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 | |
|---|---|---|---|---|---|---|
826
Halozyme
HALO
$9B
| $123K | 0.01% |
6,325
-4,752
| -43% | -$92.4K |
|
|
AIFU
827
AIFU Inc. Class A Ordinary Share
AIFU
$85M
| $123K | 0.01% |
+228
| New | +$123K |
|
|
EGRX
828
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $123K | 0.01% |
2,348
-3,482
| -60% | -$182K |
|
|
NEX
829
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $123K | 0.01% |
8,316
-11,112
| -57% | -$164K |
|
|
FRC
830
DELISTED
First Republic Bank
FRC
| $123K | 0.01% |
1,333
+546
| +69% | +$50.4K |
|
831
Lincoln Electric
LECO
$13.3B
| $122K | 0.01% |
+1,359
| New | +$122K |
|
|
CAF
832
Morgan Stanley China A Share Fund
CAF
$269M
| $121K | 0.01% |
4,897
-7,633
| -61% | -$189K |
|
833
Mercer International
MERC
$206M
| $121K | 0.01% |
9,767
+7,447
| +321% | +$92.3K |
|
|
MSB
834
Mesabi Trust
MSB
$414M
| $120K | 0.01% |
4,661
-592
| -11% | -$15.2K |
|
835
Transact Technologies
TACT
$46.9M
| $120K | 0.01% |
9,258
+8,621
| +1,353% | +$112K |
|
|
FMSA
836
DELISTED
Fairmount Santrol Holdings Inc.
FMSA
| $120K | 0.01% |
28,378
+26,833
| +1,737% | +$113K |
|
837
Mitek Systems
MITK
$471M
| $119K | 0.01% |
16,130
+11,246
| +230% | +$83K |
|
838
Virtu Financial
VIRT
$3.12B
| $119K | 0.01% |
3,610
-3,766
| -51% | -$124K |
|
|
NETI
839
DELISTED
Eneti Inc.
NETI
| $119K | 0.01% |
1,818
-3,137
| -63% | -$205K |
|
|
VRAY
840
DELISTED
ViewRay, Inc.
VRAY
| $119K | 0.01% |
18,509
-34,561
| -65% | -$222K |
|
|
HDP
841
DELISTED
Hortonworks, Inc.
HDP
| $119K | 0.01% |
5,881
-12,571
| -68% | -$254K |
|
842
Wabtec
WAB
$32.6B
| $118K | 0.01% |
+1,452
| New | +$118K |
|
843
Kadant
KAI
$3.83B
| $117K | 0.01% |
+1,248
| New | +$117K |
|
|
DMK
844
DELISTED
DMK Pharmaceuticals Corporation Common Stock
DMK
| $117K | 0.01% |
481
+471
| +4,710% | +$115K |
|
|
PCOM
845
DELISTED
Points.com Inc. Common Shares
PCOM
| $117K | 0.01% |
12,068
+5,329
| +79% | +$51.7K |
|
846
CRH
CRH
$76.6B
| $116K | 0.01% |
+3,431
| New | +$116K |
|
847
Leggett & Platt
LEG
$1.33B
| $116K | 0.01% |
2,622
+1,936
| +282% | +$85.7K |
|
848
Schwab US Large-Cap Growth ETF
SCHG
$49.4B
| $116K | 0.01% |
+12,944
| New | +$116K |
|
|
ABMD
849
DELISTED
Abiomed Inc
ABMD
| $116K | 0.01% |
400
-4,915
| -92% | -$1.43M |
|
|
RRD
850
DELISTED
RR Donnelley & Sons Co.
RRD
| $116K | 0.01% |
13,337
+8,738
| +190% | +$76K |
|