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 | |
|---|---|---|---|---|---|---|
1351
PUT
NCR Voyix
VYX
$1.06B
| $2.33M | 0.01% |
1,079
-473
| -30% | -$9.21K |
|
1352
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $2.33M | 0.01% |
382
+111
| +41% | +$6.06K |
|
1353
PUT
Moody's
MCO
$82.4B
| $2.33M | 0.01% |
98
+84
| +600% | +$18.7K |
|
1354
PUT
YPF
YPF
$20.2B
| $2.33M | 0.01% |
2,009
-464
| -19% | -$4.5K |
|
|
DFS
1355
CALL
DELISTED
Discover Financial Services
DFS
| $2.32M | 0.01% |
274
-124
| -31% | -$10.2K |
|
1356
PUT
Itaú Unibanco
ITUB
$91.3B
| $2.32M | 0.01% |
3,491
-2,207
| -39% | -$13.8K |
|
1357
CALL
Ubiquiti
UI
$31.8B
| $2.32M | 0.01% |
123
-85
| -41% | -$13.7K |
|
1358
CALL
Werner Enterprises
WERN
$2.54B
| $2.32M | 0.01% |
638
+566
| +786% | +$20.7K |
|
|
GOOS
1359
CALL
Canada Goose Holdings
GOOS
$868M
| $2.32M | 0.01% |
640
+393
| +159% | +$15.2K |
|
1360
CALL
UBS Group
UBS
$170B
| $2.31M | 0.01% |
1,840
+1,319
| +253% | +$15.7K |
|
1361
CALL
Eastman Chemical
EMN
$7.8B
| $2.31M | 0.01% |
291
-234
| -45% | -$18K |
|
1362
PUT
Parker-Hannifin
PH
$125B
| $2.31M | 0.01% |
112
-169
| -60% | -$32.7K |
|
|
PXD
1363
DELISTED
Pioneer Natural Resource Co.
PXD
| $2.3M | 0.01% |
15,185
+13,741
| +952% | +$1.83M |
|
1364
Texas Roadhouse
TXRH
$12.7B
| $2.3M | 0.01% |
+40,794
| New | +$2.24M |
|
1365
PUT
Agios Pharmaceuticals
AGIO
$2.16B
| $2.3M | 0.01% |
481
-352
| -42% | -$13.3K |
|
1366
CALL
Crown Holdings
CCK
$12.8B
| $2.29M | 0.01% |
316
+192
| +155% | +$13.7K |
|
1367
CALL
Hershey
HSY
$35.4B
| $2.29M | 0.01% |
156
-326
| -68% | -$48.3K |
|
1368
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $2.29M | 0.01% |
351
+90
| +34% | +$5.7K |
|
1369
iShares 7-10 Year Treasury Bond ETF
IEF
$47.1B
| $2.29M | 0.01% |
20,794
-7,904
| -28% | -$881K |
|
1370
CALL
Deutsche Bank
DB
$66.3B
| $2.29M | 0.01% |
2,943
-568
| -16% | -$4.26K |
|
1371
PUT
Huntington Ingalls Industries
HII
$11.3B
| $2.28M | 0.01% |
91
-51
| -36% | -$12.1K |
|
1372
PUT
Merit Medical Systems
MMSI
$4.43B
| $2.28M | 0.01% |
731
+718
| +5,523% | +$20.6K |
|
1373
PUT
TD Synnex
SNX
$19.4B
| $2.28M | 0.01% |
354
+220
| +164% | +$13.3K |
|
|
KYNB
1374
Kyntra Bio
KYNB
$28.5M
| $2.27M | 0.01% |
2,117
+1,821
| +615% | +$1.86M |
|
1375
CALL
Fortinet
FTNT
$112B
| $2.26M | ﹤0.01% |
1,060
+185
| +21% | +$3.48K |
|
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.