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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3326
Annaly Capital Management
NLY
$16.9B
| $289K | ﹤0.01% |
7,674
-8,517
| -53% | -$310K |
|
|
WMGI
3327
PUT
DELISTED
Wright Medical Group Inc
WMGI
| $289K | ﹤0.01% |
95
+54
| +132% | +$1.41K |
|
|
XRN
3328
CALL
Chiron Real Estate Inc
XRN
$540M
| $288K | ﹤0.01% |
44
+38
| +633% | +$2.39K |
|
3329
CALL
Turning Point Brands
TPB
$1.52B
| $288K | ﹤0.01% |
101
+11
| +12% | +$276 |
|
|
SRNE
3330
PUT
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $288K | ﹤0.01% |
854
+182
| +27% | +$434 |
|
|
CUB
3331
DELISTED
Cubic Corporation
CUB
| $288K | ﹤0.01% |
+4,542
| New | +$307K |
|
|
HABT
3332
CALL
DELISTED
The Habit Restaurants, Inc. - Class A
HABT
| $288K | ﹤0.01% |
277
+154
| +125% | +$1.53K |
|
3333
CALL
Conduent
CNDT
$234M
| $287K | ﹤0.01% |
463
+383
| +479% | +$2.4K |
|
3334
CALL
Enovis
ENOV
$1.63B
| $287K | ﹤0.01% |
46
+38
| +475% | +$2.15K |
|
3335
CALL
Primerica
PRI
$9.81B
| $287K | ﹤0.01% |
22
+19
| +633% | +$2.45K |
|
|
DLPH
3336
CALL
DELISTED
Delphi Technologies PLC Ordinary Shares
DLPH
| $287K | ﹤0.01% |
224
+82
| +58% | +$1.06K |
|
|
LM
3337
DELISTED
Legg Mason, Inc.
LM
| $287K | ﹤0.01% |
+8,000
| New | +$297K |
|
3338
PUT
Inogen
INGN
$171M
| $286K | ﹤0.01% |
42
-32
| -43% | -$2.01K |
|
3339
Myriad Genetics
MYGN
$515M
| $286K | ﹤0.01% |
10,518
+6,035
| +135% | +$166K |
|
3340
Thomson Reuters
TRI
$42.7B
| $286K | ﹤0.01% |
+3,792
| New | +$276K |
|
|
GRA
3341
PUT
DELISTED
W.R. Grace & Co.
GRA
| $286K | ﹤0.01% |
41
+17
| +71% | +$1.14K |
|
3342
CALL
Aegon
AEG
$13.5B
| $285K | ﹤0.01% |
684
+229
| +50% | +$935 |
|
3343
United States Brent Oil Fund
BNO
$755M
| $285K | ﹤0.01% |
13,693
-1,553
| -10% | -$29.9K |
|
3344
Fox Class A
FOXA
$23.8B
| $285K | ﹤0.01% |
7,709
-8,106
| -51% | -$278K |
|
3345
PUT
Inseego
INSG
$114M
| $285K | ﹤0.01% |
39
+2
| +5% | +$115 |
|
3346
CALL
Dave & Buster's
PLAY
$363M
| $285K | ﹤0.01% |
71
+15
| +27% | +$601 |
|
3347
Verra Mobility
VRRM
$636M
| $285K | ﹤0.01% |
+20,407
| New | +$293K |
|
3348
Zillow
Z
$7.32B
| $285K | ﹤0.01% |
+6,204
| New | +$231K |
|
3349
PUT
Emcor
EME
$33B
| $284K | ﹤0.01% |
+33
| New | +$2.9K |
|
3350
FMC
FMC
$1.39B
| $284K | ﹤0.01% |
+2,851
| New | +$265K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.