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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
676
PUT
Ecolab
ECL
$74.1B
| $5.03M | 0.01% |
255
-40
| -14% | -$7.44K |
|
677
PUT
Dominion Energy
D
$62.8B
| $5.03M | 0.01% |
650
+330
| +103% | +$25.1K |
|
678
PUT
Teva Pharmaceuticals
TEVA
$36.3B
| $5.01M | 0.01% |
5,433
+2,903
| +115% | +$35K |
|
|
SPR
679
PUT
DELISTED
Spirit AeroSystems
SPR
| $5.01M | 0.01% |
616
+251
| +69% | +$21.2K |
|
680
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $5.01M | 0.01% |
407
-271
| -40% | -$33.8K |
|
681
CALL
Live Nation Entertainment
LYV
$41B
| $5M | 0.01% |
755
+444
| +143% | +$28.5K |
|
|
682
Walt Disney
DIS
$161B
| $4.98M | 0.01% |
35,697
-192,774
| -84% | -$25.6M |
|
683
CALL
Diageo
DEO
$45.7B
| $4.98M | 0.01% |
289
+29
| +11% | +$4.88K |
|
684
PUT
Cintas
CTAS
$81.3B
| $4.96M | 0.01% |
836
-12
| -1% | -$664 |
|
685
CALL
RH
RH
$3.14B
| $4.96M | 0.01% |
429
-607
| -59% | -$62.6K |
|
|
JWN
686
PUT
DELISTED
Nordstrom
JWN
| $4.94M | 0.01% |
1,552
+748
| +93% | +$28.2K |
|
|
ONCE
687
PUT
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $4.94M | 0.01% |
483
-269
| -36% | -$29K |
|
688
PUT
KB Home
KBH
$3.41B
| $4.92M | 0.01% |
1,914
+344
| +22% | +$8.86K |
|
689
PUT
Intercontinental Exchange
ICE
$81B
| $4.91M | 0.01% |
571
+380
| +199% | +$31K |
|
690
CALL
DXC Technology
DXC
$1.5B
| $4.9M | 0.01% |
888
+369
| +71% | +$21.4K |
|
691
CALL
Equity Lifestyle Properties
ELS
$12.8B
| $4.88M | 0.01% |
804
+394
| +96% | +$23.3K |
|
692
PUT
Innovative Industrial Properties
IIPR
$1.78B
| $4.87M | 0.01% |
394
+328
| +497% | +$30.1K |
|
|
WWE
693
CALL
DELISTED
World Wrestling Entertainment
WWE
| $4.85M | 0.01% |
672
+336
| +100% | +$27.5K |
|
694
CALL
NetEase
NTES
$76.9B
| $4.83M | 0.01% |
945
+5
| +0.5% | +$265 |
|
695
CALL
Suncor Energy
SU
$78.4B
| $4.82M | 0.01% |
1,548
+66
| +4% | +$2.11K |
|
696
PUT
Blackstone
BX
$99.6B
| $4.82M | 0.01% |
1,084
-448
| -29% | -$17.9K |
|
697
CALL
Devon Energy
DVN
$52.2B
| $4.81M | 0.01% |
1,688
-511
| -23% | -$15.2K |
|
698
CALL
Zoetis
ZTS
$31.3B
| $4.81M | 0.01% |
424
-157
| -27% | -$16.4K |
|
699
CALL
Planet Fitness
PLNT
$4.29B
| $4.79M | 0.01% |
662
-116
| -15% | -$8.74K |
|
|
JOYY
700
CALL
JOYY Inc
JOYY
$3.66B
| $4.79M | 0.01% |
688
+407
| +145% | +$31.1K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.