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
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3726
CNA Financial
CNA
$15B
| $163K | ﹤0.01% |
3,576
+2,037
| +132% | +$98.4K |
|
3727
Carriage Services
CSV
$648M
| $163K | ﹤0.01% |
6,643
-9,501
| -59% | -$247K |
|
|
HPP
3728
Hudson Pacific Properties
HPP
$765M
| $163K | ﹤0.01% |
661
+166
| +34% | +$39.2K |
|
3729
PUT
Jabil
JBL
$31.7B
| $163K | ﹤0.01% |
59
+26
| +79% | +$730 |
|
3730
CALL
Old Republic International
ORI
$10.8B
| $163K | ﹤0.01% |
82
-49
| -37% | -$1.03K |
|
3731
Ring Energy
REI
$287M
| $163K | ﹤0.01% |
12,988
+6,578
| +103% | +$95.6K |
|
3732
Clearwater Paper
CLW
$282M
| $162K | ﹤0.01% |
7,021
-11,965
| -63% | -$328K |
|
3733
CALL
Hyatt Hotels
H
$17.8B
| $162K | ﹤0.01% |
21
-75
| -78% | -$5.97K |
|
3734
Vornado Realty Trust
VNO
$7.54B
| $162K | ﹤0.01% |
2,205
-5,948
| -73% | -$411K |
|
3735
CALL
ZTO Express
ZTO
$18.2B
| $162K | ﹤0.01% |
81
-543
| -87% | -$9.79K |
|
|
NE
3736
PUT
DELISTED
Noble Corporation
NE
| $162K | ﹤0.01% |
256
+179
| +232% | +$916 |
|
3737
Nelnet
NNI
$4.92B
| $161K | ﹤0.01% |
2,761
-1,778
| -39% | -$103K |
|
3738
CALL
Smith & Wesson
SWBI
$657M
| $161K | ﹤0.01% |
174
-24
| -12% | -$216 |
|
3739
PUT
TechTarget
TTGT
$323M
| $161K | ﹤0.01% |
+57
| New | +$1.36K |
|
3740
PUT
Veeco
VECO
$2.79B
| $161K | ﹤0.01% |
113
-29
| -20% | -$480 |
|
|
SPPI
3741
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $161K | ﹤0.01% |
+7,694
| New | +$143K |
|
|
INAP
3742
DELISTED
Internap Corporation
INAP
| $161K | ﹤0.01% |
15,496
+14,982
| +2,915% | +$171K |
|
3743
PUT
Boise Cascade
BCC
$2.83B
| $160K | ﹤0.01% |
36
-2
| -5% | -$88 |
|
|
ELME
3744
PUT
Elme Communities
ELME
$142M
| $160K | ﹤0.01% |
53
| – | – |
|
3745
Cheniere Energy
LNG
$52.8B
| $160K | ﹤0.01% |
2,456
-35,178
| -93% | -$2.17M |
|
3746
Travelzoo
TZOO
$77.8M
| $160K | ﹤0.01% |
+9,385
| New | +$126K |
|
|
KAMN
3747
CALL
DELISTED
Kaman Corp
KAMN
| $160K | ﹤0.01% |
23
-70
| -75% | -$4.73K |
|
|
VER
3748
PUT
DELISTED
VEREIT, Inc.
VER
| $160K | ﹤0.01% |
43
| – | – |
|
3749
PUT
KNOT Offshore Partners
KNOP
$352M
| $159K | ﹤0.01% |
72
-25
| -26% | -$519 |
|
|
LOMA
3750
PUT
Loma Negra
LOMA
$1.34B
| $159K | ﹤0.01% |
155
-276
| -64% | -$4.55K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.