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 | |
|---|---|---|---|---|---|---|
|
UNIT
2251
PUT
Uniti Group
UNIT
$2.63B
| $614K | ﹤0.01% |
307
-112
| -27% | -$2.18K |
|
2252
CALL
Matador Resources
MTDR
$6.31B
| $613K | ﹤0.01% |
204
+67
| +49% | +$2.02K |
|
2253
PUT
LiveRamp
RAMP
$2.29B
| $613K | ﹤0.01% |
205
-357
| -64% | -$9.78K |
|
2254
PUT
Talos Energy
TALO
$2.49B
| $613K | ﹤0.01% |
+191
| New | +$6.24K |
|
|
CCMP
2255
CALL
DELISTED
CMC Materials, Inc. Common Stock
CCMP
| $613K | ﹤0.01% |
57
-13
| -19% | -$1.43K |
|
2256
PUT
Fate Therapeutics
FATE
$281M
| $612K | ﹤0.01% |
540
+131
| +32% | +$1.44K |
|
2257
AMC Entertainment Holdings
AMC
$2.03B
| $611K | ﹤0.01% |
+3,844
| New | +$619K |
|
|
INXN
2258
PUT
DELISTED
Interxion Holding N.V.
INXN
| $611K | ﹤0.01% |
98
+76
| +345% | +$4.86K |
|
2259
PUT
Tanger
SKT
$4.82B
| $610K | ﹤0.01% |
260
+25
| +11% | +$550 |
|
2260
CALL
NETSCOUT
NTCT
$2.86B
| $608K | ﹤0.01% |
205
-223
| -52% | -$6.2K |
|
2261
PUT
TD Synnex
SNX
$19.4B
| $608K | ﹤0.01% |
126
-98
| -44% | -$5.22K |
|
2262
Bath & Body Works
BBWI
$4.01B
| $607K | ﹤0.01% |
+20,386
| New | +$589K |
|
2263
CALL
Revvity
RVTY
$12.3B
| $607K | ﹤0.01% |
83
+38
| +84% | +$2.85K |
|
|
KLXI
2264
DELISTED
KLX Inc.
KLXI
| $607K | ﹤0.01% |
+10,017
| New | +$614K |
|
2265
CALL
Cleveland-Cliffs
CLF
$6.81B
| $606K | ﹤0.01% |
720
-671
| -48% | -$5.34K |
|
|
NBL
2266
PUT
DELISTED
Noble Energy, Inc.
NBL
| $606K | ﹤0.01% |
172
+7
| +4% | +$238 |
|
|
CYBR
2267
CALL
DELISTED
CyberArk
CYBR
| $604K | ﹤0.01% |
96
-16,562
| -99% | -$967K |
|
2268
CALL
Norwegian Cruise Line
NCLH
$8.89B
| $604K | ﹤0.01% |
128
-268
| -68% | -$14.1K |
|
|
XL
2269
PUT
DELISTED
XL Group Ltd.
XL
| $604K | ﹤0.01% |
108
-289
| -73% | -$16.1K |
|
|
MMP
2270
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $603K | ﹤0.01% |
8,740
+8,426
| +2,683% | +$566K |
|
|
DERM
2271
DELISTED
Dermira, Inc.
DERM
| $603K | ﹤0.01% |
65,622
+59,017
| +894% | +$550K |
|
2272
PUT
TransUnion
TRU
$14.8B
| $601K | ﹤0.01% |
+84
| New | +$5.6K |
|
|
CLR
2273
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $600K | ﹤0.01% |
9,267
-443
| -5% | -$28.6K |
|
2274
W.W. Grainger
GWW
$65.3B
| $598K | ﹤0.01% |
+1,942
| New | +$580K |
|
2275
PUT
Suncor Energy
SU
$77.7B
| $597K | ﹤0.01% |
147
+47
| +47% | +$1.83K |
|
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.