
Stratasys
SSYS
$853M
| $310K | ﹤0.01% |
19,576
+7,477
| +62% | +$118K |
|
613
Kornit Digital
KRNT
$681M
| $309K | ﹤0.01% |
5,804
+1,594
| +38% | +$84.9K |
|
614
Lockheed Martin
LMT
$106B
| $304K | ﹤0.01% |
+834
| New | +$304K |
|
615
EchoStar
SATS
$23.6B
| $304K | ﹤0.01% |
10,882
+2,322
| +27% | +$64.9K |
|
616
Real Estate Select Sector SPDR Fund
XLRE
$7.7B
| $304K | ﹤0.01% |
+8,747
| New | +$304K |
|
617
Brixmor Property Group
BRX
$8.52B
| $303K | ﹤0.01% |
+23,641
| New | +$303K |
|
|
EIGI
618
DELISTED
Endurance International Group Holdings, Inc.
EIGI
| $303K | ﹤0.01% |
75,234
-9,601
| -11% | -$38.7K |
|
619
Celanese
CE
$4.97B
| $299K | ﹤0.01% |
3,472
-6,877
| -66% | -$592K |
|
620
Workiva
WK
$4.52B
| $299K | ﹤0.01% |
5,603
+827
| +17% | +$44.1K |
|
621
Toro Company
TTC
$7.78B
| $298K | ﹤0.01% |
+4,497
| New | +$298K |
|
|
XIFR
622
XPLR Infrastructure, LP
XIFR
$936M
| $298K | ﹤0.01% |
5,827
-44,942
| -89% | -$2.3M |
|
|
CSOD
623
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $297K | ﹤0.01% |
+7,709
| New | +$297K |
|
624
ACM Research
ACMR
$1.72B
| $296K | ﹤0.01% |
14,247
-987
| -6% | -$20.5K |
|
625
Ascendis Pharma
ASND
$12.4B
| $296K | ﹤0.01% |
2,007
-5,927
| -75% | -$874K |
|