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 | |
|---|---|---|---|---|---|---|
1051
CALL
Lumentum
LITE
$60.8B
| $9.41M | 0.01% |
184,900
-40,300
| -18% | -$1.83M |
|
1052
PUT
Enbridge
ENB
$124B
| $9.41M | 0.01% |
264,400
+196,300
| +288% | +$7.01M |
|
1053
PUT
Parker-Hannifin
PH
$125B
| $9.41M | 0.01% |
18,600
+2,100
| +13% | +$1.13M |
|
1054
PUT
Fastenal
FAST
$53.5B
| $9.38M | 0.01% |
298,600
+56,600
| +23% | +$1.91M |
|
1055
CALL
Molson Coors Class B
TAP
$7.57B
| $9.37M | 0.01% |
184,400
+171,200
| +1,297% | +$9.9M |
|
1056
CALL
Entegris
ENTG
$19.9B
| $9.37M | 0.01% |
69,200
-66,000
| -49% | -$8.71M |
|
1057
PUT
MasTec
MTZ
$28.3B
| $9.35M | 0.01% |
87,400
-14,900
| -15% | -$1.51M |
|
1058
PUT
Transocean
RIG
$5.93B
| $9.33M | 0.01% |
1,743,400
-153,300
| -8% | -$886K |
|
1059
PUT
Bank of Montreal
BMO
$124B
| $9.31M | 0.01% |
111,100
+12,300
| +12% | +$1.12M |
|
|
BNY
1060
Bank of New York Mellon
BNY
$108B
| $9.31M | 0.01% |
155,531
+38,481
| +33% | +$2.23M |
|
1061
PUT
Neurocrine Biosciences
NBIX
$17.6B
| $9.29M | 0.01% |
67,500
+49,200
| +269% | +$6.75M |
|
1062
CALL
DaVita
DVA
$15.1B
| $9.28M | 0.01% |
67,000
+15,500
| +30% | +$2.14M |
|
1063
CALL
Amplify Online Retail ETF
IBUY
$106M
| $9.28M | 0.01% |
768,500
+398,500
| +108% | +$22M |
|
1064
PUT
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $9.23M | 0.01% |
39,500
-34,200
| -46% | -$2.11M |
|
1065
PUT
CME Group
CME
$90.9B
| $9.18M | 0.01% |
46,700
+12,900
| +38% | +$2.67M |
|
|
QLTB
1066
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $9.16M | 0.01% |
70,100
+23,000
| +49% | +$3.01M |
|
1067
CALL
Bunge Global
BG
$23.7B
| $9.12M | 0.01% |
85,400
-101,500
| -54% | -$10.6M |
|
1068
CALL
Ally Financial
ALLY
$13.4B
| $9.11M | 0.01% |
229,600
-29,300
| -11% | -$1.14M |
|
1069
CALL
Illinois Tool Works
ITW
$80.7B
| $9.1M | 0.01% |
38,400
+25,600
| +200% | +$6.32M |
|
1070
CALL
Bloom Energy
BE
$56.9B
| $9.09M | 0.01% |
742,500
+388,000
| +109% | +$4.95M |
|
|
DM
1071
PUT
DELISTED
Desktop Metal, Inc.
DM
| $9.08M | 0.01% |
2,199,700
+2,112,440
| +2,421% | +$14.4M |
|
|
MPT
1072
CALL
Medical Properties Trust
MPT
$2.91B
| $9.03M | 0.01% |
2,095,200
-41,000
| -2% | -$196K |
|
1073
CALL
Toll Brothers
TOL
$13.9B
| $9.02M | 0.01% |
78,300
-13,900
| -15% | -$1.68M |
|
1074
PUT
Kenvue
KVUE
$36.5B
| $9M | 0.01% |
495,100
+61,900
| +14% | +$1.2M |
|
1075
CALL
Cenovus Energy
CVE
$55.6B
| $8.99M | 0.01% |
457,400
-698,200
| -60% | -$14.1M |
|
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.