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 | |
|---|---|---|---|---|---|---|
1376
CALL
Floor & Decor
FND
$5.81B
| $2.26M | ﹤0.01% |
445
+179
| +67% | +$8.39K |
|
|
TWO
1377
CALL
Two Harbors Investment
TWO
$1.27B
| $2.26M | ﹤0.01% |
387
+80
| +26% | +$4.53K |
|
1378
CALL
Lattice Semiconductor
LSCC
$17.6B
| $2.26M | ﹤0.01% |
1,181
-268
| -18% | -$5.14K |
|
1379
CALL
ICICI Bank
IBN
$106B
| $2.26M | ﹤0.01% |
1,497
+7
| +0.5% | +$95 |
|
1380
PUT
OSI Systems
OSIS
$3.57B
| $2.26M | ﹤0.01% |
224
-413
| -65% | -$40.8K |
|
1381
PUT
Tyler Technologies
TYL
$12.2B
| $2.25M | ﹤0.01% |
75
-56
| -43% | -$15.6K |
|
|
RETA
1382
PUT
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $2.25M | ﹤0.01% |
110
-4
| -4% | -$730 |
|
|
BLUE
1383
DELISTED
bluebird bio
BLUE
| $2.25M | ﹤0.01% |
1,977
+1,553
| +366% | +$1.69M |
|
1384
PUT
Hormel Foods
HRL
$13.9B
| $2.25M | ﹤0.01% |
498
+27
| +6% | +$1.16K |
|
1385
CALL
Casey's General Stores
CASY
$31.9B
| $2.24M | ﹤0.01% |
141
-12
| -8% | -$1.99K |
|
1386
CALL
Ascendis Pharma A/S
ASND
$16.7B
| $2.24M | ﹤0.01% |
161
+139
| +632% | +$15.4K |
|
|
BFYT
1387
PUT
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $2.24M | ﹤0.01% |
1,161
+41
| +4% | +$926 |
|
|
HRC
1388
PUT
DELISTED
HILL-ROM HOLDINGS, INC.
HRC
| $2.24M | ﹤0.01% |
197
+194
| +6,467% | +$20.4K |
|
|
EGRX
1389
PUT
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $2.22M | ﹤0.01% |
370
+224
| +153% | +$13.4K |
|
1390
iShares 3-7 Year Treasury Bond ETF
IEI
$18.1B
| $2.22M | ﹤0.01% |
17,642
+2,907
| +20% | +$367K |
|
1391
PUT
Zimmer Biomet
ZBH
$17.7B
| $2.21M | ﹤0.01% |
152
-395
| -72% | -$54.5K |
|
1392
CALL
PVH
PVH
$3.71B
| $2.21M | ﹤0.01% |
210
-13
| -6% | -$1.24K |
|
1393
CALL
Aon
AON
$77.3B
| $2.21M | ﹤0.01% |
106
+66
| +165% | +$13.1K |
|
1394
CALL
Madison Square Garden
MSGS
$9.54B
| $2.21M | ﹤0.01% |
105
+26
| +33% | +$5.1K |
|
1395
CALL
Dentsply Sirona
XRAY
$2.59B
| $2.2M | ﹤0.01% |
389
-291
| -43% | -$16.2K |
|
|
HBI
1396
CALL
DELISTED
Hanesbrands
HBI
| $2.2M | ﹤0.01% |
1,481
+1,116
| +306% | +$17K |
|
1397
PUT
MBIA
MBI
$288M
| $2.19M | ﹤0.01% |
2,360
+2,055
| +674% | +$19.5K |
|
1398
CALL
NOV
NOV
$7.45B
| $2.19M | ﹤0.01% |
874
+227
| +35% | +$5.11K |
|
|
X
1399
PUT
DELISTED
US Steel
X
| $2.19M | ﹤0.01% |
1,918
-347
| -15% | -$4.31K |
|
|
PLAN
1400
PUT
DELISTED
Anaplan, Inc.
PLAN
| $2.19M | ﹤0.01% |
417
+245
| +142% | +$12.2K |
|
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.