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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1901
PUT
Invesco CurrencyShares Australian Dollar Trust
FXA
$96.8M
| $1.11M | ﹤0.01% |
157
+134
| +583% | +$9.55K |
|
1902
Encompass Health
EHC
$11.2B
| $1.11M | ﹤0.01% |
23,958
+2,980
| +14% | +$151K |
|
1903
PUT
Copa Holdings
CPA
$5.56B
| $1.11M | ﹤0.01% |
138
+59
| +75% | +$5.19K |
|
1904
CALL
Merit Medical Systems
MMSI
$4.43B
| $1.11M | ﹤0.01% |
180
+173
| +2,471% | +$9.81K |
|
1905
PUT
Perrigo
PRGO
$1.4B
| $1.11M | ﹤0.01% |
231
+75
| +48% | +$3.51K |
|
1906
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.11M | ﹤0.01% |
492
+32
| +7% | +$695 |
|
1907
PUT
H&R Block
HRB
$5.18B
| $1.11M | ﹤0.01% |
464
-17
| -4% | -$418 |
|
1908
PUT
Hilltop Holdings
HTH
$2.29B
| $1.11M | ﹤0.01% |
607
+441
| +266% | +$8.19K |
|
1909
PUT
New York Times
NYT
$11.6B
| $1.1M | ﹤0.01% |
336
+313
| +1,361% | +$9.27K |
|
1910
CALL
Raymond James Financial
RJF
$32.5B
| $1.1M | ﹤0.01% |
206
+113
| +122% | +$6.05K |
|
1911
CALL
Teladoc Health
TDOC
$1.58B
| $1.1M | ﹤0.01% |
198
-33
| -14% | -$2.02K |
|
1912
PUT
F5
FFIV
$22.1B
| $1.1M | ﹤0.01% |
70
-128
| -65% | -$20.6K |
|
1913
Avis
CAR
$5.63B
| $1.09M | ﹤0.01% |
31,432
+12,372
| +65% | +$371K |
|
|
DATA
1914
PUT
DELISTED
Tableau Software, Inc.
DATA
| $1.09M | ﹤0.01% |
86
+10
| +13% | +$1.26K |
|
1915
Herbalife
HLF
$1.23B
| $1.09M | ﹤0.01% |
20,629
-29,118
| -59% | -$1.67M |
|
1916
Sarepta Therapeutics
SRPT
$1.66B
| $1.09M | ﹤0.01% |
9,177
+2,997
| +48% | +$385K |
|
|
SLCA
1917
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $1.09M | ﹤0.01% |
630
+456
| +262% | +$6.54K |
|
|
NVEE
1918
PUT
DELISTED
NV5 Global
NVEE
| $1.09M | ﹤0.01% |
+736
| New | +$12.7K |
|
1919
PUT
Boston Beer
SAM
$1.88B
| $1.09M | ﹤0.01% |
37
-130
| -78% | -$35.6K |
|
|
ARRS
1920
PUT
DELISTED
ARRIS International plc Ordinary Shares
ARRS
| $1.09M | ﹤0.01% |
345
-75
| -18% | -$2.35K |
|
1921
PUT
Zebra Technologies
ZBRA
$12.4B
| $1.09M | ﹤0.01% |
52
-10
| -16% | -$1.88K |
|
|
FL
1922
DELISTED
Foot Locker
FL
| $1.09M | ﹤0.01% |
17,969
-44,988
| -71% | -$2.62M |
|
1923
CALL
Realty Income
O
$61.2B
| $1.09M | ﹤0.01% |
153
-257
| -63% | -$17K |
|
1924
CALL
Inogen
INGN
$167M
| $1.09M | ﹤0.01% |
114
+82
| +256% | +$10.2K |
|
1925
CALL
Iron Mountain
IRM
$38.2B
| $1.08M | ﹤0.01% |
306
+205
| +203% | +$7.24K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.