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 |
Amazon
AMZN
|
$144M |
| 2 |
Invesco QQQ Trust
QQQ
|
$68.7M |
| 3 |
AT&T
T
|
$45.5M |
| 4 |
Meta Platforms (Facebook)
META
|
$38M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
$35.4M |
Top Sells
| 1 |
Microsoft
MSFT
|
$94.2M |
| 2 |
Citigroup
C
|
$62.3M |
| 3 |
JPMorgan Chase
JPM
|
$56.2M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
$45.8M |
| 5 |
SPDR Gold Trust
GLD
|
$44.4M |
Sector Composition
| 1 | Consumer Discretionary | 16.85% |
| 2 | Technology | 15.5% |
| 3 | Communication Services | 10.53% |
| 4 | Healthcare | 8.8% |
| 5 | Consumer Staples | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
51
ProShares UltraShort S&P500
SDS
$447M
| $7.79M | 0.01% |
169,453
+165,310
| +3,990% | +$7.6M |
|
52
Shopify
SHOP
$182B
| $7.72M | 0.01% |
+222,300
| New | +$7.72M |
|
53
KraneShares CSI China Internet ETF
KWEB
$8.51B
| $7.6M | 0.01% |
251,723
-931,076
| -79% | -$28.1M |
|
54
Pure Storage
PSTG
$25.5B
| $7.48M | 0.01% |
279,503
+154,345
| +123% | +$4.13M |
|
55
Southwest Airlines
LUV
$17B
| $7.43M | 0.01% |
220,537
+197,519
| +858% | +$6.65M |
|
56
Lockheed Martin
LMT
$105B
| $7.38M | 0.01% |
15,162
-19,794
| -57% | -$9.63M |
|
|
PARA
57
DELISTED
Paramount Global Class B
PARA
| $7.1M | 0.01% |
420,414
-497,038
| -54% | -$8.39M |
|
58
Invesco Solar ETF
TAN
$722M
| $6.7M | 0.01% |
91,845
+88,095
| +2,349% | +$6.43M |
|
59
General Motors
GM
$55B
| $6.56M | 0.01% |
195,072
+72,807
| +60% | +$2.45M |
|
60
KLA
KLAC
$111B
| $6.2M | 0.01% |
16,440
+12,236
| +291% | +$4.61M |
|
61
Wheaton Precious Metals
WPM
$46.5B
| $6.18M | 0.01% |
158,248
-7,694
| -5% | -$301K |
|
62
Atlassian
TEAM
$44.8B
| $5.83M | 0.01% |
+45,339
| New | +$5.83M |
|
63
SPDR S&P Biotech ETF
XBI
$5.29B
| $5.67M | 0.01% |
68,331
-14,190
| -17% | -$1.18M |
|
64
Halliburton
HAL
$18.4B
| $5.61M | 0.01% |
142,626
-133,901
| -48% | -$5.27M |
|
65
Canadian Solar
CSIQ
$663M
| $5.51M | 0.01% |
178,199
-26,424
| -13% | -$816K |
|
66
Macy's
M
$4.42B
| $5.48M | 0.01% |
265,227
-69,339
| -21% | -$1.43M |
|
67
Adobe
ADBE
$148B
| $5.45M | 0.01% |
+16,197
| New | +$5.45M |
|
68
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$264M
| $5.44M | 0.01% |
385,333
+382,086
| +11,767% | +$5.39M |
|
69
Mastercard
MA
$536B
| $5.21M | 0.01% |
14,979
+768
| +5% | +$267K |
|
|
MAXR
70
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $5.2M | 0.01% |
100,435
+99,169
| +7,833% | +$5.13M |
|
71
W.W. Grainger
GWW
$48.7B
| $5M | 0.01% |
8,982
-882
| -9% | -$491K |
|
72
Align Technology
ALGN
$9.59B
| $4.94M | 0.01% |
23,406
+6,345
| +37% | +$1.34M |
|
73
iShares Select Dividend ETF
DVY
$20.6B
| $4.93M | 0.01% |
40,885
+32,012
| +361% | +$3.86M |
|
74
FedEx
FDX
$53.2B
| $4.85M | 0.01% |
+28,009
| New | +$4.85M |
|
75
Bank of New York Mellon
BK
$73.8B
| $4.84M | 0.01% |
106,268
-6,180
| -5% | -$281K |
|