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 | |
|---|---|---|---|---|---|---|
3526
CALL
Vera Therapeutics
VERA
$2.39B
| $676K | ﹤0.01% |
15,700
+14,200
| +947% | +$506K |
|
|
VSTO
3527
PUT
DELISTED
Vista Outdoor Inc.
VSTO
| $675K | ﹤0.01% |
20,600
-9,300
| -31% | -$282K |
|
3528
CALL
AST SpaceMobile
ASTS
$16.9B
| $674K | ﹤0.01% |
232,700
-20,600
| -8% | -$69.1K |
|
|
PPL
3529
PUT
PPL Corp
PPL
$27.3B
| $674K | ﹤0.01% |
24,500
+1,700
| +7% | +$45.2K |
|
3530
Bumble
BMBL
$393M
| $673K | ﹤0.01% |
59,331
-14,313
| -19% | -$182K |
|
3531
iShares MSCI Germany ETF
EWG
$1.56B
| $673K | ﹤0.01% |
+21,227
| New | +$636K |
|
3532
CALL
Viper Energy
VNOM
$8.21B
| $673K | ﹤0.01% |
17,500
-120,600
| -87% | -$4.08M |
|
3533
MP Materials
MP
$7.35B
| $672K | ﹤0.01% |
47,022
-87,524
| -65% | -$1.38M |
|
|
ONC
3534
PUT
BeOne Medicines Ltd
ONC
$34.3B
| $672K | ﹤0.01% |
4,300
+2,300
| +115% | +$370K |
|
3535
Western Union
WU
$2.58B
| $671K | ﹤0.01% |
48,025
-75,931
| -61% | -$978K |
|
|
MOR
3536
CALL
DELISTED
MorphoSys AG American Depositary Shares
MOR
| $671K | ﹤0.01% |
37,000
+36,200
| +4,525% | +$535K |
|
|
HTGCR
3537
PUT
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $671K | ﹤0.01% |
36,400
-279,000
| -88% | -$5.14M |
|
3538
CALL
AAR Corp
AIR
$5.62B
| $670K | ﹤0.01% |
11,200
+1,100
| +11% | +$68.5K |
|
3539
Build-A-Bear
BBW
$443M
| $670K | ﹤0.01% |
+22,431
| New | +$538K |
|
3540
PUT
Blink Charging
BLNK
$74.1M
| $670K | ﹤0.01% |
222,900
-179,100
| -45% | -$505K |
|
3541
PUT
Huntington Ingalls Industries
HII
$11.8B
| $670K | ﹤0.01% |
2,300
-1,400
| -38% | -$386K |
|
3542
CALL
Fresenius Medical Care
FMS
$13.3B
| $669K | ﹤0.01% |
34,700
+30,600
| +746% | +$606K |
|
3543
PUT
Dorian LPG
LPG
$1.9B
| $669K | ﹤0.01% |
17,400
-75,700
| -81% | -$2.92M |
|
3544
PUT
NiSource
NI
$21.9B
| $669K | ﹤0.01% |
24,200
+8,800
| +57% | +$231K |
|
3545
PUT
AMN Healthcare
AMN
$1.35B
| $668K | ﹤0.01% |
10,700
+4,700
| +78% | +$320K |
|
3546
CALL
Itaú Unibanco
ITUB
$91.6B
| $668K | ﹤0.01% |
109,221
-319,506
| -75% | -$1.92M |
|
3547
CALL
CarGurus
CARG
$3.28B
| $667K | ﹤0.01% |
28,900
+9,700
| +51% | +$224K |
|
3548
PUT
Spectrum Brands
SPB
$2.08B
| $667K | ﹤0.01% |
7,500
-66,600
| -90% | -$5.44M |
|
3549
CALL
AppFolio
APPF
$6.31B
| $666K | ﹤0.01% |
2,700
-2,800
| -51% | -$604K |
|
3550
PUT
Brookfield Infrastructure
BIPC
$5.23B
| $666K | ﹤0.01% |
18,500
-14,400
| -44% | -$504K |
|
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.