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 | |
|---|---|---|---|---|---|---|
901
PUT
Ionis Pharmaceuticals
IONS
$9.23B
| $164K | 0.01% |
265
-118
| -31% | -$7.5K |
|
902
O'Reilly Automotive
ORLY
$71.4B
| $164K | 0.01% |
10,890
-26,175
| -71% | -$388K |
|
|
XEC
903
PUT
DELISTED
CIMAREX ENERGY CO
XEC
| $164K | 0.01% |
107
+81
| +312% | +$9.68K |
|
904
DigitalBridge
DBRG
$2.93B
| $163K | 0.01% |
2,209
+1,874
| +559% | +$159K |
|
|
SPLK
905
CALL
DELISTED
Splunk Inc
SPLK
| $163K | 0.01% |
531
+308
| +138% | +$20.7K |
|
|
CSOD
906
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $163K | 0.01% |
4,687
+3,063
| +189% | +$95.3K |
|
|
CRR
907
DELISTED
Carbo Ceramics Inc.
CRR
| $163K | 0.01% |
3,933
+2,236
| +132% | +$90.1K |
|
|
CSC
908
DELISTED
Computer Sciences
CSC
| $163K | 0.01% |
5,895
+3,486
| +145% | +$97.6K |
|
|
EXXI
909
PUT
DELISTED
ENERGY XXI LTD COM SHS
EXXI
| $163K | 0.01% |
128
-17
| -12% | -$63 |
|
910
Applied Materials
AMAT
$447B
| $162K | 0.01% |
+8,467
| New | +$174K |
|
911
PUT
Avis
CAR
$5.62B
| $162K | 0.01% |
122
-66
| -35% | -$3.48K |
|
912
Commault Systems
CVLT
$5.85B
| $162K | 0.01% |
+3,828
| New | +$173K |
|
913
PUT
Home Depot
HD
$324B
| $162K | 0.01% |
1,280
+1,013
| +379% | +$113K |
|
914
CALL
SLB Ltd
SLB
$70.6B
| $162K | 0.01% |
860
-699
| -45% | -$63.1K |
|
915
Direxion Daily Healthcare Bull 3X ETF
CURE
$174M
| $161K | 0.01% |
+4,112
| New | +$142K |
|
|
TGI
916
DELISTED
Triumph Group
TGI
| $161K | 0.01% |
2,450
+671
| +38% | +$43.5K |
|
|
JOY
917
PUT
DELISTED
Joy Global Inc
JOY
| $161K | 0.01% |
199
-309
| -61% | -$12.4K |
|
|
ADT
918
DELISTED
ADT Corp
ADT
| $161K | 0.01% |
4,822
-4,814
| -50% | -$183K |
|
|
CZR
919
PUT
DELISTED
Caesars Entertainment Corporation
CZR
| $161K | 0.01% |
413
-99
| -19% | -$896 |
|
920
Royal Bank of Canada
RY
$290B
| $160K | 0.01% |
2,628
-10,850
| -81% | -$699K |
|
921
CALL
Occidental Petroleum
OXY
$57.3B
| $159K | 0.01% |
625
+8
| +1% | +$625 |
|
|
ENDP
922
PUT
DELISTED
Endo International plc
ENDP
| $159K | 0.01% |
+255
| New | +$22K |
|
923
Newmont
NEM
$101B
| $158K | 0.01% |
6,784
-7,909
| -54% | -$198K |
|
924
Restaurant Brands International
QSR
$25.1B
| $158K | 0.01% |
4,138
-7,483
| -64% | -$295K |
|
925
Travere Therapeutics
TVTX
$5.27B
| $158K | 0.01% |
+4,796
| New | +$131K |
|
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.