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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3176
PUT
West Pharmaceutical
WST
$23.3B
| $949K | ﹤0.01% |
2,400
+2,200
| +1,100% | +$814K |
|
3177
DuPont de Nemours
DD
$18.9B
| $947K | ﹤0.01% |
+9,841
| New | +$876K |
|
3178
CALL
Noble Corp
NE
$6.88B
| $945K | ﹤0.01% |
19,500
-11,900
| -38% | -$536K |
|
3179
CALL
Sensata Technologies
ST
$6.75B
| $944K | ﹤0.01% |
25,700
-47,900
| -65% | -$1.68M |
|
|
ITCI
3180
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $944K | ﹤0.01% |
13,653
+2,558
| +23% | +$176K |
|
3181
PUT
Endava
DAVA
$147M
| $943K | ﹤0.01% |
24,800
+24,000
| +3,000% | +$1.44M |
|
3182
CALL
AllianceBernstein
AB
$3.54B
| $941K | ﹤0.01% |
27,100
-22,200
| -45% | -$738K |
|
3183
CALL
DTE Energy
DTE
$30.6B
| $941K | ﹤0.01% |
8,400
+7,500
| +833% | +$809K |
|
|
BECN
3184
CALL
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $940K | ﹤0.01% |
9,600
-13,400
| -58% | -$1.16M |
|
3185
PUT
Medifast
MED
$110M
| $938K | ﹤0.01% |
24,500
+12,500
| +104% | +$605K |
|
|
FITB
3186
Fifth Third Bancorp
FITB
$51.7B
| $937K | ﹤0.01% |
+25,203
| New | +$877K |
|
3187
PUT
Enovis
ENOV
$1.63B
| $936K | ﹤0.01% |
15,000
+12,600
| +525% | +$754K |
|
3188
CALL
FuboTV Inc
FUBO
$256M
| $936K | ﹤0.01% |
49,400
+25,375
| +106% | +$662K |
|
3189
Tradr 2X Long Innovation ETFShort Innovation Daily ETF
SARK
$43.9M
| $936K | ﹤0.01% |
11,614
+1,334
| +13% | +$111K |
|
3190
PUT
Group 1 Automotive
GPI
$4.01B
| $935K | ﹤0.01% |
3,200
+600
| +23% | +$164K |
|
3191
PUT
W.P. Carey
WPC
$17B
| $935K | ﹤0.01% |
23,400
-21,000
| -47% | -$1.26M |
|
3192
Coeur Mining
CDE
$15.8B
| $934K | ﹤0.01% |
247,934
-66,371
| -21% | -$191K |
|
3193
CALL
MINISO
MNSO
$3.72B
| $934K | ﹤0.01% |
45,600
+34,200
| +300% | +$655K |
|
3194
PUT
Lufax Holding
LU
$1.27B
| $933K | ﹤0.01% |
221,200
+84,200
| +61% | +$236K |
|
3195
Invesco DB Commodity Index Tracking Fund
DBC
$1.67B
| $930K | ﹤0.01% |
+40,529
| New | +$901K |
|
3196
CALL
Globe Life
GL
$13.5B
| $930K | ﹤0.01% |
8,000
+2,100
| +36% | +$257K |
|
3197
CALL
Bright Horizons
BFAM
$4.1B
| $929K | ﹤0.01% |
8,200
-13,200
| -62% | -$1.39M |
|
3198
PUT
Genuine Parts
GPC
$17.6B
| $929K | ﹤0.01% |
6,000
-21,800
| -78% | -$3.18M |
|
3199
PUT
ATI
ATI
$26.3B
| $926K | ﹤0.01% |
18,100
+11,000
| +155% | +$497K |
|
3200
Domo
DOMO
$161M
| $925K | ﹤0.01% |
103,802
+85,245
| +459% | +$886K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.