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
|
+$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$57.4M |
| 4 |
Citigroup
C
|
+$23.4M |
| 5 |
Goldman Sachs
GS
|
+$23M |
Top Sells
| 1 |
Apple
AAPL
|
+$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$42.2M |
| 4 |
Micron Technology
MU
|
+$26.1M |
| 5 |
Adobe
ADBE
|
+$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
SRCL
351
DELISTED
Stericycle Inc
SRCL
| $745K | ﹤0.01% |
12,709
+8,587
| +208% | +$503K |
|
352
Akamai
AKAM
$11.3B
| $738K | ﹤0.01% |
10,092
-8,496
| -46% | -$621K |
|
353
FibroGen
FGEN
$46.4M
| $733K | ﹤0.01% |
483
-355
| -42% | -$539K |
|
354
Acadia Pharmaceuticals
ACAD
$4.28B
| $728K | ﹤0.01% |
35,073
+9,525
| +37% | +$198K |
|
|
TELL
355
DELISTED
Tellurian Inc.
TELL
| $728K | ﹤0.01% |
+81,256
| New | +$728K |
|
356
Spirit AeroSystems
SPR
$4.8B
| $724K | ﹤0.01% |
+7,898
| New | +$724K |
|
|
KLXI
357
DELISTED
KLX Inc.
KLXI
| $724K | ﹤0.01% |
11,547
+1,530
| +15% | +$95.9K |
|
358
Owens Corning
OC
$12.5B
| $723K | ﹤0.01% |
13,325
+11,809
| +779% | +$641K |
|
359
United States Gasoline Fund
UGA
$77.4M
| $721K | ﹤0.01% |
19,960
+11,609
| +139% | +$419K |
|
|
CBPO
360
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $720K | ﹤0.01% |
9,008
+3,831
| +74% | +$306K |
|
361
GrafTech
EAF
$220M
| $717K | ﹤0.01% |
+3,677
| New | +$717K |
|
|
SLCA
362
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $716K | ﹤0.01% |
38,041
-13,554
| -26% | -$255K |
|
363
Lear
LEA
$5.91B
| $713K | ﹤0.01% |
4,918
+3,319
| +208% | +$481K |
|
|
ITCI
364
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $710K | ﹤0.01% |
32,722
+7,135
| +28% | +$155K |
|
|
SRG
365
Seritage Growth Properties
SRG
$252M
| $707K | ﹤0.01% |
14,904
-12,189
| -45% | -$578K |
|
|
SINA
366
DELISTED
Sina Corp
SINA
| $706K | ﹤0.01% |
10,166
-11,790
| -54% | -$819K |
|
|
SGI
367
Somnigroup International Inc.
SGI
$17.7B
| $700K | ﹤0.01% |
52,980
-54,584
| -51% | -$721K |
|
368
Cenovus Energy
CVE
$29.3B
| $699K | ﹤0.01% |
69,692
+53,094
| +320% | +$533K |
|
369
Nomad Foods
NOMD
$2.13B
| $697K | ﹤0.01% |
+34,452
| New | +$697K |
|
|
WBC
370
DELISTED
WABCO HOLDINGS INC.
WBC
| $696K | ﹤0.01% |
+5,906
| New | +$696K |
|
371
SPDR S&P MidCap 400 ETF Trust
MDY
$23.9B
| $694K | ﹤0.01% |
1,891
+992
| +110% | +$364K |
|
|
DPLO
372
DELISTED
DIPLOMAT PHARMACY, INC.
DPLO
| $693K | ﹤0.01% |
+35,711
| New | +$693K |
|
373
LivaNova
LIVN
$3.21B
| $690K | ﹤0.01% |
+5,570
| New | +$690K |
|
374
Vanguard Total Stock Market ETF
VTI
$530B
| $679K | ﹤0.01% |
+4,543
| New | +$679K |
|
375
Tucows
TCX
$196M
| $677K | ﹤0.01% |
12,150
+6,939
| +133% | +$387K |
|