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
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1076
PUT
Coty
COTY
$2.29B
| $238K | 0.01% |
717
-75
| -9% | -$1.36K |
|
1077
OneMain Financial
OMF
$6.79B
| $238K | 0.01% |
+8,451
| New | +$226K |
|
|
AY
1078
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $238K | 0.01% |
+12,131
| New | +$252K |
|
1079
PUT
NOV
NOV
$7.22B
| $237K | 0.01% |
596
-543
| -48% | -$17.7K |
|
1080
PTC
PTC
$13.1B
| $237K | 0.01% |
+4,212
| New | +$233K |
|
1081
Dr. Reddy's Laboratories
RDY
$9.83B
| $237K | 0.01% |
33,235
+31,515
| +1,832% | +$227K |
|
|
AIMC
1082
DELISTED
Altra Industrial Motion Corp
AIMC
| $237K | 0.01% |
4,935
+3,503
| +245% | +$155K |
|
1083
CALL
Dollar Tree
DLTR
$22.6B
| $236K | 0.01% |
351
-451
| -56% | -$34.4K |
|
1084
Heritage Insurance Holdings
HRTG
$796M
| $236K | 0.01% |
17,870
+17,735
| +13,137% | +$213K |
|
1085
CALL
Yelp
YELP
$1.35B
| $236K | 0.01% |
400
-31
| -7% | -$1.2K |
|
|
HES
1086
DELISTED
Hess
HES
| $235K | 0.01% |
5,018
-69,116
| -93% | -$2.92M |
|
1087
CALL
Textron
TXT
$16.2B
| $235K | 0.01% |
519
+6
| +1% | +$298 |
|
1088
PUT
TripAdvisor
TRIP
$1.57B
| $234K | 0.01% |
532
-693
| -57% | -$28.2K |
|
1089
CALL
Lear
LEA
$7.14B
| $233K | 0.01% |
113
-64
| -36% | -$9.68K |
|
1090
MasterCraft Boat Holdings
MCFT
$576M
| $233K | 0.01% |
+11,473
| New | +$213K |
|
1091
Viavi Solutions
VIAV
$10.3B
| $232K | 0.01% |
24,534
-65,669
| -73% | -$684K |
|
|
BKS
1092
DELISTED
Barnes & Noble
BKS
| $232K | 0.01% |
+30,587
| New | +$228K |
|
1093
Church & Dwight Co
CHD
$22.8B
| $231K | 0.01% |
+4,777
| New | +$243K |
|
1094
PUT
Whirlpool
WHR
$2.31B
| $231K | 0.01% |
784
+254
| +48% | +$45.4K |
|
1095
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$103M
| $230K | 0.01% |
+143
| New | +$195K |
|
1096
PUT
FedEx
FDX
$74.7B
| $230K | 0.01% |
1,336
-3,255
| -71% | -$693K |
|
1097
CALL
Sinclair Inc
SBGI
$965M
| $230K | 0.01% |
966
+236
| +32% | +$7.4K |
|
1098
CALL
Synchrony
SYF
$23.3B
| $230K | 0.01% |
1,278
+304
| +31% | +$9.09K |
|
|
PTHN
1099
DELISTED
Patheon N.V.
PTHN
| $230K | 0.01% |
6,600
+6,592
| +82,400% | +$230K |
|
1100
PUT
Procter & Gamble
PG
$342B
| $229K | 0.01% |
6,556
-1,118
| -15% | -$102K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.