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 | |
|---|---|---|---|---|---|---|
1176
Teck Resources
TECK
$29.5B
| $135K | 0.01% |
28,140
+27,809
| +8,402% | +$197K |
|
1177
Thermo Fisher Scientific
TMO
$210B
| $135K | 0.01% |
1,109
-6,336
| -85% | -$825K |
|
|
BITA
1178
DELISTED
Bitauto Holdings Limited
BITA
| $135K | 0.01% |
4,552
-2,313
| -34% | -$78.7K |
|
|
CEMP
1179
CALL
DELISTED
Cempra, Inc.
CEMP
| $135K | 0.01% |
513
+242
| +89% | +$8.99K |
|
|
ALTR
1180
CALL
DELISTED
Altera Corp
ALTR
| $135K | 0.01% |
813
-1,682
| -67% | -$83.6K |
|
1181
CALL
AbbVie
ABBV
$459B
| $134K | 0.01% |
736
-1,177
| -62% | -$76.6K |
|
1182
PUT
PNC Financial Services
PNC
$99.9B
| $134K | 0.01% |
592
+509
| +613% | +$47.9K |
|
1183
WEC Energy
WEC
$37.7B
| $134K | 0.01% |
2,579
+2,462
| +2,104% | +$120K |
|
|
AMAG
1184
PUT
DELISTED
AMAG Pharmaceuticals
AMAG
| $134K | 0.01% |
82
+1
| +1% | +$62 |
|
|
PNRA
1185
PUT
DELISTED
Panera Bread Co
PNRA
| $134K | 0.01% |
143
+111
| +347% | +$20.7K |
|
|
FWM
1186
PUT
DELISTED
FAIRWAY GROUP HLDGS CORP CL A COM STK (DE)
FWM
| $134K | 0.01% |
442
+437
| +8,740% | +$1.06K |
|
|
BHR
1187
Braemar Hotels & Resorts
BHR
$153M
| $133K | 0.01% |
9,602
+8,592
| +851% | +$122K |
|
|
EMBJ
1188
PUT
Embraer S.A. ADS
EMBJ
$11.7B
| $133K | 0.01% |
301
+1
| +0.3% | +$27 |
|
|
ODP
1189
PUT
DELISTED
ODP
ODP
| $133K | 0.01% |
138
+127
| +1,155% | +$9.89K |
|
|
CLVS
1190
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $133K | 0.01% |
112
+17
| +18% | +$1.47K |
|
|
ARRY
1191
CALL
DELISTED
Array Biopharma Inc
ARRY
| $133K | 0.01% |
1,638
+1,503
| +1,113% | +$8.91K |
|
|
MRD
1192
PUT
DELISTED
MEMORIAL RESOURCE DEV CORP COM STK (DE)
MRD
| $133K | 0.01% |
+276
| New | +$4.97K |
|
1193
Aramark
ARMK
$15.1B
| $132K | 0.01% |
6,183
+4,463
| +259% | +$102K |
|
1194
Delek Logistics
DKL
$3.07B
| $132K | 0.01% |
+4,399
| New | +$174K |
|
1195
JD.com
JD
$40.7B
| $132K | 0.01% |
5,088
-31,653
| -86% | -$915K |
|
1196
Pfizer
PFE
$141B
| $132K | 0.01% |
4,431
-19,732
| -82% | -$633K |
|
|
ESRX
1197
DELISTED
Express Scripts Holding Company
ESRX
| $132K | 0.01% |
+1,631
| New | +$142K |
|
|
MON
1198
CALL
DELISTED
Monsanto Co
MON
| $132K | 0.01% |
1,150
+1
| +0.1% | +$99 |
|
1199
American Eagle Outfitters
AEO
$2.81B
| $131K | 0.01% |
8,444
-13,240
| -61% | -$226K |
|
1200
CALL
Exelixis
EXEL
$14B
| $131K | 0.01% |
776
+546
| +237% | +$2.97K |
|
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.