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
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3176
PUT
Range Resources
RRC
$8.85B
| $784K | ﹤0.01% |
23,400
-31,200
| -57% | -$1.12M |
|
3177
PUT
Rubrik
RBRK
$15.4B
| $784K | ﹤0.01% |
+25,600
| New | +$842K |
|
3178
PUT
Service Corp International
SCI
$11.4B
| $782K | ﹤0.01% |
11,000
+900
| +9% | +$63.9K |
|
3179
CALL
Rush Street Interactive
RSI
$3.26B
| $781K | ﹤0.01% |
81,500
-29,700
| -27% | -$238K |
|
3180
PUT
Unum
UNM
$13.8B
| $781K | ﹤0.01% |
15,300
-41,700
| -73% | -$2.16M |
|
3181
PUT
Brookfield Infrastructure
BIPC
$5.03B
| $780K | ﹤0.01% |
23,200
+4,700
| +25% | +$156K |
|
|
BAND
3182
CALL
Bandwidth Inc
BAND
$1.83B
| $776K | ﹤0.01% |
46,000
-39,500
| -46% | -$746K |
|
|
AMED
3183
DELISTED
Amedisys
AMED
| $774K | ﹤0.01% |
+8,433
| New | +$782K |
|
3184
CALL
United States Brent Oil Fund
BNO
$755M
| $774K | ﹤0.01% |
24,100
-6,600
| -21% | -$208K |
|
3185
CALL
Penske Automotive Group
PAG
$14.2B
| $774K | ﹤0.01% |
5,200
-13,300
| -72% | -$2.02M |
|
3186
American International
AIG
$42B
| $773K | ﹤0.01% |
10,420
-72,372
| -87% | -$5.53M |
|
3187
PUT
Credit Acceptance
CACC
$5.78B
| $772K | ﹤0.01% |
1,500
-300
| -17% | -$153K |
|
3188
Molina Healthcare
MOH
$10.4B
| $772K | ﹤0.01% |
+2,598
| New | +$882K |
|
3189
Medifast
MED
$110M
| $771K | ﹤0.01% |
+35,339
| New | +$942K |
|
3190
Hertz
HTZ
$632M
| $770K | ﹤0.01% |
218,288
+214,838
| +6,227% | +$1.09M |
|
3191
PUT
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.49B
| $770K | ﹤0.01% |
+3,900
| New | +$734K |
|
3192
PUT
Credo Technology Group
CRDO
$38.8B
| $769K | ﹤0.01% |
24,100
+500
| +2% | +$11.1K |
|
3193
CALL
Goldman Sachs BDC
GSBD
$979M
| $769K | ﹤0.01% |
51,200
+30,700
| +150% | +$471K |
|
3194
PUT
Viking Holdings
VIK
$46B
| $767K | ﹤0.01% |
+22,600
| New | +$682K |
|
3195
CALL
Aecom
ACM
$9.12B
| $766K | ﹤0.01% |
8,700
-700
| -7% | -$63.8K |
|
3196
Acadia Pharmaceuticals
ACAD
$4.35B
| $765K | ﹤0.01% |
47,110
-10,266
| -18% | -$166K |
|
3197
PUT
Lufax Holding
LU
$1.27B
| $765K | ﹤0.01% |
323,200
+102,000
| +46% | +$389K |
|
3198
MarketAxess Holdings
MKTX
$4.19B
| $765K | ﹤0.01% |
+3,816
| New | +$787K |
|
3199
WEC Energy
WEC
$37.1B
| $765K | ﹤0.01% |
9,753
-4,216
| -30% | -$342K |
|
3200
Denison Mines
DNN
$2.64B
| $763K | ﹤0.01% |
383,912
+220,559
| +135% | +$468K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.