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 | |
|---|---|---|---|---|---|---|
751
PUT
Pultegroup
PHM
$24.3B
| $4.36M | 0.01% |
1,380
-589
| -30% | -$18.4K |
|
752
PUT
Cencora
COR
$60B
| $4.34M | 0.01% |
509
-684
| -57% | -$54.1K |
|
753
PUT
Snap
SNAP
$7.35B
| $4.33M | 0.01% |
3,032
+363
| +14% | +$4.44K |
|
754
CALL
Yeti Holdings
YETI
$3.79B
| $4.33M | 0.01% |
1,496
+1,315
| +727% | +$37.9K |
|
|
ACB
755
CALL
Aurora Cannabis
ACB
$167M
| $4.33M | 0.01% |
46
+28
| +156% | +$28.1K |
|
|
JNPR
756
CALL
DELISTED
Juniper Networks
JNPR
| $4.32M | 0.01% |
1,624
+749
| +86% | +$20K |
|
757
CALL
KLA
KLAC
$279B
| $4.31M | 0.01% |
3,650
+240
| +7% | +$2.77K |
|
|
AYX
758
PUT
DELISTED
Alteryx Inc
AYX
| $4.31M | 0.01% |
395
+211
| +115% | +$19.2K |
|
759
PUT
Sherwin-Williams
SHW
$78.4B
| $4.31M | 0.01% |
282
+267
| +1,780% | +$39.9K |
|
|
TIF
760
CALL
DELISTED
Tiffany & Co.
TIF
| $4.31M | 0.01% |
460
-674
| -59% | -$67K |
|
761
CALL
NetApp
NTAP
$32.9B
| $4.3M | 0.01% |
697
+153
| +28% | +$10.3K |
|
|
GRMN
762
CALL
Garmin
GRMN
$47.1B
| $4.29M | 0.01% |
537
+89
| +20% | +$7.28K |
|
763
PUT
Five Below
FIVE
$11.3B
| $4.28M | 0.01% |
357
+3
| +0.8% | +$395 |
|
764
CALL
Keysight
KEYS
$54.8B
| $4.28M | 0.01% |
477
-175
| -27% | -$14.9K |
|
|
KL
765
CALL
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $4.28M | 0.01% |
998
+158
| +19% | +$5.48K |
|
766
CALL
Dropbox
DBX
$6.81B
| $4.28M | 0.01% |
1,709
+660
| +63% | +$15.2K |
|
767
CALL
iShares Convertible Bond ETF
ICVT
$7.29B
| $4.28M | 0.01% |
1,323
-13
| -1% | -$761 |
|
768
PUT
Pinterest
PINS
$12.4B
| $4.27M | 0.01% |
+1,569
| New | +$42.9K |
|
769
PUT
Avis
CAR
$5.68B
| $4.27M | 0.01% |
1,214
-781
| -39% | -$26.2K |
|
770
PUT
Expeditors International
EXPD
$23.1B
| $4.26M | 0.01% |
562
-49
| -8% | -$3.7K |
|
|
FITB
771
CALL
Fifth Third Bancorp
FITB
$52.1B
| $4.26M | 0.01% |
1,527
+635
| +71% | +$17.4K |
|
772
PUT
United States Natural Gas Fund
UNG
$472M
| $4.25M | 0.01% |
535
+68
| +15% | +$5.92K |
|
773
CALL
JB Hunt Transport Services
JBHT
$27.3B
| $4.21M | 0.01% |
461
+254
| +123% | +$24K |
|
774
CALL
United Parks & Resorts
PRKS
$2.11B
| $4.21M | 0.01% |
1,359
+724
| +114% | +$19.9K |
|
775
CALL
Vodafone
VOD
$35B
| $4.21M | 0.01% |
2,579
+1,214
| +89% | +$20.9K |
|
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.