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 | |
|---|---|---|---|---|---|---|
4101
Baytex Energy
BTE
$2.86B
| $335K | ﹤0.01% |
96,542
+18,687
| +24% | +$66.9K |
|
|
LAC
4102
Lithium Americas
LAC
$972M
| $335K | ﹤0.01% |
125,334
+112,032
| +842% | +$495K |
|
4103
PUT
Comfort Systems
FIX
$57.2B
| $334K | ﹤0.01% |
1,100
-5,200
| -83% | -$1.65M |
|
4104
Heron Therapeutics
HRTX
$92M
| $334K | ﹤0.01% |
+95,631
| New | +$294K |
|
4105
CALL
Fidelity Enhanced Large Cap Core ETF
FELC
$7.9B
| $333K | ﹤0.01% |
6,100
-15,200
| -71% | -$447K |
|
4106
H&R Block
HRB
$5.7B
| $333K | ﹤0.01% |
+6,146
| New | +$306K |
|
4107
Listed Funds Trust Roundhill Magnificent Seven ETF
MAGS
$3.83B
| $333K | ﹤0.01% |
7,383
+6,166
| +507% | +$252K |
|
4108
CALL
Mercer International
MERC
$45.6M
| $333K | ﹤0.01% |
39,000
+38,000
| +3,800% | +$366K |
|
4109
CALL
AMN Healthcare
AMN
$1.35B
| $332K | ﹤0.01% |
6,500
-3,500
| -35% | -$198K |
|
4110
CALL
Gulfport Energy Corp
GPOR
$2.76B
| $332K | ﹤0.01% |
2,200
+1,400
| +175% | +$220K |
|
4111
CALL
VistaGen Therapeutics
VTGN
$9.55M
| $332K | ﹤0.01% |
95,500
-22,100
| -19% | -$95.7K |
|
4112
Birkenstock
BIRK
$7.7B
| $331K | ﹤0.01% |
6,088
+4,389
| +258% | +$218K |
|
4113
Humacyte
HUMA
$170M
| $331K | ﹤0.01% |
69,017
+38,605
| +127% | +$201K |
|
4114
PUT
BBVA Argentina
BBAR
$3.85B
| $330K | ﹤0.01% |
35,700
-21,300
| -37% | -$210K |
|
4115
PUT
Heartland Express
HTLD
$1.04B
| $330K | ﹤0.01% |
26,800
-9,300
| -26% | -$104K |
|
4116
PUT
Dorman Products
DORM
$4.28B
| $329K | ﹤0.01% |
3,600
+1,300
| +57% | +$119K |
|
4117
PUT
Installed Building Products
IBP
$6.47B
| $329K | ﹤0.01% |
1,600
-1,500
| -48% | -$338K |
|
4118
CALL
OppFi
OPFI
$824M
| $329K | ﹤0.01% |
97,100
+44,100
| +83% | +$134K |
|
|
RC
4119
CALL
Ready Capital
RC
$261M
| $329K | ﹤0.01% |
40,300
+2,300
| +6% | +$19.6K |
|
4120
CALL
Red Rock Resorts
RRR
$3.87B
| $329K | ﹤0.01% |
6,000
-23,300
| -80% | -$1.26M |
|
4121
YieldMax MSTR Option Income Strategy ETF
MSTY
$740M
| $329K | ﹤0.01% |
+2,282
| New | +$369K |
|
|
DM
4122
CALL
DELISTED
Desktop Metal, Inc.
DM
| $329K | ﹤0.01% |
79,700
+78,940
| +10,387% | +$540K |
|
|
VTNR
4123
CALL
DELISTED
Vertex Energy, Inc
VTNR
| $329K | ﹤0.01% |
348,500
+48,900
| +16% | +$57.4K |
|
4124
PUT
Apple Hospitality REIT
APLE
$3.97B
| $328K | ﹤0.01% |
22,600
+13,800
| +157% | +$206K |
|
4125
Editas Medicine
EDIT
$402M
| $328K | ﹤0.01% |
70,292
+42,826
| +156% | +$242K |
|
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.