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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CMA
2951
PUT
DELISTED
Comerica
CMA
| $17K | ﹤0.01% |
72
-94
| -57% | -$4.28K |
|
2952
PUT
Ecolab
ECL
$76.2B
| $17K | ﹤0.01% |
23
-102
| -82% | -$11.4K |
|
2953
CALL
Helmerich & Payne
HP
$3.41B
| $17K | ﹤0.01% |
218
-302
| -58% | -$17.1K |
|
2954
CALL
iShares Gold Trust
IAU
$63.3B
| $17K | ﹤0.01% |
+89
| New | +$1.93K |
|
2955
CALL
Idacorp
IDA
$8.23B
| $17K | ﹤0.01% |
+38
| New | +$2.29K |
|
|
BRSL
2956
PUT
Brightstar Lottery PLC
BRSL
$1.95B
| $17K | ﹤0.01% |
+64
| New | +$1.14K |
|
2957
CALL
Ingredion
INGR
$6.42B
| $17K | ﹤0.01% |
225
+215
| +2,150% | +$18.4K |
|
2958
CALL
Liberty Broadband Class A
LBRDA
$4.3B
| $17K | ﹤0.01% |
73
-7
| -9% | -$378 |
|
2959
PUT
LPL Financial
LPLA
$26.6B
| $17K | ﹤0.01% |
+82
| New | +$3.53K |
|
2960
ManpowerGroup
MAN
$2.43B
| $17K | ﹤0.01% |
+213
| New | +$19K |
|
2961
CALL
Mercado Libre
MELI
$93.8B
| $17K | ﹤0.01% |
97
+67
| +223% | +$7.89K |
|
2962
PUT
ArcelorMittal
MT
$50.1B
| $17K | ﹤0.01% |
22
+15
| +214% | +$278 |
|
2963
CALL
NextEra Energy
NEE
$186B
| $17K | ﹤0.01% |
608
+296
| +95% | +$7.53K |
|
2964
PUT
Oceaneering
OII
$5.12B
| $17K | ﹤0.01% |
39
-7
| -15% | -$290 |
|
2965
PUT
Pultegroup
PHM
$24.8B
| $17K | ﹤0.01% |
422
+387
| +1,106% | +$7.88K |
|
2966
RadNet
RDNT
$4.89B
| $17K | ﹤0.01% |
3,137
+3,037
| +3,037% | +$19.6K |
|
2967
PUT
SiriusXM
SIRI
$10.5B
| $17K | ﹤0.01% |
15
+2
| +15% | +$77 |
|
2968
Semtech
SMTC
$11B
| $17K | ﹤0.01% |
1,183
-342
| -22% | -$5.88K |
|
2969
PUT
Sysco
SYY
$40.1B
| $17K | ﹤0.01% |
244
+135
| +124% | +$5.15K |
|
2970
CALL
Truist Financial
TFC
$64.1B
| $17K | ﹤0.01% |
157
+101
| +180% | +$3.9K |
|
2971
ReposiTrak
TRAK
$151M
| $17K | ﹤0.01% |
+1,644
| New | +$20K |
|
2972
PUT
Waste Management
WM
$96.3B
| $17K | ﹤0.01% |
142
+30
| +27% | +$1.5K |
|
|
CDMO
2973
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $17K | ﹤0.01% |
2,403
+2,094
| +678% | +$17.5K |
|
|
EGIO
2974
PUT
DELISTED
Edgio, Inc. Common Stock
EGIO
| $17K | ﹤0.01% |
+1
| New | +$122 |
|
|
TEN
2975
CALL
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $17K | ﹤0.01% |
446
+7
| +2% | +$341 |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.