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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
PTR
601
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $229K | 0.01% |
3,296
+2,266
| +220% | +$157K |
|
602
ING
ING
$73B
| $228K | 0.01% |
13,481
+2,610
| +24% | +$44.1K |
|
603
iShares S&P 500 Value ETF
IVE
$40.8B
| $226K | 0.01% |
+2,071
| New | +$226K |
|
604
Enbridge
ENB
$106B
| $226K | 0.01% |
+7,194
| New | +$226K |
|
605
MarketAxess Holdings
MKTX
$6.9B
| $225K | 0.01% |
1,035
+259
| +33% | +$56.3K |
|
606
M&T Bank
MTB
$31B
| $225K | 0.01% |
+1,225
| New | +$225K |
|
|
LM
607
DELISTED
Legg Mason, Inc.
LM
| $225K | 0.01% |
+5,550
| New | +$225K |
|
608
HealthEquity
HQY
$7.88B
| $224K | 0.01% |
3,703
+2,724
| +278% | +$165K |
|
609
Sprouts Farmers Market
SFM
$13.1B
| $224K | 0.01% |
9,574
-43,625
| -82% | -$1.02M |
|
|
JBGS
610
JBG SMITH
JBGS
$1.43B
| $221K | 0.01% |
6,579
-6,227
| -49% | -$209K |
|
|
SEP
611
DELISTED
Spectra Engy Parters Lp
SEP
| $221K | 0.01% |
6,592
+1,954
| +42% | +$65.5K |
|
612
Acacia Research
ACTG
$304M
| $220K | 0.01% |
63,040
+36,696
| +139% | +$128K |
|
613
Viasat
VSAT
$3.91B
| $219K | 0.01% |
+3,339
| New | +$219K |
|
614
Heron Therapeutics
HRTX
$195M
| $218K | 0.01% |
+7,909
| New | +$218K |
|
|
STAY
615
DELISTED
Extended Stay America, Inc. Paired Share Unit
STAY
| $218K | 0.01% |
11,034
-1,155
| -9% | -$22.8K |
|
616
iShares MSCI Taiwan ETF
EWT
$6.49B
| $216K | 0.01% |
+5,647
| New | +$216K |
|
617
MillerKnoll
MLKN
$1.38B
| $215K | 0.01% |
+6,760
| New | +$215K |
|
618
ProShares Ultra Technology
ROM
$811M
| $215K | 0.01% |
+18,672
| New | +$215K |
|
619
FirstCash
FCFS
$6.46B
| $214K | 0.01% |
2,636
+1,192
| +83% | +$96.8K |
|
620
MakeMyTrip
MMYT
$9.1B
| $214K | 0.01% |
6,195
+4,048
| +189% | +$140K |
|
621
Comstock Resources
CRK
$4.65B
| $213K | 0.01% |
29,265
-84
| -0.3% | -$611 |
|
622
Helmerich & Payne
HP
$2.07B
| $213K | 0.01% |
3,215
+1,195
| +59% | +$79.2K |
|
623
LPL Financial
LPLA
$27.4B
| $213K | 0.01% |
+3,490
| New | +$213K |
|
|
IDTI
624
DELISTED
Integrated Device Technology I
IDTI
| $210K | 0.01% |
6,899
-684
| -9% | -$20.8K |
|
|
DPLO
625
DELISTED
DIPLOMAT PHARMACY, INC.
DPLO
| $209K | 0.01% |
10,373
-4,014
| -28% | -$80.9K |
|