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 | |
|---|---|---|---|---|---|---|
176
PUT
Vanguard S&P 500 ETF
VOO
$979B
| $28.4M | 0.08% |
1,454
+636
| +78% | +$173K |
|
177
PUT
United Parcel Service
UPS
$98.5B
| $28.3M | 0.08% |
2,359
-298
| -11% | -$34.1K |
|
178
PUT
Workday
WDAY
$32.7B
| $28.3M | 0.08% |
1,663
+294
| +21% | +$56.8K |
|
179
PUT
ExxonMobil
XOM
$640B
| $28.1M | 0.08% |
3,975
-840
| -17% | -$60.7K |
|
180
CALL
Las Vegas Sands
LVS
$30B
| $27.9M | 0.08% |
4,839
-29
| -0.6% | -$1.69K |
|
181
CALL
3M
MMM
$89.1B
| $27.5M | 0.08% |
1,997
+492
| +33% | +$68.8K |
|
182
PUT
Deere & Co
DE
$164B
| $27.4M | 0.08% |
1,627
-908
| -36% | -$145K |
|
183
CALL
Western Digital
WDC
$192B
| $27.4M | 0.08% |
6,075
-1,710
| -22% | -$73K |
|
|
184
CALL
FedEx
FDX
$76.6B
| $27.3M | 0.08% |
1,878
-822
| -30% | -$133K |
|
185
PUT
Accenture
ACN
$85.7B
| $27.2M | 0.08% |
1,412
+765
| +118% | +$148K |
|
|
UWC
186
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $26.8M | 0.08% |
4,733
+29
| +0.6% | +$164K |
|
187
CALL
American Tower
AMT
$77.4B
| $26.8M | 0.08% |
1,210
+312
| +35% | +$68.1K |
|
188
CALL
Blackrock
BLK
$164B
| $26.7M | 0.08% |
600
+200
| +50% | +$89.1K |
|
189
CALL
Lam Research
LRCX
$399B
| $26.3M | 0.07% |
11,400
-1,780
| -14% | -$37.4K |
|
|
AGN
190
CALL
DELISTED
Allergan plc
AGN
| $26.3M | 0.07% |
1,562
-1,124
| -42% | -$183K |
|
|
XYZ
191
CALL
Block Inc
XYZ
$46.1B
| $26.2M | 0.07% |
4,233
-635
| -13% | -$43.1K |
|
192
PUT
Fair Isaac
FICO
$28.3B
| $26.2M | 0.07% |
863
+210
| +32% | +$71.1K |
|
193
PUT
Cisco
CSCO
$442B
| $26.1M | 0.07% |
5,287
+277
| +6% | +$14.4K |
|
194
CALL
Gilead Sciences
GILD
$162B
| $26.1M | 0.07% |
4,121
-371
| -8% | -$24.3K |
|
195
CALL
Nike
NKE
$62.6B
| $26M | 0.07% |
2,771
-610
| -18% | -$52.3K |
|
196
PUT
PepsiCo
PEP
$185B
| $25.9M | 0.07% |
1,891
+141
| +8% | +$18.7K |
|
197
CALL
Northrop Grumman
NOC
$74.6B
| $25.9M | 0.07% |
690
+296
| +75% | +$105K |
|
198
PUT
United Rentals
URI
$64.8B
| $25.7M | 0.07% |
2,062
+380
| +23% | +$46.1K |
|
199
CALL
Texas Instruments
TXN
$268B
| $25.7M | 0.07% |
1,988
-653
| -25% | -$80.4K |
|
200
CALL
Target
TGT
$62.6B
| $25.4M | 0.07% |
2,378
+617
| +35% | +$58.7K |
|
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.