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 |
Energy Select Sector SPDR Fund
XLE
|
+$93.9M |
| 2 |
Pfizer
PFE
|
+$89.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Intel
INTC
|
+$60.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$52.5M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$146M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$109M |
| 3 |
Alibaba
BABA
|
+$81.8M |
| 4 |
Walt Disney
DIS
|
+$80.2M |
| 5 |
Citigroup
C
|
+$55.3M |
Sector Composition
| 1 | Technology | 19.03% |
| 2 | Healthcare | 13.86% |
| 3 | Consumer Discretionary | 12.44% |
| 4 | Industrials | 8.48% |
| 5 | Communication Services | 7.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
501
Vanguard Mega Cap Growth ETF
MGK
$30.8B
| $834K | ﹤0.01% |
2,911
+89
| +3% | +$25.5K |
|
|
MRNS
502
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $834K | ﹤0.01% |
+92,271
| New | +$834K |
|
503
KE Holdings
BEKE
$23.3B
| $832K | ﹤0.01% |
60,626
-98,541
| -62% | -$1.35M |
|
|
SII
504
Sprott
SII
$1.88B
| $828K | ﹤0.01% |
22,419
-3,904
| -15% | -$144K |
|
505
Mativ Holdings
MATV
$671M
| $826K | ﹤0.01% |
44,094
-64,033
| -59% | -$1.2M |
|
506
Masimo
MASI
$7.63B
| $821K | ﹤0.01% |
5,595
-9,051
| -62% | -$1.33M |
|
507
Alight
ALIT
$1.77B
| $819K | ﹤0.01% |
+83,192
| New | +$819K |
|
508
Universal Display
OLED
$6.75B
| $817K | ﹤0.01% |
+4,856
| New | +$817K |
|
509
iShares MSCI Global Min Vol Factor ETF
ACWV
$3.29B
| $816K | ﹤0.01% |
7,759
+4,831
| +165% | +$508K |
|
510
Premier
PINC
$2.13B
| $814K | ﹤0.01% |
36,856
+12,948
| +54% | +$286K |
|
|
DO
511
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $813K | ﹤0.01% |
59,628
-8,676
| -13% | -$118K |
|
512
Immunovant
IMVT
$2.58B
| $807K | ﹤0.01% |
24,989
-52,493
| -68% | -$1.7M |
|
513
Intrepid Potash
IPI
$376M
| $805K | ﹤0.01% |
38,600
+3,034
| +9% | +$63.3K |
|
514
Universal Insurance Holdings
UVE
$725M
| $805K | ﹤0.01% |
+39,648
| New | +$805K |
|
515
Charles River Laboratories
CRL
$7.65B
| $804K | ﹤0.01% |
2,970
+808
| +37% | +$219K |
|
516
Masco
MAS
$15.1B
| $804K | ﹤0.01% |
10,195
-8,559
| -46% | -$675K |
|
517
ARK Innovation ETF
ARKK
$9.75B
| $803K | ﹤0.01% |
16,045
-544,410
| -97% | -$27.2M |
|
518
Ares Management
ARES
$40.2B
| $793K | ﹤0.01% |
5,965
-766
| -11% | -$102K |
|
519
Dynatrace
DT
$14.6B
| $791K | ﹤0.01% |
17,033
+6,072
| +55% | +$282K |
|
520
Invesco
IVZ
$10B
| $791K | ﹤0.01% |
47,718
+38,678
| +428% | +$641K |
|
521
RH
RH
$4.21B
| $786K | ﹤0.01% |
+2,259
| New | +$786K |
|
522
fuboTV
FUBO
$1.49B
| $784K | ﹤0.01% |
496,769
+131,823
| +36% | +$208K |
|
523
Invesco Solar ETF
TAN
$750M
| $779K | ﹤0.01% |
17,189
-71,854
| -81% | -$3.26M |
|
|
QVCGA
524
QVC Group Inc Series A
QVCGA
$115M
| $777K | ﹤0.01% |
+12,649
| New | +$777K |
|
|
HA
525
DELISTED
Hawaiian Holdings, Inc.
HA
| $777K | ﹤0.01% |
58,300
-39,058
| -40% | -$521K |
|