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 |
Apple
AAPL
|
$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$38.8M |
| 4 |
Amazon
AMZN
|
$38.6M |
| 5 |
Tesla
TSLA
|
$36M |
Top Sells
| 1 |
Alibaba
BABA
|
$46.4M |
| 2 |
Boeing
BA
|
$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
NVIDIA
NVDA
|
$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MIC
351
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $747K | ﹤0.01% |
17,442
-3,105
| -15% | -$133K |
|
352
SBA Communications
SBAC
$21.2B
| $742K | ﹤0.01% |
+3,079
| New | +$742K |
|
353
Madrigal Pharmaceuticals
MDGL
$9.65B
| $741K | ﹤0.01% |
8,141
+1,084
| +15% | +$98.7K |
|
354
Plains GP Holdings
PAGP
$3.64B
| $741K | ﹤0.01% |
39,125
+35,782
| +1,070% | +$678K |
|
355
Yeti Holdings
YETI
$2.95B
| $739K | ﹤0.01% |
+21,275
| New | +$739K |
|
|
LL
356
DELISTED
LL Flooring Holdings, Inc.
LL
| $736K | ﹤0.01% |
+75,378
| New | +$736K |
|
357
Gentex
GNTX
$6.25B
| $732K | ﹤0.01% |
+25,292
| New | +$732K |
|
358
Factset
FDS
$14B
| $728K | ﹤0.01% |
+2,717
| New | +$728K |
|
|
HUYA
359
Huya Inc
HUYA
$796M
| $726K | ﹤0.01% |
40,485
+1,169
| +3% | +$21K |
|
|
SAIL
360
DELISTED
SailPoint Technologies Holdings, Inc. Common Stock
SAIL
| $718K | ﹤0.01% |
30,446
+27,897
| +1,094% | +$658K |
|
|
HEP
361
DELISTED
Holly Energy Partners, L.P.
HEP
| $718K | ﹤0.01% |
32,446
+22,938
| +241% | +$508K |
|
362
argenx
ARGX
$45.9B
| $711K | ﹤0.01% |
4,432
+2,828
| +176% | +$454K |
|
363
Agnico Eagle Mines
AEM
$76.3B
| $709K | ﹤0.01% |
11,514
-15,030
| -57% | -$926K |
|
|
FTCH
364
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $703K | ﹤0.01% |
67,974
+65,299
| +2,441% | +$675K |
|
365
XPO
XPO
$15.4B
| $701K | ﹤0.01% |
25,450
+20,150
| +380% | +$555K |
|
366
TG Therapeutics
TGTX
$5.11B
| $700K | ﹤0.01% |
63,099
+36,606
| +138% | +$406K |
|
367
Upland Software
UPLD
$70.5M
| $697K | ﹤0.01% |
19,538
-3,329
| -15% | -$119K |
|
368
American Water Works
AWK
$28B
| $693K | ﹤0.01% |
+5,647
| New | +$693K |
|
369
Tandem Diabetes Care
TNDM
$850M
| $692K | ﹤0.01% |
+11,612
| New | +$692K |
|
|
GRUB
370
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $689K | ﹤0.01% |
+7,090
| New | +$689K |
|
371
Aptiv
APTV
$17.5B
| $687K | ﹤0.01% |
7,240
+2,712
| +60% | +$257K |
|
372
Editas Medicine
EDIT
$248M
| $683K | ﹤0.01% |
23,095
+19,130
| +482% | +$566K |
|
373
Hartford Financial Services
HIG
$37B
| $681K | ﹤0.01% |
11,216
+3,431
| +44% | +$208K |
|
374
Altice USA
ATUS
$1.05B
| $679K | ﹤0.01% |
24,870
+24,319
| +4,414% | +$664K |
|
375
Amphenol
APH
$135B
| $678K | ﹤0.01% |
25,084
+4,544
| +22% | +$123K |
|