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 |
Financial Select Sector SPDR Fund
XLF
|
+$42.3M |
| 2 |
Shopify
SHOP
|
+$37.4M |
| 3 |
Verizon
VZ
|
+$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Merck
MRK
|
+$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
+$38.3M |
| 2 |
Carnival Corp
CCL
|
+$37.6M |
| 3 |
GE Aerospace
GE
|
+$33M |
| 4 |
Advanced Micro Devices
AMD
|
+$30.6M |
| 5 |
Micron Technology
MU
|
+$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1626
Timken Company
TKR
$5.4B
| $85K | ﹤0.01% |
+1,236
| New | +$85K |
|
|
AFIB
1627
DELISTED
Acutus Medical, Inc. Common Stock
AFIB
| $85K | ﹤0.01% |
24,948
+24,479
| +5,219% | +$83.4K |
|
|
BLU
1628
DELISTED
BELLUS Health Inc.
BLU
| $85K | ﹤0.01% |
10,596
+4,392
| +71% | +$35.2K |
|
|
SREV
1629
DELISTED
ServiceSource International, Inc.
SREV
| $85K | ﹤0.01% |
+86,259
| New | +$85K |
|
1630
Annexon
ANNX
$266M
| $84K | ﹤0.01% |
+7,395
| New | +$84K |
|
1631
Plains GP Holdings
PAGP
$3.7B
| $84K | ﹤0.01% |
8,309
-30,702
| -79% | -$310K |
|
1632
SpartanNash
SPTN
$897M
| $84K | ﹤0.01% |
3,280
-16,680
| -84% | -$427K |
|
|
AUD
1633
DELISTED
Audacy, Inc.
AUD
| $84K | ﹤0.01% |
32,693
+1,137
| +4% | +$2.92K |
|
1634
Levi Strauss
LEVI
$8.67B
| $83K | ﹤0.01% |
+3,343
| New | +$83K |
|
1635
nLIGHT
LASR
$1.43B
| $82K | ﹤0.01% |
+3,457
| New | +$82K |
|
|
USX
1636
DELISTED
U.S. Xpress Enterprises, Inc. Class A Common Stock
USX
| $82K | ﹤0.01% |
+14,055
| New | +$82K |
|
|
EMKR
1637
DELISTED
Emcore Corp
EMKR
| $82K | ﹤0.01% |
+1,188
| New | +$82K |
|
1638
Codexis
CDXS
$219M
| $81K | ﹤0.01% |
2,618
+676
| +35% | +$20.9K |
|
1639
Euronet Worldwide
EEFT
$3.6B
| $81K | ﹤0.01% |
681
+436
| +178% | +$51.9K |
|
1640
SPDR S&P 400 Mid Cap Growth ETF
MDYG
$2.44B
| $81K | ﹤0.01% |
+1,000
| New | +$81K |
|
1641
Sonic Automotive
SAH
$2.73B
| $81K | ﹤0.01% |
+1,650
| New | +$81K |
|
|
PTRA
1642
DELISTED
Proterra Inc. Common Stock
PTRA
| $81K | ﹤0.01% |
9,266
+6,370
| +220% | +$55.7K |
|
1643
Hain Celestial
HAIN
$194M
| $80K | ﹤0.01% |
1,880
-20,750
| -92% | -$883K |
|
1644
Owlet
OWLT
$118M
| $80K | ﹤0.01% |
+2,147
| New | +$80K |
|
1645
Quad
QUAD
$333M
| $80K | ﹤0.01% |
20,201
+18,675
| +1,224% | +$74K |
|
1646
Arq
ARQ
$306M
| $80K | ﹤0.01% |
+12,226
| New | +$80K |
|
|
VBIV
1647
DELISTED
VBI Vaccines, Inc. New Common Stock (Canada)
VBIV
| $80K | ﹤0.01% |
1,148
+203
| +21% | +$14.1K |
|
1648
Clarus
CLAR
$147M
| $79K | ﹤0.01% |
2,880
+1,700
| +144% | +$46.6K |
|
1649
Tredegar Corp
TG
$279M
| $79K | ﹤0.01% |
6,768
+6,406
| +1,770% | +$74.8K |
|
|
MIXT
1650
DELISTED
MIX TELEMATICS LIMITED
MIXT
| $79K | ﹤0.01% |
6,290
-2,429
| -28% | -$30.5K |
|