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 |
Amazon
AMZN
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1126
Tyson Foods
TSN
$20B
| $225K | 0.01% |
3,594
-47,477
| -93% | -$2.91M |
|
1127
PUT
Radware
RDWR
$1.22B
| $224K | 0.01% |
1,319
+244
| +23% | +$4.14K |
|
|
P
1128
PUT
DELISTED
Pandora Media Inc
P
| $224K | 0.01% |
1,080
+72
| +7% | +$693 |
|
1129
CALL
Cisco
CSCO
$444B
| $223K | 0.01% |
4,578
+2,600
| +131% | +$84.7K |
|
|
TPH
1130
DELISTED
Tri Pointe Homes
TPH
| $223K | 0.01% |
16,955
-998
| -6% | -$12.4K |
|
|
BNFT
1131
CALL
DELISTED
Benefitfocus, Inc.
BNFT
| $223K | 0.01% |
527
+455
| +632% | +$14.6K |
|
|
KOL
1132
DELISTED
VanEck Vectors Coal ETF
KOL
| $223K | 0.01% |
1,691
+1,496
| +767% | +$199K |
|
1133
CALL
MBIA
MBI
$293M
| $222K | 0.01% |
2,436
+2,218
| +1,017% | +$18.9K |
|
1134
CALL
Chevron
CVX
$387B
| $219K | 0.01% |
2,473
+1,150
| +87% | +$122K |
|
|
MOMO
1135
CALL
Hello Group
MOMO
$870M
| $219K | 0.01% |
751
+14
| +2% | +$537 |
|
1136
PUT
AstraZeneca
AZN
$261B
| $218K | 0.01% |
927
+418
| +82% | +$27.3K |
|
|
BGFV
1137
DELISTED
Big 5 Sporting Goods
BGFV
| $218K | 0.01% |
16,766
+5,554
| +50% | +$79.7K |
|
1138
PUT
TJX Companies
TJX
$170B
| $218K | 0.01% |
2,816
+1,050
| +59% | +$39.6K |
|
|
NBIS
1139
CALL
Nebius Group N.V.
NBIS
$56.1B
| $218K | 0.01% |
785
+76
| +11% | +$1.98K |
|
|
MDSO
1140
CALL
DELISTED
Medidata Solutions, Inc.
MDSO
| $218K | 0.01% |
226
+211
| +1,407% | +$14.7K |
|
|
REN
1141
PUT
DELISTED
Resolute Energy Corporaton
REN
| $218K | 0.01% |
399
+139
| +53% | +$5.32K |
|
1142
CALL
Lennox International
LII
$18.7B
| $217K | 0.01% |
248
+102
| +70% | +$17.8K |
|
1143
Liquidity Services
LQDT
$1.17B
| $217K | 0.01% |
34,281
+22,025
| +180% | +$153K |
|
1144
PUT
NXP Semiconductors
NXPI
$70B
| $217K | 0.01% |
2,534
+331
| +15% | +$35.5K |
|
1145
CALL
PNC Financial Services
PNC
$99.5B
| $217K | 0.01% |
597
-547
| -48% | -$66K |
|
|
ETP
1146
PUT
DELISTED
Energy Transfer Partners, L.P.
ETP
| $217K | 0.01% |
702
-10
| -1% | -$223 |
|
1147
PUT
CF Industries
CF
$19.5B
| $214K | 0.01% |
877
-546
| -38% | -$15K |
|
1148
Dell
DELL
$284B
| $214K | 0.01% |
+12,521
| New | +$229K |
|
1149
PUT
Las Vegas Sands
LVS
$30.5B
| $214K | 0.01% |
2,453
-838
| -25% | -$50.2K |
|
|
FLXN
1150
CALL
DELISTED
Flexion Therapeutics, Inc.
FLXN
| $214K | 0.01% |
621
+112
| +22% | +$2.33K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.