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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2326
iShares MSCI Turkey ETF
TUR
$206M
| $766K | ﹤0.01% |
28,294
-687
| -2% | -$17.7K |
|
2327
Xcel Energy
XEL
$51B
| $766K | ﹤0.01% |
+12,077
| New | +$756K |
|
2328
Hewlett Packard
HPE
$63.2B
| $765K | ﹤0.01% |
48,264
+46,041
| +2,071% | +$736K |
|
2329
Parker-Hannifin
PH
$125B
| $765K | ﹤0.01% |
3,718
+2,683
| +259% | +$520K |
|
2330
CALL
Sun Communities
SUI
$15B
| $765K | ﹤0.01% |
51
-36
| -41% | -$5.61K |
|
|
2331
CALL
Hewlett Packard
HPE
$63.2B
| $764K | ﹤0.01% |
482
+250
| +108% | +$3.99K |
|
|
TPH
2332
CALL
DELISTED
Tri Pointe Homes
TPH
| $764K | ﹤0.01% |
491
+487
| +12,175% | +$7.5K |
|
2333
CALL
Allogene Therapeutics
ALLO
$601M
| $763K | ﹤0.01% |
294
+223
| +314% | +$6.14K |
|
2334
PUT
Darden Restaurants
DRI
$22.5B
| $763K | ﹤0.01% |
70
-23
| -25% | -$2.61K |
|
|
GBT
2335
PUT
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $763K | ﹤0.01% |
96
-33
| -26% | -$1.96K |
|
2336
PUT
HealthEquity
HQY
$7.91B
| $762K | ﹤0.01% |
103
-271
| -72% | -$16.9K |
|
2337
PUT
QuinStreet
QNST
$870M
| $762K | ﹤0.01% |
498
-13
| -3% | -$185 |
|
2338
PUT
SSR Mining
SSRM
$5.57B
| $762K | ﹤0.01% |
396
-173
| -30% | -$2.69K |
|
2339
PUT
Toll Brothers
TOL
$14B
| $762K | ﹤0.01% |
193
-73
| -27% | -$2.92K |
|
2340
HDFC Bank
HDB
$119B
| $761K | ﹤0.01% |
+24,026
| New | +$732K |
|
2341
Mohawk Industries
MHK
$6.9B
| $760K | ﹤0.01% |
+5,575
| New | +$758K |
|
2342
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $760K | ﹤0.01% |
61
-289
| -83% | -$35K |
|
2343
New Oriental
EDU
$7.84B
| $759K | ﹤0.01% |
6,262
+2,080
| +50% | +$249K |
|
|
GRFS
2344
CALL
Grifois
GRFS
$5.16B
| $759K | ﹤0.01% |
326
-165
| -34% | -$3.6K |
|
2345
CALL
GoPro
GPRO
$116M
| $758K | ﹤0.01% |
1,747
+1,323
| +312% | +$5.49K |
|
2346
CALL
LendingTree
TREE
$544M
| $758K | ﹤0.01% |
25
-25
| -50% | -$8.27K |
|
|
DCPH
2347
DELISTED
Deciphera Pharmaceuticals, Inc. Common Stock
DCPH
| $758K | ﹤0.01% |
12,184
+9,920
| +438% | +$471K |
|
|
NVEE
2348
DELISTED
NV5 Global
NVEE
| $757K | ﹤0.01% |
60,024
+59,780
| +24,500% | +$871K |
|
2349
CALL
Sonos
SONO
$1.75B
| $757K | ﹤0.01% |
485
+82
| +20% | +$1.14K |
|
|
NS
2350
PUT
DELISTED
NuStar Energy L.P.
NS
| $754K | ﹤0.01% |
292
+117
| +67% | +$3.26K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.