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 | |
|---|---|---|---|---|---|---|
1026
CEVA Inc
CEVA
$1.08B
| $262K | 0.01% |
+5,767
| New | +$237K |
|
1027
Teradyne
TER
$58.5B
| $262K | 0.01% |
8,754
-32,367
| -79% | -$1.09M |
|
1028
CALL
Tapestry
TPR
$28.1B
| $262K | 0.01% |
562
-338
| -38% | -$14.8K |
|
1029
Valmont Industries
VMI
$9.49B
| $262K | 0.01% |
1,754
+410
| +31% | +$61.6K |
|
1030
CALL
Whirlpool
WHR
$2.31B
| $262K | 0.01% |
326
+84
| +35% | +$15.4K |
|
1031
CALL
NRG Energy
NRG
$30.2B
| $261K | 0.01% |
920
-5
| -0.5% | -$84 |
|
|
MDCO
1032
DELISTED
Medicines Co
MDCO
| $261K | 0.01% |
6,871
-29,149
| -81% | -$1.3M |
|
1033
Edgewell Personal Care
EPC
$1.23B
| $260K | 0.01% |
+3,430
| New | +$252K |
|
1034
Agnico Eagle Mines
AEM
$72.3B
| $259K | 0.01% |
5,743
-21,618
| -79% | -$1.01M |
|
1035
CALL
Globant
GLOB
$1.32B
| $259K | 0.01% |
362
-94
| -21% | -$3.63K |
|
1036
PUT
GoPro
GPRO
$119M
| $259K | 0.01% |
1,592
-801
| -33% | -$6.78K |
|
1037
RingCentral
RNG
$3.24B
| $259K | 0.01% |
+7,087
| New | +$234K |
|
1038
Century Aluminum
CENX
$4.59B
| $258K | 0.01% |
+16,600
| New | +$232K |
|
1039
CALL
Emerson Electric
EMR
$81.2B
| $257K | 0.01% |
1,485
+778
| +110% | +$46.1K |
|
|
MB
1040
DELISTED
MINDBODY, Inc. Class A Common Stock
MB
| $257K | 0.01% |
+9,452
| New | +$260K |
|
|
TIME
1041
PUT
DELISTED
Time Inc.
TIME
| $257K | 0.01% |
547
-52
| -9% | -$776 |
|
1042
Assembly Biosciences
ASMB
$500M
| $256K | 0.01% |
1,035
-374
| -27% | -$105K |
|
1043
PUT
Brinker International
EAT
$7.93B
| $255K | 0.01% |
965
+746
| +341% | +$31K |
|
1044
Enovis
ENOV
$1.5B
| $255K | 0.01% |
3,774
+1,791
| +90% | +$122K |
|
1045
Louisiana-Pacific
LPX
$5.04B
| $255K | 0.01% |
+10,589
| New | +$258K |
|
|
YRD
1046
Yiren Digital
YRD
$106M
| $255K | 0.01% |
10,202
+5,216
| +105% | +$127K |
|
1047
PUT
Honeywell
HON
$78B
| $254K | 0.01% |
1,911
-161
| -8% | -$19K |
|
1048
PUT
Sinclair Inc
SBGI
$965M
| $254K | 0.01% |
787
+663
| +535% | +$23.9K |
|
|
AVXS
1049
CALL
DELISTED
AveXis, Inc. Common Stock
AVXS
| $254K | 0.01% |
367
+129
| +54% | +$9.67K |
|
|
WES
1050
DELISTED
Western Gas Partners Lp
WES
| $254K | 0.01% |
+4,542
| New | +$258K |
|
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.