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 | |
|---|---|---|---|---|---|---|
|
GRRR
4551
CALL
Gorilla Technology Group
GRRR
$296M
| $225K | ﹤0.01% |
81,300
+79,780
| +5,249% | +$425K |
|
|
RDFN
4552
DELISTED
Redfin
RDFN
| $225K | ﹤0.01% |
37,524
-3,696
| -9% | -$23.1K |
|
|
SPTN
4553
PUT
DELISTED
SpartanNash
SPTN
| $225K | ﹤0.01% |
12,000
+7,000
| +140% | +$137K |
|
4554
CALL
Standex International
SXI
$3.33B
| $225K | ﹤0.01% |
+1,400
| New | +$237K |
|
4555
CALL
USA Compression Partners
USAC
$3.69B
| $225K | ﹤0.01% |
9,500
-600
| -6% | -$14.8K |
|
4556
CALL
Ameresco
AMRC
$980M
| $224K | ﹤0.01% |
7,800
-3,400
| -30% | -$93.7K |
|
4557
CALL
Expeditors International
EXPD
$22.3B
| $224K | ﹤0.01% |
1,800
-900
| -33% | -$107K |
|
4558
CALL
Kamada
KMDA
$404M
| $224K | ﹤0.01% |
44,900
-100
| -0.2% | -$527 |
|
4559
PUT
Life Time Group Holdings
LTH
$10.2B
| $224K | ﹤0.01% |
11,900
+7,900
| +198% | +$125K |
|
4560
CALL
Bank of Hawaii
BOH
$3.14B
| $223K | ﹤0.01% |
3,900
-3,500
| -47% | -$203K |
|
4561
Direxion Daily Energy Bull 2X ETF
ERX
$231M
| $223K | ﹤0.01% |
3,433
-26,316
| -88% | -$1.8M |
|
4562
PUT
Future Fuel
FF
$205M
| $223K | ﹤0.01% |
43,600
-8,200
| -16% | -$44.3K |
|
4563
PUT
LENSAR
LNSR
$64.5M
| $223K | ﹤0.01% |
49,700
+44,100
| +788% | +$170K |
|
4564
PUT
Acadia Healthcare
ACHC
$2.52B
| $222K | ﹤0.01% |
3,300
-400
| -11% | -$27.9K |
|
4565
Brookfield
BN
$102B
| $222K | ﹤0.01% |
+8,043
| New | +$224K |
|
4566
PUT
Arch Capital
ACGL
$36.5B
| $221K | ﹤0.01% |
2,200
-3,300
| -60% | -$321K |
|
4567
CALL
Accel Entertainment
ACEL
$1B
| $221K | ﹤0.01% |
21,600
+1,100
| +5% | +$11.7K |
|
4568
First Trust NASDAQ Cybersecurity ETF
CIBR
$13.9B
| $221K | ﹤0.01% |
+3,921
| New | +$215K |
|
|
EARN
4569
CALL
Ellington Residential Mortgage REIT
EARN
$166M
| $221K | ﹤0.01% |
+31,900
| New | +$221K |
|
4570
PUT
Silicon Laboratories
SLAB
$7.14B
| $221K | ﹤0.01% |
2,000
-1,500
| -43% | -$185K |
|
|
SNCY
4571
DELISTED
Sun Country Airlines
SNCY
| $221K | ﹤0.01% |
17,601
+7,074
| +67% | +$87.2K |
|
4572
Modine Manufacturing
MOD
$9.46B
| $220K | ﹤0.01% |
2,197
-1,525
| -41% | -$146K |
|
4573
CALL
NatWest
NWG
$69.9B
| $220K | ﹤0.01% |
+27,500
| New | +$213K |
|
4574
PUT
Vera Therapeutics
VERA
$2.33B
| $220K | ﹤0.01% |
6,100
-16,400
| -73% | -$651K |
|
4575
CALL
Golub Capital BDC
GBDC
$3.33B
| $219K | ﹤0.01% |
14,000
+11,000
| +367% | +$181K |
|
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.