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
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
676
Mastercard
MA
$532B
| $198K | ﹤0.01% |
+750
| New | +$198K |
|
|
XLRN
677
DELISTED
Acceleron Pharma Inc.
XLRN
| $198K | ﹤0.01% |
4,826
-9,174
| -66% | -$376K |
|
678
Edgewell Personal Care
EPC
$1.02B
| $197K | ﹤0.01% |
7,320
+4,353
| +147% | +$117K |
|
|
JJG
679
DELISTED
iPath Series B Bloomberg Grains Subindex Total ReturnSM ETN
JJG
| $196K | ﹤0.01% |
+4,115
| New | +$196K |
|
680
Arch Capital
ACGL
$34.4B
| $195K | ﹤0.01% |
5,277
+5,218
| +8,844% | +$193K |
|
681
Flex
FLEX
$21.6B
| $195K | ﹤0.01% |
27,164
+22,435
| +474% | +$161K |
|
682
iShares US Medical Devices ETF
IHI
$4.31B
| $195K | ﹤0.01% |
+4,884
| New | +$195K |
|
683
Direxion Daily MSCI India Bull 2X Shares
INDL
$68.2M
| $195K | ﹤0.01% |
2,596
+1,734
| +201% | +$130K |
|
684
Prothena Corp
PRTA
$454M
| $195K | ﹤0.01% |
18,469
+18,298
| +10,701% | +$193K |
|
685
Alarm.com
ALRM
$2.82B
| $194K | ﹤0.01% |
+3,633
| New | +$194K |
|
686
Extreme Networks
EXTR
$3.02B
| $194K | ﹤0.01% |
30,010
+18,268
| +156% | +$118K |
|
687
Upbound Group
UPBD
$1.48B
| $194K | ﹤0.01% |
7,311
-11,190
| -60% | -$297K |
|
688
Aurinia Pharmaceuticals
AUPH
$1.68B
| $192K | ﹤0.01% |
+29,235
| New | +$192K |
|
689
Travelers Companies
TRV
$62.9B
| $192K | ﹤0.01% |
1,287
+592
| +85% | +$88.3K |
|
690
Spok Holdings
SPOK
$363M
| $189K | ﹤0.01% |
12,607
+11,399
| +944% | +$171K |
|
|
TYPE
691
DELISTED
Monotype Imaging Holdings Inc.
TYPE
| $189K | ﹤0.01% |
11,246
+10,387
| +1,209% | +$175K |
|
692
WD-40
WDFC
$2.88B
| $187K | ﹤0.01% |
1,182
+1,051
| +802% | +$166K |
|
693
Copa Holdings
CPA
$4.82B
| $186K | ﹤0.01% |
1,910
-607
| -24% | -$59.1K |
|
694
Monster Beverage
MNST
$62.3B
| $186K | ﹤0.01% |
5,846
-30,846
| -84% | -$981K |
|
|
AGEN
695
Agenus
AGEN
$151M
| $185K | ﹤0.01% |
3,155
-944
| -23% | -$55.4K |
|
696
CryoPort
CYRX
$474M
| $184K | ﹤0.01% |
10,092
+6,095
| +152% | +$111K |
|
697
Compugen
CGEN
$131M
| $183K | ﹤0.01% |
47,750
+31,624
| +196% | +$121K |
|
698
Garrett Motion
GTX
$2.69B
| $181K | ﹤0.01% |
11,803
+969
| +9% | +$14.9K |
|
699
Kennametal
KMT
$1.6B
| $181K | ﹤0.01% |
4,900
+2,630
| +116% | +$97.1K |
|
700
Ryanair
RYAAY
$31.7B
| $181K | ﹤0.01% |
+7,085
| New | +$181K |
|