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
|
$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 4 |
Alibaba
BABA
|
$9.66M |
| 5 |
Intel
INTC
|
$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
$36.8M |
| 2 |
Gilead Sciences
GILD
|
$31.2M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Sensata Technologies
ST
$4.63B
| $203K | 0.02% |
+3,537
| New | +$203K |
|
|
LGF
427
DELISTED
Lions Gate Entertainment
LGF
| $203K | 0.02% |
+5,994
| New | +$203K |
|
428
Kroger
KR
$44.7B
| $202K | 0.02% |
5,280
+188
| +4% | +$7.19K |
|
|
PTLA
429
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $202K | 0.02% |
5,338
+4,765
| +832% | +$180K |
|
430
Alkermes
ALKS
$4.41B
| $201K | 0.02% |
3,301
+24
| +0.7% | +$1.46K |
|
431
Equifax
EFX
$30.6B
| $201K | 0.02% |
+2,168
| New | +$201K |
|
432
Nucor
NUE
$33.6B
| $201K | 0.02% |
4,246
+3,635
| +595% | +$172K |
|
433
Dick's Sporting Goods
DKS
$18B
| $199K | 0.02% |
3,498
+508
| +17% | +$28.9K |
|
434
W.P. Carey
WPC
$14.8B
| $199K | 0.02% |
2,991
+2,734
| +1,064% | +$182K |
|
|
CXO
435
DELISTED
CONCHO RESOURCES INC.
CXO
| $199K | 0.02% |
1,723
-1,018
| -37% | -$118K |
|
436
DexCom
DXCM
$30.7B
| $197K | 0.02% |
+12,648
| New | +$197K |
|
437
Sempra
SRE
$52.6B
| $197K | 0.02% |
+3,630
| New | +$197K |
|
|
ISIL
438
DELISTED
Intersil Corp
ISIL
| $195K | 0.02% |
+13,681
| New | +$195K |
|
|
STJ
439
DELISTED
St Jude Medical
STJ
| $192K | 0.02% |
+2,938
| New | +$192K |
|
|
DYAX
440
DELISTED
DYAX CORPORATION
DYAX
| $192K | 0.02% |
11,462
+3,348
| +41% | +$56.1K |
|
441
Deckers Outdoor
DECK
$17.5B
| $191K | 0.02% |
+15,786
| New | +$191K |
|
442
Helix Energy Solutions
HLX
$920M
| $191K | 0.02% |
12,777
+10,469
| +454% | +$156K |
|
|
RAX
443
DELISTED
Rackspace Hosting Inc
RAX
| $191K | 0.02% |
3,714
+1,289
| +53% | +$66.3K |
|
444
Regional Management Corp
RM
$422M
| $190K | 0.02% |
12,907
-1,001
| -7% | -$14.7K |
|
445
SPDR S&P Metals & Mining ETF
XME
$2.34B
| $190K | 0.02% |
6,990
-1,610
| -19% | -$43.8K |
|
|
RRMS
446
DELISTED
ROSE ROCK MIDSTREAM L P COM UNIT REPSTG LTD (DE)
RRMS
| $190K | 0.02% |
+4,009
| New | +$190K |
|
447
International Flavors & Fragrances
IFF
$17B
| $188K | 0.02% |
+1,609
| New | +$188K |
|
448
Caesarstone
CSTE
$48.7M
| $187K | 0.02% |
+3,085
| New | +$187K |
|
|
AMJ
449
DELISTED
JP Morgan Alerian MLP Index ETN 5/24/24
AMJ
| $187K | 0.02% |
+4,383
| New | +$187K |
|
|
SNP
450
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $186K | 0.02% |
2,340
-5,330
| -69% | -$424K |
|