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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
VanEck Gold Miners ETF
GDX
$22.9B
| $7.55M | 0.01% |
222,118
-362,314
| -62% | -$13.2M |
|
877
Morgan Stanley
MS
$338B
| $7.54M | 0.01% |
+82,188
| New | +$7.05M |
|
878
PUT
BILL Holdings
BILL
$4.11B
| $7.53M | 0.01% |
41,100
+40,602
| +8,153% | +$6.36M |
|
879
Abits Group
ABTS
$3.61M
| $7.52M | 0.01% |
+22,501
| New | +$3.57M |
|
880
CALL
Weyerhaeuser
WY
$17B
| $7.49M | 0.01% |
217,600
+216,349
| +17,294% | +$8.03M |
|
881
CALL
Molson Coors Class B
TAP
$7.51B
| $7.48M | 0.01% |
139,400
+138,110
| +10,706% | +$7.72M |
|
|
882
PUT
Molson Coors Class B
TAP
$7.51B
| $7.48M | 0.01% |
139,400
+137,902
| +9,206% | +$7.7M |
|
|
ZEN
883
CALL
DELISTED
ZENDESK INC
ZEN
| $7.48M | 0.01% |
51,800
+51,282
| +9,900% | +$7.24M |
|
884
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $7.46M | 0.01% |
42,000
+41,795
| +20,388% | +$7.24M |
|
885
PUT
Sabre
SABR
$668M
| $7.46M | 0.01% |
597,700
+593,629
| +14,582% | +$8.35M |
|
886
CALL
Elevance Health
ELV
$82.3B
| $7.45M | 0.01% |
19,500
+18,787
| +2,635% | +$7.18M |
|
|
DENT
887
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $7.45M | 0.01% |
194,000
+191,543
| +7,796% | +$7.35M |
|
888
PUT
Corpay
CPAY
$23.8B
| $7.42M | 0.01% |
29,000
+28,851
| +19,363% | +$7.98M |
|
889
Norwegian Cruise Line
NCLH
$8.59B
| $7.41M | 0.01% |
251,840
-256,483
| -50% | -$7.73M |
|
890
PUT
Dynatrace
DT
$11.8B
| $7.4M | 0.01% |
126,700
+125,611
| +11,535% | +$6.56M |
|
891
CALL
Kohl's
KSS
$2.06B
| $7.39M | 0.01% |
134,100
+132,230
| +7,071% | +$7.6M |
|
892
PUT
Interactive Brokers
IBKR
$40.9B
| $7.34M | 0.01% |
446,800
+443,896
| +15,286% | +$7.68M |
|
|
JMIA
893
PUT
Jumia Technologies
JMIA
$734M
| $7.34M | 0.01% |
242,100
+240,174
| +12,470% | +$7.27M |
|
894
PUT
Akamai
AKAM
$17.1B
| $7.32M | 0.01% |
+62,800
| New | +$7M |
|
895
PUT
Lithia Motors
LAD
$7.62B
| $7.32M | 0.01% |
21,300
+21,112
| +11,230% | +$7.63M |
|
896
CALL
MongoDB
MDB
$24.1B
| $7.3M | 0.01% |
20,200
+19,922
| +7,166% | +$6.16M |
|
897
PUT
Vail Resorts
MTN
$5.13B
| $7.28M | 0.01% |
23,000
+22,718
| +8,056% | +$7.24M |
|
898
CALL
Norfolk Southern
NSC
$78.3B
| $7.27M | 0.01% |
27,400
+26,964
| +6,184% | +$7.44M |
|
|
NUAN
899
CALL
DELISTED
Nuance Communications, Inc.
NUAN
| $7.26M | 0.01% |
133,400
+130,846
| +5,123% | +$6.9M |
|
900
CALL
Tandem Diabetes Care
TNDM
$1.16B
| $7.26M | 0.01% |
74,500
+74,299
| +36,965% | +$6.63M |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.