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 |
Alphabet (Google) Class C
GOOG
|
$54.1M |
| 2 |
Apple
AAPL
|
$28.6M |
| 3 |
Meta Platforms (Facebook)
META
|
$16.5M |
| 4 |
IBM
IBM
|
$13.4M |
| 5 |
Baidu
BIDU
|
$10.3M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 2 |
McDonald's
MCD
|
$8.52M |
| 3 |
Ralph Lauren
RL
|
$5.22M |
| 4 |
Intel
INTC
|
$4.74M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
$4.67M |
Sector Composition
| 1 | Communication Services | 22.01% |
| 2 | Technology | 15.83% |
| 3 | Healthcare | 11.95% |
| 4 | Consumer Discretionary | 9.73% |
| 5 | Financials | 7.98% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
AAIC
376
DELISTED
Arlington Asset Investment Corp.
AAIC
| $283K | 0.02% |
14,479
+8,281
| +134% | +$162K |
|
|
DNB
377
DELISTED
Dun & Bradstreet
DNB
| $283K | 0.02% |
+2,324
| New | +$283K |
|
378
Jack in the Box
JACK
$386M
| $282K | 0.02% |
3,207
+2,671
| +498% | +$235K |
|
379
GameStop
GME
$10.1B
| $281K | 0.02% |
+26,256
| New | +$281K |
|
380
Herc Holdings
HRI
$4.6B
| $281K | 0.02% |
5,180
-3,637
| -41% | -$197K |
|
381
Incyte
INCY
$16.9B
| $281K | 0.02% |
2,705
-946
| -26% | -$98.3K |
|
382
Scholastic
SCHL
$654M
| $281K | 0.02% |
6,369
+6,331
| +16,661% | +$279K |
|
383
Stanley Black & Decker
SWK
$12.1B
| $279K | 0.02% |
2,658
-5,070
| -66% | -$532K |
|
384
Consumers Staples Select Sector SPDR Fund
XLP
$15.8B
| $278K | 0.02% |
5,842
+3,033
| +108% | +$144K |
|
|
SNR
385
DELISTED
NEW SENIOR INVESTMENT GROUP INC.
SNR
| $278K | 0.02% |
+20,802
| New | +$278K |
|
386
Precigen
PGEN
$1.3B
| $277K | 0.02% |
+5,731
| New | +$277K |
|
|
CBM
387
DELISTED
Cambrex Corporation
CBM
| $277K | 0.02% |
6,324
-563
| -8% | -$24.7K |
|
388
Sprouts Farmers Market
SFM
$13.6B
| $276K | 0.02% |
10,258
-370
| -3% | -$9.96K |
|
389
Aflac
AFL
$57.2B
| $275K | 0.02% |
+8,852
| New | +$275K |
|
|
LL
390
DELISTED
LL Flooring Holdings, Inc.
LL
| $275K | 0.02% |
+13,312
| New | +$275K |
|
391
Direxion Daily Emerging Markets Bull 3X Shares
EDC
$86.4M
| $274K | 0.02% |
3,011
+1,609
| +115% | +$146K |
|
392
Canadian National Railway
CNI
$60.3B
| $273K | 0.02% |
4,742
+4,238
| +841% | +$244K |
|
393
Sarepta Therapeutics
SRPT
$1.96B
| $273K | 0.02% |
8,998
-9,580
| -52% | -$291K |
|
394
El Pollo Loco
LOCO
$314M
| $272K | 0.02% |
13,161
+10,346
| +368% | +$214K |
|
395
NiSource
NI
$19B
| $270K | 0.02% |
15,125
+1,461
| +11% | +$26.1K |
|
396
Dorman Products
DORM
$5B
| $269K | 0.02% |
+5,647
| New | +$269K |
|
397
AstraZeneca
AZN
$253B
| $265K | 0.02% |
+8,328
| New | +$265K |
|
|
WPZ
398
DELISTED
Williams Partners L.P.
WPZ
| $265K | 0.02% |
5,479
+416
| +8% | +$20.1K |
|
|
GAP
399
The Gap, Inc.
GAP
$8.83B
| $263K | 0.02% |
6,893
-2,883
| -29% | -$110K |
|
|
ARII
400
DELISTED
American Railcar Industries, Inc.
ARII
| $262K | 0.02% |
+5,407
| New | +$262K |
|