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 | |
|---|---|---|---|---|---|---|
5101
PUT
Sonoco
SON
$5.57B
| $156K | ﹤0.01% |
2,700
+1,100
| +69% | +$62.8K |
|
5102
CALL
Strategic Education
STRA
$1.85B
| $156K | ﹤0.01% |
1,500
+400
| +36% | +$39.1K |
|
5103
UFP Technologies
UFPT
$1.97B
| $156K | ﹤0.01% |
621
+467
| +303% | +$88.8K |
|
5104
American Financial Group
AFG
$11.8B
| $155K | ﹤0.01% |
1,137
+579
| +104% | +$72.1K |
|
|
DX
5105
PUT
Dynex Capital
DX
$3.15B
| $155K | ﹤0.01% |
12,500
+12,100
| +3,025% | +$150K |
|
5106
PUT
GXO Logistics
GXO
$5.77B
| $155K | ﹤0.01% |
2,900
-38,800
| -93% | -$2.1M |
|
5107
International Money Express
IMXI
$357M
| $155K | ﹤0.01% |
6,795
+3,449
| +103% | +$72.4K |
|
5108
PUT
O-I Glass
OI
$1.1B
| $155K | ﹤0.01% |
9,400
+6,700
| +248% | +$106K |
|
5109
PUT
Pegasystems
PEGA
$5.02B
| $155K | ﹤0.01% |
4,800
+3,400
| +243% | +$95.4K |
|
5110
CALL
Rogers Communications
RCI
$18.3B
| $155K | ﹤0.01% |
3,800
+2,700
| +245% | +$122K |
|
5111
PUT
Rhythm Pharmaceuticals
RYTM
$6.81B
| $155K | ﹤0.01% |
3,600
-2,500
| -41% | -$109K |
|
5112
SandRidge Energy
SD
$514M
| $155K | ﹤0.01% |
10,701
-18,497
| -63% | -$250K |
|
5113
CALL
Vital Farms
VITL
$545M
| $155K | ﹤0.01% |
6,700
-6,200
| -48% | -$108K |
|
5114
Federal Agricultural Mortgage
AGM
$2.47B
| $154K | ﹤0.01% |
+785
| New | +$146K |
|
5115
PUT
Ardmore Shipping
ASC
$710M
| $154K | ﹤0.01% |
9,400
-93,700
| -91% | -$1.49M |
|
5116
PUT
ProShares Ether Strategy ETF
EETH
$54.1M
| $154K | ﹤0.01% |
+2,000
| New | +$134K |
|
5117
ICU Medical
ICUI
$4.21B
| $154K | ﹤0.01% |
1,444
-368
| -20% | -$36.6K |
|
|
SOHU
5118
Sohu.com
SOHU
$362M
| $154K | ﹤0.01% |
14,588
+11,428
| +362% | +$111K |
|
5119
CALL
Vishay Intertechnology
VSH
$5.25B
| $154K | ﹤0.01% |
6,800
-800
| -11% | -$17.8K |
|
|
TPC
5120
PUT
Tutor Perini Cor
TPC
$4.41B
| $154K | ﹤0.01% |
10,700
+6,700
| +168% | +$68.4K |
|
5121
PUT
Equinox Gold
EQX
$7.06B
| $153K | ﹤0.01% |
25,500
-29,400
| -54% | -$136K |
|
5122
PUT
EVgo
EVGO
$223M
| $153K | ﹤0.01% |
61,100
+24,900
| +69% | +$64.6K |
|
5123
Expeditors International
EXPD
$22B
| $153K | ﹤0.01% |
1,261
+1,106
| +714% | +$137K |
|
5124
CALL
Kodiak Gas Services
KGS
$5.92B
| $153K | ﹤0.01% |
+5,600
| New | +$135K |
|
5125
PUT
Insperity
NSP
$1.93B
| $153K | ﹤0.01% |
+1,400
| New | +$149K |
|
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.