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 | |
|---|---|---|---|---|---|---|
976
Palo Alto Networks
PANW
$265B
| $3.8M | 0.01% |
+98,598
| New | +$3.73M |
|
|
WCC
977
WESCO International
WCC
$16.1B
| $3.78M | 0.01% |
63,679
+63,503
| +36,081% | +$3.31M |
|
978
CALL
C.H. Robinson
CHRW
$24.2B
| $3.78M | 0.01% |
483
+16
| +3% | +$1.27K |
|
979
CALL
Prologis
PLD
$135B
| $3.77M | 0.01% |
423
+259
| +158% | +$23K |
|
980
CALL
Amdocs
DOX
$5.4B
| $3.77M | 0.01% |
522
+126
| +32% | +$8.58K |
|
981
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$251M
| $3.77M | 0.01% |
+103
| New | +$29.8K |
|
982
CALL
Estee Lauder
EL
$28.9B
| $3.76M | 0.01% |
182
-430
| -70% | -$83.5K |
|
983
PUT
Lennox International
LII
$18.7B
| $3.76M | 0.01% |
154
-64
| -29% | -$15.9K |
|
|
GRMN
984
PUT
Garmin
GRMN
$46.3B
| $3.76M | 0.01% |
385
+208
| +118% | +$19.4K |
|
985
PUT
National Health Investors
NHI
$3.88B
| $3.76M | 0.01% |
461
-259
| -36% | -$21.2K |
|
|
IPFF
986
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $3.76M | 0.01% |
644
-7
| -1% | -$105 |
|
987
State Street SPDR S&P Metals & Mining ETF
XME
$4.11B
| $3.75M | 0.01% |
127,937
+91,794
| +254% | +$2.51M |
|
988
PUT
Cboe Global Markets
CBOE
$29.8B
| $3.74M | 0.01% |
312
+127
| +69% | +$14.9K |
|
989
PUT
Editas Medicine
EDIT
$419M
| $3.74M | 0.01% |
1,264
+1,103
| +685% | +$27.5K |
|
990
State Street Utilities Select Sector SPDR ETF
XLU
$24B
| $3.73M | 0.01% |
115,546
-21,580
| -16% | -$685K |
|
991
CALL
Adient
ADNT
$1.58B
| $3.73M | 0.01% |
1,756
+157
| +10% | +$3.48K |
|
992
CALL
Teladoc Health
TDOC
$1.56B
| $3.73M | 0.01% |
445
-59
| -12% | -$4.49K |
|
993
Kinder Morgan
KMI
$72.9B
| $3.72M | 0.01% |
+175,862
| New | +$3.56M |
|
|
WWE
994
PUT
DELISTED
World Wrestling Entertainment
WWE
| $3.7M | 0.01% |
570
-42
| -7% | -$2.66K |
|
|
RP
995
PUT
DELISTED
RealPage, Inc.
RP
| $3.68M | 0.01% |
684
+233
| +52% | +$13.3K |
|
996
CALL
AerCap
AER
$23.4B
| $3.67M | 0.01% |
598
-39
| -6% | -$2.29K |
|
997
CALL
Lumen
LUMN
$6.73B
| $3.67M | 0.01% |
2,779
-779
| -22% | -$10.4K |
|
998
PUT
Avis
CAR
$5.62B
| $3.67M | 0.01% |
1,138
+559
| +97% | +$16.8K |
|
999
PUT
Nutrien
NTR
$32.9B
| $3.67M | 0.01% |
765
+538
| +237% | +$26K |
|
1000
Wynn Resorts
WYNN
$10B
| $3.66M | 0.01% |
26,334
-39,413
| -60% | -$4.79M |
|
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.