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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
476
Uber
UBER
$198B
| $852K | ﹤0.01% |
+11,337
| New | +$852K |
|
477
JB Hunt Transport Services
JBHT
$13.6B
| $843K | ﹤0.01% |
4,895
-3,058
| -38% | -$527K |
|
478
Harmony Gold Mining
HMY
$9.49B
| $841K | ﹤0.01% |
82,704
+36,234
| +78% | +$368K |
|
479
Flowserve
FLS
$7.36B
| $838K | ﹤0.01% |
+16,216
| New | +$838K |
|
|
JNPR
480
DELISTED
Juniper Networks
JNPR
| $831K | ﹤0.01% |
21,321
-2,802
| -12% | -$109K |
|
481
BridgeBio Pharma
BBIO
$10.2B
| $827K | ﹤0.01% |
32,499
-48,733
| -60% | -$1.24M |
|
482
Granite Construction
GVA
$4.76B
| $827K | ﹤0.01% |
10,436
+4,956
| +90% | +$393K |
|
483
Chemours
CC
$2.5B
| $818K | ﹤0.01% |
+40,281
| New | +$818K |
|
484
O-I Glass
OI
$1.98B
| $818K | ﹤0.01% |
62,372
+12,762
| +26% | +$167K |
|
485
Altimmune
ALT
$328M
| $817K | ﹤0.01% |
133,165
-32,924
| -20% | -$202K |
|
486
Skywest
SKYW
$4.42B
| $816K | ﹤0.01% |
9,598
-5,586
| -37% | -$475K |
|
487
ARS Pharmaceuticals
SPRY
$1.04B
| $806K | ﹤0.01% |
+55,615
| New | +$806K |
|
488
Applied Optoelectronics
AAOI
$1.63B
| $803K | ﹤0.01% |
56,126
+33,218
| +145% | +$475K |
|
489
Zeta Global
ZETA
$4.67B
| $802K | ﹤0.01% |
+26,893
| New | +$802K |
|
490
Lemonade
LMND
$3.89B
| $799K | ﹤0.01% |
+48,492
| New | +$799K |
|
491
National Fuel Gas
NFG
$7.81B
| $797K | ﹤0.01% |
13,154
+6,952
| +112% | +$421K |
|
|
TLN
492
Talen Energy Corporation Common Stock
TLN
$18.5B
| $797K | ﹤0.01% |
+4,476
| New | +$797K |
|
493
EVgo
EVGO
$524M
| $794K | ﹤0.01% |
191,813
+29,527
| +18% | +$122K |
|
494
Sundial Growers
SNDL
$615M
| $792K | ﹤0.01% |
384,821
+146,548
| +62% | +$302K |
|
495
UGI
UGI
$7.34B
| $789K | ﹤0.01% |
31,555
-14,855
| -32% | -$371K |
|
|
LAC
496
Lithium Americas
LAC
$689M
| $784K | ﹤0.01% |
290,374
+165,040
| +132% | +$446K |
|
|
TEN
497
Tsakos Energy Navigation Ltd.
TEN
$664M
| $784K | ﹤0.01% |
31,242
-9,824
| -24% | -$247K |
|
498
Grand Canyon Education
LOPE
$5.7B
| $780K | ﹤0.01% |
5,504
+1,211
| +28% | +$172K |
|
499
Viking Holdings
VIK
$28.3B
| $777K | ﹤0.01% |
22,284
+20,635
| +1,251% | +$720K |
|
500
Zeekr
ZK
$7.55B
| $772K | ﹤0.01% |
34,660
+33,367
| +2,581% | +$743K |
|