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 | |
|---|---|---|---|---|---|---|
|
326
FedEx
FDX
$74.7B
| $13.6M | 0.04% |
93,530
+93,430
| +93,430% | +$15.1M |
|
327
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $13.6M | 0.04% |
800
+266
| +50% | +$47.1K |
|
|
B
328
CALL
Barrick Mining
B
$62.3B
| $13.5M | 0.04% |
7,788
+3,141
| +68% | +$55.4K |
|
|
SPLK
329
PUT
DELISTED
Splunk Inc
SPLK
| $13.5M | 0.04% |
1,145
+473
| +70% | +$59.1K |
|
330
PUT
DuPont de Nemours
DD
$18.6B
| $13.5M | 0.04% |
1,614
-268
| -14% | -$23.6K |
|
331
CALL
Southwest Airlines
LUV
$21.9B
| $13.3M | 0.04% |
2,470
+895
| +57% | +$46.8K |
|
332
CALL
Atlassian
TEAM
$20.3B
| $13.3M | 0.04% |
1,059
+424
| +67% | +$57.7K |
|
333
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$45.6B
| $13.3M | 0.04% |
+49,244
| New | +$13.1M |
|
334
PUT
HSBC
HSBC
$349B
| $13.2M | 0.04% |
3,462
+1,610
| +87% | +$62.4K |
|
335
CALL
Kroger
KR
$34.2B
| $13.2M | 0.04% |
5,138
+1,107
| +27% | +$25.8K |
|
336
PUT
ConocoPhillips
COP
$146B
| $13.2M | 0.04% |
2,321
+662
| +40% | +$37.7K |
|
|
337
CALL
ConocoPhillips
COP
$146B
| $13.2M | 0.04% |
2,309
+568
| +33% | +$32.3K |
|
|
SIVB
338
PUT
DELISTED
SVB Financial Group
SIVB
| $13.1M | 0.04% |
627
+288
| +85% | +$60.4K |
|
339
CALL
Applied Materials
AMAT
$447B
| $13.1M | 0.04% |
2,618
-1,282
| -33% | -$61.9K |
|
340
PUT
Comcast
CMCSA
$78.3B
| $13M | 0.04% |
2,890
+405
| +16% | +$17.9K |
|
341
PUT
Texas Instruments
TXN
$259B
| $13M | 0.04% |
1,008
-711
| -41% | -$87.6K |
|
342
PUT
Blackstone
BX
$152B
| $13M | 0.04% |
2,665
+1,581
| +146% | +$77.1K |
|
|
COUP
343
CALL
DELISTED
Coupa Software Incorporated
COUP
| $12.9M | 0.04% |
999
+575
| +136% | +$79.6K |
|
344
PUT
O'Reilly Automotive
ORLY
$71.4B
| $12.9M | 0.04% |
4,860
+570
| +13% | +$14.7K |
|
345
PUT
Dollar Tree
DLTR
$22.6B
| $12.8M | 0.04% |
1,123
-223
| -17% | -$23.3K |
|
346
PUT
McKesson
MCK
$96.5B
| $12.7M | 0.04% |
932
+260
| +39% | +$36.9K |
|
347
PUT
Wayfair
W
$10.9B
| $12.7M | 0.04% |
1,136
+24
| +2% | +$3.07K |
|
348
CALL
Okta
OKTA
$23.7B
| $12.5M | 0.04% |
1,269
+492
| +63% | +$61.5K |
|
349
PUT
Charter Communications
CHTR
$15.6B
| $12.5M | 0.04% |
303
-141
| -32% | -$56.9K |
|
|
ALXN
350
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $12.5M | 0.04% |
1,272
-17
| -1% | -$1.92K |
|
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.