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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
PUT
eBay
EBAY
$48.5B
| $172K | 0.01% |
1,720
-2,505
| -59% | -$62.5K |
|
877
PUT
Kinder Morgan
KMI
$72.9B
| $172K | 0.01% |
949
-152
| -14% | -$6.35K |
|
878
PUT
Rio Tinto
RIO
$149B
| $172K | 0.01% |
837
+388
| +86% | +$17K |
|
|
CVRR
879
DELISTED
CVR Refining, LP
CVRR
| $172K | 0.01% |
+9,420
| New | +$189K |
|
880
CALL
Delta Air Lines
DAL
$53.9B
| $171K | 0.01% |
1,516
+818
| +117% | +$35.8K |
|
|
ZEN
881
DELISTED
ZENDESK INC
ZEN
| $171K | 0.01% |
7,723
+5,519
| +250% | +$127K |
|
|
HIFR
882
DELISTED
InfraREIT, Inc.
HIFR
| $171K | 0.01% |
+6,037
| New | +$187K |
|
|
FSL
883
DELISTED
FREESCALE SEMICONDUCTOR LTD
FSL
| $171K | 0.01% |
+4,298
| New | +$178K |
|
884
CarMax
KMX
$8.29B
| $170K | 0.01% |
2,571
-54
| -2% | -$3.85K |
|
885
Larimar Therapeutics
LRMR
$417M
| $170K | 0.01% |
+409
| New | +$171K |
|
|
CERN
886
DELISTED
Cerner Corp
CERN
| $170K | 0.01% |
2,463
-2,169
| -47% | -$152K |
|
|
JCP
887
DELISTED
J.C. Penney Company, Inc.
JCP
| $170K | 0.01% |
+20,182
| New | +$174K |
|
|
EGN
888
DELISTED
Energen
EGN
| $170K | 0.01% |
2,500
+3
| +0.1% | +$209 |
|
|
QLIK
889
DELISTED
QLIK TECHNOLOGIES INC COM STK (DE)
QLIK
| $170K | 0.01% |
+4,871
| New | +$172K |
|
890
CALL
United Airlines
UAL
$37.4B
| $169K | 0.01% |
866
-395
| -31% | -$22.9K |
|
891
CALL
Tower Semiconductor
TSEM
$29.4B
| $168K | 0.01% |
337
+266
| +375% | +$4.26K |
|
|
TFCFA
892
DELISTED
Twenty-First Century Fox, Inc. Class A
TFCFA
| $168K | 0.01% |
+5,191
| New | +$175K |
|
|
AMED
893
DELISTED
Amedisys
AMED
| $167K | 0.01% |
4,216
+3,185
| +309% | +$99.2K |
|
|
ZNH
894
DELISTED
China Southern Airlines Company Limited
ZNH
| $166K | 0.01% |
+2,856
| New | +$143K |
|
895
Criteo
CRTO
$1.05B
| $165K | 0.01% |
+3,480
| New | +$159K |
|
896
PUT
El Pollo Loco
LOCO
$470M
| $165K | 0.01% |
489
+412
| +535% | +$9.99K |
|
897
Vanguard Consumer Staples ETF
VDC
$7.78B
| $165K | 0.01% |
+1,329
| New | +$169K |
|
|
NMBL
898
DELISTED
Nimble Storage, Inc.
NMBL
| $165K | 0.01% |
+5,890
| New | +$154K |
|
899
C.H. Robinson
CHRW
$24.2B
| $164K | 0.01% |
+2,639
| New | +$174K |
|
900
CALL
Home Depot
HD
$324B
| $164K | 0.01% |
448
+184
| +70% | +$20.6K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.