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 | |
|---|---|---|---|---|---|---|
|
SNV
1526
CALL
DELISTED
Synovus
SNV
| $1.59M | ﹤0.01% |
446
+41
| +10% | +$1.47K |
|
1527
Masco
MAS
$16B
| $1.59M | ﹤0.01% |
38,189
+3,908
| +11% | +$157K |
|
1528
CALL
Charles River Laboratories
CRL
$10.9B
| $1.59M | ﹤0.01% |
120
-81
| -40% | -$10.9K |
|
1529
ProShares UltraShort S&P500
SDS
$406M
| $1.59M | ﹤0.01% |
2,151
+888
| +70% | +$670K |
|
1530
PUT
Live Nation Entertainment
LYV
$41.2B
| $1.58M | ﹤0.01% |
239
-242
| -50% | -$16.9K |
|
|
GAP
1531
CALL
The Gap Inc
GAP
$6.84B
| $1.58M | ﹤0.01% |
913
+540
| +145% | +$9.59K |
|
1532
Ball Corp
BALL
$17B
| $1.58M | ﹤0.01% |
+21,709
| New | +$1.62M |
|
1533
Clearway Energy Class C
CWEN
$5B
| $1.58M | ﹤0.01% |
86,483
+47,087
| +120% | +$834K |
|
1534
CALL
Omeros
OMER
$709M
| $1.57M | ﹤0.01% |
965
+534
| +124% | +$9.16K |
|
1535
PUT
Telecom Argentina
TEO
$5.89B
| $1.57M | ﹤0.01% |
1,575
+497
| +46% | +$6.56K |
|
|
INXN
1536
CALL
DELISTED
Interxion Holding N.V.
INXN
| $1.57M | ﹤0.01% |
193
-145
| -43% | -$11.3K |
|
1537
PUT
NRG Energy
NRG
$29.8B
| $1.57M | ﹤0.01% |
396
-687
| -63% | -$24.8K |
|
1538
CALL
Knight Transportation
KNX
$11.8B
| $1.56M | ﹤0.01% |
431
-115
| -21% | -$4K |
|
1539
PUT
Manhattan Associates
MANH
$8.97B
| $1.56M | ﹤0.01% |
194
+164
| +547% | +$13.1K |
|
1540
CALL
Sempra
SRE
$60.8B
| $1.56M | ﹤0.01% |
212
-358
| -63% | -$25.1K |
|
1541
PUT
Texas Capital Bancshares
TCBI
$4.31B
| $1.56M | ﹤0.01% |
286
+259
| +959% | +$14.8K |
|
|
AXON
1542
CALL
Axon Enterprise
AXON
$40.5B
| $1.56M | ﹤0.01% |
275
+67
| +32% | +$4.23K |
|
|
CHL
1543
DELISTED
China Mobile Limited
CHL
| $1.56M | ﹤0.01% |
+37,651
| New | +$1.6M |
|
1544
CALL
Interactive Brokers
IBKR
$40.9B
| $1.55M | ﹤0.01% |
1,156
-152
| -12% | -$1.89K |
|
|
PARA
1545
PUT
DELISTED
Paramount Global Class B
PARA
| $1.55M | ﹤0.01% |
385
+205
| +114% | +$9.59K |
|
1546
CALL
LendingTree
TREE
$544M
| $1.55M | ﹤0.01% |
50
+16
| +47% | +$5.45K |
|
1547
PUT
iShares Convertible Bond ETF
ICVT
$7.23B
| $1.55M | ﹤0.01% |
484
-1,201
| -71% | -$71.7K |
|
|
MRTX
1548
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.55M | ﹤0.01% |
199
-66
| -25% | -$6.19K |
|
1549
CALL
Toyota
TM
$210B
| $1.55M | ﹤0.01% |
115
-147
| -56% | -$19.3K |
|
1550
CALL
GoDaddy
GDDY
$12.3B
| $1.54M | ﹤0.01% |
234
-267
| -53% | -$18.1K |
|
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.