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
|
+$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$26.1M |
| 4 |
Booking.com
BKNG
|
+$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$42.8M |
| 2 |
Amgen
AMGN
|
+$32.3M |
| 3 |
Baidu
BIDU
|
+$21.9M |
| 4 |
Micron Technology
MU
|
+$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
+$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
XLRN
451
DELISTED
Acceleron Pharma Inc.
XLRN
| $402K | 0.02% |
+10,787
| New | +$402K |
|
452
Carnival PLC
CUK
$37.9B
| $401K | 0.02% |
+6,231
| New | +$401K |
|
453
American Axle
AXL
$711M
| $398K | 0.02% |
+22,685
| New | +$398K |
|
454
Silicon Motion
SIMO
$2.85B
| $398K | 0.02% |
8,292
+4,534
| +121% | +$218K |
|
|
SYT
455
DELISTED
Syngenta Ag
SYT
| $395K | 0.02% |
+4,293
| New | +$395K |
|
|
SRCI
456
DELISTED
SRC Energy Inc
SRCI
| $392K | 0.02% |
+40,580
| New | +$392K |
|
457
Hilton Worldwide
HLT
$64.7B
| $388K | 0.02% |
5,588
-27,091
| -83% | -$1.88M |
|
458
Qorvo
QRVO
$8.53B
| $386K | 0.02% |
5,467
-2,239
| -29% | -$158K |
|
459
Edison International
EIX
$21.1B
| $385K | 0.02% |
4,993
+2,011
| +67% | +$155K |
|
460
Alkermes
ALKS
$4.6B
| $384K | 0.02% |
7,563
+5,103
| +207% | +$259K |
|
|
AKAO
461
DELISTED
Achaogen, Inc.
AKAO
| $383K | 0.02% |
24,063
+22,763
| +1,751% | +$362K |
|
462
Clorox
CLX
$15.4B
| $382K | 0.02% |
2,898
-8,762
| -75% | -$1.15M |
|
463
Brinker International
EAT
$6.93B
| $381K | 0.02% |
11,963
+3,950
| +49% | +$126K |
|
464
Garmin
GRMN
$45.9B
| $381K | 0.02% |
7,067
-14,671
| -67% | -$791K |
|
465
Tucows
TCX
$196M
| $381K | 0.02% |
6,521
-14,145
| -68% | -$826K |
|
|
CALA
466
DELISTED
Calithera Biosciences, Inc
CALA
| $377K | 0.02% |
1,198
-703
| -37% | -$221K |
|
467
Cheesecake Factory
CAKE
$2.94B
| $376K | 0.02% |
8,929
+5,657
| +173% | +$238K |
|
468
Nutanix
NTNX
$20.3B
| $376K | 0.02% |
16,816
+15,966
| +1,878% | +$357K |
|
469
Akamai
AKAM
$11.2B
| $375K | 0.02% |
7,706
-17,156
| -69% | -$835K |
|
|
GPOR
470
DELISTED
Gulfport Energy Corp.
GPOR
| $373K | 0.02% |
26,069
+25,940
| +20,109% | +$371K |
|
471
Vail Resorts
MTN
$5.48B
| $372K | 0.02% |
+1,631
| New | +$372K |
|
|
VSI
472
DELISTED
Vitamin Shoppe Inc.
VSI
| $372K | 0.02% |
+69,569
| New | +$372K |
|
473
Impinj
PI
$5.68B
| $370K | 0.02% |
8,899
+5,162
| +138% | +$215K |
|
474
LGI Homes
LGIH
$1.45B
| $368K | 0.02% |
+7,592
| New | +$368K |
|
|
NUVA
475
DELISTED
NuVasive, Inc.
NUVA
| $368K | 0.02% |
6,638
+3,993
| +151% | +$221K |
|