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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PBFX
2901
DELISTED
PBF LOGISTICS LP
PBFX
| $381K | ﹤0.01% |
18,059
+9,556
| +112% | +$201K |
|
2902
PUT
Cirrus Logic
CRUS
$6.87B
| $380K | ﹤0.01% |
71
+2
| +3% | +$102 |
|
2903
CALL
iShares Gold Trust
IAU
$63.4B
| $380K | ﹤0.01% |
135
+61
| +82% | +$1.72K |
|
2904
PUT
Vicor
VICR
$9.41B
| $380K | ﹤0.01% |
129
+55
| +74% | +$1.7K |
|
2905
PUT
Dine Brands
DIN
$448M
| $379K | ﹤0.01% |
50
-6
| -11% | -$491 |
|
2906
PUT
Bank OZK
OZK
$5.5B
| $379K | ﹤0.01% |
139
-708
| -84% | -$19.7K |
|
|
SA
2907
CALL
Seabridge Gold
SA
$2.82B
| $379K | ﹤0.01% |
300
+78
| +35% | +$1.11K |
|
2908
PUT
Canadian Natural Resources
CNQ
$93.4B
| $378K | ﹤0.01% |
290
-178
| -38% | -$2.21K |
|
|
SF
2909
CALL
Stifel
SF
$12.5B
| $378K | ﹤0.01% |
149
+104
| +231% | +$2.61K |
|
|
ZNGA
2910
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $378K | ﹤0.01% |
64,960
+21,092
| +48% | +$127K |
|
2911
CALL
Core Laboratories
CLB
$518M
| $377K | ﹤0.01% |
81
-4
| -5% | -$186 |
|
2912
CALL
Fortune Brands Innovations
FBIN
$6.14B
| $377K | ﹤0.01% |
81
+17
| +27% | +$772 |
|
|
FOE
2913
CALL
DELISTED
Ferro Corporation
FOE
| $377K | ﹤0.01% |
+318
| New | +$4.03K |
|
2914
Digimarc Corp
DMRC
$137M
| $376K | ﹤0.01% |
9,623
+8,288
| +621% | +$358K |
|
2915
PUT
Sonos
SONO
$1.87B
| $376K | ﹤0.01% |
281
+72
| +34% | +$900 |
|
2916
PUT
Methanex
MEOH
$4.19B
| $375K | ﹤0.01% |
106
+68
| +179% | +$2.51K |
|
|
MRSH
2917
Marsh
MRSH
$87.5B
| $375K | ﹤0.01% |
3,751
-4,289
| -53% | -$429K |
|
2918
Rayonier Advanced Materials
RYAM
$573M
| $375K | ﹤0.01% |
+86,832
| New | +$371K |
|
2919
Silicon Laboratories
SLAB
$7.17B
| $375K | ﹤0.01% |
+3,369
| New | +$365K |
|
|
SOHU
2920
CALL
Sohu.com
SOHU
$345M
| $374K | ﹤0.01% |
369
+290
| +367% | +$3.41K |
|
|
SPWR
2921
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $374K | ﹤0.01% |
521
-363
| -41% | -$3K |
|
2922
CALL
Casella Waste Systems
CWST
$5.68B
| $373K | ﹤0.01% |
87
+67
| +335% | +$2.9K |
|
2923
CALL
Globe Life
GL
$13.5B
| $373K | ﹤0.01% |
39
+27
| +225% | +$2.45K |
|
2924
PUT
Ingersoll Rand
IR
$33.1B
| $373K | ﹤0.01% |
132
+124
| +1,550% | +$3.83K |
|
|
REGI
2925
PUT
DELISTED
Renewable Energy Group, Inc.
REGI
| $373K | ﹤0.01% |
249
+226
| +983% | +$3.12K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.