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 | |
|---|---|---|---|---|---|---|
1201
CALL
Newell Brands
NWL
$2.14B
| $2.13M | 0.01% |
1,049
-38
| -3% | -$892 |
|
|
AKRX
1202
PUT
DELISTED
Akorn Inc
AKRX
| $2.13M | 0.01% |
1,640
+1,018
| +164% | +$16.7K |
|
1203
CALL
Nutrien
NTR
$32.9B
| $2.13M | 0.01% |
369
+132
| +56% | +$7.31K |
|
1204
CALL
Ionis Pharmaceuticals
IONS
$9.23B
| $2.13M | 0.01% |
412
+222
| +117% | +$10.4K |
|
|
BMS
1205
DELISTED
Bemis
BMS
| $2.13M | 0.01% |
43,737
+5,357
| +14% | +$253K |
|
|
K
1206
PUT
DELISTED
Kellanova
K
| $2.12M | 0.01% |
323
-45
| -12% | -$3.03K |
|
|
WRK
1207
CALL
DELISTED
WestRock Company
WRK
| $2.12M | 0.01% |
397
-20
| -5% | -$1.12K |
|
1208
Wayfair
W
$10.9B
| $2.12M | 0.01% |
14,342
+8,683
| +153% | +$1.1M |
|
1209
CALL
Sun Life Financial
SLF
$45.1B
| $2.11M | 0.01% |
531
+15
| +3% | +$600 |
|
1210
Zions Bancorporation
ZION
$10.1B
| $2.11M | 0.01% |
42,040
+6,928
| +20% | +$366K |
|
|
CZR
1211
CALL
DELISTED
Caesars Entertainment Corporation
CZR
| $2.1M | 0.01% |
2,054
+1,377
| +203% | +$14.5K |
|
1212
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.35B
| $2.1M | 0.01% |
23,460
-24,936
| -52% | -$2.25M |
|
1213
CALL
Coty
COTY
$2.29B
| $2.1M | 0.01% |
1,668
-373
| -18% | -$4.83K |
|
1214
CALL
Motorola Solutions
MSI
$67.6B
| $2.1M | 0.01% |
161
-76
| -32% | -$9.4K |
|
|
NBIS
1215
CALL
Nebius Group N.V.
NBIS
$56.1B
| $2.1M | 0.01% |
637
+88
| +16% | +$2.98K |
|
|
EFOR
1216
CALL
Everforth Inc
EFOR
$805M
| $2.08M | 0.01% |
+264
| New | +$22.8K |
|
1217
Newmont
NEM
$101B
| $2.08M | 0.01% |
+69,002
| New | +$2.34M |
|
1218
PUT
Vodafone
VOD
$35.1B
| $2.08M | 0.01% |
960
+742
| +340% | +$17.2K |
|
1219
CALL
WIX.com
WIX
$2.04B
| $2.08M | 0.01% |
174
-191
| -52% | -$20.4K |
|
|
CLR
1220
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $2.08M | 0.01% |
305
+125
| +69% | +$7.89K |
|
1221
CALL
Toyota
TM
$209B
| $2.08M | 0.01% |
167
+142
| +568% | +$18K |
|
1222
PUT
Intercontinental Exchange
ICE
$81B
| $2.07M | 0.01% |
277
+10
| +4% | +$752 |
|
1223
FIVE9
FIVN
$1.67B
| $2.07M | 0.01% |
+47,421
| New | +$1.96M |
|
1224
PUT
Okta
OKTA
$23.7B
| $2.07M | 0.01% |
294
+62
| +27% | +$3.69K |
|
|
ANDX
1225
PUT
DELISTED
Andeavor Logistics LP
ANDX
| $2.07M | 0.01% |
426
+364
| +587% | +$17.1K |
|
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.