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 | |
|---|---|---|---|---|---|---|
476
CALL
Agnico Eagle Mines
AEM
$72.2B
| $32.9M | 0.02% |
551,600
+220,100
| +66% | +$11.3M |
|
|
MRO
477
PUT
DELISTED
Marathon Oil Corporation
MRO
| $32.9M | 0.02% |
1,161,000
+222,300
| +24% | +$5.36M |
|
478
CALL
Cleveland-Cliffs
CLF
$6.34B
| $32.9M | 0.02% |
1,445,800
-391,100
| -21% | -$7.75M |
|
|
B
479
CALL
Barrick Mining
B
$62B
| $32.9M | 0.02% |
2,184,300
-104,300
| -5% | -$1.63M |
|
480
CALL
Live Nation Entertainment
LYV
$41.3B
| $32.8M | 0.02% |
309,900
-84,400
| -21% | -$7.98M |
|
481
PUT
Tapestry
TPR
$28.6B
| $32.7M | 0.02% |
689,400
+9,000
| +1% | +$386K |
|
482
PUT
Teck Resources
TECK
$29.2B
| $32.7M | 0.02% |
714,300
-124,500
| -15% | -$5M |
|
483
PUT
Viking Therapeutics
VKTX
$4.25B
| $32.4M | 0.02% |
395,300
+324,700
| +460% | +$14.4M |
|
484
CALL
Take-Two Interactive
TTWO
$42.8B
| $32.3M | 0.02% |
217,600
-115,100
| -35% | -$17.9M |
|
485
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$745M
| $32.2M | 0.02% |
719,700
-50,400
| -7% | -$1.07M |
|
486
CALL
General Mills
GIS
$19.3B
| $32M | 0.02% |
457,900
-29,300
| -6% | -$1.91M |
|
487
CrowdStrike
CRWD
$186B
| $31.8M | 0.02% |
+397,172
| New | +$30.4M |
|
488
PUT
ResMed
RMD
$27.9B
| $31.8M | 0.02% |
160,600
+103,500
| +181% | +$19M |
|
489
CALL
Carrier Global
CARR
$57.2B
| $31.8M | 0.02% |
546,700
+360,500
| +194% | +$20.3M |
|
490
Cisco
CSCO
$444B
| $31.7M | 0.02% |
634,238
+567,896
| +856% | +$28.3M |
|
491
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$152B
| $31.4M | 0.02% |
468,700
+88,900
| +23% | +$4.45M |
|
492
PUT
Zillow
Z
$6.83B
| $31.2M | 0.02% |
640,300
+30,400
| +5% | +$1.66M |
|
493
PUT
APA Corp
APA
$13.2B
| $31.2M | 0.02% |
907,300
+15,300
| +2% | +$485K |
|
494
PUT
Peabody Energy
BTU
$2.94B
| $31.2M | 0.02% |
1,285,700
+1,001,000
| +352% | +$25.2M |
|
495
CALL
Upstart Holdings
UPST
$2.6B
| $31.1M | 0.02% |
1,155,700
-287,200
| -20% | -$8.49M |
|
496
CALL
Altria Group
MO
$121B
| $31.1M | 0.02% |
712,300
+285,100
| +67% | +$11.8M |
|
497
CALL
SoFi Technologies
SOFI
$21.4B
| $31.1M | 0.02% |
4,254,800
-1,276,100
| -23% | -$10.1M |
|
498
Newmont
NEM
$100B
| $30.6M | 0.02% |
853,808
+301,998
| +55% | +$10.4M |
|
499
CALL
Riot Platforms
RIOT
$9.15B
| $30.5M | 0.02% |
2,488,400
+173,000
| +7% | +$2.25M |
|
|
B
500
PUT
Barrick Mining
B
$62B
| $30.4M | 0.02% |
1,824,000
-371,800
| -17% | -$5.82M |
|
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.