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 | |
|---|---|---|---|---|---|---|
976
PUT
Vale
VALE
$62.9B
| $3.15M | 0.01% |
2,347
-2,583
| -52% | -$33.1K |
|
977
CALL
Macy's
M
$6.15B
| $3.15M | 0.01% |
1,468
+276
| +23% | +$6.28K |
|
978
PUT
Akamai
AKAM
$16.8B
| $3.15M | 0.01% |
393
+76
| +24% | +$5.88K |
|
979
BP
BP
$113B
| $3.15M | 0.01% |
76,795
+63,241
| +467% | +$2.65M |
|
980
CALL
ResMed
RMD
$28.3B
| $3.15M | 0.01% |
258
-184
| -42% | -$20.4K |
|
|
CERN
981
PUT
DELISTED
Cerner Corp
CERN
| $3.14M | 0.01% |
429
+370
| +627% | +$25K |
|
982
PUT
Zions Bancorporation
ZION
$10.1B
| $3.14M | 0.01% |
683
+84
| +14% | +$3.89K |
|
983
PUT
Viasat
VSAT
$9.79B
| $3.13M | 0.01% |
388
+337
| +661% | +$29.5K |
|
984
CALL
Sony
SONY
$123B
| $3.12M | 0.01% |
2,980
-4,305
| -59% | -$42.3K |
|
985
PUT
Roper Technologies
ROP
$36.3B
| $3.11M | 0.01% |
+85
| New | +$30.2K |
|
|
SAGE
986
CALL
DELISTED
Sage Therapeutics
SAGE
| $3.11M | 0.01% |
170
-96
| -36% | -$16.4K |
|
987
PUT
Owens Corning
OC
$11.5B
| $3.11M | 0.01% |
534
+37
| +7% | +$1.89K |
|
|
NVEE
988
PUT
DELISTED
NV5 Global
NVEE
| $3.1M | 0.01% |
1,524
+788
| +107% | +$14.1K |
|
989
CALL
Sensata Technologies
ST
$6.65B
| $3.1M | 0.01% |
633
-460
| -42% | -$21.9K |
|
|
CTLT
990
PUT
DELISTED
CATALENT, INC.
CTLT
| $3.1M | 0.01% |
572
-440
| -43% | -$20.1K |
|
991
PUT
Rio Tinto
RIO
$148B
| $3.1M | 0.01% |
497
-532
| -52% | -$31.9K |
|
992
PUT
Agios Pharmaceuticals
AGIO
$2.16B
| $3.09M | 0.01% |
620
+50
| +9% | +$2.67K |
|
993
PUT
NCR Voyix
VYX
$1.06B
| $3.09M | 0.01% |
1,619
-986
| -38% | -$18.3K |
|
|
994
CALL
Viasat
VSAT
$9.79B
| $3.09M | 0.01% |
382
+58
| +18% | +$5.07K |
|
995
CALL
Equifax
EFX
$20.3B
| $3.08M | 0.01% |
228
+172
| +307% | +$21.6K |
|
996
PUT
Realty Income
O
$61.2B
| $3.08M | 0.01% |
461
+343
| +291% | +$23.4K |
|
997
PUT
Ambarella
AMBA
$2.99B
| $3.07M | 0.01% |
696
+312
| +81% | +$14K |
|
998
PUT
Fate Therapeutics
FATE
$281M
| $3.07M | 0.01% |
1,512
-18
| -1% | -$324 |
|
999
CALL
Adient
ADNT
$1.6B
| $3.06M | 0.01% |
1,262
+956
| +312% | +$19.7K |
|
1000
CALL
Ford
F
$57.3B
| $3.06M | 0.01% |
2,992
-3,001
| -50% | -$29.6K |
|
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.