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
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1376
iShares Core S&P Small-Cap ETF
IJR
$109B
| $3.06M | ﹤0.01% |
33,266
-15,770
| -32% | -$1.3M |
|
|
ONEM
1377
CALL
DELISTED
1Life Healthcare
ONEM
| $3.06M | ﹤0.01% |
700
+327
| +88% | +$11.2K |
|
|
UNIT
1378
PUT
Uniti Group
UNIT
$2.63B
| $3.05M | ﹤0.01% |
2,604
-1,466
| -36% | -$15.3K |
|
1379
PUT
America Movil
AMX
$78.1B
| $3.05M | ﹤0.01% |
2,100
+551
| +36% | +$7.48K |
|
1380
PUT
Hershey
HSY
$35.4B
| $3.05M | ﹤0.01% |
200
-215
| -52% | -$31.8K |
|
1381
PUT
Steel Dynamics
STLD
$35.6B
| $3.04M | ﹤0.01% |
826
+669
| +426% | +$23.2K |
|
|
AL
1382
CALL
DELISTED
Air Lease Corp
AL
| $3.04M | ﹤0.01% |
685
+299
| +77% | +$10.7K |
|
1383
PUT
Healthpeak Properties
DOC
$15.4B
| $3.04M | ﹤0.01% |
1,005
+308
| +44% | +$8.96K |
|
1384
PUT
Toll Brothers
TOL
$14B
| $3.04M | ﹤0.01% |
699
-970
| -58% | -$45K |
|
1385
CALL
Darling Ingredients
DAR
$9.93B
| $3.03M | ﹤0.01% |
526
+206
| +64% | +$9.84K |
|
|
PARA
1386
DELISTED
Paramount Global Class B
PARA
| $3.03M | ﹤0.01% |
81,419
-28,810
| -26% | -$924K |
|
|
BZUN
1387
CALL
Baozun
BZUN
$144M
| $3.03M | ﹤0.01% |
881
+175
| +25% | +$6.42K |
|
1388
PUT
BHP
BHP
$213B
| $3.02M | ﹤0.01% |
519
+321
| +162% | +$16.1K |
|
1389
CALL
Lattice Semiconductor
LSCC
$17.6B
| $3.02M | ﹤0.01% |
660
+609
| +1,194% | +$23.5K |
|
1390
Adient
ADNT
$1.6B
| $3.01M | ﹤0.01% |
86,699
+63,485
| +273% | +$1.79M |
|
|
MAXR
1391
CALL
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $3.01M | ﹤0.01% |
780
-149
| -16% | -$4.38K |
|
1392
CALL
Albertsons Companies
ACI
$5.4B
| $3M | ﹤0.01% |
1,705
+1,360
| +394% | +$20.6K |
|
1393
PUT
Inovio Pharmaceuticals
INO
$79.8M
| $3M | ﹤0.01% |
282
-49
| -15% | -$6.52K |
|
1394
CALL
Momentus
MNTS
$88.7M
| – | – |
0
| – | – |
|
1395
CALL
Otis Worldwide
OTIS
$27.6B
| $2.98M | ﹤0.01% |
441
+294
| +200% | +$19.1K |
|
1396
PUT
Pacific Biosciences
PACB
$422M
| $2.98M | ﹤0.01% |
1,147
+1,126
| +5,362% | +$19.1K |
|
1397
PUT
Oshkosh
OSK
$9.67B
| $2.97M | ﹤0.01% |
345
+300
| +667% | +$23.9K |
|
1398
PUT
Papa John's
PZZA
$999M
| $2.97M | ﹤0.01% |
350
-281
| -45% | -$23K |
|
1399
PUT
Rapid7
RPD
$634M
| $2.97M | ﹤0.01% |
329
+304
| +1,216% | +$21.7K |
|
|
VSTO
1400
PUT
DELISTED
Vista Outdoor Inc.
VSTO
| $2.96M | ﹤0.01% |
1,245
+1,230
| +8,200% | +$26.2K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.