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 | |
|---|---|---|---|---|---|---|
1076
TAL Education Group
TAL
$5.74B
| $244K | 0.01% |
11,970
+5,190
| +77% | +$102K |
|
1077
Charles River Laboratories
CRL
$11B
| $243K | 0.01% |
2,406
+2,370
| +6,583% | +$218K |
|
1078
CALL
TripAdvisor
TRIP
$1.57B
| $242K | 0.01% |
1,331
+898
| +207% | +$37.1K |
|
1079
Magnachip Semiconductor
MX
$133M
| $241K | 0.01% |
24,669
+20,963
| +566% | +$188K |
|
1080
CALL
VF Corp
VFC
$6.49B
| $241K | 0.01% |
777
-1,419
| -65% | -$73.2K |
|
1081
PUT
Vipshop
VIPS
$6.92B
| $241K | 0.01% |
1,377
+1,334
| +3,102% | +$17.4K |
|
1082
PUT
Align Technology
ALGN
$12B
| $240K | 0.01% |
761
+381
| +100% | +$51.7K |
|
|
ONCE
1083
CALL
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $240K | 0.01% |
+470
| New | +$26.3K |
|
1084
PUT
3M
MMM
$87.5B
| $239K | 0.01% |
5,796
+3,629
| +167% | +$607K |
|
1085
Arrow Electronics
ARW
$11B
| $238K | 0.01% |
+3,037
| New | +$227K |
|
1086
CALL
Travel + Leisure Co
TNL
$4.5B
| $238K | 0.01% |
972
+739
| +317% | +$32.1K |
|
|
RTN
1087
CALL
DELISTED
Raytheon Company
RTN
| $238K | 0.01% |
649
+331
| +104% | +$52.5K |
|
|
NSM
1088
DELISTED
Nationstar Mortgage Holdings
NSM
| $238K | 0.01% |
13,331
-16,804
| -56% | -$285K |
|
1089
PUT
AB InBev
BUD
$155B
| $237K | 0.01% |
996
-620
| -38% | -$71K |
|
1090
Gogo Inc
GOGO
$510M
| $237K | 0.01% |
20,608
+77
| +0.4% | +$937 |
|
1091
H&R Block
HRB
$5.06B
| $237K | 0.01% |
7,694
-19,257
| -71% | -$505K |
|
1092
NETSCOUT
NTCT
$2.82B
| $237K | 0.01% |
+6,897
| New | +$250K |
|
|
SINA
1093
PUT
DELISTED
Sina Corp
SINA
| $237K | 0.01% |
381
-149
| -28% | -$12.6K |
|
1094
Cirrus Logic
CRUS
$6.74B
| $236K | 0.01% |
3,773
-6,532
| -63% | -$423K |
|
1095
iShares Core MSCI Emerging Markets ETF
IEMG
$152B
| $236K | 0.01% |
4,731
+3,638
| +333% | +$179K |
|
1096
CALL
Kraft Heinz
KHC
$30.1B
| $236K | 0.01% |
1,262
+333
| +36% | +$30.2K |
|
1097
NatWest
NWG
$71B
| $236K | 0.01% |
+33,580
| New | +$235K |
|
|
B
1098
CALL
DELISTED
Barnes Group Inc.
B
| $235K | 0.01% |
+239
| New | +$13.2K |
|
|
QEP
1099
DELISTED
QEP RESOURCES, INC.
QEP
| $235K | 0.01% |
+23,288
| New | +$252K |
|
1100
Scotiabank
BNS
$106B
| $234K | 0.01% |
3,900
+690
| +21% | +$39.5K |
|
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.