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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
826
A10 Networks
ATEN
$1.29B
| $116K | ﹤0.01% |
16,731
-95,517
| -85% | -$662K |
|
|
CAF
827
Morgan Stanley China A Share Fund
CAF
$269M
| $116K | ﹤0.01% |
5,710
+3,290
| +136% | +$66.8K |
|
|
GCP
828
DELISTED
GCP Applied Technologies Inc.
GCP
| $116K | ﹤0.01% |
+6,026
| New | +$116K |
|
|
GCI
829
DELISTED
Gannett Co., Inc
GCI
| $115K | ﹤0.01% |
10,761
+9,408
| +695% | +$101K |
|
830
Brown-Forman Class B
BF.B
$13B
| $114K | ﹤0.01% |
1,829
-3,599
| -66% | -$224K |
|
831
DuPont de Nemours
DD
$32.7B
| $114K | ﹤0.01% |
+1,599
| New | +$114K |
|
832
Cedar Fair
FUN
$2.2B
| $114K | ﹤0.01% |
1,964
+627
| +47% | +$36.4K |
|
833
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.18B
| $114K | ﹤0.01% |
2,694
+360
| +15% | +$15.2K |
|
834
Team
TISI
$81.4M
| $114K | ﹤0.01% |
+633
| New | +$114K |
|
|
TGE
835
DELISTED
Tallgrass Energy, LP Class A Shares
TGE
| $114K | ﹤0.01% |
+5,666
| New | +$114K |
|
836
Invitation Homes
INVH
$18.8B
| $113K | ﹤0.01% |
+3,827
| New | +$113K |
|
837
MACOM Technology Solutions
MTSI
$9.76B
| $113K | ﹤0.01% |
5,283
+450
| +9% | +$9.63K |
|
838
Telephone and Data Systems
TDS
$4.53B
| $112K | ﹤0.01% |
+4,352
| New | +$112K |
|
|
AKS
839
DELISTED
AK Steel Holding Corp.
AKS
| $112K | ﹤0.01% |
49,570
+34,476
| +228% | +$77.9K |
|
|
MTSC
840
DELISTED
MTS Systems Corp
MTSC
| $112K | ﹤0.01% |
+2,035
| New | +$112K |
|
841
Voyager Therapeutics
VYGR
$243M
| $111K | ﹤0.01% |
6,499
-17,398
| -73% | -$297K |
|
842
Teucrium Sugar Fund
CANE
$12.4M
| $110K | ﹤0.01% |
+16,525
| New | +$110K |
|
843
CarGurus
CARG
$3.6B
| $110K | ﹤0.01% |
3,556
+523
| +17% | +$16.2K |
|
|
JMIA
844
Jumia Technologies
JMIA
$1.19B
| $110K | ﹤0.01% |
+13,995
| New | +$110K |
|
|
MFA
845
MFA Financial
MFA
$1.05B
| $110K | ﹤0.01% |
3,746
-5,053
| -57% | -$148K |
|
846
Newmark Group
NMRK
$3.4B
| $110K | ﹤0.01% |
12,177
+11,009
| +943% | +$99.4K |
|
847
Range Resources
RRC
$8.38B
| $110K | ﹤0.01% |
+28,840
| New | +$110K |
|
|
SINA
848
DELISTED
Sina Corp
SINA
| $110K | ﹤0.01% |
+2,810
| New | +$110K |
|
|
SDRL
849
DELISTED
Seadrill Limited Common Stock
SDRL
| $110K | ﹤0.01% |
52,534
-50,199
| -49% | -$105K |
|
|
FOMX
850
DELISTED
Foamix Pharmaceuticals Ltd. Ordinary Shares
FOMX
| $110K | ﹤0.01% |
36,453
+35,208
| +2,828% | +$106K |
|