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 | |
|---|---|---|---|---|---|---|
3926
CALL
Cabaletta Bio
CABA
$445M
| $388K | ﹤0.01% |
51,900
-15,200
| -23% | -$186K |
|
3927
CALL
Federated Hermes
FHI
$4.59B
| $387K | ﹤0.01% |
11,800
+10,100
| +594% | +$339K |
|
|
DFTX
3928
CALL
Definium Therapeutics
DFTX
$5.57B
| $387K | ﹤0.01% |
53,800
-83,600
| -61% | -$731K |
|
3929
CALL
Safe Bulkers
SB
$761M
| $387K | ﹤0.01% |
66,500
-10,800
| -14% | -$58.2K |
|
3930
CALL
Trinity Capital Inc.
TRIN
$1.59B
| $387K | ﹤0.01% |
27,400
+8,800
| +47% | +$130K |
|
3931
Varonis Systems
VRNS
$5.13B
| $387K | ﹤0.01% |
8,076
+7,444
| +1,178% | +$330K |
|
3932
Bread Financial
BFH
$4.36B
| $386K | ﹤0.01% |
+8,664
| New | +$340K |
|
3933
CALL
LoveSac
LOVE
$248M
| $386K | ﹤0.01% |
17,100
-4,200
| -20% | -$101K |
|
3934
CALL
Intuitive Machines
LUNR
$1.98B
| $386K | ﹤0.01% |
117,200
-188,500
| -62% | -$937K |
|
3935
PUT
Fox Factory Holding Corp
FOXF
$801M
| $385K | ﹤0.01% |
8,000
+2,600
| +48% | +$118K |
|
3936
CALL
Live Oak Bancshares
LOB
$1.99B
| $385K | ﹤0.01% |
11,000
+8,000
| +267% | +$283K |
|
3937
CALL
Skywest
SKYW
$4.51B
| $385K | ﹤0.01% |
4,700
+3,900
| +488% | +$291K |
|
3938
CALL
Tootsie Roll Industries
TR
$2.94B
| $385K | ﹤0.01% |
13,367
+12,303
| +1,156% | +$347K |
|
3939
CALL
Vanguard Total International Stock ETF
VXUS
$153B
| $385K | ﹤0.01% |
6,400
-1,900
| -23% | -$115K |
|
3940
CALL
C4 Therapeutics
CCCC
$393M
| $384K | ﹤0.01% |
83,300
+51,600
| +163% | +$308K |
|
3941
Jazz Pharmaceuticals
JAZZ
$16.1B
| $383K | ﹤0.01% |
+3,593
| New | +$395K |
|
3942
CALL
Taboola.com
TBLA
$1.37B
| $383K | ﹤0.01% |
111,600
-3,300
| -3% | -$13.3K |
|
3943
CALL
TransDigm Group
TDG
$73.2B
| $383K | ﹤0.01% |
300
-100
| -25% | -$128K |
|
3944
CALL
Assurant
AIZ
$14B
| $382K | ﹤0.01% |
2,300
-2,400
| -51% | -$416K |
|
|
EFC
3945
CALL
Ellington Financial
EFC
$1.7B
| $382K | ﹤0.01% |
31,700
-5,400
| -15% | -$63.6K |
|
3946
PUT
Tucows
TCX
$101M
| $382K | ﹤0.01% |
19,800
+18,600
| +1,550% | +$358K |
|
|
3947
PUT
LoveSac
LOVE
$248M
| $381K | ﹤0.01% |
16,900
+9,300
| +122% | +$224K |
|
3948
CALL
NextDecade
NEXT
$1.63B
| $381K | ﹤0.01% |
48,100
-74,300
| -61% | -$512K |
|
3949
Zillow
ZG
$7.74B
| $381K | ﹤0.01% |
8,461
-19,209
| -69% | -$829K |
|
3950
PUT
Honda
HMC
$39.3B
| $380K | ﹤0.01% |
11,800
-4,700
| -28% | -$159K |
|
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.