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 | |
|---|---|---|---|---|---|---|
451
Toyota
TM
$260B
| $219K | 0.02% |
1,638
-1,547
| -49% | -$207K |
|
452
Vanguard Small-Cap ETF
VB
$67.2B
| $217K | 0.02% |
1,791
+1,091
| +156% | +$132K |
|
453
Hologic
HOLX
$14.8B
| $215K | 0.02% |
+5,666
| New | +$215K |
|
454
Monster Beverage
MNST
$61B
| $213K | 0.02% |
9,576
-43,422
| -82% | -$966K |
|
455
Prothena Corp
PRTA
$460M
| $213K | 0.02% |
4,055
-5,005
| -55% | -$263K |
|
456
Conagra Brands
CAG
$9.23B
| $212K | 0.02% |
+6,254
| New | +$212K |
|
457
Hilton Worldwide
HLT
$64B
| $212K | 0.02% |
2,568
-4,408
| -63% | -$364K |
|
458
MBIA
MBI
$377M
| $211K | 0.02% |
35,196
+17,860
| +103% | +$107K |
|
|
DYN
459
DELISTED
Dynegy, Inc.
DYN
| $211K | 0.02% |
7,242
+6,941
| +2,306% | +$202K |
|
460
Scotiabank
BNS
$78.8B
| $210K | 0.02% |
4,258
+2,171
| +104% | +$107K |
|
|
DISH
461
DELISTED
DISH Network Corp.
DISH
| $210K | 0.02% |
3,115
+888
| +40% | +$59.9K |
|
|
CRAY
462
DELISTED
Cray, Inc.
CRAY
| $209K | 0.02% |
7,093
+4,387
| +162% | +$129K |
|
463
Teekay
TK
$718M
| $208K | 0.02% |
4,867
+4,451
| +1,070% | +$190K |
|
464
Assertio
ASRT
$76.8M
| $207K | 0.02% |
+2,417
| New | +$207K |
|
|
YELL
465
DELISTED
Yellow Corporation Common Stock
YELL
| $206K | 0.02% |
15,924
-1,853
| -10% | -$24K |
|
|
EXAM
466
DELISTED
EXAMWORKS GROUP INC COM STK (DE)
EXAM
| $205K | 0.02% |
+5,257
| New | +$205K |
|
|
DFS
467
DELISTED
Discover Financial Services
DFS
| $204K | 0.02% |
3,556
-9,691
| -73% | -$556K |
|
|
CEB
468
DELISTED
CEB Inc.
CEB
| $204K | 0.02% |
2,354
+2,345
| +26,056% | +$203K |
|
469
Maximus
MMS
$4.97B
| $203K | 0.02% |
3,100
+3,024
| +3,979% | +$198K |
|
470
Valmont Industries
VMI
$7.46B
| $201K | 0.02% |
1,693
+1,640
| +3,094% | +$195K |
|
|
FGP
471
DELISTED
Ferrellgas Partners, L.P.
FGP
| $201K | 0.02% |
8,944
+3,435
| +62% | +$77.2K |
|
472
Lear
LEA
$5.91B
| $200K | 0.02% |
+1,788
| New | +$200K |
|
473
TJX Companies
TJX
$155B
| $200K | 0.02% |
6,060
-1,432
| -19% | -$47.3K |
|
|
HCR
474
DELISTED
Hi-Crush Inc. Common Stock
HCR
| $199K | 0.02% |
6,511
+2,313
| +55% | +$70.7K |
|
|
TXTR
475
DELISTED
TEXTURA CORPORATION COM
TXTR
| $199K | 0.02% |
7,171
+7,096
| +9,461% | +$197K |
|