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 | |
|---|---|---|---|---|---|---|
1251
Vanguard FTSE Emerging Markets ETF
VWO
$119B
| $2.63M | 0.01% |
59,210
-129
| -0.2% | -$5.46K |
|
1252
PUT
Iron Mountain
IRM
$38.2B
| $2.63M | 0.01% |
826
+577
| +232% | +$18.9K |
|
1253
iShares TIPS Bond ETF
TIP
$14.5B
| $2.63M | 0.01% |
+22,521
| New | +$2.62M |
|
|
REGI
1254
DELISTED
Renewable Energy Group, Inc.
REGI
| $2.62M | 0.01% |
97,313
+48,976
| +101% | +$888K |
|
|
SGEN
1255
CALL
DELISTED
Seagen Inc. Common Stock
SGEN
| $2.62M | 0.01% |
229
+140
| +157% | +$14.8K |
|
|
NUAN
1256
CALL
DELISTED
Nuance Communications, Inc.
NUAN
| $2.61M | 0.01% |
1,626
+1,236
| +317% | +$20.5K |
|
|
PVG
1257
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $2.6M | 0.01% |
2,337
+1,271
| +119% | +$13.5K |
|
1258
CALL
Keurig Dr Pepper
KDP
$40.4B
| $2.6M | 0.01% |
898
+672
| +297% | +$19.3K |
|
1259
CALL
Chegg
CHGG
$108M
| $2.59M | 0.01% |
683
+172
| +34% | +$6.02K |
|
1260
PUT
Chemours
CC
$2.59B
| $2.58M | 0.01% |
1,427
+493
| +53% | +$8.19K |
|
1261
PUT
Axalta
AXTA
$7.01B
| $2.58M | 0.01% |
848
+11
| +1% | +$324 |
|
1262
PUT
DXC Technology
DXC
$1.63B
| $2.57M | 0.01% |
685
-79
| -10% | -$2.58K |
|
1263
CALL
Etsy
ETSY
$7.65B
| $2.57M | 0.01% |
581
-1,594
| -73% | -$75.9K |
|
|
HUYA
1264
PUT
Huya Inc
HUYA
$542M
| $2.57M | 0.01% |
1,433
+726
| +103% | +$15.4K |
|
1265
Lennar Class A
LEN
$20.4B
| $2.57M | 0.01% |
47,563
+44,405
| +1,406% | +$2.53M |
|
1266
PUT
TJX Companies
TJX
$170B
| $2.56M | 0.01% |
420
+66
| +19% | +$3.9K |
|
1267
CALL
Fidelity National Information Services
FIS
$21.5B
| $2.56M | 0.01% |
184
-291
| -61% | -$39K |
|
1268
Tyson Foods
TSN
$20.2B
| $2.56M | 0.01% |
28,107
+5,065
| +22% | +$436K |
|
|
BBBY
1269
DELISTED
Bed Bath & Beyond Inc
BBBY
| $2.56M | 0.01% |
147,759
+47,744
| +48% | +$669K |
|
1270
CALL
Williams Companies
WMB
$90.5B
| $2.55M | 0.01% |
1,077
-258
| -19% | -$5.91K |
|
1271
PUT
TripAdvisor
TRIP
$1.59B
| $2.55M | 0.01% |
839
+472
| +129% | +$15.9K |
|
1272
PUT
Alaska Air
ALK
$5.15B
| $2.54M | 0.01% |
375
+215
| +134% | +$14.7K |
|
|
SAVE
1273
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $2.53M | 0.01% |
628
+227
| +57% | +$8.63K |
|
1274
CALL
Pultegroup
PHM
$24.5B
| $2.53M | 0.01% |
652
-369
| -36% | -$14.3K |
|
1275
CALL
NIO
NIO
$11.3B
| $2.52M | 0.01% |
6,282
+1,033
| +20% | +$2.08K |
|
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.