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
|
+$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 4 |
Alibaba
BABA
|
+$9.66M |
| 5 |
Intel
INTC
|
+$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.8M |
| 2 |
Gilead Sciences
GILD
|
+$31.2M |
| 3 |
Booking.com
BKNG
|
+$29M |
| 4 |
Amazon
AMZN
|
+$25.6M |
| 5 |
Baidu
BIDU
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
601
Amdocs
DOX
$9.23B
| $106K | 0.01% |
+1,957
| New | +$106K |
|
|
TGI
602
DELISTED
Triumph Group
TGI
| $106K | 0.01% |
1,779
+1,248
| +235% | +$74.4K |
|
|
ACHN
603
DELISTED
Achillion Pharmaceuticals, Inc.
ACHN
| $106K | 0.01% |
10,832
-5,934
| -35% | -$58.1K |
|
604
Willis Towers Watson
WTW
$32.2B
| $105K | 0.01% |
+826
| New | +$105K |
|
605
Canadian Imperial Bank of Commerce
CM
$73.3B
| $104K | 0.01% |
+2,874
| New | +$104K |
|
|
ATW
606
DELISTED
Atwood Oceanics
ATW
| $103K | 0.01% |
+3,674
| New | +$103K |
|
607
Vince Holding
VNCE
$21.3M
| $103K | 0.01% |
558
+494
| +772% | +$91.2K |
|
608
Ventas
VTR
$31.5B
| $103K | 0.01% |
1,244
+287
| +30% | +$23.8K |
|
609
Generac Holdings
GNRC
$10.9B
| $102K | 0.01% |
2,110
-3,410
| -62% | -$165K |
|
610
Knowles
KN
$1.85B
| $102K | 0.01% |
5,309
-14,779
| -74% | -$284K |
|
611
Universal Display
OLED
$6.52B
| $102K | 0.01% |
2,182
-6,509
| -75% | -$304K |
|
|
BWP
612
DELISTED
Boardwalk Pipeline Partners
BWP
| $101K | 0.01% |
6,275
+603
| +11% | +$9.71K |
|
|
VA
613
DELISTED
Virgin America Inc.
VA
| $101K | 0.01% |
3,333
+276
| +9% | +$8.36K |
|
|
HNT
614
DELISTED
HEALTH NET INC
HNT
| $101K | 0.01% |
1,674
+1,653
| +7,871% | +$99.7K |
|
615
Fidelity National Financial
FNF
$16.2B
| $100K | 0.01% |
3,939
-11,253
| -74% | -$286K |
|
616
Scotiabank
BNS
$79.4B
| $99K | 0.01% |
2,087
-2,351
| -53% | -$112K |
|
617
iRobot
IRBT
$107M
| $99K | 0.01% |
3,040
+150
| +5% | +$4.89K |
|
|
SRCL
618
DELISTED
Stericycle Inc
SRCL
| $98K | 0.01% |
+703
| New | +$98K |
|
619
Landstar System
LSTR
$4.5B
| $97K | 0.01% |
1,467
+1,402
| +2,157% | +$92.7K |
|
620
ProShares UltraShort Real Estate
SRS
$22.3M
| $97K | 0.01% |
+267
| New | +$97K |
|
|
WLB
621
DELISTED
Westmoreland Coal Company
WLB
| $97K | 0.01% |
3,625
-5,233
| -59% | -$140K |
|
622
Guess, Inc.
GES
$868M
| $96K | 0.01% |
+5,186
| New | +$96K |
|
623
L3Harris
LHX
$51.6B
| $96K | 0.01% |
+1,231
| New | +$96K |
|
624
Watsco
WSO
$15.8B
| $96K | 0.01% |
771
+672
| +679% | +$83.7K |
|
625
Zumiez
ZUMZ
$356M
| $96K | 0.01% |
2,407
+1,538
| +177% | +$61.3K |
|