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 |
Alphabet (Google) Class C
GOOG
|
+$54.1M |
| 2 |
Apple
AAPL
|
+$28.6M |
| 3 |
Meta Platforms (Facebook)
META
|
+$16.5M |
| 4 |
IBM
IBM
|
+$13.4M |
| 5 |
Baidu
BIDU
|
+$10.3M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 2 |
McDonald's
MCD
|
+$8.52M |
| 3 |
Ralph Lauren
RL
|
+$5.22M |
| 4 |
Intel
INTC
|
+$4.74M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.67M |
Sector Composition
| 1 | Communication Services | 22.01% |
| 2 | Technology | 15.83% |
| 3 | Healthcare | 11.95% |
| 4 | Consumer Discretionary | 9.73% |
| 5 | Financials | 7.98% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
SINA
551
DELISTED
Sina Corp
SINA
| $154K | 0.01% |
2,893
-48
| -2% | -$2.56K |
|
|
THOR
552
DELISTED
THORATEC CORPORATION
THOR
| $154K | 0.01% |
3,477
+3,414
| +5,419% | +$151K |
|
553
Trex
TREX
$6.43B
| $153K | 0.01% |
12,424
+10,100
| +435% | +$124K |
|
|
SNP
554
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $152K | 0.01% |
1,776
-564
| -24% | -$48.3K |
|
|
NAV
555
DELISTED
Navistar International
NAV
| $152K | 0.01% |
+6,748
| New | +$152K |
|
556
Arbutus Biopharma
ABUS
$830M
| $151K | 0.01% |
12,744
+4,097
| +47% | +$48.5K |
|
557
iShares Mortgage Real Estate ETF
REM
$618M
| $150K | 0.01% |
3,561
+2,685
| +307% | +$113K |
|
558
Guidewire Software
GWRE
$21.6B
| $149K | 0.01% |
2,826
+2,411
| +581% | +$127K |
|
559
SPDR Euro Stoxx 50 ETF
FEZ
$4.56B
| $148K | 0.01% |
3,960
-4,650
| -54% | -$174K |
|
|
SOHU
560
Sohu.com
SOHU
$481M
| $148K | 0.01% |
+2,509
| New | +$148K |
|
|
COL
561
DELISTED
Rockwell Collins
COL
| $148K | 0.01% |
+1,603
| New | +$148K |
|
562
Baytex Energy
BTE
$1.71B
| $147K | 0.01% |
9,491
-9,453
| -50% | -$146K |
|
|
WBMD
563
DELISTED
WebMD Health Corp.
WBMD
| $147K | 0.01% |
3,322
+3,279
| +7,626% | +$145K |
|
564
American Coastal Insurance
ACIC
$539M
| $145K | 0.01% |
9,332
+3,554
| +62% | +$55.2K |
|
565
PVH
PVH
$3.96B
| $145K | 0.01% |
1,265
-4,975
| -80% | -$570K |
|
|
UTEK
566
DELISTED
Ultratech Inc.
UTEK
| $145K | 0.01% |
7,849
+5,950
| +313% | +$110K |
|
|
HCC
567
DELISTED
HCC INSURANCES HOLDINGS INC
HCC
| $145K | 0.01% |
+1,896
| New | +$145K |
|
|
SAVE
568
DELISTED
Spirit Airlines, Inc.
SAVE
| $144K | 0.01% |
2,321
+1,694
| +270% | +$105K |
|
|
QLTI
569
DELISTED
QLT Inc
QLTI
| $144K | 0.01% |
+34,883
| New | +$144K |
|
570
Constellium
CSTM
$1.92B
| $143K | 0.01% |
12,143
+6,747
| +125% | +$79.5K |
|
571
Amicus Therapeutics
FOLD
$2.43B
| $143K | 0.01% |
10,159
-31,842
| -76% | -$448K |
|
|
TAL
572
DELISTED
TAL INTERNATIONAL GROUP, INC.
TAL
| $143K | 0.01% |
4,530
+2,152
| +90% | +$67.9K |
|
573
CorMedix
CRMD
$973M
| $142K | 0.01% |
7,329
+5,622
| +329% | +$109K |
|
574
Lennox International
LII
$19.6B
| $142K | 0.01% |
+1,325
| New | +$142K |
|
575
Vornado Realty Trust
VNO
$7.66B
| $142K | 0.01% |
+1,860
| New | +$142K |
|