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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2876
CALL
ArcBest
ARCB
$3.32B
| $821K | ﹤0.01% |
11,300
+7,700
| +214% | +$619K |
|
2877
PUT
Corsair Gaming
CRSR
$1.14B
| $821K | ﹤0.01% |
72,400
-23,900
| -25% | -$343K |
|
|
PLYA
2878
CALL
DELISTED
Playa Hotels & Resorts
PLYA
| $821K | ﹤0.01% |
141,100
+35,500
| +34% | +$235K |
|
2879
CALL
SS&C Technologies
SSNC
$18.9B
| $821K | ﹤0.01% |
17,200
+16,800
| +4,200% | +$967K |
|
2880
CALL
Old Republic International
ORI
$10.7B
| $820K | ﹤0.01% |
39,200
+7,300
| +23% | +$164K |
|
2881
PUT
TG Therapeutics
TGTX
$8.51B
| $820K | ﹤0.01% |
138,600
-42,900
| -24% | -$281K |
|
2882
CALL
Americold
COLD
$4.19B
| $819K | ﹤0.01% |
33,300
+7,300
| +28% | +$221K |
|
2883
Intrepid Potash
IPI
$463M
| $819K | ﹤0.01% |
20,713
+3,223
| +18% | +$140K |
|
2884
PUT
Krispy Kreme
DNUT
$564M
| $818K | ﹤0.01% |
71,000
+13,200
| +23% | +$174K |
|
2885
SandRidge Energy
SD
$487M
| $818K | ﹤0.01% |
50,190
+22,127
| +79% | +$400K |
|
|
EGIO
2886
DELISTED
Edgio, Inc. Common Stock
EGIO
| $818K | ﹤0.01% |
7,359
+732
| +11% | +$86.6K |
|
2887
CALL
DTE Energy
DTE
$30.8B
| $816K | ﹤0.01% |
7,100
+6,000
| +545% | +$775K |
|
2888
CALL
Magnachip Semiconductor
MX
$118M
| $816K | ﹤0.01% |
79,700
+30,200
| +61% | +$396K |
|
2889
Paylocity
PCTY
$7.38B
| $815K | ﹤0.01% |
+3,376
| New | +$776K |
|
|
AUY
2890
DELISTED
Yamana Gold, Inc.
AUY
| $815K | ﹤0.01% |
179,962
-6,044
| -3% | -$28K |
|
2891
American Resources Corp
AREC
$184M
| $814K | ﹤0.01% |
304,917
+184,854
| +154% | +$452K |
|
2892
CALL
Backblaze
BLZE
$702M
| $814K | ﹤0.01% |
163,900
+42,800
| +35% | +$257K |
|
|
SEE
2893
CALL
DELISTED
Sealed Air
SEE
| $814K | ﹤0.01% |
18,300
+9,300
| +103% | +$510K |
|
2894
Fiverr
FVRR
$418M
| $813K | ﹤0.01% |
26,600
+24,740
| +1,330% | +$879K |
|
|
PTR
2895
PUT
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $813K | ﹤0.01% |
19,900
-6,700
| -25% | -$305K |
|
|
NNDM
2896
Nano Dimension
NNDM
$312M
| $812K | ﹤0.01% |
339,874
-8,796
| -3% | -$26.9K |
|
|
MFA
2897
CALL
MFA Financial
MFA
$931M
| $810K | ﹤0.01% |
104,200
-71,200
| -41% | -$795K |
|
2898
Insulet
PODD
$11.7B
| $810K | ﹤0.01% |
+3,535
| New | +$885K |
|
2899
PUT
Petco
WOOF
$802M
| $810K | ﹤0.01% |
72,600
-16,400
| -18% | -$240K |
|
2900
CALL
Delek Logistics
DKL
$3.03B
| $809K | ﹤0.01% |
15,900
+12,200
| +330% | +$664K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.