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 |
Gilead Sciences
GILD
|
+$16.8M |
| 2 |
Apple
AAPL
|
+$16.2M |
| 3 |
Booking.com
BKNG
|
+$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$15.3M |
| 5 |
Wells Fargo
WFC
|
+$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
+$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
676
ProShares Short Russell2000
RWM
$127M
| $128K | 0.01% |
2,385
-2,338
| -50% | -$125K |
|
677
ING
ING
$73.2B
| $127K | 0.01% |
+10,347
| New | +$127K |
|
678
TD Synnex
SNX
$12.4B
| $127K | 0.01% |
+2,228
| New | +$127K |
|
679
Sprouts Farmers Market
SFM
$13.4B
| $125K | 0.01% |
+6,070
| New | +$125K |
|
680
Iovance Biotherapeutics
IOVA
$850M
| $124K | 0.01% |
15,083
-57,257
| -79% | -$471K |
|
681
Nokia
NOK
$24.8B
| $124K | 0.01% |
21,419
-48,559
| -69% | -$281K |
|
682
Jones Lang LaSalle
JLL
$14.6B
| $123K | 0.01% |
+1,085
| New | +$123K |
|
683
BioCryst Pharmaceuticals
BCRX
$1.69B
| $122K | 0.01% |
+27,729
| New | +$122K |
|
684
Oshkosh
OSK
$8.71B
| $122K | 0.01% |
+2,193
| New | +$122K |
|
|
GCP
685
DELISTED
GCP Applied Technologies Inc.
GCP
| $122K | 0.01% |
+4,312
| New | +$122K |
|
|
JASO
686
DELISTED
JA Solar Holdings, Co., Ltd
JASO
| $122K | 0.01% |
20,400
-2,682
| -12% | -$16K |
|
687
Broadridge
BR
$29.5B
| $121K | 0.01% |
+1,792
| New | +$121K |
|
|
HIMX
688
Himax Technologies
HIMX
$1.45B
| $121K | 0.01% |
14,108
-40,841
| -74% | -$350K |
|
689
FirstCash
FCFS
$6.51B
| $120K | 0.01% |
2,570
+2,555
| +17,033% | +$119K |
|
690
Mitek Systems
MITK
$458M
| $120K | 0.01% |
14,479
-848
| -6% | -$7.03K |
|
691
Medical Properties Trust
MPW
$2.75B
| $120K | 0.01% |
8,135
-64,282
| -89% | -$948K |
|
|
VRN
692
DELISTED
Veren
VRN
| $120K | 0.01% |
9,117
+8,081
| +780% | +$106K |
|
693
Clean Energy Fuels
CLNE
$544M
| $119K | 0.01% |
26,665
-14,782
| -36% | -$66K |
|
694
Mercado Libre
MELI
$119B
| $119K | 0.01% |
646
-928
| -59% | -$171K |
|
695
ProShares Ultra NASDAQ Biotechnology
BIB
$55.8M
| $118K | 0.01% |
2,450
+1,498
| +157% | +$72.1K |
|
696
Builders FirstSource
BLDR
$15.6B
| $118K | 0.01% |
+10,313
| New | +$118K |
|
697
Cytokinetics
CYTK
$6.07B
| $118K | 0.01% |
12,867
+12,539
| +3,823% | +$115K |
|
698
Omeros
OMER
$286M
| $118K | 0.01% |
10,580
+10,146
| +2,338% | +$113K |
|
|
STL
699
DELISTED
Sterling Bancorp
STL
| $118K | 0.01% |
+6,778
| New | +$118K |
|
700
Danaher
DHR
$140B
| $117K | 0.01% |
+1,698
| New | +$117K |
|