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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1951
CALL
TAL Education Group
TAL
$5.71B
| $946K | ﹤0.01% |
368
+263
| +250% | +$8.5K |
|
1952
PUT
BOK Financial
BOKF
$8.64B
| $943K | ﹤0.01% |
97
+68
| +234% | +$6.79K |
|
1953
McCormick & Company Non-Voting
MKC
$13.4B
| $943K | ﹤0.01% |
+14,326
| New | +$884K |
|
1954
CALL
LiveRamp
RAMP
$2.29B
| $942K | ﹤0.01% |
793
+732
| +1,200% | +$32.4K |
|
1955
CALL
Arch Capital
ACGL
$36.1B
| $941K | ﹤0.01% |
316
+76
| +32% | +$2.26K |
|
1956
CALL
AvalonBay Communities
AVB
$27.1B
| $941K | ﹤0.01% |
52
-71
| -58% | -$12.7K |
|
1957
PUT
Talos Energy
TALO
$2.49B
| $941K | ﹤0.01% |
287
+96
| +50% | +$3.23K |
|
1958
CALL
Macerich
MAC
$7.32B
| $939K | ﹤0.01% |
170
+29
| +21% | +$1.67K |
|
|
PE
1959
CALL
DELISTED
PARSLEY ENERGY INC
PE
| $938K | ﹤0.01% |
321
+48
| +18% | +$1.43K |
|
1960
Fidelity National Information Services
FIS
$21.5B
| $937K | ﹤0.01% |
8,598
-13,092
| -60% | -$1.41M |
|
1961
PUT
Labcorp
LH
$24.3B
| $937K | ﹤0.01% |
63
-21
| -25% | -$3.19K |
|
1962
CALL
Energous
WATT
$80.3M
| $937K | ﹤0.01% |
2
+1
| +100% | +$7.76K |
|
|
AHL
1963
PUT
DELISTED
ASPEN Insurance Holding Limited
AHL
| $936K | ﹤0.01% |
224
+213
| +1,936% | +$8.51K |
|
|
KYNB
1964
CALL
Kyntra Bio
KYNB
$28.5M
| $935K | ﹤0.01% |
6
-3
| -33% | -$4.62K |
|
1965
CALL
Chemours
CC
$2.59B
| $934K | ﹤0.01% |
237
-99
| -29% | -$4.33K |
|
1966
PUT
Caesarstone
CSTE
$72.3M
| $934K | ﹤0.01% |
504
+220
| +77% | +$3.86K |
|
1967
PUT
SiriusXM
SIRI
$10B
| $934K | ﹤0.01% |
148
+78
| +111% | +$5.43K |
|
1968
PUT
Xylem
XYL
$28.5B
| $934K | ﹤0.01% |
117
+62
| +113% | +$4.63K |
|
1969
CALL
Sunrun
RUN
$2.37B
| $933K | ﹤0.01% |
750
+311
| +71% | +$4.3K |
|
1970
CALL
SM Energy
SM
$7.96B
| $933K | ﹤0.01% |
296
-172
| -37% | -$4.94K |
|
|
EBIX
1971
CALL
DELISTED
Ebix Inc
EBIX
| $933K | ﹤0.01% |
118
+24
| +26% | +$1.91K |
|
|
AMRS
1972
PUT
DELISTED
Amyris Inc.
AMRS
| $930K | ﹤0.01% |
1,172
+732
| +166% | +$5.38K |
|
1973
CALL
MKS Inc
MKSI
$22.2B
| $929K | ﹤0.01% |
116
-26
| -18% | -$2.38K |
|
|
NVO
1974
CALL
Novo Nordisk
NVO
$216B
| $928K | ﹤0.01% |
394
+206
| +110% | +$5.03K |
|
1975
Albemarle
ALB
$13.5B
| $927K | ﹤0.01% |
+9,292
| New | +$899K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.