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 |
Invesco QQQ Trust
QQQ
|
+$77.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$73.2M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$38.5M |
| 4 |
Netflix
NFLX
|
+$38.4M |
| 5 |
NVIDIA
NVDA
|
+$36.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$55.9M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
+$28.3M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$23.1M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$23.1M |
| 5 |
Adobe
ADBE
|
+$22M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.47% |
| 3 | Communication Services | 0.34% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3801
Amphenol
APH
$184B
| $238K | ﹤0.01% |
+9,964
| New | +$222K |
|
|
LORL
3802
DELISTED
Loral Space and Communications, Inc.
LORL
| $238K | ﹤0.01% |
12,198
+12,149
| +24,794% | +$227K |
|
|
LM
3803
DELISTED
Legg Mason, Inc.
LM
| $238K | ﹤0.01% |
4,800
-5,889
| -55% | -$292K |
|
3804
PUT
Alliance Resource Partners
ARLP
$3.3B
| $237K | ﹤0.01% |
728
+137
| +23% | +$470 |
|
3805
CALL
Blink Charging
BLNK
$79.5M
| $237K | ﹤0.01% |
419
+98
| +31% | +$197 |
|
3806
Alcon
ALC
$32.8B
| $236K | ﹤0.01% |
4,134
-5,443
| -57% | -$308K |
|
3807
Azenta
AZTA
$1.27B
| $236K | ﹤0.01% |
5,338
+1,649
| +45% | +$63.1K |
|
3808
PUT
Iovance Biotherapeutics
IOVA
$2.19B
| $236K | ﹤0.01% |
86
-200
| -70% | -$6.58K |
|
3809
PUT
Loews
L
$24.4B
| $236K | ﹤0.01% |
69
+49
| +245% | +$1.65K |
|
3810
Marcus Corp
MCS
$752M
| $236K | ﹤0.01% |
17,820
-20,934
| -54% | -$281K |
|
|
NVMI
3811
CALL
Nova
NVMI
$13.6B
| $236K | ﹤0.01% |
+49
| New | +$2.08K |
|
|
HTT
3812
CALL
High Templar Tech Ltd
HTT
$376M
| $236K | ﹤0.01% |
1,390
+141
| +11% | +$233 |
|
|
IPHI
3813
DELISTED
INPHI CORPORATION
IPHI
| $236K | ﹤0.01% |
2,011
-140
| -7% | -$14.7K |
|
3814
CALL
Diamondrock Hospitality Co
DRH
$2.64B
| $235K | ﹤0.01% |
425
+205
| +93% | +$1.13K |
|
3815
Consolidated Edison
ED
$41.1B
| $235K | ﹤0.01% |
3,269
-3,459
| -51% | -$266K |
|
3816
CALL
Honda
HMC
$37.8B
| $235K | ﹤0.01% |
92
+29
| +46% | +$705 |
|
|
OPLN
3817
PUT
Openlane
OPLN
$4.25B
| $235K | ﹤0.01% |
171
+39
| +30% | +$535 |
|
3818
Sinclair Inc
SBGI
$974M
| $235K | ﹤0.01% |
12,731
+10,122
| +388% | +$176K |
|
3819
PUT
Valley National Bancorp
VLY
$7.94B
| $235K | ﹤0.01% |
301
+197
| +189% | +$1.51K |
|
3820
CALL
Wintrust Financial
WTFC
$10.7B
| $235K | ﹤0.01% |
54
+46
| +575% | +$1.84K |
|
3821
ADT
ADT
$5.24B
| $234K | ﹤0.01% |
29,365
+15,147
| +107% | +$98K |
|
3822
PUT
American Superconductor
AMSC
$1.48B
| $234K | ﹤0.01% |
288
+109
| +61% | +$713 |
|
|
JMIA
3823
Jumia Technologies
JMIA
$752M
| $234K | ﹤0.01% |
+42,780
| New | +$197K |
|
3824
CALL
Repligen
RGEN
$7.39B
| $234K | ﹤0.01% |
19
-157
| -89% | -$18.5K |
|
|
CIR
3825
PUT
DELISTED
CIRCOR International, Inc
CIR
| $234K | ﹤0.01% |
92
+91
| +9,100% | +$1.42K |
|
Similar funds
Simplex Trading's Q2 2020 Portfolio in Review
As of Q2 2020, Simplex Trading held 8,917 positions worth $62.7B, up 11% from $56.7B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading's Q2 2020 filing shows 1,290 new, 3,427 increased, 2,723 reduced and 1,278 closed positions. Its largest new stake was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M. The largest sale was Apple, an estimated $55.9M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2020 buy was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M.
- Simplex Trading added most to Invesco QQQ Trust in Q2 2020, an estimated $77.3M increase.
- Simplex Trading's biggest Q2 2020 reduction was Apple, cutting an estimated $55.9M.
- Simplex Trading fully exited Adobe in Q2 2020, selling an estimated $22M.
- Simplex Trading's ten largest holdings make up 44% of its $62.7B portfolio in Q2 2020.
- Simplex Trading opened 1,290 new positions and closed 1,278 in Q2 2020.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $62.7B.
Based on Simplex Trading's 13F filing for Q2 2020, filed 13 Jul 2020.